./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix042.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.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-76401ed-m [2024-06-20 16:22:40,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:22:40,326 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:22:40,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:22:40,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:22:40,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:22:40,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:22:40,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:22:40,343 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:22:40,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:22:40,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:22:40,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:22:40,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:22:40,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:22:40,345 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:22:40,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:22:40,346 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:22:40,346 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:22:40,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:22:40,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:22:40,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:22:40,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:22:40,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:22:40,348 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:22:40,348 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:22:40,348 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:22:40,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:22:40,349 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:22:40,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:22:40,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:22:40,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:22:40,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:22:40,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:22:40,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:22:40,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:22:40,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:22:40,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:22:40,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:22:40,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:22:40,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:22:40,352 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:22:40,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:22:40,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:22:40,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:22:40,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:22:40,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:22:40,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:22:40,569 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:22:40,570 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:22:40,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml [2024-06-20 16:22:40,703 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:22:40,703 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:22:40,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-20 16:22:41,649 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:22:41,809 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:22:41,809 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-20 16:22:41,824 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4a51138/1a44b1b283c541859bd4bdd395a19767/FLAGc172e311c [2024-06-20 16:22:41,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4a51138/1a44b1b283c541859bd4bdd395a19767 [2024-06-20 16:22:41,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:22:41,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:22:41,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:22:41,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:22:41,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:22:41,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:40" (1/2) ... [2024-06-20 16:22:41,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b8ce42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:22:41, skipping insertion in model container [2024-06-20 16:22:41,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:40" (1/2) ... [2024-06-20 16:22:41,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@523d792a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:22:41, skipping insertion in model container [2024-06-20 16:22:41,845 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:22:41" (2/2) ... [2024-06-20 16:22:41,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b8ce42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:41, skipping insertion in model container [2024-06-20 16:22:41,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:22:41" (2/2) ... [2024-06-20 16:22:41,846 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:22:41,963 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:22:41,965 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:22:41,965 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:22:41,965 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 16:22:41,965 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:22:41,965 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-20 16:22:42,002 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:22:42,306 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:22:42,313 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:22:42,408 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:22:42,435 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:22:42,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42 WrapperNode [2024-06-20 16:22:42,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:22:42,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:22:42,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:22:42,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:22:42,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,494 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-20 16:22:42,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:22:42,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:22:42,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:22:42,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:22:42,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,510 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,532 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]. [2024-06-20 16:22:42,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,557 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:22:42,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:22:42,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:22:42,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:22:42,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (1/1) ... [2024-06-20 16:22:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:22:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:22:42,598 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) [2024-06-20 16:22:42,602 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 [2024-06-20 16:22:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:22:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:22:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:22:42,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:22:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:22:42,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:22:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:22:42,627 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:22:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:22:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:22:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:22:42,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:22:42,629 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:22:42,749 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:22:42,751 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:22:43,052 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:22:43,054 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:22:43,185 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:22:43,185 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:22:43,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:22:43 BoogieIcfgContainer [2024-06-20 16:22:43,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:22:43,188 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:22:43,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:22:43,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:22:43,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:22:40" (1/4) ... [2024-06-20 16:22:43,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b227a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:22:43, skipping insertion in model container [2024-06-20 16:22:43,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:22:41" (2/4) ... [2024-06-20 16:22:43,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b227a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:22:43, skipping insertion in model container [2024-06-20 16:22:43,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:22:42" (3/4) ... [2024-06-20 16:22:43,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b227a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:22:43, skipping insertion in model container [2024-06-20 16:22:43,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:22:43" (4/4) ... [2024-06-20 16:22:43,194 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.oepc.i [2024-06-20 16:22:43,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:22:43,206 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:22:43,206 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:22:43,243 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:22:43,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:22:43,292 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:22:43,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:22:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:22:43,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:22:43,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:22:43,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:22:43,306 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;@7ac300d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:22:43,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:22:43,309 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:22:43,309 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-20 16:22:43,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:22:43,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:43,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:22:43,310 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)] === [2024-06-20 16:22:43,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-20 16:22:43,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:43,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521780810] [2024-06-20 16:22:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:44,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:44,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521780810] [2024-06-20 16:22:44,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521780810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:44,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:44,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:22:44,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050115509] [2024-06-20 16:22:44,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:44,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:22:44,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:44,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:22:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:22:44,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:22:44,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:44,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:44,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:22:44,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:44,599 INFO L124 PetriNetUnfolderBase]: 1566/2396 cut-off events. [2024-06-20 16:22:44,599 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:22:44,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4807 conditions, 2396 events. 1566/2396 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11486 event pairs, 1097 based on Foata normal form. 1/2328 useless extension candidates. Maximal degree in co-relation 4795. Up to 2326 conditions per place. [2024-06-20 16:22:44,613 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-20 16:22:44,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-20 16:22:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:22:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:22:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-20 16:22:44,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-20 16:22:44,623 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-20 16:22:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-20 16:22:44,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:44,626 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:22:44,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 16:22:44,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:22:44,630 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:22:44,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:44,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:44,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:44,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:22:44,631 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)] === [2024-06-20 16:22:44,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-20 16:22:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:44,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330224164] [2024-06-20 16:22:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:45,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:45,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330224164] [2024-06-20 16:22:45,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330224164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:45,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:22:45,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639626918] [2024-06-20 16:22:45,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:22:45,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:22:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:22:45,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-20 16:22:45,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:45,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:45,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-20 16:22:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:45,668 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-20 16:22:45,668 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-20 16:22:45,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11430 event pairs, 930 based on Foata normal form. 3/2354 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-20 16:22:45,677 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 16:22:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-20 16:22:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:22:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:22:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 16:22:45,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 16:22:45,679 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-20 16:22:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-20 16:22:45,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:45,681 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:22:45,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 16:22:45,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:22:45,682 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:22:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:45,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:45,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:22:45,683 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)] === [2024-06-20 16:22:45,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 900820239, now seen corresponding path program 1 times [2024-06-20 16:22:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315990573] [2024-06-20 16:22:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:46,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315990573] [2024-06-20 16:22:46,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315990573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:46,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:46,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:22:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530096243] [2024-06-20 16:22:46,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:22:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:22:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:22:46,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:22:46,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:46,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:46,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:22:46,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:47,180 INFO L124 PetriNetUnfolderBase]: 1893/2870 cut-off events. [2024-06-20 16:22:47,180 INFO L125 PetriNetUnfolderBase]: For 1453/1453 co-relation queries the response was YES. [2024-06-20 16:22:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2870 events. 1893/2870 cut-off events. For 1453/1453 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13632 event pairs, 878 based on Foata normal form. 3/2830 useless extension candidates. Maximal degree in co-relation 7143. Up to 2753 conditions per place. [2024-06-20 16:22:47,193 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-20 16:22:47,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-20 16:22:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:47,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 16:22:47,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-20 16:22:47,198 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-20 16:22:47,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-20 16:22:47,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:22:47,202 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-20 16:22:47,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 16:22:47,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 16:22:47,203 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-20 16:22:47,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:47,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:47,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:47,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:22:47,205 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)] === [2024-06-20 16:22:47,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash -420998953, now seen corresponding path program 1 times [2024-06-20 16:22:47,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:47,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354915426] [2024-06-20 16:22:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:47,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:48,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:48,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354915426] [2024-06-20 16:22:48,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354915426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:48,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:48,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305898887] [2024-06-20 16:22:48,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:48,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:48,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:48,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-20 16:22:48,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:48,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:48,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-20 16:22:48,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:48,755 INFO L124 PetriNetUnfolderBase]: 1884/2855 cut-off events. [2024-06-20 16:22:48,755 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-20 16:22:48,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 2855 events. 1884/2855 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13519 event pairs, 690 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 7910. Up to 2708 conditions per place. [2024-06-20 16:22:48,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-20 16:22:48,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-20 16:22:48,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:48,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 16:22:48,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:22:48,771 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-20 16:22:48,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-20 16:22:48,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:48,774 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-20 16:22:48,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:22:48,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-20 16:22:48,775 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-20 16:22:48,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:48,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:48,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:48,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:22:48,775 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)] === [2024-06-20 16:22:48,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:48,776 INFO L85 PathProgramCache]: Analyzing trace with hash -856809485, now seen corresponding path program 1 times [2024-06-20 16:22:48,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:48,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56960623] [2024-06-20 16:22:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:48,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56960623] [2024-06-20 16:22:49,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56960623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:49,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:49,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:22:49,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345404950] [2024-06-20 16:22:49,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:22:49,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:49,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:22:49,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:22:49,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:49,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:49,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:49,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:49,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:49,805 INFO L124 PetriNetUnfolderBase]: 1879/2860 cut-off events. [2024-06-20 16:22:49,805 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-20 16:22:49,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 2860 events. 1879/2860 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13588 event pairs, 812 based on Foata normal form. 2/2825 useless extension candidates. Maximal degree in co-relation 8398. Up to 2767 conditions per place. [2024-06-20 16:22:49,819 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 16:22:49,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 373 flow [2024-06-20 16:22:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:22:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:22:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-20 16:22:49,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-20 16:22:49,820 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 92 transitions. [2024-06-20 16:22:49,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 373 flow [2024-06-20 16:22:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:49,823 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-20 16:22:49,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-20 16:22:49,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-20 16:22:49,824 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-20 16:22:49,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:49,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:49,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:22:49,825 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)] === [2024-06-20 16:22:49,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash -819888251, now seen corresponding path program 1 times [2024-06-20 16:22:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:49,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000966942] [2024-06-20 16:22:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:50,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000966942] [2024-06-20 16:22:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000966942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:50,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:50,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848818212] [2024-06-20 16:22:50,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:50,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:50,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:50,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:50,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:50,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:51,063 INFO L124 PetriNetUnfolderBase]: 1883/2867 cut-off events. [2024-06-20 16:22:51,064 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-20 16:22:51,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8976 conditions, 2867 events. 1883/2867 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13569 event pairs, 763 based on Foata normal form. 6/2872 useless extension candidates. Maximal degree in co-relation 8956. Up to 2725 conditions per place. [2024-06-20 16:22:51,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-20 16:22:51,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 494 flow [2024-06-20 16:22:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 16:22:51,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-20 16:22:51,078 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 116 transitions. [2024-06-20 16:22:51,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 494 flow [2024-06-20 16:22:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:51,081 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-20 16:22:51,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-20 16:22:51,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-20 16:22:51,082 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-20 16:22:51,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:51,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:51,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:51,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:22:51,083 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)] === [2024-06-20 16:22:51,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:51,083 INFO L85 PathProgramCache]: Analyzing trace with hash 347547538, now seen corresponding path program 1 times [2024-06-20 16:22:51,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:51,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234391909] [2024-06-20 16:22:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:51,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:51,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234391909] [2024-06-20 16:22:51,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234391909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:51,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:51,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:51,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363336974] [2024-06-20 16:22:51,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:51,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:51,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:51,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:51,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:51,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:51,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:51,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:52,300 INFO L124 PetriNetUnfolderBase]: 1894/2918 cut-off events. [2024-06-20 16:22:52,301 INFO L125 PetriNetUnfolderBase]: For 9080/9084 co-relation queries the response was YES. [2024-06-20 16:22:52,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 2918 events. 1894/2918 cut-off events. For 9080/9084 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14000 event pairs, 771 based on Foata normal form. 6/2922 useless extension candidates. Maximal degree in co-relation 10139. Up to 2754 conditions per place. [2024-06-20 16:22:52,319 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-20 16:22:52,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 613 flow [2024-06-20 16:22:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:22:52,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:22:52,321 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:22:52,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 613 flow [2024-06-20 16:22:52,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 597 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:52,327 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 405 flow [2024-06-20 16:22:52,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-20 16:22:52,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 16:22:52,328 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 405 flow [2024-06-20 16:22:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:52,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:52,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:22:52,329 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:22:52,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1269334708, now seen corresponding path program 2 times [2024-06-20 16:22:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:52,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809365876] [2024-06-20 16:22:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:52,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809365876] [2024-06-20 16:22:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809365876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:53,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:22:53,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717175187] [2024-06-20 16:22:53,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:22:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:22:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:22:53,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:53,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:53,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:53,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:53,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:53,569 INFO L124 PetriNetUnfolderBase]: 1889/2910 cut-off events. [2024-06-20 16:22:53,570 INFO L125 PetriNetUnfolderBase]: For 11512/11512 co-relation queries the response was YES. [2024-06-20 16:22:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10762 conditions, 2910 events. 1889/2910 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13984 event pairs, 767 based on Foata normal form. 2/2910 useless extension candidates. Maximal degree in co-relation 10736. Up to 2773 conditions per place. [2024-06-20 16:22:53,583 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-20 16:22:53,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 597 flow [2024-06-20 16:22:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:22:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:22:53,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:22:53,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:22:53,585 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 405 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:22:53,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 597 flow [2024-06-20 16:22:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 555 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 16:22:53,601 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-20 16:22:53,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-20 16:22:53,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 16:22:53,601 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-20 16:22:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:53,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:22:53,602 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)] === [2024-06-20 16:22:53,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2111046998, now seen corresponding path program 1 times [2024-06-20 16:22:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360516018] [2024-06-20 16:22:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360516018] [2024-06-20 16:22:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360516018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119253545] [2024-06-20 16:22:54,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:54,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:54,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:54,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:54,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:54,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:54,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:55,097 INFO L124 PetriNetUnfolderBase]: 1900/2926 cut-off events. [2024-06-20 16:22:55,098 INFO L125 PetriNetUnfolderBase]: For 13299/13299 co-relation queries the response was YES. [2024-06-20 16:22:55,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 conditions, 2926 events. 