./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035.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/mix035.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix035.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix035.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-bcb38a6-m [2024-06-03 19:37:51,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:37:51,698 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:37:51,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:37:51,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:37:51,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:37:51,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:37:51,735 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:37:51,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:37:51,739 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:37:51,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:37:51,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:37:51,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:37:51,741 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:37:51,742 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:37:51,742 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:37:51,742 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:37:51,743 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:37:51,743 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:37:51,743 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:37:51,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:37:51,744 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:37:51,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:37:51,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:37:51,745 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:37:51,745 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:37:51,745 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:37:51,745 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:37:51,746 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:37:51,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:37:51,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:37:51,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:37:51,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:37:51,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:37:51,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:37:51,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:37:51,748 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:37:51,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:37:51,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:37:51,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:37:51,749 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:37:51,750 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:37:51,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:37:51,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:37:51,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:37:51,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:37:51,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:37:51,966 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:37:51,966 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:37:51,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix035.oepc.yml/witness.yml [2024-06-03 19:37:52,179 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:37:52,180 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:37:52,180 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-03 19:37:53,279 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:37:53,601 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:37:53,601 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-03 19:37:53,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b60d2c5/e444f77d9c8b4c09954e8f8c8d645846/FLAG9d447bc4f [2024-06-03 19:37:53,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80b60d2c5/e444f77d9c8b4c09954e8f8c8d645846 [2024-06-03 19:37:53,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:37:53,658 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:37:53,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:37:53,661 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:37:53,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:37:53,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:37:52" (1/2) ... [2024-06-03 19:37:53,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7035ae7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:37:53, skipping insertion in model container [2024-06-03 19:37:53,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:37:52" (1/2) ... [2024-06-03 19:37:53,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e6a1fe7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:37:53, skipping insertion in model container [2024-06-03 19:37:53,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:37:53" (2/2) ... [2024-06-03 19:37:53,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7035ae7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:53, skipping insertion in model container [2024-06-03 19:37:53,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:37:53" (2/2) ... [2024-06-03 19:37:53,672 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:37:53,769 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:37:53,770 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$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_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:37:53,771 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! 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$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:37:53,771 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$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_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:37:53,771 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:37:53,772 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-03 19:37:53,818 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:37:54,153 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:37:54,166 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:37:54,353 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:37:54,394 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:37:54,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54 WrapperNode [2024-06-03 19:37:54,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:37:54,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:37:54,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:37:54,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:37:54,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,474 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-03 19:37:54,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:37:54,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:37:54,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:37:54,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:37:54,498 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,516 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,544 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]. [2024-06-03 19:37:54,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,557 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:37:54,584 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:37:54,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:37:54,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:37:54,585 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (1/1) ... [2024-06-03 19:37:54,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:37:54,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:37:54,614 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) [2024-06-03 19:37:54,627 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 [2024-06-03 19:37:54,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:37:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:37:54,659 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:37:54,659 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:37:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:37:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:37:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:37:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:37:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:37:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:37:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:37:54,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:37:54,662 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:37:54,832 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:37:54,835 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:37:55,218 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:37:55,218 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:37:55,414 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:37:55,415 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:37:55,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:37:55 BoogieIcfgContainer [2024-06-03 19:37:55,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:37:55,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:37:55,419 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:37:55,421 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:37:55,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:37:52" (1/4) ... [2024-06-03 19:37:55,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b713774 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:37:55, skipping insertion in model container [2024-06-03 19:37:55,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:37:53" (2/4) ... [2024-06-03 19:37:55,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b713774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:37:55, skipping insertion in model container [2024-06-03 19:37:55,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:37:54" (3/4) ... [2024-06-03 19:37:55,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b713774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:37:55, skipping insertion in model container [2024-06-03 19:37:55,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:37:55" (4/4) ... [2024-06-03 19:37:55,425 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035.oepc.i [2024-06-03 19:37:55,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:37:55,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:37:55,441 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:37:55,493 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:37:55,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:37:55,566 