1900/2926 cut-off events. For 13299/13299 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14057 event pairs, 746 based on Foata normal form. 2/2926 useless extension candidates. Maximal degree in co-relation 10940. Up to 2768 conditions per place. [2024-06-20 16:22:55,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-20 16:22:55,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 665 flow [2024-06-20 16:22:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:22:55,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-20 16:22:55,116 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:22:55,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 665 flow [2024-06-20 16:22:55,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 631 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:22:55,125 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 429 flow [2024-06-20 16:22:55,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-20 16:22:55,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-20 16:22:55,125 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 429 flow [2024-06-20 16:22:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:55,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:55,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:22:55,126 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)] === [2024-06-20 16:22:55,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2110926842, now seen corresponding path program 1 times [2024-06-20 16:22:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333861480] [2024-06-20 16:22:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:55,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333861480] [2024-06-20 16:22:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333861480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:55,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755312539] [2024-06-20 16:22:55,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:56,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:56,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:56,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:56,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:56,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:56,428 INFO L124 PetriNetUnfolderBase]: 1984/3043 cut-off events. [2024-06-20 16:22:56,429 INFO L125 PetriNetUnfolderBase]: For 16952/16956 co-relation queries the response was YES. [2024-06-20 16:22:56,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12028 conditions, 3043 events. 1984/3043 cut-off events. For 16952/16956 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14606 event pairs, 682 based on Foata normal form. 7/3049 useless extension candidates. Maximal degree in co-relation 12000. Up to 2747 conditions per place. [2024-06-20 16:22:56,444 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-20 16:22:56,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 935 flow [2024-06-20 16:22:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-20 16:22:56,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-20 16:22:56,446 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 429 flow. Second operand 7 states and 143 transitions. [2024-06-20 16:22:56,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 935 flow [2024-06-20 16:22:56,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 889 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:22:56,457 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 604 flow [2024-06-20 16:22:56,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-20 16:22:56,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-20 16:22:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 604 flow [2024-06-20 16:22:56,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:56,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:56,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:56,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:22:56,460 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)] === [2024-06-20 16:22:56,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2110927028, now seen corresponding path program 2 times [2024-06-20 16:22:56,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:56,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360754108] [2024-06-20 16:22:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360754108] [2024-06-20 16:22:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360754108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:57,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564050688] [2024-06-20 16:22:57,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:57,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:57,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:57,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:57,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:57,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:57,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:57,740 INFO L124 PetriNetUnfolderBase]: 1995/3062 cut-off events. [2024-06-20 16:22:57,740 INFO L125 PetriNetUnfolderBase]: For 21866/21870 co-relation queries the response was YES. [2024-06-20 16:22:57,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 3062 events. 1995/3062 cut-off events. For 21866/21870 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14633 event pairs, 719 based on Foata normal form. 6/3066 useless extension candidates. Maximal degree in co-relation 13489. Up to 2856 conditions per place. [2024-06-20 16:22:57,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-20 16:22:57,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1004 flow [2024-06-20 16:22:57,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:22:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:22:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:22:57,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:22:57,758 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 604 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:22:57,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1004 flow [2024-06-20 16:22:57,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 968 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-20 16:22:57,773 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 710 flow [2024-06-20 16:22:57,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-20 16:22:57,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-20 16:22:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 710 flow [2024-06-20 16:22:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:57,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:22:57,775 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)] === [2024-06-20 16:22:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -673940364, now seen corresponding path program 2 times [2024-06-20 16:22:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:57,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917642333] [2024-06-20 16:22:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917642333] [2024-06-20 16:22:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917642333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:58,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:58,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596619778] [2024-06-20 16:22:58,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:58,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:58,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:58,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:58,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:58,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:58,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:58,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:22:59,123 INFO L124 PetriNetUnfolderBase]: 2031/3124 cut-off events. [2024-06-20 16:22:59,123 INFO L125 PetriNetUnfolderBase]: For 27323/27323 co-relation queries the response was YES. [2024-06-20 16:22:59,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14394 conditions, 3124 events. 2031/3124 cut-off events. For 27323/27323 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15089 event pairs, 1016 based on Foata normal form. 6/3129 useless extension candidates. Maximal degree in co-relation 14359. Up to 2931 conditions per place. [2024-06-20 16:22:59,143 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 94 selfloop transitions, 23 changer transitions 0/121 dead transitions. [2024-06-20 16:22:59,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1109 flow [2024-06-20 16:22:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:22:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:22:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:22:59,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:22:59,145 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 710 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:22:59,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1109 flow [2024-06-20 16:22:59,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 1056 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:22:59,163 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 800 flow [2024-06-20 16:22:59,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-20 16:22:59,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-20 16:22:59,164 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 800 flow [2024-06-20 16:22:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:59,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:22:59,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:22:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:22:59,165 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)] === [2024-06-20 16:22:59,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:22:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1933795508, now seen corresponding path program 3 times [2024-06-20 16:22:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:22:59,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245843001] [2024-06-20 16:22:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:22:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:22:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:22:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:22:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:22:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245843001] [2024-06-20 16:22:59,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245843001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:22:59,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:22:59,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:22:59,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199919231] [2024-06-20 16:22:59,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:22:59,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:22:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:22:59,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:22:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:22:59,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:22:59,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 800 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:22:59,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:22:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:22:59,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:00,381 INFO L124 PetriNetUnfolderBase]: 2026/3119 cut-off events. [2024-06-20 16:23:00,381 INFO L125 PetriNetUnfolderBase]: For 30384/30384 co-relation queries the response was YES. [2024-06-20 16:23:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14832 conditions, 3119 events. 2026/3119 cut-off events. For 30384/30384 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15068 event pairs, 1022 based on Foata normal form. 2/3119 useless extension candidates. Maximal degree in co-relation 14793. Up to 2960 conditions per place. [2024-06-20 16:23:00,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 15 changer transitions 0/118 dead transitions. [2024-06-20 16:23:00,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 1074 flow [2024-06-20 16:23:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:23:00,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:23:00,399 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 800 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:23:00,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 1074 flow [2024-06-20 16:23:00,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 996 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:00,423 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 760 flow [2024-06-20 16:23:00,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=760, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-20 16:23:00,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-20 16:23:00,424 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 760 flow [2024-06-20 16:23:00,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:00,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:00,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:00,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:23:00,424 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)] === [2024-06-20 16:23:00,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1933795322, now seen corresponding path program 3 times [2024-06-20 16:23:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:00,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552500274] [2024-06-20 16:23:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:00,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552500274] [2024-06-20 16:23:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552500274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146026888] [2024-06-20 16:23:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:01,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:01,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 760 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:01,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:01,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:01,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:01,654 INFO L124 PetriNetUnfolderBase]: 2030/3123 cut-off events. [2024-06-20 16:23:01,655 INFO L125 PetriNetUnfolderBase]: For 33181/33181 co-relation queries the response was YES. [2024-06-20 16:23:01,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14969 conditions, 3123 events. 2030/3123 cut-off events. For 33181/33181 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15088 event pairs, 1009 based on Foata normal form. 6/3128 useless extension candidates. Maximal degree in co-relation 14930. Up to 2870 conditions per place. [2024-06-20 16:23:01,676 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-20 16:23:01,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1227 flow [2024-06-20 16:23:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:23:01,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-20 16:23:01,677 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 760 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:23:01,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1227 flow [2024-06-20 16:23:01,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 1180 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:01,705 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 877 flow [2024-06-20 16:23:01,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=877, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-06-20 16:23:01,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-20 16:23:01,705 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 877 flow [2024-06-20 16:23:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:01,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:23:01,706 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)] === [2024-06-20 16:23:01,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1933549244, now seen corresponding path program 1 times [2024-06-20 16:23:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924622319] [2024-06-20 16:23:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924622319] [2024-06-20 16:23:02,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924622319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:02,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:02,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:23:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954017736] [2024-06-20 16:23:02,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:23:02,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:02,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:23:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:23:02,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:02,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 877 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:02,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:02,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:03,189 INFO L124 PetriNetUnfolderBase]: 2033/3127 cut-off events. [2024-06-20 16:23:03,190 INFO L125 PetriNetUnfolderBase]: For 38181/38181 co-relation queries the response was YES. [2024-06-20 16:23:03,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15571 conditions, 3127 events. 2033/3127 cut-off events. For 38181/38181 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15095 event pairs, 989 based on Foata normal form. 6/3132 useless extension candidates. Maximal degree in co-relation 15530. Up to 2915 conditions per place. [2024-06-20 16:23:03,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 26 changer transitions 0/131 dead transitions. [2024-06-20 16:23:03,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1279 flow [2024-06-20 16:23:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:23:03,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:03,205 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 877 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:23:03,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1279 flow [2024-06-20 16:23:03,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1227 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:03,229 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 931 flow [2024-06-20 16:23:03,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=931, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-20 16:23:03,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 16:23:03,230 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 931 flow [2024-06-20 16:23:03,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:03,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:03,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:03,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:23:03,230 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:03,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1517442386, now seen corresponding path program 1 times [2024-06-20 16:23:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:03,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938695602] [2024-06-20 16:23:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:03,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:03,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938695602] [2024-06-20 16:23:03,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938695602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:03,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:23:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383998748] [2024-06-20 16:23:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:03,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:23:03,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:03,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:23:03,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:23:03,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:23:03,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 931 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:03,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:03,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:23:03,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:04,340 INFO L124 PetriNetUnfolderBase]: 1897/2977 cut-off events. [2024-06-20 16:23:04,340 INFO L125 PetriNetUnfolderBase]: For 41004/41008 co-relation queries the response was YES. [2024-06-20 16:23:04,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15372 conditions, 2977 events. 1897/2977 cut-off events. For 41004/41008 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14847 event pairs, 1003 based on Foata normal form. 5/2979 useless extension candidates. Maximal degree in co-relation 15329. Up to 2769 conditions per place. [2024-06-20 16:23:04,354 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 94 selfloop transitions, 9 changer transitions 0/117 dead transitions. [2024-06-20 16:23:04,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 117 transitions, 1155 flow [2024-06-20 16:23:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:23:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:23:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-20 16:23:04,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-20 16:23:04,356 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 931 flow. Second operand 5 states and 92 transitions. [2024-06-20 16:23:04,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 117 transitions, 1155 flow [2024-06-20 16:23:04,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 117 transitions, 1065 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:04,380 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 865 flow [2024-06-20 16:23:04,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-20 16:23:04,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-20 16:23:04,380 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 865 flow [2024-06-20 16:23:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:04,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:04,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:23:04,381 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:04,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -488169795, now seen corresponding path program 1 times [2024-06-20 16:23:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:04,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811462998] [2024-06-20 16:23:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:05,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:05,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811462998] [2024-06-20 16:23:05,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811462998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:05,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:05,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:05,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469657242] [2024-06-20 16:23:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:05,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:05,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:05,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:05,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:05,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:05,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:05,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:05,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:06,257 INFO L124 PetriNetUnfolderBase]: 2109/3233 cut-off events. [2024-06-20 16:23:06,258 INFO L125 PetriNetUnfolderBase]: For 44967/44971 co-relation queries the response was YES. [2024-06-20 16:23:06,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16740 conditions, 3233 events. 2109/3233 cut-off events. For 44967/44971 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15519 event pairs, 679 based on Foata normal form. 6/3238 useless extension candidates. Maximal degree in co-relation 16696. Up to 2992 conditions per place. [2024-06-20 16:23:06,275 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 138 selfloop transitions, 43 changer transitions 0/185 dead transitions. [2024-06-20 16:23:06,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 1673 flow [2024-06-20 16:23:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:23:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:23:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-20 16:23:06,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:23:06,276 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 865 flow. Second operand 13 states and 234 transitions. [2024-06-20 16:23:06,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 1673 flow [2024-06-20 16:23:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 1655 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:06,301 INFO L231 Difference]: Finished difference. Result has 110 places, 136 transitions, 1210 flow [2024-06-20 16:23:06,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1210, PETRI_PLACES=110, PETRI_TRANSITIONS=136} [2024-06-20 16:23:06,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 16:23:06,302 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 136 transitions, 1210 flow [2024-06-20 16:23:06,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:06,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:06,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:23:06,302 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)] === [2024-06-20 16:23:06,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash 243605241, now seen corresponding path program 2 times [2024-06-20 16:23:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:06,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775085562] [2024-06-20 16:23:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:06,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:07,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775085562] [2024-06-20 16:23:07,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775085562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:07,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144548359] [2024-06-20 16:23:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:07,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:07,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 136 transitions, 1210 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:07,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:07,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:07,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:08,063 INFO L124 PetriNetUnfolderBase]: 2209/3390 cut-off events. [2024-06-20 16:23:08,064 INFO L125 PetriNetUnfolderBase]: For 54408/54410 co-relation queries the response was YES. [2024-06-20 16:23:08,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18596 conditions, 3390 events. 2209/3390 cut-off events. For 54408/54410 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16477 event pairs, 856 based on Foata normal form. 5/3394 useless extension candidates. Maximal degree in co-relation 18547. Up to 3143 conditions per place. [2024-06-20 16:23:08,082 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 150 selfloop transitions, 51 changer transitions 0/205 dead transitions. [2024-06-20 16:23:08,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 205 transitions, 2117 flow [2024-06-20 16:23:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:23:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:23:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 16:23:08,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:23:08,084 INFO L175 Difference]: Start difference. First operand has 110 places, 136 transitions, 1210 flow. Second operand 10 states and 180 transitions. [2024-06-20 16:23:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 205 transitions, 2117 flow [2024-06-20 16:23:08,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 205 transitions, 1922 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:08,129 INFO L231 Difference]: Finished difference. Result has 119 places, 172 transitions, 1623 flow [2024-06-20 16:23:08,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1623, PETRI_PLACES=119, PETRI_TRANSITIONS=172} [2024-06-20 16:23:08,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-20 16:23:08,130 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 172 transitions, 1623 flow [2024-06-20 16:23:08,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:08,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:08,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:08,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:23:08,131 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)] === [2024-06-20 16:23:08,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash 955826124, now seen corresponding path program 1 times [2024-06-20 16:23:08,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:08,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30452895] [2024-06-20 16:23:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30452895] [2024-06-20 16:23:08,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30452895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:08,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:08,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:08,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171568561] [2024-06-20 16:23:08,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:08,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:08,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:08,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:08,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:08,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:08,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 172 transitions, 1623 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:08,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:08,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:08,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:09,770 INFO L124 PetriNetUnfolderBase]: 2353/3585 cut-off events. [2024-06-20 16:23:09,770 INFO L125 PetriNetUnfolderBase]: For 62429/62431 co-relation queries the response was YES. [2024-06-20 16:23:09,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20306 conditions, 3585 events. 2353/3585 cut-off events. For 62429/62431 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17443 event pairs, 873 based on Foata normal form. 8/3588 useless extension candidates. Maximal degree in co-relation 20251. Up to 3222 conditions per place. [2024-06-20 16:23:09,793 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 182 selfloop transitions, 56 changer transitions 0/242 dead transitions. [2024-06-20 16:23:09,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 242 transitions, 2809 flow [2024-06-20 16:23:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:23:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:23:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:23:09,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-20 16:23:09,794 INFO L175 Difference]: Start difference. First operand has 119 places, 172 transitions, 1623 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:23:09,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 242 transitions, 2809 flow [2024-06-20 16:23:09,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 242 transitions, 2704 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:09,842 INFO L231 Difference]: Finished difference. Result has 129 places, 193 transitions, 1883 flow [2024-06-20 16:23:09,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1883, PETRI_PLACES=129, PETRI_TRANSITIONS=193} [2024-06-20 16:23:09,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-20 16:23:09,843 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 193 transitions, 1883 flow [2024-06-20 16:23:09,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:09,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:09,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:09,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:23:09,844 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)] === [2024-06-20 16:23:09,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash 243695606, now seen corresponding path program 2 times [2024-06-20 16:23:09,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:09,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762514181] [2024-06-20 16:23:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762514181] [2024-06-20 16:23:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762514181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192459509] [2024-06-20 16:23:10,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:10,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:10,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:10,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:10,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 193 transitions, 1883 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:10,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:10,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:10,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:11,422 INFO L124 PetriNetUnfolderBase]: 2541/3851 cut-off events. [2024-06-20 16:23:11,422 INFO L125 PetriNetUnfolderBase]: For 76003/76005 co-relation queries the response was YES. [2024-06-20 16:23:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23540 conditions, 3851 events. 2541/3851 cut-off events. For 76003/76005 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18841 event pairs, 867 based on Foata normal form. 12/3859 useless extension candidates. Maximal degree in co-relation 23482. Up to 3504 conditions per place. [2024-06-20 16:23:11,447 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 189 selfloop transitions, 72 changer transitions 0/265 dead transitions. [2024-06-20 16:23:11,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 265 transitions, 3156 flow [2024-06-20 16:23:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:23:11,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-20 16:23:11,448 INFO L175 Difference]: Start difference. First operand has 129 places, 193 transitions, 1883 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:23:11,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 265 transitions, 3156 flow [2024-06-20 16:23:11,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 265 transitions, 2871 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:11,511 INFO L231 Difference]: Finished difference. Result has 135 places, 228 transitions, 2297 flow [2024-06-20 16:23:11,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2297, PETRI_PLACES=135, PETRI_TRANSITIONS=228} [2024-06-20 16:23:11,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 16:23:11,512 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 228 transitions, 2297 flow [2024-06-20 16:23:11,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:11,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:11,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:11,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:23:11,512 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)] === [2024-06-20 16:23:11,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash 247414521, now seen corresponding path program 3 times [2024-06-20 16:23:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:11,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092714944] [2024-06-20 16:23:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:11,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:12,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:12,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092714944] [2024-06-20 16:23:12,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092714944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:12,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:12,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691430511] [2024-06-20 16:23:12,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:12,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:12,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:12,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 228 transitions, 2297 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:12,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:12,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:12,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:13,170 INFO L124 PetriNetUnfolderBase]: 2602/3946 cut-off events. [2024-06-20 16:23:13,170 INFO L125 PetriNetUnfolderBase]: For 83105/83117 co-relation queries the response was YES. [2024-06-20 16:23:13,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24692 conditions, 3946 events. 2602/3946 cut-off events. For 83105/83117 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19406 event pairs, 877 based on Foata normal form. 14/3956 useless extension candidates. Maximal degree in co-relation 24632. Up to 3634 conditions per place. [2024-06-20 16:23:13,195 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 200 selfloop transitions, 75 changer transitions 0/279 dead transitions. [2024-06-20 16:23:13,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 279 transitions, 3165 flow [2024-06-20 16:23:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:23:13,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:23:13,196 INFO L175 Difference]: Start difference. First operand has 135 places, 228 transitions, 2297 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:23:13,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 279 transitions, 3165 flow [2024-06-20 16:23:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 279 transitions, 3080 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:13,270 INFO L231 Difference]: Finished difference. Result has 144 places, 249 transitions, 2609 flow [2024-06-20 16:23:13,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2609, PETRI_PLACES=144, PETRI_TRANSITIONS=249} [2024-06-20 16:23:13,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-20 16:23:13,270 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 249 transitions, 2609 flow [2024-06-20 16:23:13,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:13,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:13,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:13,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:23:13,271 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)] === [2024-06-20 16:23:13,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 247414676, now seen corresponding path program 3 times [2024-06-20 16:23:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898016260] [2024-06-20 16:23:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:13,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:13,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898016260] [2024-06-20 16:23:13,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898016260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:13,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:13,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:13,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596868067] [2024-06-20 16:23:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:13,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 249 transitions, 2609 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:14,987 INFO L124 PetriNetUnfolderBase]: 2916/4388 cut-off events. [2024-06-20 16:23:14,988 INFO L125 PetriNetUnfolderBase]: For 101014/101026 co-relation queries the response was YES. [2024-06-20 16:23:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28324 conditions, 4388 events. 2916/4388 cut-off events. For 101014/101026 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21903 event pairs, 884 based on Foata normal form. 14/4399 useless extension candidates. Maximal degree in co-relation 28260. Up to 3382 conditions per place. [2024-06-20 16:23:15,020 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 224 selfloop transitions, 124 changer transitions 0/352 dead transitions. [2024-06-20 16:23:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 352 transitions, 4420 flow [2024-06-20 16:23:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-20 16:23:15,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-20 16:23:15,021 INFO L175 Difference]: Start difference. First operand has 144 places, 249 transitions, 2609 flow. Second operand 9 states and 188 transitions. [2024-06-20 16:23:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 352 transitions, 4420 flow [2024-06-20 16:23:15,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 352 transitions, 4282 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-20 16:23:15,109 INFO L231 Difference]: Finished difference. Result has 154 places, 286 transitions, 3240 flow [2024-06-20 16:23:15,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3240, PETRI_PLACES=154, PETRI_TRANSITIONS=286} [2024-06-20 16:23:15,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 16:23:15,109 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 286 transitions, 3240 flow [2024-06-20 16:23:15,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:15,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:15,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:15,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:23:15,110 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)] === [2024-06-20 16:23:15,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:15,110 INFO L85 PathProgramCache]: Analyzing trace with hash 753766522, now seen corresponding path program 4 times [2024-06-20 16:23:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629624402] [2024-06-20 16:23:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:15,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:15,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629624402] [2024-06-20 16:23:15,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629624402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:15,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:15,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:15,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688161637] [2024-06-20 16:23:15,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:15,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:15,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:15,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 286 transitions, 3240 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:15,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:15,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:15,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:16,837 INFO L124 PetriNetUnfolderBase]: 2920/4394 cut-off events. [2024-06-20 16:23:16,837 INFO L125 PetriNetUnfolderBase]: For 114007/114019 co-relation queries the response was YES. [2024-06-20 16:23:16,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30659 conditions, 4394 events. 2920/4394 cut-off events. For 114007/114019 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21952 event pairs, 863 based on Foata normal form. 14/4405 useless extension candidates. Maximal degree in co-relation 30590. Up to 3391 conditions per place. [2024-06-20 16:23:16,868 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 211 selfloop transitions, 139 changer transitions 0/354 dead transitions. [2024-06-20 16:23:16,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 354 transitions, 4729 flow [2024-06-20 16:23:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-20 16:23:16,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-20 16:23:16,870 INFO L175 Difference]: Start difference. First operand has 154 places, 286 transitions, 3240 flow. Second operand 9 states and 186 transitions. [2024-06-20 16:23:16,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 354 transitions, 4729 flow [2024-06-20 16:23:16,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 354 transitions, 4587 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:16,974 INFO L231 Difference]: Finished difference. Result has 163 places, 292 transitions, 3575 flow [2024-06-20 16:23:16,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3575, PETRI_PLACES=163, PETRI_TRANSITIONS=292} [2024-06-20 16:23:16,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-20 16:23:16,975 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 292 transitions, 3575 flow [2024-06-20 16:23:16,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:16,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:16,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:16,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:23:16,976 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)] === [2024-06-20 16:23:16,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1856623895, now seen corresponding path program 4 times [2024-06-20 16:23:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:16,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978536407] [2024-06-20 16:23:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:17,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978536407] [2024-06-20 16:23:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978536407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:17,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:17,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:17,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469357943] [2024-06-20 16:23:17,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:17,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:18,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:18,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 292 transitions, 3575 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:18,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:18,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:18,987 INFO L124 PetriNetUnfolderBase]: 2912/4388 cut-off events. [2024-06-20 16:23:18,987 INFO L125 PetriNetUnfolderBase]: For 119304/119306 co-relation queries the response was YES. [2024-06-20 16:23:19,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31357 conditions, 4388 events. 2912/4388 cut-off events. For 119304/119306 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21930 event pairs, 977 based on Foata normal form. 5/4389 useless extension candidates. Maximal degree in co-relation 31284. Up to 4056 conditions per place. [2024-06-20 16:23:19,021 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-06-20 16:23:19,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 325 transitions, 4379 flow [2024-06-20 16:23:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:23:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:23:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:23:19,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 16:23:19,022 INFO L175 Difference]: Start difference. First operand has 163 places, 292 transitions, 3575 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:23:19,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 325 transitions, 4379 flow [2024-06-20 16:23:19,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 325 transitions, 4099 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:19,128 INFO L231 Difference]: Finished difference. Result has 167 places, 292 transitions, 3471 flow [2024-06-20 16:23:19,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3295, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3471, PETRI_PLACES=167, PETRI_TRANSITIONS=292} [2024-06-20 16:23:19,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-20 16:23:19,128 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 292 transitions, 3471 flow [2024-06-20 16:23:19,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:19,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:19,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:19,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:23:19,129 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)] === [2024-06-20 16:23:19,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1014371210, now seen corresponding path program 5 times [2024-06-20 16:23:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:19,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165144903] [2024-06-20 16:23:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:19,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:19,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165144903] [2024-06-20 16:23:19,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165144903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:19,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:19,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:19,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367795085] [2024-06-20 16:23:19,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:19,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:19,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:20,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:20,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 292 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:20,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:20,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:20,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:20,874 INFO L124 PetriNetUnfolderBase]: 2948/4438 cut-off events. [2024-06-20 16:23:20,874 INFO L125 PetriNetUnfolderBase]: For 125276/125278 co-relation queries the response was YES. [2024-06-20 16:23:20,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31365 conditions, 4438 events. 2948/4438 cut-off events. For 125276/125278 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22139 event pairs, 938 based on Foata normal form. 12/4445 useless extension candidates. Maximal degree in co-relation 31291. Up to 3941 conditions per place. [2024-06-20 16:23:20,911 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 102 changer transitions 0/338 dead transitions. [2024-06-20 16:23:20,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 338 transitions, 4645 flow [2024-06-20 16:23:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:23:20,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 16:23:20,912 INFO L175 Difference]: Start difference. First operand has 167 places, 292 transitions, 3471 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:23:20,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 338 transitions, 4645 flow [2024-06-20 16:23:21,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 338 transitions, 4487 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:23:21,022 INFO L231 Difference]: Finished difference. Result has 168 places, 305 transitions, 3826 flow [2024-06-20 16:23:21,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=168, PETRI_TRANSITIONS=305} [2024-06-20 16:23:21,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-20 16:23:21,022 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 305 transitions, 3826 flow [2024-06-20 16:23:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:21,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:21,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:23:21,023 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)] === [2024-06-20 16:23:21,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1014221480, now seen corresponding path program 6 times [2024-06-20 16:23:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:21,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296526625] [2024-06-20 16:23:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:21,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:21,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:21,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296526625] [2024-06-20 16:23:21,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296526625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:21,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:21,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:21,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84441110] [2024-06-20 16:23:21,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:21,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:21,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:21,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:21,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:21,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 305 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:21,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:21,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:21,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:22,763 INFO L124 PetriNetUnfolderBase]: 3168/4747 cut-off events. [2024-06-20 16:23:22,763 INFO L125 PetriNetUnfolderBase]: For 135955/135965 co-relation queries the response was YES. [2024-06-20 16:23:22,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35091 conditions, 4747 events. 3168/4747 cut-off events. For 135955/135965 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23930 event pairs, 883 based on Foata normal form. 16/4760 useless extension candidates. Maximal degree in co-relation 35016. Up to 3501 conditions per place. [2024-06-20 16:23:22,807 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 195 changer transitions 0/379 dead transitions. [2024-06-20 16:23:22,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 379 transitions, 5636 flow [2024-06-20 16:23:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-20 16:23:22,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-20 16:23:22,809 INFO L175 Difference]: Start difference. First operand has 168 places, 305 transitions, 3826 flow. Second operand 8 states and 166 transitions. [2024-06-20 16:23:22,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 379 transitions, 5636 flow [2024-06-20 16:23:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 379 transitions, 5446 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:23,007 INFO L231 Difference]: Finished difference. Result has 174 places, 335 transitions, 4723 flow [2024-06-20 16:23:23,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4723, PETRI_PLACES=174, PETRI_TRANSITIONS=335} [2024-06-20 16:23:23,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-20 16:23:23,007 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 335 transitions, 4723 flow [2024-06-20 16:23:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:23,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:23,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:23,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:23:23,008 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)] === [2024-06-20 16:23:23,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1014227215, now seen corresponding path program 5 times [2024-06-20 16:23:23,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:23,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596489321] [2024-06-20 16:23:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:23,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:23,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596489321] [2024-06-20 16:23:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596489321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:23,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:23,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215071049] [2024-06-20 16:23:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:23,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:24,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:24,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 335 transitions, 4723 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:24,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:24,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:24,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:24,840 INFO L124 PetriNetUnfolderBase]: 3179/4771 cut-off events. [2024-06-20 16:23:24,840 INFO L125 PetriNetUnfolderBase]: For 129319/129329 co-relation queries the response was YES. [2024-06-20 16:23:24,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36741 conditions, 4771 events. 3179/4771 cut-off events. For 129319/129329 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 24040 event pairs, 972 based on Foata normal form. 12/4779 useless extension candidates. Maximal degree in co-relation 36662. Up to 4438 conditions per place. [2024-06-20 16:23:24,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 75 changer transitions 0/364 dead transitions. [2024-06-20 16:23:24,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 364 transitions, 5671 flow [2024-06-20 16:23:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:23:24,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:23:24,880 INFO L175 Difference]: Start difference. First operand has 174 places, 335 transitions, 4723 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:23:24,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 364 transitions, 5671 flow [2024-06-20 16:23:25,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 364 transitions, 5505 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-20 16:23:25,025 INFO L231 Difference]: Finished difference. Result has 180 places, 338 transitions, 4802 flow [2024-06-20 16:23:25,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4561, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4802, PETRI_PLACES=180, PETRI_TRANSITIONS=338} [2024-06-20 16:23:25,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 16:23:25,026 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 338 transitions, 4802 flow [2024-06-20 16:23:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:25,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:25,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:23:25,026 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)] === [2024-06-20 16:23:25,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1014227060, now seen corresponding path program 7 times [2024-06-20 16:23:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212856056] [2024-06-20 16:23:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:25,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212856056] [2024-06-20 16:23:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212856056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:25,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:25,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335528077] [2024-06-20 16:23:25,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:25,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:25,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:25,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 338 transitions, 4802 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:25,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:25,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:25,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:26,679 INFO L124 PetriNetUnfolderBase]: 3159/4736 cut-off events. [2024-06-20 16:23:26,680 INFO L125 PetriNetUnfolderBase]: For 131019/131029 co-relation queries the response was YES. [2024-06-20 16:23:26,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35837 conditions, 4736 events. 3159/4736 cut-off events. For 131019/131029 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23838 event pairs, 915 based on Foata normal form. 16/4749 useless extension candidates. Maximal degree in co-relation 35756. Up to 3508 conditions per place. [2024-06-20 16:23:26,722 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 201 selfloop transitions, 176 changer transitions 0/381 dead transitions. [2024-06-20 16:23:26,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 381 transitions, 6109 flow [2024-06-20 16:23:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-20 16:23:26,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-20 16:23:26,724 INFO L175 Difference]: Start difference. First operand has 180 places, 338 transitions, 4802 flow. Second operand 8 states and 165 transitions. [2024-06-20 16:23:26,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 381 transitions, 6109 flow [2024-06-20 16:23:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 381 transitions, 5866 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:26,962 INFO L231 Difference]: Finished difference. Result has 182 places, 338 transitions, 4933 flow [2024-06-20 16:23:26,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4933, PETRI_PLACES=182, PETRI_TRANSITIONS=338} [2024-06-20 16:23:26,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-20 16:23:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 338 transitions, 4933 flow [2024-06-20 16:23:26,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:26,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:23:26,964 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash 780332294, now seen corresponding path program 8 times [2024-06-20 16:23:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608354333] [2024-06-20 16:23:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608354333] [2024-06-20 16:23:27,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608354333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:27,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:27,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229186386] [2024-06-20 16:23:27,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:27,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:27,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:27,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:27,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:27,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 338 transitions, 4933 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:27,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:27,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:27,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:28,705 INFO L124 PetriNetUnfolderBase]: 3307/4958 cut-off events. [2024-06-20 16:23:28,706 INFO L125 PetriNetUnfolderBase]: For 150578/150578 co-relation queries the response was YES. [2024-06-20 16:23:28,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 4958 events. 3307/4958 cut-off events. For 150578/150578 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25159 event pairs, 1151 based on Foata normal form. 10/4964 useless extension candidates. Maximal degree in co-relation 38852. Up to 4390 conditions per place. [2024-06-20 16:23:28,750 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 326 selfloop transitions, 65 changer transitions 0/395 dead transitions. [2024-06-20 16:23:28,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 395 transitions, 6605 flow [2024-06-20 16:23:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-20 16:23:28,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-20 16:23:28,751 INFO L175 Difference]: Start difference. First operand has 182 places, 338 transitions, 4933 flow. Second operand 8 states and 157 transitions. [2024-06-20 16:23:28,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 395 transitions, 6605 flow [2024-06-20 16:23:28,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 395 transitions, 6017 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-20 16:23:28,886 INFO L231 Difference]: Finished difference. Result has 184 places, 357 transitions, 4942 flow [2024-06-20 16:23:28,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=184, PETRI_TRANSITIONS=357} [2024-06-20 16:23:28,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 16:23:28,887 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 357 transitions, 4942 flow [2024-06-20 16:23:28,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:28,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:28,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:28,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:23:28,887 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)] === [2024-06-20 16:23:28,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -331806802, now seen corresponding path program 9 times [2024-06-20 16:23:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:28,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956243355] [2024-06-20 16:23:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:29,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956243355] [2024-06-20 16:23:29,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956243355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:29,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:29,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:29,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479952933] [2024-06-20 16:23:29,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:29,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:29,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:29,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 357 transitions, 4942 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:29,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:29,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:29,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:30,806 INFO L124 PetriNetUnfolderBase]: 3287/4930 cut-off events. [2024-06-20 16:23:30,806 INFO L125 PetriNetUnfolderBase]: For 143316/143316 co-relation queries the response was YES. [2024-06-20 16:23:30,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37694 conditions, 4930 events. 