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:37:55,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:37:55,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:37:55,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:37:55,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:37:55,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:37:55,594 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;@30513955, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:37:55,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:37:55,600 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:37:55,601 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:37:55,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:37:55,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:55,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:37:55,602 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)] === [2024-06-03 19:37:55,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1094188686, now seen corresponding path program 1 times [2024-06-03 19:37:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:55,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958966823] [2024-06-03 19:37:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:57,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:57,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958966823] [2024-06-03 19:37:57,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958966823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:57,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:57,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:37:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457836876] [2024-06-03 19:37:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:57,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:37:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:57,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:37:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:37:57,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:37:57,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:57,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:57,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:37:57,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:57,772 INFO L124 PetriNetUnfolderBase]: 1286/2002 cut-off events. [2024-06-03 19:37:57,772 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 19:37:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4000 conditions, 2002 events. 1286/2002 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9736 event pairs, 892 based on Foata normal form. 1/1938 useless extension candidates. Maximal degree in co-relation 3985. Up to 1921 conditions per place. [2024-06-03 19:37:57,789 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:37:57,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 179 flow [2024-06-03 19:37:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:37:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:37:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-03 19:37:57,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-03 19:37:57,801 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 77 transitions. [2024-06-03 19:37:57,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 179 flow [2024-06-03 19:37:57,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:37:57,806 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:37:57,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:37:57,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:37:57,811 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:37:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:57,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:57,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:37:57,812 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)] === [2024-06-03 19:37:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 751697169, now seen corresponding path program 1 times [2024-06-03 19:37:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214943113] [2024-06-03 19:37:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214943113] [2024-06-03 19:37:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214943113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:58,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:58,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:37:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814827984] [2024-06-03 19:37:58,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:37:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:37:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:37:58,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:37:58,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:58,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:58,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:37:58,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:59,321 INFO L124 PetriNetUnfolderBase]: 1280/2001 cut-off events. [2024-06-03 19:37:59,321 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-03 19:37:59,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2001 events. 1280/2001 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9729 event pairs, 750 based on Foata normal form. 3/1972 useless extension candidates. Maximal degree in co-relation 4509. Up to 1897 conditions per place. [2024-06-03 19:37:59,334 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 19:37:59,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-03 19:37:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:37:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:37:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-03 19:37:59,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-03 19:37:59,337 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-03 19:37:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-03 19:37:59,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:37:59,339 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:37:59,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:37:59,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:37:59,340 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:37:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:59,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:59,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:59,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:37:59,341 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)] === [2024-06-03 19:37:59,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 826512560, now seen corresponding path program 1 times [2024-06-03 19:37:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035276729] [2024-06-03 19:37:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035276729] [2024-06-03 19:38:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035276729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:01,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001027087] [2024-06-03 19:38:01,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:01,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:01,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:01,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:01,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:01,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:01,792 INFO L124 PetriNetUnfolderBase]: 1552/2400 cut-off events. [2024-06-03 19:38:01,792 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-06-03 19:38:01,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 2400 events. 1552/2400 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11694 event pairs, 697 based on Foata normal form. 3/2365 useless extension candidates. Maximal degree in co-relation 5987. Up to 2262 conditions per place. [2024-06-03 19:38:01,810 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-03 19:38:01,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 380 flow [2024-06-03 19:38:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 19:38:01,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-03 19:38:01,816 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 138 transitions. [2024-06-03 19:38:01,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 380 flow [2024-06-03 19:38:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:01,821 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-03 19:38:01,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 19:38:01,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-03 19:38:01,833 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-03 19:38:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:01,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:01,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:01,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:38:01,834 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)] === [2024-06-03 19:38:01,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -147913140, now seen corresponding path program 1 times [2024-06-03 19:38:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:01,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181643183] [2024-06-03 19:38:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:03,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:03,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181643183] [2024-06-03 19:38:03,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181643183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:03,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:03,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389835191] [2024-06-03 19:38:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:03,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:03,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:03,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:03,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:03,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:03,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:03,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:04,600 INFO L124 PetriNetUnfolderBase]: 1543/2383 cut-off events. [2024-06-03 19:38:04,601 INFO L125 PetriNetUnfolderBase]: For 2475/2475 co-relation queries the response was YES. [2024-06-03 19:38:04,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6655 conditions, 2383 events. 