3287/4930 cut-off events. For 143316/143316 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25037 event pairs, 1138 based on Foata normal form. 10/4936 useless extension candidates. Maximal degree in co-relation 37611. Up to 4381 conditions per place. [2024-06-20 16:23:30,852 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 328 selfloop transitions, 63 changer transitions 0/395 dead transitions. [2024-06-20 16:23:30,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 395 transitions, 6201 flow [2024-06-20 16:23:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:30,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:23:30,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-20 16:23:30,854 INFO L175 Difference]: Start difference. First operand has 184 places, 357 transitions, 4942 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:23:30,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 395 transitions, 6201 flow [2024-06-20 16:23:31,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 395 transitions, 5750 flow, removed 120 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:31,027 INFO L231 Difference]: Finished difference. Result has 186 places, 357 transitions, 4633 flow [2024-06-20 16:23:31,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4633, PETRI_PLACES=186, PETRI_TRANSITIONS=357} [2024-06-20 16:23:31,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-20 16:23:31,028 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 357 transitions, 4633 flow [2024-06-20 16:23:31,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:31,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:31,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:23:31,029 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)] === [2024-06-20 16:23:31,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 181882609, now seen corresponding path program 6 times [2024-06-20 16:23:31,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:31,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144309179] [2024-06-20 16:23:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:31,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144309179] [2024-06-20 16:23:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144309179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:31,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833353587] [2024-06-20 16:23:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:32,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:32,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 357 transitions, 4633 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:32,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:32,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:32,863 INFO L124 PetriNetUnfolderBase]: 3282/4926 cut-off events. [2024-06-20 16:23:32,863 INFO L125 PetriNetUnfolderBase]: For 141171/141171 co-relation queries the response was YES. [2024-06-20 16:23:32,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36619 conditions, 4926 events. 3282/4926 cut-off events. For 141171/141171 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25039 event pairs, 1187 based on Foata normal form. 2/4924 useless extension candidates. Maximal degree in co-relation 36536. Up to 4730 conditions per place. [2024-06-20 16:23:32,908 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 23 changer transitions 0/382 dead transitions. [2024-06-20 16:23:32,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 382 transitions, 5587 flow [2024-06-20 16:23:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:23:32,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:23:32,909 INFO L175 Difference]: Start difference. First operand has 186 places, 357 transitions, 4633 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:23:32,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 382 transitions, 5587 flow [2024-06-20 16:23:33,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 382 transitions, 5434 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:23:33,048 INFO L231 Difference]: Finished difference. Result has 187 places, 360 transitions, 4621 flow [2024-06-20 16:23:33,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4480, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4621, PETRI_PLACES=187, PETRI_TRANSITIONS=360} [2024-06-20 16:23:33,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 16:23:33,049 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 360 transitions, 4621 flow [2024-06-20 16:23:33,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:33,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:33,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:33,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:23:33,050 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)] === [2024-06-20 16:23:33,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash 189239994, now seen corresponding path program 10 times [2024-06-20 16:23:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:33,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688482797] [2024-06-20 16:23:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:33,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:33,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688482797] [2024-06-20 16:23:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688482797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:33,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:33,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88329508] [2024-06-20 16:23:33,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:33,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:33,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:33,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:33,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 360 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:33,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:33,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:33,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:34,868 INFO L124 PetriNetUnfolderBase]: 3280/4923 cut-off events. [2024-06-20 16:23:34,868 INFO L125 PetriNetUnfolderBase]: For 150190/150190 co-relation queries the response was YES. [2024-06-20 16:23:34,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36592 conditions, 4923 events. 3280/4923 cut-off events. For 150190/150190 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25041 event pairs, 1167 based on Foata normal form. 8/4927 useless extension candidates. Maximal degree in co-relation 36509. Up to 4659 conditions per place. [2024-06-20 16:23:34,924 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 361 selfloop transitions, 32 changer transitions 0/397 dead transitions. [2024-06-20 16:23:34,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 397 transitions, 5765 flow [2024-06-20 16:23:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:23:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:23:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:23:34,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:23:34,925 INFO L175 Difference]: Start difference. First operand has 187 places, 360 transitions, 4621 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:23:34,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 397 transitions, 5765 flow [2024-06-20 16:23:35,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 397 transitions, 5650 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:35,090 INFO L231 Difference]: Finished difference. Result has 189 places, 368 transitions, 4729 flow [2024-06-20 16:23:35,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=189, PETRI_TRANSITIONS=368} [2024-06-20 16:23:35,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 16:23:35,091 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 368 transitions, 4729 flow [2024-06-20 16:23:35,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:35,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:35,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:35,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:23:35,091 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)] === [2024-06-20 16:23:35,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash 189247651, now seen corresponding path program 1 times [2024-06-20 16:23:35,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:35,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054201448] [2024-06-20 16:23:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:35,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:35,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054201448] [2024-06-20 16:23:35,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054201448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:35,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929608069] [2024-06-20 16:23:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:35,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:35,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 368 transitions, 4729 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:35,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:35,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:35,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:36,930 INFO L124 PetriNetUnfolderBase]: 3282/4932 cut-off events. [2024-06-20 16:23:36,930 INFO L125 PetriNetUnfolderBase]: For 156743/156743 co-relation queries the response was YES. [2024-06-20 16:23:36,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36964 conditions, 4932 events. 3282/4932 cut-off events. For 156743/156743 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25103 event pairs, 1163 based on Foata normal form. 3/4934 useless extension candidates. Maximal degree in co-relation 36880. Up to 4676 conditions per place. [2024-06-20 16:23:36,979 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 33 changer transitions 0/394 dead transitions. [2024-06-20 16:23:36,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 394 transitions, 5766 flow [2024-06-20 16:23:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:23:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:23:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:23:36,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:23:36,982 INFO L175 Difference]: Start difference. First operand has 189 places, 368 transitions, 4729 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:23:36,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 394 transitions, 5766 flow [2024-06-20 16:23:37,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 394 transitions, 5643 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:37,155 INFO L231 Difference]: Finished difference. Result has 190 places, 372 transitions, 4774 flow [2024-06-20 16:23:37,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4774, PETRI_PLACES=190, PETRI_TRANSITIONS=372} [2024-06-20 16:23:37,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 16:23:37,156 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 372 transitions, 4774 flow [2024-06-20 16:23:37,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:37,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:37,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:37,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:23:37,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:37,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash -203925216, now seen corresponding path program 1 times [2024-06-20 16:23:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:37,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907684185] [2024-06-20 16:23:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:37,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:37,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907684185] [2024-06-20 16:23:37,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907684185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:37,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:37,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:23:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421744657] [2024-06-20 16:23:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:37,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:23:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:23:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:23:37,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:37,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 372 transitions, 4774 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:23:37,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:37,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:37,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:38,661 INFO L124 PetriNetUnfolderBase]: 3282/4858 cut-off events. [2024-06-20 16:23:38,661 INFO L125 PetriNetUnfolderBase]: For 181683/181818 co-relation queries the response was YES. [2024-06-20 16:23:38,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37899 conditions, 4858 events. 3282/4858 cut-off events. For 181683/181818 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 24253 event pairs, 1220 based on Foata normal form. 63/4891 useless extension candidates. Maximal degree in co-relation 37814. Up to 4676 conditions per place. [2024-06-20 16:23:38,707 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 352 selfloop transitions, 12 changer transitions 0/383 dead transitions. [2024-06-20 16:23:38,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 383 transitions, 5560 flow [2024-06-20 16:23:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:23:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:23:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:23:38,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:23:38,708 INFO L175 Difference]: Start difference. First operand has 190 places, 372 transitions, 4774 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:23:38,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 383 transitions, 5560 flow [2024-06-20 16:23:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 383 transitions, 5444 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:38,877 INFO L231 Difference]: Finished difference. Result has 191 places, 375 transitions, 4720 flow [2024-06-20 16:23:38,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4720, PETRI_PLACES=191, PETRI_TRANSITIONS=375} [2024-06-20 16:23:38,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:23:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 375 transitions, 4720 flow [2024-06-20 16:23:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:23:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:38,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:23:38,878 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)] === [2024-06-20 16:23:38,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1460563919, now seen corresponding path program 1 times [2024-06-20 16:23:38,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:38,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239453314] [2024-06-20 16:23:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:39,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239453314] [2024-06-20 16:23:39,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239453314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:39,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:23:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006577633] [2024-06-20 16:23:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:39,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:23:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:23:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:23:39,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:39,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 375 transitions, 4720 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:23:39,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:39,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:39,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:40,705 INFO L124 PetriNetUnfolderBase]: 3427/5120 cut-off events. [2024-06-20 16:23:40,705 INFO L125 PetriNetUnfolderBase]: For 197814/197821 co-relation queries the response was YES. [2024-06-20 16:23:40,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40476 conditions, 5120 events. 3427/5120 cut-off events. For 197814/197821 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 26099 event pairs, 866 based on Foata normal form. 10/5129 useless extension candidates. Maximal degree in co-relation 40390. Up to 4628 conditions per place. [2024-06-20 16:23:40,756 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 347 selfloop transitions, 73 changer transitions 0/425 dead transitions. [2024-06-20 16:23:40,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 425 transitions, 6166 flow [2024-06-20 16:23:40,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:23:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:23:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:23:40,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:23:40,758 INFO L175 Difference]: Start difference. First operand has 191 places, 375 transitions, 4720 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:23:40,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 425 transitions, 6166 flow [2024-06-20 16:23:40,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 425 transitions, 6126 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:23:40,944 INFO L231 Difference]: Finished difference. Result has 199 places, 384 transitions, 5118 flow [2024-06-20 16:23:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5118, PETRI_PLACES=199, PETRI_TRANSITIONS=384} [2024-06-20 16:23:40,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-20 16:23:40,945 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 384 transitions, 5118 flow [2024-06-20 16:23:40,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:23:40,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:40,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:23:40,945 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)] === [2024-06-20 16:23:40,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2046638527, now seen corresponding path program 1 times [2024-06-20 16:23:40,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620974950] [2024-06-20 16:23:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620974950] [2024-06-20 16:23:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620974950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:41,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:41,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:41,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565611471] [2024-06-20 16:23:41,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:41,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:41,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:41,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 384 transitions, 5118 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:41,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:41,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:41,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:43,333 INFO L124 PetriNetUnfolderBase]: 3645/5417 cut-off events. [2024-06-20 16:23:43,333 INFO L125 PetriNetUnfolderBase]: For 221767/221777 co-relation queries the response was YES. [2024-06-20 16:23:43,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44391 conditions, 5417 events. 3645/5417 cut-off events. For 221767/221777 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27738 event pairs, 996 based on Foata normal form. 8/5412 useless extension candidates. Maximal degree in co-relation 44302. Up to 4483 conditions per place. [2024-06-20 16:23:43,386 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 351 selfloop transitions, 137 changer transitions 0/493 dead transitions. [2024-06-20 16:23:43,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 493 transitions, 7750 flow [2024-06-20 16:23:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 16:23:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 16:23:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 300 transitions. [2024-06-20 16:23:43,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 16:23:43,388 INFO L175 Difference]: Start difference. First operand has 199 places, 384 transitions, 5118 flow. Second operand 15 states and 300 transitions. [2024-06-20 16:23:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 493 transitions, 7750 flow [2024-06-20 16:23:43,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 493 transitions, 7538 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:43,677 INFO L231 Difference]: Finished difference. Result has 212 places, 406 transitions, 5630 flow [2024-06-20 16:23:43,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5630, PETRI_PLACES=212, PETRI_TRANSITIONS=406} [2024-06-20 16:23:43,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-20 16:23:43,678 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 406 transitions, 5630 flow [2024-06-20 16:23:43,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:43,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:43,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:43,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:23:43,678 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)] === [2024-06-20 16:23:43,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2046517503, now seen corresponding path program 2 times [2024-06-20 16:23:43,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:43,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439737730] [2024-06-20 16:23:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:43,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:44,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439737730] [2024-06-20 16:23:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439737730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836907] [2024-06-20 16:23:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:44,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:44,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 406 transitions, 5630 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:44,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:44,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:44,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:46,017 INFO L124 PetriNetUnfolderBase]: 3737/5578 cut-off events. [2024-06-20 16:23:46,017 INFO L125 PetriNetUnfolderBase]: For 244250/244259 co-relation queries the response was YES. [2024-06-20 16:23:46,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46999 conditions, 5578 events. 3737/5578 cut-off events. For 244250/244259 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28938 event pairs, 1071 based on Foata normal form. 12/5584 useless extension candidates. Maximal degree in co-relation 46906. Up to 5111 conditions per place. [2024-06-20 16:23:46,068 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 378 selfloop transitions, 89 changer transitions 0/472 dead transitions. [2024-06-20 16:23:46,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 472 transitions, 7188 flow [2024-06-20 16:23:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:23:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:23:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-06-20 16:23:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-20 16:23:46,070 INFO L175 Difference]: Start difference. First operand has 212 places, 406 transitions, 5630 flow. Second operand 13 states and 237 transitions. [2024-06-20 16:23:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 472 transitions, 7188 flow [2024-06-20 16:23:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 472 transitions, 6949 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 16:23:46,319 INFO L231 Difference]: Finished difference. Result has 219 places, 420 transitions, 5903 flow [2024-06-20 16:23:46,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5903, PETRI_PLACES=219, PETRI_TRANSITIONS=420} [2024-06-20 16:23:46,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-20 16:23:46,320 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 420 transitions, 5903 flow [2024-06-20 16:23:46,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:46,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:46,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:23:46,320 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)] === [2024-06-20 16:23:46,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2046606783, now seen corresponding path program 3 times [2024-06-20 16:23:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:46,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478310490] [2024-06-20 16:23:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478310490] [2024-06-20 16:23:47,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478310490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:47,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:47,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:47,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498613089] [2024-06-20 16:23:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:47,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:47,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:47,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 420 transitions, 5903 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:47,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:47,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:48,685 INFO L124 PetriNetUnfolderBase]: 3740/5586 cut-off events. [2024-06-20 16:23:48,685 INFO L125 PetriNetUnfolderBase]: For 251370/251374 co-relation queries the response was YES. [2024-06-20 16:23:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47291 conditions, 5586 events. 3740/5586 cut-off events. For 251370/251374 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28951 event pairs, 1089 based on Foata normal form. 8/5588 useless extension candidates. Maximal degree in co-relation 47195. Up to 5206 conditions per place. [2024-06-20 16:23:48,746 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 386 selfloop transitions, 81 changer transitions 0/472 dead transitions. [2024-06-20 16:23:48,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 472 transitions, 7125 flow [2024-06-20 16:23:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:23:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:23:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 247 transitions. [2024-06-20 16:23:48,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200680272108844 [2024-06-20 16:23:48,748 INFO L175 Difference]: Start difference. First operand has 219 places, 420 transitions, 5903 flow. Second operand 14 states and 247 transitions. [2024-06-20 16:23:48,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 472 transitions, 7125 flow [2024-06-20 16:23:49,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 472 transitions, 6935 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-20 16:23:49,074 INFO L231 Difference]: Finished difference. Result has 225 places, 422 transitions, 5955 flow [2024-06-20 16:23:49,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5955, PETRI_PLACES=225, PETRI_TRANSITIONS=422} [2024-06-20 16:23:49,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 16:23:49,074 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 422 transitions, 5955 flow [2024-06-20 16:23:49,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:23:49,075 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)] === [2024-06-20 16:23:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1038231327, now seen corresponding path program 4 times [2024-06-20 16:23:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691214626] [2024-06-20 16:23:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:50,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:50,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691214626] [2024-06-20 16:23:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691214626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:50,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555869801] [2024-06-20 16:23:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:50,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:50,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 422 transitions, 5955 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:50,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:50,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:51,641 INFO L124 PetriNetUnfolderBase]: 3898/5835 cut-off events. [2024-06-20 16:23:51,641 INFO L125 PetriNetUnfolderBase]: For 271952/271956 co-relation queries the response was YES. [2024-06-20 16:23:51,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49834 conditions, 5835 events. 3898/5835 cut-off events. For 271952/271956 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 30682 event pairs, 1077 based on Foata normal form. 8/5837 useless extension candidates. Maximal degree in co-relation 49736. Up to 5407 conditions per place. [2024-06-20 16:23:51,693 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 409 selfloop transitions, 71 changer transitions 0/485 dead transitions. [2024-06-20 16:23:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 485 transitions, 7683 flow [2024-06-20 16:23:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:23:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:23:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-20 16:23:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-20 16:23:51,694 INFO L175 Difference]: Start difference. First operand has 225 places, 422 transitions, 5955 flow. Second operand 11 states and 201 transitions. [2024-06-20 16:23:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 485 transitions, 7683 flow [2024-06-20 16:23:52,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 485 transitions, 7373 flow, removed 75 selfloop flow, removed 12 redundant places. [2024-06-20 16:23:52,030 INFO L231 Difference]: Finished difference. Result has 225 places, 444 transitions, 6343 flow [2024-06-20 16:23:52,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6343, PETRI_PLACES=225, PETRI_TRANSITIONS=444} [2024-06-20 16:23:52,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-20 16:23:52,031 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 444 transitions, 6343 flow [2024-06-20 16:23:52,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:52,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:52,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:52,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:23:52,032 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:23:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1773661605, now seen corresponding path program 2 times [2024-06-20 16:23:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:52,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733792197] [2024-06-20 16:23:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:52,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:53,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733792197] [2024-06-20 16:23:53,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733792197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:53,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:53,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:53,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916597237] [2024-06-20 16:23:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:53,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:53,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 444 transitions, 6343 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:54,706 INFO L124 PetriNetUnfolderBase]: 4080/6096 cut-off events. [2024-06-20 16:23:54,706 INFO L125 PetriNetUnfolderBase]: For 293629/293633 co-relation queries the response was YES. [2024-06-20 16:23:54,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52365 conditions, 6096 events. 4080/6096 cut-off events. For 293629/293633 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32326 event pairs, 1081 based on Foata normal form. 12/6102 useless extension candidates. Maximal degree in co-relation 52265. Up to 5460 conditions per place. [2024-06-20 16:23:54,774 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 405 selfloop transitions, 113 changer transitions 0/523 dead transitions. [2024-06-20 16:23:54,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 523 transitions, 8418 flow [2024-06-20 16:23:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:23:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:23:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-20 16:23:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2024-06-20 16:23:54,775 INFO L175 Difference]: Start difference. First operand has 225 places, 444 transitions, 6343 flow. Second operand 12 states and 233 transitions. [2024-06-20 16:23:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 523 transitions, 8418 flow [2024-06-20 16:23:55,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 523 transitions, 8271 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 16:23:55,268 INFO L231 Difference]: Finished difference. Result has 234 places, 472 transitions, 6932 flow [2024-06-20 16:23:55,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6932, PETRI_PLACES=234, PETRI_TRANSITIONS=472} [2024-06-20 16:23:55,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-20 16:23:55,269 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 472 transitions, 6932 flow [2024-06-20 16:23:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:23:55,270 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)] === [2024-06-20 16:23:55,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1038170877, now seen corresponding path program 5 times [2024-06-20 16:23:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016086772] [2024-06-20 16:23:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:56,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:56,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016086772] [2024-06-20 16:23:56,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016086772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:56,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:56,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:56,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547956230] [2024-06-20 16:23:56,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:56,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:56,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:56,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:56,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 472 transitions, 6932 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:56,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:56,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:56,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:23:57,979 INFO L124 PetriNetUnfolderBase]: 4060/6066 cut-off events. [2024-06-20 16:23:57,979 INFO L125 PetriNetUnfolderBase]: For 306456/306460 co-relation queries the response was YES. [2024-06-20 16:23:58,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53105 conditions, 6066 events. 4060/6066 cut-off events. For 306456/306460 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32057 event pairs, 1117 based on Foata normal form. 10/6070 useless extension candidates. Maximal degree in co-relation 53001. Up to 5741 conditions per place. [2024-06-20 16:23:58,037 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 445 selfloop transitions, 59 changer transitions 0/509 dead transitions. [2024-06-20 16:23:58,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 509 transitions, 8088 flow [2024-06-20 16:23:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:23:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:23:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-20 16:23:58,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-20 16:23:58,038 INFO L175 Difference]: Start difference. First operand has 234 places, 472 transitions, 6932 flow. Second operand 11 states and 196 transitions. [2024-06-20 16:23:58,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 509 transitions, 8088 flow [2024-06-20 16:23:58,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 509 transitions, 7718 flow, removed 143 selfloop flow, removed 6 redundant places. [2024-06-20 16:23:58,490 INFO L231 Difference]: Finished difference. Result has 239 places, 472 transitions, 6695 flow [2024-06-20 16:23:58,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6695, PETRI_PLACES=239, PETRI_TRANSITIONS=472} [2024-06-20 16:23:58,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-20 16:23:58,491 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 472 transitions, 6695 flow [2024-06-20 16:23:58,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:58,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:23:58,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:23:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:23:58,491 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)] === [2024-06-20 16:23:58,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:23:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash -919898499, now seen corresponding path program 1 times [2024-06-20 16:23:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:23:58,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949952479] [2024-06-20 16:23:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:23:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:23:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:23:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:23:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:23:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949952479] [2024-06-20 16:23:59,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949952479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:23:59,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:23:59,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:23:59,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457948763] [2024-06-20 16:23:59,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:23:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:23:59,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:23:59,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:23:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:23:59,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:23:59,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 472 transitions, 6695 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:23:59,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:23:59,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:23:59,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:01,221 INFO L124 PetriNetUnfolderBase]: 4132/6166 cut-off events. [2024-06-20 16:24:01,221 INFO L125 PetriNetUnfolderBase]: For 314544/314554 co-relation queries the response was YES. [2024-06-20 16:24:01,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53546 conditions, 6166 events. 4132/6166 cut-off events. For 314544/314554 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32717 event pairs, 1063 based on Foata normal form. 10/6170 useless extension candidates. Maximal degree in co-relation 53440. Up to 5621 conditions per place. [2024-06-20 16:24:01,290 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 445 selfloop transitions, 84 changer transitions 0/534 dead transitions. [2024-06-20 16:24:01,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 534 transitions, 8559 flow [2024-06-20 16:24:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:24:01,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-20 16:24:01,291 INFO L175 Difference]: Start difference. First operand has 239 places, 472 transitions, 6695 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:24:01,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 534 transitions, 8559 flow [2024-06-20 16:24:01,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 534 transitions, 8457 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:01,688 INFO L231 Difference]: Finished difference. Result has 241 places, 492 transitions, 7094 flow [2024-06-20 16:24:01,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6593, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7094, PETRI_PLACES=241, PETRI_TRANSITIONS=492} [2024-06-20 16:24:01,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:24:01,689 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 492 transitions, 7094 flow [2024-06-20 16:24:01,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:01,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:24:01,690 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)] === [2024-06-20 16:24:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -919905443, now seen corresponding path program 3 times [2024-06-20 16:24:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172838848] [2024-06-20 16:24:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:02,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:02,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172838848] [2024-06-20 16:24:02,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172838848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:02,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905027509] [2024-06-20 16:24:02,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:02,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:02,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 492 transitions, 7094 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:02,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:02,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:02,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:04,412 INFO L124 PetriNetUnfolderBase]: 4173/6233 cut-off events. [2024-06-20 16:24:04,412 INFO L125 PetriNetUnfolderBase]: For 331939/331951 co-relation queries the response was YES. [2024-06-20 16:24:04,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55219 conditions, 6233 events. 4173/6233 cut-off events. For 331939/331951 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33257 event pairs, 980 based on Foata normal form. 12/6239 useless extension candidates. Maximal degree in co-relation 55111. Up to 5049 conditions per place. [2024-06-20 16:24:04,495 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 385 selfloop transitions, 182 changer transitions 0/572 dead transitions. [2024-06-20 16:24:04,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 572 transitions, 9242 flow [2024-06-20 16:24:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 16:24:04,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-20 16:24:04,497 INFO L175 Difference]: Start difference. First operand has 241 places, 492 transitions, 7094 flow. Second operand 10 states and 203 transitions. [2024-06-20 16:24:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 572 transitions, 9242 flow [2024-06-20 16:24:05,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 572 transitions, 8852 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-20 16:24:05,017 INFO L231 Difference]: Finished difference. Result has 242 places, 496 transitions, 7209 flow [2024-06-20 16:24:05,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6722, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7209, PETRI_PLACES=242, PETRI_TRANSITIONS=496} [2024-06-20 16:24:05,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 16:24:05,018 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 496 transitions, 7209 flow [2024-06-20 16:24:05,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:05,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:05,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:24:05,018 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)] === [2024-06-20 16:24:05,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash -920083197, now seen corresponding path program 6 times [2024-06-20 16:24:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031632337] [2024-06-20 16:24:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031632337] [2024-06-20 16:24:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031632337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:06,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466490980] [2024-06-20 16:24:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:06,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 496 transitions, 7209 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:06,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:06,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:06,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:07,787 INFO L124 PetriNetUnfolderBase]: 4178/6240 cut-off events. [2024-06-20 16:24:07,787 INFO L125 PetriNetUnfolderBase]: For 347380/347394 co-relation queries the response was YES. [2024-06-20 16:24:07,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56178 conditions, 6240 events. 4178/6240 cut-off events. For 347380/347394 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33081 event pairs, 1078 based on Foata normal form. 14/6248 useless extension candidates. Maximal degree in co-relation 56073. Up to 5880 conditions per place. [2024-06-20 16:24:07,859 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 448 selfloop transitions, 78 changer transitions 0/531 dead transitions. [2024-06-20 16:24:07,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 531 transitions, 8537 flow [2024-06-20 16:24:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:24:07,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 16:24:07,861 INFO L175 Difference]: Start difference. First operand has 242 places, 496 transitions, 7209 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:24:07,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 531 transitions, 8537 flow [2024-06-20 16:24:08,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 531 transitions, 8080 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:08,345 INFO L231 Difference]: Finished difference. Result has 244 places, 498 transitions, 7013 flow [2024-06-20 16:24:08,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6752, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7013, PETRI_PLACES=244, PETRI_TRANSITIONS=498} [2024-06-20 16:24:08,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 16:24:08,346 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 498 transitions, 7013 flow [2024-06-20 16:24:08,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:08,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:08,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:08,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:24:08,346 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)] === [2024-06-20 16:24:08,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -920078423, now seen corresponding path program 4 times [2024-06-20 16:24:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621509228] [2024-06-20 16:24:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621509228] [2024-06-20 16:24:09,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621509228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:09,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:09,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366831486] [2024-06-20 16:24:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:09,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:09,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 498 transitions, 7013 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:09,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:09,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:09,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:10,946 INFO L124 PetriNetUnfolderBase]: 4226/6312 cut-off events. [2024-06-20 16:24:10,946 INFO L125 PetriNetUnfolderBase]: For 366589/366603 co-relation queries the response was YES. [2024-06-20 16:24:11,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56239 conditions, 6312 events. 4226/6312 cut-off events. For 366589/366603 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33694 event pairs, 1002 based on Foata normal form. 12/6318 useless extension candidates. Maximal degree in co-relation 56133. Up to 5128 conditions per place. [2024-06-20 16:24:11,034 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 403 selfloop transitions, 170 changer transitions 0/578 dead transitions. [2024-06-20 16:24:11,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 578 transitions, 9252 flow [2024-06-20 16:24:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-20 16:24:11,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-20 16:24:11,035 INFO L175 Difference]: Start difference. First operand has 244 places, 498 transitions, 7013 flow. Second operand 10 states and 204 transitions. [2024-06-20 16:24:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 578 transitions, 9252 flow [2024-06-20 16:24:11,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 578 transitions, 9009 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:11,525 INFO L231 Difference]: Finished difference. Result has 246 places, 502 transitions, 7243 flow [2024-06-20 16:24:11,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7243, PETRI_PLACES=246, PETRI_TRANSITIONS=502} [2024-06-20 16:24:11,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-20 16:24:11,528 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 502 transitions, 7243 flow [2024-06-20 16:24:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:11,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:11,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:11,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:24:11,528 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:11,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash -920083073, now seen corresponding path program 5 times [2024-06-20 16:24:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:11,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251111319] [2024-06-20 16:24:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251111319] [2024-06-20 16:24:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251111319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103265471] [2024-06-20 16:24:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:12,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 502 transitions, 7243 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:14,288 INFO L124 PetriNetUnfolderBase]: 4286/6397 cut-off events. [2024-06-20 16:24:14,289 INFO L125 PetriNetUnfolderBase]: For 388086/388102 co-relation queries the response was YES. [2024-06-20 16:24:14,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58537 conditions, 6397 events. 4286/6397 cut-off events. For 388086/388102 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34240 event pairs, 1007 based on Foata normal form. 12/6403 useless extension candidates. Maximal degree in co-relation 58430. Up to 5112 conditions per place. [2024-06-20 16:24:14,369 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 404 selfloop transitions, 183 changer transitions 0/592 dead transitions. [2024-06-20 16:24:14,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 592 transitions, 9736 flow [2024-06-20 16:24:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:24:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:24:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-20 16:24:14,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-20 16:24:14,370 INFO L175 Difference]: Start difference. First operand has 246 places, 502 transitions, 7243 flow. Second operand 11 states and 224 transitions. [2024-06-20 16:24:14,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 592 transitions, 9736 flow [2024-06-20 16:24:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 592 transitions, 9306 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:15,002 INFO L231 Difference]: Finished difference. Result has 251 places, 510 transitions, 7434 flow [2024-06-20 16:24:15,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7434, PETRI_PLACES=251, PETRI_TRANSITIONS=510} [2024-06-20 16:24:15,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-20 16:24:15,003 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 510 transitions, 7434 flow [2024-06-20 16:24:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:15,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:24:15,004 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)] === [2024-06-20 16:24:15,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1763874165, now seen corresponding path program 1 times [2024-06-20 16:24:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747374772] [2024-06-20 16:24:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:15,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747374772] [2024-06-20 16:24:15,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747374772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:15,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:15,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:15,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331256087] [2024-06-20 16:24:15,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:15,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:15,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:15,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:15,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:15,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:24:15,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 510 transitions, 7434 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:15,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:15,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:24:15,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:16,844 INFO L124 PetriNetUnfolderBase]: 4059/6128 cut-off events. [2024-06-20 16:24:16,844 INFO L125 PetriNetUnfolderBase]: For 400849/400946 co-relation queries the response was YES. [2024-06-20 16:24:16,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57371 conditions, 6128 events. 4059/6128 cut-off events. For 400849/400946 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 33295 event pairs, 1073 based on Foata normal form. 9/6101 useless extension candidates. Maximal degree in co-relation 57262. Up to 5742 conditions per place. [2024-06-20 16:24:16,919 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 42 changer transitions 0/528 dead transitions. [2024-06-20 16:24:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 528 transitions, 8594 flow [2024-06-20 16:24:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-20 16:24:16,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:24:16,920 INFO L175 Difference]: Start difference. First operand has 251 places, 510 transitions, 7434 flow. Second operand 7 states and 133 transitions. [2024-06-20 16:24:16,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 528 transitions, 8594 flow [2024-06-20 16:24:17,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 528 transitions, 8205 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:17,521 INFO L231 Difference]: Finished difference. Result has 251 places, 510 transitions, 7146 flow [2024-06-20 16:24:17,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7146, PETRI_PLACES=251, PETRI_TRANSITIONS=510} [2024-06-20 16:24:17,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-20 16:24:17,522 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 510 transitions, 7146 flow [2024-06-20 16:24:17,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:17,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:17,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:17,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:24:17,523 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:17,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1494419479, now seen corresponding path program 7 times [2024-06-20 16:24:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:17,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416805765] [2024-06-20 16:24:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416805765] [2024-06-20 16:24:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416805765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030231419] [2024-06-20 16:24:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:18,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:18,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:18,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:18,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:18,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 510 transitions, 7146 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:18,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:18,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:20,209 INFO L124 PetriNetUnfolderBase]: 4294/6415 cut-off events. [2024-06-20 16:24:20,209 INFO L125 PetriNetUnfolderBase]: For 419470/419485 co-relation queries the response was YES. [2024-06-20 16:24:20,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59308 conditions, 6415 events. 4294/6415 cut-off events. For 419470/419485 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 34397 event pairs, 914 based on Foata normal form. 14/6423 useless extension candidates. Maximal degree in co-relation 59197. Up to 5668 conditions per place. [2024-06-20 16:24:20,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 120 changer transitions 0/555 dead transitions. [2024-06-20 16:24:20,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 555 transitions, 8764 flow [2024-06-20 16:24:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:24:20,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:24:20,293 INFO L175 Difference]: Start difference. First operand has 251 places, 510 transitions, 7146 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:24:20,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 555 transitions, 8764 flow [2024-06-20 16:24:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 555 transitions, 8650 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:20,971 INFO L231 Difference]: Finished difference. Result has 254 places, 514 transitions, 7439 flow [2024-06-20 16:24:20,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7032, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7439, PETRI_PLACES=254, PETRI_TRANSITIONS=514} [2024-06-20 16:24:20,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-20 16:24:20,972 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 514 transitions, 7439 flow [2024-06-20 16:24:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:20,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:20,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:24:20,972 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)] === [2024-06-20 16:24:20,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1494359029, now seen corresponding path program 8 times [2024-06-20 16:24:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:20,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810113125] [2024-06-20 16:24:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810113125] [2024-06-20 16:24:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810113125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:22,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:22,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913681719] [2024-06-20 16:24:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:22,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:22,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:22,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 514 transitions, 7439 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:22,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:22,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:22,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:23,907 INFO L124 PetriNetUnfolderBase]: 4276/6394 cut-off events. [2024-06-20 16:24:23,907 INFO L125 PetriNetUnfolderBase]: For 423716/423724 co-relation queries the response was YES. [2024-06-20 16:24:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59595 conditions, 6394 events. 4276/6394 cut-off events. For 423716/423724 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34300 event pairs, 1123 based on Foata normal form. 10/6398 useless extension candidates. Maximal degree in co-relation 59483. Up to 5920 conditions per place. [2024-06-20 16:24:23,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 90 changer transitions 0/552 dead transitions. [2024-06-20 16:24:23,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 552 transitions, 8739 flow [2024-06-20 16:24:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:24:23,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-20 16:24:23,978 INFO L175 Difference]: Start difference. First operand has 254 places, 514 transitions, 7439 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:24:23,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 552 transitions, 8739 flow [2024-06-20 16:24:24,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 552 transitions, 8303 flow, removed 128 selfloop flow, removed 8 redundant places. [2024-06-20 16:24:24,641 INFO L231 Difference]: Finished difference. Result has 256 places, 514 transitions, 7211 flow [2024-06-20 16:24:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7003, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7211, PETRI_PLACES=256, PETRI_TRANSITIONS=514} [2024-06-20 16:24:24,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-20 16:24:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 514 transitions, 7211 flow [2024-06-20 16:24:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:24,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:24:24,642 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)] === [2024-06-20 16:24:24,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -930781427, now seen corresponding path program 6 times [2024-06-20 16:24:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523384825] [2024-06-20 16:24:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:25,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:25,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523384825] [2024-06-20 16:24:25,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523384825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:25,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:25,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490286944] [2024-06-20 16:24:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:25,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 514 transitions, 7211 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:27,353 INFO L124 PetriNetUnfolderBase]: 4680/6970 cut-off events. [2024-06-20 16:24:27,353 INFO L125 PetriNetUnfolderBase]: For 416764/416774 co-relation queries the response was YES. [2024-06-20 16:24:27,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63544 conditions, 6970 events. 4680/6970 cut-off events. For 416764/416774 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37745 event pairs, 1083 based on Foata normal form. 12/6969 useless extension candidates. Maximal degree in co-relation 63432. Up to 5670 conditions per place. [2024-06-20 16:24:27,429 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 421 selfloop transitions, 202 changer transitions 0/628 dead transitions. [2024-06-20 16:24:27,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 628 transitions, 10298 flow [2024-06-20 16:24:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 16:24:27,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-20 16:24:27,430 INFO L175 Difference]: Start difference. First operand has 256 places, 514 transitions, 7211 flow. Second operand 10 states and 202 transitions. [2024-06-20 16:24:27,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 628 transitions, 10298 flow [2024-06-20 16:24:27,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 628 transitions, 10012 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 16:24:27,967 INFO L231 Difference]: Finished difference. Result has 258 places, 571 transitions, 8447 flow [2024-06-20 16:24:27,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8447, PETRI_PLACES=258, PETRI_TRANSITIONS=571} [2024-06-20 16:24:27,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 16:24:27,968 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 571 transitions, 8447 flow [2024-06-20 16:24:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:27,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:27,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:24:27,969 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)] === [2024-06-20 16:24:27,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash -927984917, now seen corresponding path program 7 times [2024-06-20 16:24:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:27,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705560415] [2024-06-20 16:24:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:27,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:29,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705560415] [2024-06-20 16:24:29,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705560415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:29,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:29,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:29,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356939159] [2024-06-20 16:24:29,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:29,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:29,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:29,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:29,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 571 transitions, 8447 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:29,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:29,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:29,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:30,762 INFO L124 PetriNetUnfolderBase]: 4686/6968 cut-off events. [2024-06-20 16:24:30,762 INFO L125 PetriNetUnfolderBase]: For 400993/401005 co-relation queries the response was YES. [2024-06-20 16:24:30,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64648 conditions, 6968 events. 