1543/2383 cut-off events. For 2475/2475 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11566 event pairs, 534 based on Foata normal form. 6/2351 useless extension candidates. Maximal degree in co-relation 6636. Up to 2217 conditions per place. [2024-06-03 19:38:04,617 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-03 19:38:04,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 440 flow [2024-06-03 19:38:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 19:38:04,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149501661129569 [2024-06-03 19:38:04,620 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 155 transitions. [2024-06-03 19:38:04,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 440 flow [2024-06-03 19:38:04,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 412 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:04,626 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-03 19:38:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:38:04,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-03 19:38:04,628 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-03 19:38:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:04,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:04,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:04,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:38:04,629 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)] === [2024-06-03 19:38:04,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash -841682960, now seen corresponding path program 1 times [2024-06-03 19:38:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:04,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915332745] [2024-06-03 19:38:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:05,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:05,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915332745] [2024-06-03 19:38:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915332745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:05,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:05,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097683367] [2024-06-03 19:38:05,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:05,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:05,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:05,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:05,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:05,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:06,000 INFO L124 PetriNetUnfolderBase]: 1533/2403 cut-off events. [2024-06-03 19:38:06,000 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2024-06-03 19:38:06,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7072 conditions, 2403 events. 1533/2403 cut-off events. For 3736/3736 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11948 event pairs, 610 based on Foata normal form. 4/2397 useless extension candidates. Maximal degree in co-relation 7052. Up to 2260 conditions per place. [2024-06-03 19:38:06,014 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-03 19:38:06,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 379 flow [2024-06-03 19:38:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:38:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:38:06,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-03 19:38:06,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-03 19:38:06,016 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 98 transitions. [2024-06-03 19:38:06,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 379 flow [2024-06-03 19:38:06,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 340 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:06,026 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-03 19:38:06,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-03 19:38:06,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-03 19:38:06,029 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-03 19:38:06,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:06,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:06,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:06,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:38:06,034 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)] === [2024-06-03 19:38:06,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1409161457, now seen corresponding path program 1 times [2024-06-03 19:38:06,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:06,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857288208] [2024-06-03 19:38:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:06,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:07,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857288208] [2024-06-03 19:38:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857288208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082169836] [2024-06-03 19:38:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:07,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:07,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:07,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:07,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:07,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:07,747 INFO L124 PetriNetUnfolderBase]: 1571/2453 cut-off events. [2024-06-03 19:38:07,747 INFO L125 PetriNetUnfolderBase]: For 5193/5193 co-relation queries the response was YES. [2024-06-03 19:38:07,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7741 conditions, 2453 events. 1571/2453 cut-off events. For 5193/5193 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12120 event pairs, 574 based on Foata normal form. 4/2443 useless extension candidates. Maximal degree in co-relation 7719. Up to 2267 conditions per place. [2024-06-03 19:38:07,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-03 19:38:07,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 514 flow [2024-06-03 19:38:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:07,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:38:07,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:38:07,769 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:38:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 514 flow [2024-06-03 19:38:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 480 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:07,774 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 312 flow [2024-06-03 19:38:07,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-03 19:38:07,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-03 19:38:07,777 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 312 flow [2024-06-03 19:38:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:07,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:07,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:38:07,778 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)] === [2024-06-03 19:38:07,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1087960847, now seen corresponding path program 2 times [2024-06-03 19:38:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:07,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876017284] [2024-06-03 19:38:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:08,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:08,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876017284] [2024-06-03 19:38:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876017284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:08,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:08,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658621632] [2024-06-03 19:38:08,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:08,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:08,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:08,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:08,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:08,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:08,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:08,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:08,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:09,398 INFO L124 PetriNetUnfolderBase]: 1561/2442 cut-off events. [2024-06-03 19:38:09,398 INFO L125 PetriNetUnfolderBase]: For 7111/7111 co-relation queries the response was YES. [2024-06-03 19:38:09,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8435 conditions, 2442 events. 1561/2442 cut-off events. For 7111/7111 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12042 event pairs, 586 based on Foata normal form. 4/2434 useless extension candidates. Maximal degree in co-relation 8411. Up to 2292 conditions per place. [2024-06-03 19:38:09,415 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-03 19:38:09,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 494 flow [2024-06-03 19:38:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 19:38:09,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-03 19:38:09,417 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 312 flow. Second operand 6 states and 115 transitions. [2024-06-03 19:38:09,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 494 flow [2024-06-03 19:38:09,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 466 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-03 19:38:09,424 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 314 flow [2024-06-03 19:38:09,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-03 19:38:09,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-03 19:38:09,425 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 314 flow [2024-06-03 19:38:09,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:09,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:09,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:38:09,426 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)] === [2024-06-03 19:38:09,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1340550333, now seen corresponding path program 1 times [2024-06-03 19:38:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16326869] [2024-06-03 19:38:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:09,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16326869] [2024-06-03 19:38:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16326869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070217698] [2024-06-03 19:38:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:10,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:10,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 314 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:10,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:10,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:10,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:11,288 INFO L124 PetriNetUnfolderBase]: 1583/2466 cut-off events. [2024-06-03 19:38:11,289 INFO L125 PetriNetUnfolderBase]: For 8491/8491 co-relation queries the response was YES. [2024-06-03 19:38:11,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8667 conditions, 2466 events. 