4686/6968 cut-off events. For 400993/401005 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37604 event pairs, 1117 based on Foata normal form. 12/6968 useless extension candidates. Maximal degree in co-relation 64534. Up to 6021 conditions per place. [2024-06-20 16:24:30,845 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 467 selfloop transitions, 164 changer transitions 0/636 dead transitions. [2024-06-20 16:24:30,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 636 transitions, 10682 flow [2024-06-20 16:24:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:24:30,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:24:30,846 INFO L175 Difference]: Start difference. First operand has 258 places, 571 transitions, 8447 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:24:30,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 636 transitions, 10682 flow [2024-06-20 16:24:31,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 636 transitions, 10240 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:31,518 INFO L231 Difference]: Finished difference. Result has 263 places, 583 transitions, 8733 flow [2024-06-20 16:24:31,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8733, PETRI_PLACES=263, PETRI_TRANSITIONS=583} [2024-06-20 16:24:31,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-20 16:24:31,519 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 583 transitions, 8733 flow [2024-06-20 16:24:31,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:31,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:31,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:31,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:24:31,519 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)] === [2024-06-20 16:24:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -812693747, now seen corresponding path program 8 times [2024-06-20 16:24:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:31,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774075258] [2024-06-20 16:24:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:32,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774075258] [2024-06-20 16:24:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774075258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:32,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:32,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270659352] [2024-06-20 16:24:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:32,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:32,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 583 transitions, 8733 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:32,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:34,225 INFO L124 PetriNetUnfolderBase]: 4780/7110 cut-off events. [2024-06-20 16:24:34,226 INFO L125 PetriNetUnfolderBase]: For 422964/422980 co-relation queries the response was YES. [2024-06-20 16:24:34,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66416 conditions, 7110 events. 4780/7110 cut-off events. For 422964/422980 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38448 event pairs, 1050 based on Foata normal form. 12/7116 useless extension candidates. Maximal degree in co-relation 66300. Up to 5447 conditions per place. [2024-06-20 16:24:34,322 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 399 selfloop transitions, 242 changer transitions 0/646 dead transitions. [2024-06-20 16:24:34,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 646 transitions, 11196 flow [2024-06-20 16:24:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:24:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:24:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 16:24:34,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-20 16:24:34,323 INFO L175 Difference]: Start difference. First operand has 263 places, 583 transitions, 8733 flow. Second operand 10 states and 203 transitions. [2024-06-20 16:24:34,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 646 transitions, 11196 flow [2024-06-20 16:24:34,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 646 transitions, 10922 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:34,970 INFO L231 Difference]: Finished difference. Result has 268 places, 591 transitions, 9246 flow [2024-06-20 16:24:34,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8459, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9246, PETRI_PLACES=268, PETRI_TRANSITIONS=591} [2024-06-20 16:24:34,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-20 16:24:34,971 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 591 transitions, 9246 flow [2024-06-20 16:24:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:34,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:34,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:34,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:24:34,971 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)] === [2024-06-20 16:24:34,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1376271349, now seen corresponding path program 9 times [2024-06-20 16:24:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:34,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298096515] [2024-06-20 16:24:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:36,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:36,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298096515] [2024-06-20 16:24:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298096515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:36,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115774452] [2024-06-20 16:24:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:36,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:36,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:36,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:36,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 591 transitions, 9246 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:36,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:36,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:36,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:37,899 INFO L124 PetriNetUnfolderBase]: 4787/7125 cut-off events. [2024-06-20 16:24:37,899 INFO L125 PetriNetUnfolderBase]: For 446358/446374 co-relation queries the response was YES. [2024-06-20 16:24:37,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68645 conditions, 7125 events. 4787/7125 cut-off events. For 446358/446374 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38691 event pairs, 1147 based on Foata normal form. 14/7133 useless extension candidates. Maximal degree in co-relation 68526. Up to 6721 conditions per place. [2024-06-20 16:24:37,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 539 selfloop transitions, 80 changer transitions 0/624 dead transitions. [2024-06-20 16:24:37,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 624 transitions, 10803 flow [2024-06-20 16:24:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:24:37,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:24:37,978 INFO L175 Difference]: Start difference. First operand has 268 places, 591 transitions, 9246 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:24:37,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 624 transitions, 10803 flow [2024-06-20 16:24:38,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 624 transitions, 10385 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:38,504 INFO L231 Difference]: Finished difference. Result has 271 places, 593 transitions, 9118 flow [2024-06-20 16:24:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8832, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9118, PETRI_PLACES=271, PETRI_TRANSITIONS=593} [2024-06-20 16:24:38,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 16:24:38,505 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 593 transitions, 9118 flow [2024-06-20 16:24:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:38,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:38,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:24:38,505 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)] === [2024-06-20 16:24:38,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:38,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1376086651, now seen corresponding path program 2 times [2024-06-20 16:24:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:38,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692749107] [2024-06-20 16:24:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:39,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692749107] [2024-06-20 16:24:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692749107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:39,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096092599] [2024-06-20 16:24:39,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:39,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:39,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:39,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:39,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 593 transitions, 9118 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:24:39,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:39,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:39,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:41,145 INFO L124 PetriNetUnfolderBase]: 4819/7169 cut-off events. [2024-06-20 16:24:41,145 INFO L125 PetriNetUnfolderBase]: For 441805/441819 co-relation queries the response was YES. [2024-06-20 16:24:41,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68327 conditions, 7169 events. 4819/7169 cut-off events. For 441805/441819 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39052 event pairs, 1148 based on Foata normal form. 10/7173 useless extension candidates. Maximal degree in co-relation 68206. Up to 6579 conditions per place. [2024-06-20 16:24:41,244 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 540 selfloop transitions, 88 changer transitions 0/633 dead transitions. [2024-06-20 16:24:41,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 633 transitions, 10976 flow [2024-06-20 16:24:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-20 16:24:41,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-20 16:24:41,245 INFO L175 Difference]: Start difference. First operand has 271 places, 593 transitions, 9118 flow. Second operand 8 states and 159 transitions. [2024-06-20 16:24:41,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 633 transitions, 10976 flow [2024-06-20 16:24:41,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 633 transitions, 10718 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:41,785 INFO L231 Difference]: Finished difference. Result has 272 places, 596 transitions, 9164 flow [2024-06-20 16:24:41,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8860, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9164, PETRI_PLACES=272, PETRI_TRANSITIONS=596} [2024-06-20 16:24:41,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-20 16:24:41,786 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 596 transitions, 9164 flow [2024-06-20 16:24:41,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:24:41,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:41,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:24:41,786 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:41,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1376093595, now seen corresponding path program 9 times [2024-06-20 16:24:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:41,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241589] [2024-06-20 16:24:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:42,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:42,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241589] [2024-06-20 16:24:42,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:42,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:42,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289923290] [2024-06-20 16:24:42,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:42,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 596 transitions, 9164 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:42,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:42,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:42,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:44,647 INFO L124 PetriNetUnfolderBase]: 4829/7189 cut-off events. [2024-06-20 16:24:44,647 INFO L125 PetriNetUnfolderBase]: For 451497/451513 co-relation queries the response was YES. [2024-06-20 16:24:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68854 conditions, 7189 events. 4829/7189 cut-off events. For 451497/451513 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39080 event pairs, 998 based on Foata normal form. 12/7195 useless extension candidates. Maximal degree in co-relation 68732. Up to 5731 conditions per place. [2024-06-20 16:24:44,737 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 403 selfloop transitions, 240 changer transitions 0/648 dead transitions. [2024-06-20 16:24:44,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 648 transitions, 11198 flow [2024-06-20 16:24:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-20 16:24:44,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-20 16:24:44,739 INFO L175 Difference]: Start difference. First operand has 272 places, 596 transitions, 9164 flow. Second operand 9 states and 181 transitions. [2024-06-20 16:24:44,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 648 transitions, 11198 flow [2024-06-20 16:24:45,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 648 transitions, 10936 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:45,450 INFO L231 Difference]: Finished difference. Result has 275 places, 600 transitions, 9533 flow [2024-06-20 16:24:45,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9533, PETRI_PLACES=275, PETRI_TRANSITIONS=600} [2024-06-20 16:24:45,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-20 16:24:45,451 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 600 transitions, 9533 flow [2024-06-20 16:24:45,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:45,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:45,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:45,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:24:45,451 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:24:45,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -666881163, now seen corresponding path program 2 times [2024-06-20 16:24:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:45,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403720118] [2024-06-20 16:24:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:46,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:46,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403720118] [2024-06-20 16:24:46,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403720118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:46,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:46,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:46,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841219723] [2024-06-20 16:24:46,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:46,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:46,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:46,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:24:46,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 600 transitions, 9533 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:46,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:46,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:24:46,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:47,563 INFO L124 PetriNetUnfolderBase]: 4613/6935 cut-off events. [2024-06-20 16:24:47,563 INFO L125 PetriNetUnfolderBase]: For 465336/465464 co-relation queries the response was YES. [2024-06-20 16:24:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68351 conditions, 6935 events. 4613/6935 cut-off events. For 465336/465464 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38492 event pairs, 1114 based on Foata normal form. 2/6899 useless extension candidates. Maximal degree in co-relation 68228. Up to 6532 conditions per place. [2024-06-20 16:24:47,656 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 544 selfloop transitions, 45 changer transitions 0/619 dead transitions. [2024-06-20 16:24:47,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 619 transitions, 10979 flow [2024-06-20 16:24:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:47,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-20 16:24:47,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:24:47,657 INFO L175 Difference]: Start difference. First operand has 275 places, 600 transitions, 9533 flow. Second operand 6 states and 115 transitions. [2024-06-20 16:24:47,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 619 transitions, 10979 flow [2024-06-20 16:24:48,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 619 transitions, 10405 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:48,375 INFO L231 Difference]: Finished difference. Result has 274 places, 605 transitions, 9185 flow [2024-06-20 16:24:48,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8969, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9185, PETRI_PLACES=274, PETRI_TRANSITIONS=605} [2024-06-20 16:24:48,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-20 16:24:48,375 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 605 transitions, 9185 flow [2024-06-20 16:24:48,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:48,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:48,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:48,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:24:48,376 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)] === [2024-06-20 16:24:48,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -595744315, now seen corresponding path program 3 times [2024-06-20 16:24:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:48,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888101746] [2024-06-20 16:24:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:49,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:49,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888101746] [2024-06-20 16:24:49,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888101746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:49,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:49,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:49,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889383353] [2024-06-20 16:24:49,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:49,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:49,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:49,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:49,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 605 transitions, 9185 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:24:49,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:49,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:49,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:50,924 INFO L124 PetriNetUnfolderBase]: 4857/7235 cut-off events. [2024-06-20 16:24:50,924 INFO L125 PetriNetUnfolderBase]: For 484647/484653 co-relation queries the response was YES. [2024-06-20 16:24:50,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69409 conditions, 7235 events. 4857/7235 cut-off events. For 484647/484653 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39505 event pairs, 1425 based on Foata normal form. 6/7235 useless extension candidates. Maximal degree in co-relation 69285. Up to 6840 conditions per place. [2024-06-20 16:24:51,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 587 selfloop transitions, 48 changer transitions 0/640 dead transitions. [2024-06-20 16:24:51,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 640 transitions, 10961 flow [2024-06-20 16:24:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:24:51,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 16:24:51,029 INFO L175 Difference]: Start difference. First operand has 274 places, 605 transitions, 9185 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:24:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 640 transitions, 10961 flow [2024-06-20 16:24:51,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 640 transitions, 10862 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:51,625 INFO L231 Difference]: Finished difference. Result has 278 places, 608 transitions, 9318 flow [2024-06-20 16:24:51,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9318, PETRI_PLACES=278, PETRI_TRANSITIONS=608} [2024-06-20 16:24:51,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-20 16:24:51,626 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 608 transitions, 9318 flow [2024-06-20 16:24:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:24:51,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:51,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:51,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:24:51,626 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)] === [2024-06-20 16:24:51,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1343572581, now seen corresponding path program 10 times [2024-06-20 16:24:51,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:51,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805987463] [2024-06-20 16:24:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:51,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805987463] [2024-06-20 16:24:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805987463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:52,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:52,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16444893] [2024-06-20 16:24:52,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:52,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:52,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:52,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:52,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 608 transitions, 9318 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:52,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:52,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:52,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:54,313 INFO L124 PetriNetUnfolderBase]: 4893/7287 cut-off events. [2024-06-20 16:24:54,313 INFO L125 PetriNetUnfolderBase]: For 491562/491568 co-relation queries the response was YES. [2024-06-20 16:24:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70396 conditions, 7287 events. 4893/7287 cut-off events. For 491562/491568 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 39831 event pairs, 1422 based on Foata normal form. 6/7287 useless extension candidates. Maximal degree in co-relation 70272. Up to 6645 conditions per place. [2024-06-20 16:24:54,408 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 570 selfloop transitions, 81 changer transitions 0/656 dead transitions. [2024-06-20 16:24:54,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 656 transitions, 11307 flow [2024-06-20 16:24:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:24:54,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 16:24:54,417 INFO L175 Difference]: Start difference. First operand has 278 places, 608 transitions, 9318 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:24:54,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 656 transitions, 11307 flow [2024-06-20 16:24:55,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 656 transitions, 11107 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:55,046 INFO L231 Difference]: Finished difference. Result has 281 places, 612 transitions, 9447 flow [2024-06-20 16:24:55,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9447, PETRI_PLACES=281, PETRI_TRANSITIONS=612} [2024-06-20 16:24:55,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-20 16:24:55,046 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 612 transitions, 9447 flow [2024-06-20 16:24:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:55,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:55,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:55,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:24:55,046 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)] === [2024-06-20 16:24:55,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1343399601, now seen corresponding path program 11 times [2024-06-20 16:24:55,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:55,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376556162] [2024-06-20 16:24:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:55,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:56,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:56,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376556162] [2024-06-20 16:24:56,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376556162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:56,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:56,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134082202] [2024-06-20 16:24:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:56,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:56,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:56,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 612 transitions, 9447 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:56,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:56,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:56,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:57,841 INFO L124 PetriNetUnfolderBase]: 4929/7339 cut-off events. [2024-06-20 16:24:57,841 INFO L125 PetriNetUnfolderBase]: For 513503/513511 co-relation queries the response was YES. [2024-06-20 16:24:57,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71738 conditions, 7339 events. 4929/7339 cut-off events. For 513503/513511 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40194 event pairs, 1425 based on Foata normal form. 6/7339 useless extension candidates. Maximal degree in co-relation 71613. Up to 6697 conditions per place. [2024-06-20 16:24:57,943 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 570 selfloop transitions, 82 changer transitions 0/657 dead transitions. [2024-06-20 16:24:57,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 657 transitions, 11482 flow [2024-06-20 16:24:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:24:57,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 16:24:57,945 INFO L175 Difference]: Start difference. First operand has 281 places, 612 transitions, 9447 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:24:57,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 657 transitions, 11482 flow [2024-06-20 16:24:58,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 657 transitions, 11187 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:58,717 INFO L231 Difference]: Finished difference. Result has 283 places, 616 transitions, 9491 flow [2024-06-20 16:24:58,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9152, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9491, PETRI_PLACES=283, PETRI_TRANSITIONS=616} [2024-06-20 16:24:58,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 16:24:58,718 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 616 transitions, 9491 flow [2024-06-20 16:24:58,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:58,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:58,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:58,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:24:58,718 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)] === [2024-06-20 16:24:58,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -595928889, now seen corresponding path program 12 times [2024-06-20 16:24:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586297897] [2024-06-20 16:24:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:58,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:59,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586297897] [2024-06-20 16:24:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586297897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:59,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:24:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135991979] [2024-06-20 16:24:59,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:59,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:24:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:24:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:24:59,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:24:59,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 616 transitions, 9491 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:59,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:59,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:24:59,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:01,477 INFO L124 PetriNetUnfolderBase]: 4989/7425 cut-off events. [2024-06-20 16:25:01,478 INFO L125 PetriNetUnfolderBase]: For 540328/540338 co-relation queries the response was YES. [2024-06-20 16:25:01,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73424 conditions, 7425 events. 4989/7425 cut-off events. For 540328/540338 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40716 event pairs, 1431 based on Foata normal form. 6/7425 useless extension candidates. Maximal degree in co-relation 73298. Up to 6611 conditions per place. [2024-06-20 16:25:01,579 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 571 selfloop transitions, 90 changer transitions 0/666 dead transitions. [2024-06-20 16:25:01,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 666 transitions, 11926 flow [2024-06-20 16:25:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-20 16:25:01,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 16:25:01,580 INFO L175 Difference]: Start difference. First operand has 283 places, 616 transitions, 9491 flow. Second operand 9 states and 175 transitions. [2024-06-20 16:25:01,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 666 transitions, 11926 flow [2024-06-20 16:25:02,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 666 transitions, 11621 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:02,515 INFO L231 Difference]: Finished difference. Result has 286 places, 624 transitions, 9699 flow [2024-06-20 16:25:02,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9699, PETRI_PLACES=286, PETRI_TRANSITIONS=624} [2024-06-20 16:25:02,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-20 16:25:02,516 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 624 transitions, 9699 flow [2024-06-20 16:25:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:02,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:02,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:25:02,516 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:02,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1343394827, now seen corresponding path program 10 times [2024-06-20 16:25:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106336476] [2024-06-20 16:25:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:03,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:03,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106336476] [2024-06-20 16:25:03,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106336476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:03,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:03,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476382804] [2024-06-20 16:25:03,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:03,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:03,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:03,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 624 transitions, 9699 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:03,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:03,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:03,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:05,501 INFO L124 PetriNetUnfolderBase]: 4981/7413 cut-off events. [2024-06-20 16:25:05,501 INFO L125 PetriNetUnfolderBase]: For 554683/554693 co-relation queries the response was YES. [2024-06-20 16:25:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73713 conditions, 7413 events. 4981/7413 cut-off events. For 554683/554693 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40646 event pairs, 1457 based on Foata normal form. 4/7411 useless extension candidates. Maximal degree in co-relation 73585. Up to 7166 conditions per place. [2024-06-20 16:25:05,616 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 622 selfloop transitions, 26 changer transitions 0/653 dead transitions. [2024-06-20 16:25:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 653 transitions, 11286 flow [2024-06-20 16:25:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:25:05,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 16:25:05,617 INFO L175 Difference]: Start difference. First operand has 286 places, 624 transitions, 9699 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:25:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 653 transitions, 11286 flow [2024-06-20 16:25:06,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 653 transitions, 10996 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:06,437 INFO L231 Difference]: Finished difference. Result has 290 places, 626 transitions, 9602 flow [2024-06-20 16:25:06,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9602, PETRI_PLACES=290, PETRI_TRANSITIONS=626} [2024-06-20 16:25:06,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-20 16:25:06,438 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 626 transitions, 9602 flow [2024-06-20 16:25:06,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:06,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:06,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:06,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:25:06,439 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:06,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:06,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1571480675, now seen corresponding path program 4 times [2024-06-20 16:25:06,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:06,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819025883] [2024-06-20 16:25:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:06,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819025883] [2024-06-20 16:25:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819025883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:07,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:07,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679816359] [2024-06-20 16:25:07,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:07,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:07,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:07,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:07,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:07,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 626 transitions, 9602 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:25:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:07,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:09,093 INFO L124 PetriNetUnfolderBase]: 5009/7457 cut-off events. [2024-06-20 16:25:09,093 INFO L125 PetriNetUnfolderBase]: For 571877/571887 co-relation queries the response was YES. [2024-06-20 16:25:09,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74009 conditions, 7457 events. 5009/7457 cut-off events. For 571877/571887 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40966 event pairs, 1446 based on Foata normal form. 6/7457 useless extension candidates. Maximal degree in co-relation 73879. Up to 7172 conditions per place. [2024-06-20 16:25:09,199 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 622 selfloop transitions, 29 changer transitions 0/656 dead transitions. [2024-06-20 16:25:09,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 656 transitions, 11304 flow [2024-06-20 16:25:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:25:09,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:25:09,200 INFO L175 Difference]: Start difference. First operand has 290 places, 626 transitions, 9602 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:25:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 656 transitions, 11304 flow [2024-06-20 16:25:10,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 656 transitions, 11129 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:10,098 INFO L231 Difference]: Finished difference. Result has 291 places, 629 transitions, 9637 flow [2024-06-20 16:25:10,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9427, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9637, PETRI_PLACES=291, PETRI_TRANSITIONS=629} [2024-06-20 16:25:10,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-20 16:25:10,098 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 629 transitions, 9637 flow [2024-06-20 16:25:10,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-20 16:25:10,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:10,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:25:10,099 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)] === [2024-06-20 16:25:10,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1005312177, now seen corresponding path program 13 times [2024-06-20 16:25:10,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:10,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294521855] [2024-06-20 16:25:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:10,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294521855] [2024-06-20 16:25:11,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294521855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:11,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:11,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397324435] [2024-06-20 16:25:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:11,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:11,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 629 transitions, 9637 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:11,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:11,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:11,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:12,916 INFO L124 PetriNetUnfolderBase]: 5013/7463 cut-off events. [2024-06-20 16:25:12,917 INFO L125 PetriNetUnfolderBase]: For 583316/583326 co-relation queries the response was YES. [2024-06-20 16:25:12,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74164 conditions, 7463 events. 5013/7463 cut-off events. For 583316/583326 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41056 event pairs, 1435 based on Foata normal form. 6/7463 useless extension candidates. Maximal degree in co-relation 74033. Up to 7120 conditions per place. [2024-06-20 16:25:13,027 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 624 selfloop transitions, 38 changer transitions 0/667 dead transitions. [2024-06-20 16:25:13,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 667 transitions, 11442 flow [2024-06-20 16:25:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:25:13,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-20 16:25:13,028 INFO L175 Difference]: Start difference. First operand has 291 places, 629 transitions, 9637 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:25:13,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 667 transitions, 11442 flow [2024-06-20 16:25:13,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 667 transitions, 11260 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:13,914 INFO L231 Difference]: Finished difference. Result has 294 places, 633 transitions, 9701 flow [2024-06-20 16:25:13,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9455, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9701, PETRI_PLACES=294, PETRI_TRANSITIONS=633} [2024-06-20 16:25:13,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-20 16:25:13,915 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 633 transitions, 9701 flow [2024-06-20 16:25:13,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:13,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:13,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:25:13,916 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)] === [2024-06-20 16:25:13,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1005549513, now seen corresponding path program 1 times [2024-06-20 16:25:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:13,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053515607] [2024-06-20 16:25:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053515607] [2024-06-20 16:25:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053515607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:14,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:14,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:14,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28708344] [2024-06-20 16:25:14,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:14,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:14,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 633 transitions, 9701 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:14,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:14,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:14,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:16,612 INFO L124 PetriNetUnfolderBase]: 5013/7468 cut-off events. [2024-06-20 16:25:16,612 INFO L125 PetriNetUnfolderBase]: For 598432/598432 co-relation queries the response was YES. [2024-06-20 16:25:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74271 conditions, 7468 events. 5013/7468 cut-off events. For 598432/598432 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41015 event pairs, 1431 based on Foata normal form. 3/7470 useless extension candidates. Maximal degree in co-relation 74139. Up to 7113 conditions per place. [2024-06-20 16:25:16,733 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 615 selfloop transitions, 47 changer transitions 0/667 dead transitions. [2024-06-20 16:25:16,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 667 transitions, 11507 flow [2024-06-20 16:25:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-20 16:25:16,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-20 16:25:16,735 INFO L175 Difference]: Start difference. First operand has 294 places, 633 transitions, 9701 flow. Second operand 8 states and 151 transitions. [2024-06-20 16:25:16,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 667 transitions, 11507 flow [2024-06-20 16:25:17,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 667 transitions, 11304 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:17,562 INFO L231 Difference]: Finished difference. Result has 295 places, 637 transitions, 9785 flow [2024-06-20 16:25:17,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9498, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9785, PETRI_PLACES=295, PETRI_TRANSITIONS=637} [2024-06-20 16:25:17,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 16:25:17,563 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 637 transitions, 9785 flow [2024-06-20 16:25:17,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:17,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:17,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:17,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:25:17,563 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)] === [2024-06-20 16:25:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1005549761, now seen corresponding path program 5 times [2024-06-20 16:25:17,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:17,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034327506] [2024-06-20 16:25:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034327506] [2024-06-20 16:25:18,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034327506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:18,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:18,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662994137] [2024-06-20 16:25:18,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:18,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:18,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 637 transitions, 9785 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:18,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:18,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:18,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:20,280 INFO L124 PetriNetUnfolderBase]: 5041/7512 cut-off events. [2024-06-20 16:25:20,280 INFO L125 PetriNetUnfolderBase]: For 623545/623545 co-relation queries the response was YES. [2024-06-20 16:25:20,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75216 conditions, 7512 events. 5041/7512 cut-off events. For 623545/623545 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41336 event pairs, 1436 based on Foata normal form. 6/7517 useless extension candidates. Maximal degree in co-relation 75083. Up to 7162 conditions per place. [2024-06-20 16:25:20,382 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 622 selfloop transitions, 41 changer transitions 0/668 dead transitions. [2024-06-20 16:25:20,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 668 transitions, 11547 flow [2024-06-20 16:25:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:25:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-20 16:25:20,383 INFO L175 Difference]: Start difference. First operand has 295 places, 637 transitions, 9785 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:25:20,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 668 transitions, 11547 flow [2024-06-20 16:25:21,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 668 transitions, 11316 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:21,351 INFO L231 Difference]: Finished difference. Result has 297 places, 640 transitions, 9804 flow [2024-06-20 16:25:21,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9554, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9804, PETRI_PLACES=297, PETRI_TRANSITIONS=640} [2024-06-20 16:25:21,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:25:21,352 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 640 transitions, 9804 flow [2024-06-20 16:25:21,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:21,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:21,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:21,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:25:21,352 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)] === [2024-06-20 16:25:21,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1580051555, now seen corresponding path program 6 times [2024-06-20 16:25:21,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:21,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686009100] [2024-06-20 16:25:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:21,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:22,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686009100] [2024-06-20 16:25:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686009100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:22,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143603159] [2024-06-20 16:25:22,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:22,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:22,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:22,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:22,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 640 transitions, 9804 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:22,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:22,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:22,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:24,105 INFO L124 PetriNetUnfolderBase]: 5044/7517 cut-off events. [2024-06-20 16:25:24,105 INFO L125 PetriNetUnfolderBase]: For 639044/639044 co-relation queries the response was YES. [2024-06-20 16:25:24,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75473 conditions, 7517 events. 5044/7517 cut-off events. For 639044/639044 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41371 event pairs, 1419 based on Foata normal form. 6/7522 useless extension candidates. Maximal degree in co-relation 75339. Up to 7213 conditions per place. [2024-06-20 16:25:24,226 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 634 selfloop transitions, 29 changer transitions 0/668 dead transitions. [2024-06-20 16:25:24,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 668 transitions, 11532 flow [2024-06-20 16:25:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:25:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:25:24,226 INFO L175 Difference]: Start difference. First operand has 297 places, 640 transitions, 9804 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:25:24,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 668 transitions, 11532 flow [2024-06-20 16:25:25,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 668 transitions, 11306 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:25,274 INFO L231 Difference]: Finished difference. Result has 299 places, 643 transitions, 9806 flow [2024-06-20 16:25:25,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9586, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9806, PETRI_PLACES=299, PETRI_TRANSITIONS=643} [2024-06-20 16:25:25,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:25:25,275 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 643 transitions, 9806 flow [2024-06-20 16:25:25,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:25,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:25,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:25:25,275 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:25,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2026727183, now seen corresponding path program 3 times [2024-06-20 16:25:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907273501] [2024-06-20 16:25:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907273501] [2024-06-20 16:25:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907273501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:25,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:25,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:25:25,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413338443] [2024-06-20 16:25:25,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:25,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:25:25,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:25:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:25:25,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-20 16:25:25,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 643 transitions, 9806 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:25,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:25,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-20 16:25:25,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:27,520 INFO L124 PetriNetUnfolderBase]: 4788/7224 cut-off events. [2024-06-20 16:25:27,520 INFO L125 PetriNetUnfolderBase]: For 627314/627417 co-relation queries the response was YES. [2024-06-20 16:25:27,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72685 conditions, 7224 events. 4788/7224 cut-off events. For 627314/627417 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40819 event pairs, 1386 based on Foata normal form. 27/7230 useless extension candidates. Maximal degree in co-relation 72550. Up to 6843 conditions per place. [2024-06-20 16:25:27,623 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 603 selfloop transitions, 14 changer transitions 0/651 dead transitions. [2024-06-20 16:25:27,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 651 transitions, 11076 flow [2024-06-20 16:25:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:27,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:25:27,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:25:27,624 INFO L175 Difference]: Start difference. First operand has 299 places, 643 transitions, 9806 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:25:27,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 651 transitions, 11076 flow [2024-06-20 16:25:28,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 651 transitions, 10858 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:28,467 INFO L231 Difference]: Finished difference. Result has 299 places, 643 transitions, 9624 flow [2024-06-20 16:25:28,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9588, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9624, PETRI_PLACES=299, PETRI_TRANSITIONS=643} [2024-06-20 16:25:28,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:25:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 643 transitions, 9624 flow [2024-06-20 16:25:28,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:28,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:28,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:25:28,468 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1686575623, now seen corresponding path program 1 times [2024-06-20 16:25:28,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:28,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626292653] [2024-06-20 16:25:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:29,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626292653] [2024-06-20 16:25:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626292653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:29,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:25:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922948543] [2024-06-20 16:25:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:25:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:25:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:25:29,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:29,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 643 transitions, 9624 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:25:29,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:29,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:29,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:30,816 INFO L124 PetriNetUnfolderBase]: 5037/7508 cut-off events. [2024-06-20 16:25:30,816 INFO L125 PetriNetUnfolderBase]: For 632169/632169 co-relation queries the response was YES. [2024-06-20 16:25:30,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74599 conditions, 7508 events. 5037/7508 cut-off events. For 632169/632169 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41363 event pairs, 1444 based on Foata normal form. 3/7510 useless extension candidates. Maximal degree in co-relation 74463. Up to 7264 conditions per place. [2024-06-20 16:25:30,930 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 628 selfloop transitions, 25 changer transitions 0/658 dead transitions. [2024-06-20 16:25:30,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 658 transitions, 11143 flow [2024-06-20 16:25:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:25:30,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:25:30,931 INFO L175 Difference]: Start difference. First operand has 299 places, 643 transitions, 9624 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:25:30,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 658 transitions, 11143 flow [2024-06-20 16:25:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 658 transitions, 11089 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:31,765 INFO L231 Difference]: Finished difference. Result has 300 places, 646 transitions, 9676 flow [2024-06-20 16:25:31,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9570, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9676, PETRI_PLACES=300, PETRI_TRANSITIONS=646} [2024-06-20 16:25:31,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-20 16:25:31,766 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 646 transitions, 9676 flow [2024-06-20 16:25:31,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:25:31,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:31,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:31,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:25:31,766 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:31,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-20 16:25:31,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003619786] [2024-06-20 16:25:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003619786] [2024-06-20 16:25:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003619786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:32,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:32,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:25:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25528740] [2024-06-20 16:25:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:25:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:25:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:25:32,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:32,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 646 transitions, 9676 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:25:32,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:32,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:32,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:34,085 INFO L124 PetriNetUnfolderBase]: 5002/7455 cut-off events. [2024-06-20 16:25:34,086 INFO L125 PetriNetUnfolderBase]: For 645734/645740 co-relation queries the response was YES. [2024-06-20 16:25:34,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74615 conditions, 7455 events. 5002/7455 cut-off events. For 645734/645740 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41025 event pairs, 1455 based on Foata normal form. 3/7457 useless extension candidates. Maximal degree in co-relation 74478. Up to 7213 conditions per place. [2024-06-20 16:25:34,196 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 623 selfloop transitions, 26 changer transitions 0/654 dead transitions. [2024-06-20 16:25:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 654 transitions, 11010 flow [2024-06-20 16:25:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 16:25:34,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:25:34,197 INFO L175 Difference]: Start difference. First operand has 300 places, 646 transitions, 9676 flow. Second operand 6 states and 108 transitions. [2024-06-20 16:25:34,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 654 transitions, 11010 flow [2024-06-20 16:25:35,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 654 transitions, 10956 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:35,064 INFO L231 Difference]: Finished difference. Result has 302 places, 646 transitions, 9680 flow [2024-06-20 16:25:35,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9622, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9680, PETRI_PLACES=302, PETRI_TRANSITIONS=646} [2024-06-20 16:25:35,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 16:25:35,065 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 646 transitions, 9680 flow [2024-06-20 16:25:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 16:25:35,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:35,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:25:35,065 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2043694165, now seen corresponding path program 1 times [2024-06-20 16:25:35,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:35,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820248416] [2024-06-20 16:25:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820248416] [2024-06-20 16:25:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820248416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493857612] [2024-06-20 16:25:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:35,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:35,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:35,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:35,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 646 transitions, 9680 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:35,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:35,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:35,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:37,585 INFO L124 PetriNetUnfolderBase]: 4908/7323 cut-off events. [2024-06-20 16:25:37,586 INFO L125 PetriNetUnfolderBase]: For 677559/677657 co-relation queries the response was YES. [2024-06-20 16:25:37,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74073 conditions, 7323 events. 4908/7323 cut-off events. For 677559/677657 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40443 event pairs, 1466 based on Foata normal form. 28/7330 useless extension candidates. Maximal degree in co-relation 73935. Up to 7043 conditions per place. [2024-06-20 16:25:37,705 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 613 selfloop transitions, 15 changer transitions 0/660 dead transitions. [2024-06-20 16:25:37,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 660 transitions, 11012 flow [2024-06-20 16:25:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:25:37,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:25:37,706 INFO L175 Difference]: Start difference. First operand has 302 places, 646 transitions, 9680 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:25:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 660 transitions, 11012 flow [2024-06-20 16:25:38,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 660 transitions, 10944 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:38,628 INFO L231 Difference]: Finished difference. Result has 304 places, 649 transitions, 9688 flow [2024-06-20 16:25:38,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9688, PETRI_PLACES=304, PETRI_TRANSITIONS=649} [2024-06-20 16:25:38,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-20 16:25:38,628 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 649 transitions, 9688 flow [2024-06-20 16:25:38,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:38,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:38,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:38,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:25:38,628 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)] === [2024-06-20 16:25:38,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1967157399, now seen corresponding path program 1 times [2024-06-20 16:25:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:38,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26484674] [2024-06-20 16:25:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:38,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26484674] [2024-06-20 16:25:39,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26484674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:39,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:39,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258997514] [2024-06-20 16:25:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:39,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:39,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:39,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 649 transitions, 9688 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-20 16:25:39,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:39,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:39,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:41,600 INFO L124 PetriNetUnfolderBase]: 5611/8361 cut-off events. [2024-06-20 16:25:41,601 INFO L125 PetriNetUnfolderBase]: For 897963/897986 co-relation queries the response was YES. [2024-06-20 16:25:41,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91936 conditions, 8361 events. 