1583/2466 cut-off events. For 8491/8491 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12140 event pairs, 579 based on Foata normal form. 4/2454 useless extension candidates. Maximal degree in co-relation 8640. Up to 2303 conditions per place. [2024-06-03 19:38:11,302 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-03 19:38:11,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 572 flow [2024-06-03 19:38:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:38:11,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:38:11,306 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 314 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:38:11,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 572 flow [2024-06-03 19:38:11,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 536 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:11,312 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-03 19:38:11,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-03 19:38:11,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 19:38:11,313 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-03 19:38:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:11,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:11,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:38:11,314 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)] === [2024-06-03 19:38:11,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash -734331353, now seen corresponding path program 2 times [2024-06-03 19:38:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868487063] [2024-06-03 19:38:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868487063] [2024-06-03 19:38:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868487063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:12,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:12,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:12,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087181912] [2024-06-03 19:38:12,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:12,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:12,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:12,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:12,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:12,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:12,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:13,061 INFO L124 PetriNetUnfolderBase]: 1621/2518 cut-off events. [2024-06-03 19:38:13,062 INFO L125 PetriNetUnfolderBase]: For 10846/10846 co-relation queries the response was YES. [2024-06-03 19:38:13,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9470 conditions, 2518 events. 1621/2518 cut-off events. For 10846/10846 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12388 event pairs, 551 based on Foata normal form. 4/2504 useless extension candidates. Maximal degree in co-relation 9444. Up to 2261 conditions per place. [2024-06-03 19:38:13,079 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-03 19:38:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 688 flow [2024-06-03 19:38:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:38:13,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:38:13,082 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:38:13,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 688 flow [2024-06-03 19:38:13,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 646 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:13,091 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 428 flow [2024-06-03 19:38:13,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-03 19:38:13,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-03 19:38:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 428 flow [2024-06-03 19:38:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:38:13,093 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)] === [2024-06-03 19:38:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash 632952965, now seen corresponding path program 3 times [2024-06-03 19:38:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:13,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986915159] [2024-06-03 19:38:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:13,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:14,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:14,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986915159] [2024-06-03 19:38:14,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986915159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:14,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:14,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:14,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134703032] [2024-06-03 19:38:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:14,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:14,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:14,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:14,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:14,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:14,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:14,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:14,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:14,845 INFO L124 PetriNetUnfolderBase]: 1611/2507 cut-off events. [2024-06-03 19:38:14,845 INFO L125 PetriNetUnfolderBase]: For 13676/13676 co-relation queries the response was YES. [2024-06-03 19:38:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9963 conditions, 2507 events. 1611/2507 cut-off events. For 13676/13676 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12323 event pairs, 581 based on Foata normal form. 4/2495 useless extension candidates. Maximal degree in co-relation 9936. Up to 2342 conditions per place. [2024-06-03 19:38:14,862 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-03 19:38:14,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 652 flow [2024-06-03 19:38:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:38:14,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:38:14,864 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 428 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:38:14,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 652 flow [2024-06-03 19:38:14,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 596 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:14,878 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 408 flow [2024-06-03 19:38:14,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-06-03 19:38:14,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-03 19:38:14,880 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 408 flow [2024-06-03 19:38:14,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:14,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:14,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:14,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:38:14,881 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)] === [2024-06-03 19:38:14,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -556953569, now seen corresponding path program 1 times [2024-06-03 19:38:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795547484] [2024-06-03 19:38:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:16,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:16,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795547484] [2024-06-03 19:38:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795547484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:16,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:16,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:16,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203493135] [2024-06-03 19:38:16,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:16,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:16,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:16,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:38:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-03 19:38:16,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:16,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:38:16,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:16,929 INFO L124 PetriNetUnfolderBase]: 1962/2996 cut-off events. [2024-06-03 19:38:16,930 INFO L125 PetriNetUnfolderBase]: For 18161/18161 co-relation queries the response was YES. [2024-06-03 19:38:16,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11867 conditions, 2996 events. 1962/2996 cut-off events. For 18161/18161 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14251 event pairs, 723 based on Foata normal form. 4/2979 useless extension candidates. Maximal degree in co-relation 11838. Up to 2853 conditions per place. [2024-06-03 19:38:16,949 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-03 19:38:16,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 683 flow [2024-06-03 19:38:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:38:16,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:38:16,952 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 408 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:38:16,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 683 flow [2024-06-03 19:38:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 634 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:16,966 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 453 flow [2024-06-03 19:38:16,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=453, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-03 19:38:16,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-03 19:38:16,967 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 453 flow [2024-06-03 19:38:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-03 19:38:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:16,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:38:16,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:16,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1086485628, now seen corresponding path program 1 times [2024-06-03 19:38:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:16,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536281512] [2024-06-03 19:38:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:16,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536281512] [2024-06-03 19:38:17,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536281512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:17,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:17