5611/8361 cut-off events. For 897963/897986 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47274 event pairs, 1037 based on Foata normal form. 30/8358 useless extension candidates. Maximal degree in co-relation 91797. Up to 5223 conditions per place. [2024-06-20 16:25:41,728 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 535 selfloop transitions, 188 changer transitions 0/728 dead transitions. [2024-06-20 16:25:41,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 728 transitions, 12934 flow [2024-06-20 16:25:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:25:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:25:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-20 16:25:41,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-20 16:25:41,729 INFO L175 Difference]: Start difference. First operand has 304 places, 649 transitions, 9688 flow. Second operand 11 states and 230 transitions. [2024-06-20 16:25:41,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 728 transitions, 12934 flow [2024-06-20 16:25:43,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 728 transitions, 12880 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:43,344 INFO L231 Difference]: Finished difference. Result has 313 places, 657 transitions, 10478 flow [2024-06-20 16:25:43,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10478, PETRI_PLACES=313, PETRI_TRANSITIONS=657} [2024-06-20 16:25:43,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-20 16:25:43,345 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 657 transitions, 10478 flow [2024-06-20 16:25:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-20 16:25:43,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:43,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:25:43,345 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:43,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1897644999, now seen corresponding path program 2 times [2024-06-20 16:25:43,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:43,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447889476] [2024-06-20 16:25:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:43,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:44,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447889476] [2024-06-20 16:25:44,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447889476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:44,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:44,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:25:44,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884187141] [2024-06-20 16:25:44,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:44,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:25:44,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:25:44,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:25:44,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:44,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 657 transitions, 10478 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:25:44,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:44,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:44,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:47,270 INFO L124 PetriNetUnfolderBase]: 6433/9673 cut-off events. [2024-06-20 16:25:47,270 INFO L125 PetriNetUnfolderBase]: For 1209140/1209155 co-relation queries the response was YES. [2024-06-20 16:25:47,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116208 conditions, 9673 events. 6433/9673 cut-off events. For 1209140/1209155 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 57110 event pairs, 1576 based on Foata normal form. 46/9702 useless extension candidates. Maximal degree in co-relation 116065. Up to 6734 conditions per place. [2024-06-20 16:25:47,403 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 541 selfloop transitions, 224 changer transitions 0/770 dead transitions. [2024-06-20 16:25:47,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 770 transitions, 14495 flow [2024-06-20 16:25:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:25:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:25:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 288 transitions. [2024-06-20 16:25:47,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-20 16:25:47,405 INFO L175 Difference]: Start difference. First operand has 313 places, 657 transitions, 10478 flow. Second operand 14 states and 288 transitions. [2024-06-20 16:25:47,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 770 transitions, 14495 flow [2024-06-20 16:25:48,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 770 transitions, 14042 flow, removed 147 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:49,007 INFO L231 Difference]: Finished difference. Result has 325 places, 671 transitions, 11307 flow [2024-06-20 16:25:49,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11307, PETRI_PLACES=325, PETRI_TRANSITIONS=671} [2024-06-20 16:25:49,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-20 16:25:49,007 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 671 transitions, 11307 flow [2024-06-20 16:25:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:25:49,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:49,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:25:49,008 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:49,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 287759379, now seen corresponding path program 3 times [2024-06-20 16:25:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873948083] [2024-06-20 16:25:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:49,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873948083] [2024-06-20 16:25:49,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873948083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:49,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:49,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:25:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058374497] [2024-06-20 16:25:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:49,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:25:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:25:49,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:25:50,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:50,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 671 transitions, 11307 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:25:50,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:50,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:53,279 INFO L124 PetriNetUnfolderBase]: 6778/10230 cut-off events. [2024-06-20 16:25:53,279 INFO L125 PetriNetUnfolderBase]: For 1377243/1377253 co-relation queries the response was YES. [2024-06-20 16:25:53,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126361 conditions, 10230 events. 6778/10230 cut-off events. For 1377243/1377253 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 61465 event pairs, 1894 based on Foata normal form. 42/10255 useless extension candidates. Maximal degree in co-relation 126214. Up to 7937 conditions per place. [2024-06-20 16:25:53,461 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 554 selfloop transitions, 216 changer transitions 0/775 dead transitions. [2024-06-20 16:25:53,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 775 transitions, 15022 flow [2024-06-20 16:25:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 16:25:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 16:25:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 303 transitions. [2024-06-20 16:25:53,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-20 16:25:53,462 INFO L175 Difference]: Start difference. First operand has 325 places, 671 transitions, 11307 flow. Second operand 15 states and 303 transitions. [2024-06-20 16:25:53,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 775 transitions, 15022 flow [2024-06-20 16:25:56,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 775 transitions, 14625 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-20 16:25:56,342 INFO L231 Difference]: Finished difference. Result has 332 places, 677 transitions, 11726 flow [2024-06-20 16:25:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10910, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11726, PETRI_PLACES=332, PETRI_TRANSITIONS=677} [2024-06-20 16:25:56,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:25:56,343 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 677 transitions, 11726 flow [2024-06-20 16:25:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:25:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:56,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:25:56,344 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:25:56,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1009187169, now seen corresponding path program 4 times [2024-06-20 16:25:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682427517] [2024-06-20 16:25:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:57,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:57,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682427517] [2024-06-20 16:25:57,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682427517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:57,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:57,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:25:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940505187] [2024-06-20 16:25:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:57,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:25:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:25:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:25:57,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:25:57,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 677 transitions, 11726 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:25:57,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:57,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:25:57,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:01,113 INFO L124 PetriNetUnfolderBase]: 6766/10222 cut-off events. [2024-06-20 16:26:01,113 INFO L125 PetriNetUnfolderBase]: For 1349638/1349648 co-relation queries the response was YES. [2024-06-20 16:26:01,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124447 conditions, 10222 events. 6766/10222 cut-off events. For 1349638/1349648 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 61387 event pairs, 1999 based on Foata normal form. 50/10255 useless extension candidates. Maximal degree in co-relation 124297. Up to 8558 conditions per place. [2024-06-20 16:26:01,264 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 543 selfloop transitions, 227 changer transitions 0/775 dead transitions. [2024-06-20 16:26:01,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 775 transitions, 14942 flow [2024-06-20 16:26:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-20 16:26:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-20 16:26:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 317 transitions. [2024-06-20 16:26:01,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47172619047619047 [2024-06-20 16:26:01,265 INFO L175 Difference]: Start difference. First operand has 332 places, 677 transitions, 11726 flow. Second operand 16 states and 317 transitions. [2024-06-20 16:26:01,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 775 transitions, 14942 flow [2024-06-20 16:26:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 775 transitions, 14599 flow, removed 67 selfloop flow, removed 10 redundant places. [2024-06-20 16:26:03,816 INFO L231 Difference]: Finished difference. Result has 338 places, 679 transitions, 12008 flow [2024-06-20 16:26:03,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11383, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=12008, PETRI_PLACES=338, PETRI_TRANSITIONS=679} [2024-06-20 16:26:03,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-20 16:26:03,817 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 679 transitions, 12008 flow [2024-06-20 16:26:03,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:03,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:03,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:03,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:26:03,818 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:03,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2120398697, now seen corresponding path program 5 times [2024-06-20 16:26:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:03,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059549965] [2024-06-20 16:26:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:05,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059549965] [2024-06-20 16:26:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059549965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:05,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323786597] [2024-06-20 16:26:05,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:05,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:05,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:05,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:05,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 679 transitions, 12008 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:05,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:05,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:05,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:09,177 INFO L124 PetriNetUnfolderBase]: 8187/12462 cut-off events. [2024-06-20 16:26:09,177 INFO L125 PetriNetUnfolderBase]: For 1751845/1751847 co-relation queries the response was YES. [2024-06-20 16:26:09,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161549 conditions, 12462 events. 8187/12462 cut-off events. For 1751845/1751847 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 78825 event pairs, 2410 based on Foata normal form. 42/12503 useless extension candidates. Maximal degree in co-relation 161397. Up to 9401 conditions per place. [2024-06-20 16:26:09,361 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 616 selfloop transitions, 151 changer transitions 0/772 dead transitions. [2024-06-20 16:26:09,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 772 transitions, 15790 flow [2024-06-20 16:26:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:26:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:26:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-20 16:26:09,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-20 16:26:09,362 INFO L175 Difference]: Start difference. First operand has 338 places, 679 transitions, 12008 flow. Second operand 12 states and 243 transitions. [2024-06-20 16:26:09,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 772 transitions, 15790 flow [2024-06-20 16:26:12,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 772 transitions, 15250 flow, removed 84 selfloop flow, removed 12 redundant places. [2024-06-20 16:26:12,490 INFO L231 Difference]: Finished difference. Result has 340 places, 702 transitions, 12910 flow [2024-06-20 16:26:12,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11557, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12910, PETRI_PLACES=340, PETRI_TRANSITIONS=702} [2024-06-20 16:26:12,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-20 16:26:12,491 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 702 transitions, 12910 flow [2024-06-20 16:26:12,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:12,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:12,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:12,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:26:12,492 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:12,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:12,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2035407857, now seen corresponding path program 6 times [2024-06-20 16:26:12,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:12,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350861351] [2024-06-20 16:26:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:12,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:13,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:13,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350861351] [2024-06-20 16:26:13,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350861351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:13,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:13,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:13,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513947330] [2024-06-20 16:26:13,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:13,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:13,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:13,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:13,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 702 transitions, 12910 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:13,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:18,005 INFO L124 PetriNetUnfolderBase]: 8435/12877 cut-off events. [2024-06-20 16:26:18,005 INFO L125 PetriNetUnfolderBase]: For 1874743/1874745 co-relation queries the response was YES. [2024-06-20 16:26:18,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166601 conditions, 12877 events. 8435/12877 cut-off events. For 1874743/1874745 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 82351 event pairs, 2661 based on Foata normal form. 58/12934 useless extension candidates. Maximal degree in co-relation 166446. Up to 10341 conditions per place. [2024-06-20 16:26:18,210 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 627 selfloop transitions, 142 changer transitions 0/774 dead transitions. [2024-06-20 16:26:18,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 774 transitions, 16058 flow [2024-06-20 16:26:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:26:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:26:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-20 16:26:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-20 16:26:18,211 INFO L175 Difference]: Start difference. First operand has 340 places, 702 transitions, 12910 flow. Second operand 12 states and 237 transitions. [2024-06-20 16:26:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 774 transitions, 16058 flow [2024-06-20 16:26:21,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 774 transitions, 15760 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-20 16:26:21,370 INFO L231 Difference]: Finished difference. Result has 346 places, 712 transitions, 13479 flow [2024-06-20 16:26:21,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12614, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13479, PETRI_PLACES=346, PETRI_TRANSITIONS=712} [2024-06-20 16:26:21,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-20 16:26:21,370 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 712 transitions, 13479 flow [2024-06-20 16:26:21,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:21,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:21,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:21,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:26:21,371 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:21,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:21,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2118521027, now seen corresponding path program 7 times [2024-06-20 16:26:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:21,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159662360] [2024-06-20 16:26:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:21,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:22,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:22,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159662360] [2024-06-20 16:26:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159662360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883727399] [2024-06-20 16:26:22,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:22,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:22,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:22,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 712 transitions, 13479 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:22,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:22,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:22,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:27,069 INFO L124 PetriNetUnfolderBase]: 8455/12924 cut-off events. [2024-06-20 16:26:27,069 INFO L125 PetriNetUnfolderBase]: For 1849549/1849551 co-relation queries the response was YES. [2024-06-20 16:26:27,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164499 conditions, 12924 events. 8455/12924 cut-off events. For 1849549/1849551 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 82731 event pairs, 2814 based on Foata normal form. 74/12997 useless extension candidates. Maximal degree in co-relation 164341. Up to 11469 conditions per place. [2024-06-20 16:26:27,285 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 618 selfloop transitions, 151 changer transitions 0/774 dead transitions. [2024-06-20 16:26:27,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 774 transitions, 15972 flow [2024-06-20 16:26:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:26:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:26:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-20 16:26:27,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2024-06-20 16:26:27,286 INFO L175 Difference]: Start difference. First operand has 346 places, 712 transitions, 13479 flow. Second operand 13 states and 251 transitions. [2024-06-20 16:26:27,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 774 transitions, 15972 flow [2024-06-20 16:26:31,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 774 transitions, 15662 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-20 16:26:31,108 INFO L231 Difference]: Finished difference. Result has 351 places, 716 transitions, 13749 flow [2024-06-20 16:26:31,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13169, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13749, PETRI_PLACES=351, PETRI_TRANSITIONS=716} [2024-06-20 16:26:31,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 16:26:31,109 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 716 transitions, 13749 flow [2024-06-20 16:26:31,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:31,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:31,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:26:31,110 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:31,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1479800583, now seen corresponding path program 1 times [2024-06-20 16:26:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922667970] [2024-06-20 16:26:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:31,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922667970] [2024-06-20 16:26:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922667970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:32,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48083499] [2024-06-20 16:26:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:32,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:32,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 716 transitions, 13749 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:32,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:32,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:32,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:36,690 INFO L124 PetriNetUnfolderBase]: 8540/13050 cut-off events. [2024-06-20 16:26:36,690 INFO L125 PetriNetUnfolderBase]: For 1727041/1727051 co-relation queries the response was YES. [2024-06-20 16:26:36,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164792 conditions, 13050 events. 8540/13050 cut-off events. For 1727041/1727051 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 83656 event pairs, 2893 based on Foata normal form. 12/13061 useless extension candidates. Maximal degree in co-relation 164632. Up to 11590 conditions per place. [2024-06-20 16:26:37,076 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 538 selfloop transitions, 252 changer transitions 0/795 dead transitions. [2024-06-20 16:26:37,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 795 transitions, 16553 flow [2024-06-20 16:26:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-20 16:26:37,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-20 16:26:37,077 INFO L175 Difference]: Start difference. First operand has 351 places, 716 transitions, 13749 flow. Second operand 10 states and 202 transitions. [2024-06-20 16:26:37,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 795 transitions, 16553 flow [2024-06-20 16:26:40,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 795 transitions, 16172 flow, removed 50 selfloop flow, removed 11 redundant places. [2024-06-20 16:26:40,963 INFO L231 Difference]: Finished difference. Result has 351 places, 739 transitions, 14412 flow [2024-06-20 16:26:40,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13368, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14412, PETRI_PLACES=351, PETRI_TRANSITIONS=739} [2024-06-20 16:26:40,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-20 16:26:40,964 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 739 transitions, 14412 flow [2024-06-20 16:26:40,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:40,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:40,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:26:40,965 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:40,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1547703583, now seen corresponding path program 8 times [2024-06-20 16:26:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:40,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964551715] [2024-06-20 16:26:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:42,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964551715] [2024-06-20 16:26:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964551715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:42,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:42,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451798880] [2024-06-20 16:26:42,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:42,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:42,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 739 transitions, 14412 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:42,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:42,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:42,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:46,640 INFO L124 PetriNetUnfolderBase]: 8664/13254 cut-off events. [2024-06-20 16:26:46,641 INFO L125 PetriNetUnfolderBase]: For 1787931/1787941 co-relation queries the response was YES. [2024-06-20 16:26:46,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166386 conditions, 13254 events. 8664/13254 cut-off events. For 1787931/1787941 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 85502 event pairs, 2853 based on Foata normal form. 36/13289 useless extension candidates. Maximal degree in co-relation 166224. Up to 11814 conditions per place. [2024-06-20 16:26:46,838 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 629 selfloop transitions, 191 changer transitions 0/825 dead transitions. [2024-06-20 16:26:46,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 825 transitions, 17309 flow [2024-06-20 16:26:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:26:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:26:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-20 16:26:46,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48268398268398266 [2024-06-20 16:26:46,840 INFO L175 Difference]: Start difference. First operand has 351 places, 739 transitions, 14412 flow. Second operand 11 states and 223 transitions. [2024-06-20 16:26:46,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 825 transitions, 17309 flow [2024-06-20 16:26:50,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 825 transitions, 16814 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:50,520 INFO L231 Difference]: Finished difference. Result has 356 places, 741 transitions, 14484 flow [2024-06-20 16:26:50,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13931, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14484, PETRI_PLACES=356, PETRI_TRANSITIONS=741} [2024-06-20 16:26:50,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-20 16:26:50,520 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 741 transitions, 14484 flow [2024-06-20 16:26:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:50,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:50,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:26:50,521 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:26:50,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:50,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1547918785, now seen corresponding path program 2 times [2024-06-20 16:26:50,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:50,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735699528] [2024-06-20 16:26:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:50,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735699528] [2024-06-20 16:26:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735699528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:26:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536167492] [2024-06-20 16:26:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:51,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:26:51,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:51,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:26:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:26:51,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:26:51,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 741 transitions, 14484 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:51,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:51,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:26:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:56,018 INFO L124 PetriNetUnfolderBase]: 8730/13354 cut-off events. [2024-06-20 16:26:56,018 INFO L125 PetriNetUnfolderBase]: For 1799474/1799484 co-relation queries the response was YES. [2024-06-20 16:26:56,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168369 conditions, 13354 events. 8730/13354 cut-off events. For 1799474/1799484 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 86117 event pairs, 2893 based on Foata normal form. 12/13365 useless extension candidates. Maximal degree in co-relation 168206. Up to 11697 conditions per place. [2024-06-20 16:26:56,270 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 541 selfloop transitions, 267 changer transitions 0/813 dead transitions. [2024-06-20 16:26:56,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 813 transitions, 17793 flow [2024-06-20 16:26:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:26:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:26:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-20 16:26:56,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-20 16:26:56,271 INFO L175 Difference]: Start difference. First operand has 356 places, 741 transitions, 14484 flow. Second operand 10 states and 204 transitions. [2024-06-20 16:26:56,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 813 transitions, 17793 flow [2024-06-20 16:26:59,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 813 transitions, 17487 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 16:26:59,930 INFO L231 Difference]: Finished difference. Result has 361 places, 754 transitions, 15391 flow [2024-06-20 16:26:59,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14178, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15391, PETRI_PLACES=361, PETRI_TRANSITIONS=754} [2024-06-20 16:26:59,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-20 16:26:59,930 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 754 transitions, 15391 flow [2024-06-20 16:26:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:26:59,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:59,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:26:59,931 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)] === [2024-06-20 16:26:59,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1542347155, now seen corresponding path program 3 times [2024-06-20 16:26:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:59,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674678967] [2024-06-20 16:26:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:27:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:27:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:27:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674678967] [2024-06-20 16:27:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674678967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:27:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:27:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:27:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726294018] [2024-06-20 16:27:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:27:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:27:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:27:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:27:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:27:01,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:27:01,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 754 transitions, 15391 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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) [2024-06-20 16:27:01,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:27:01,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:27:01,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand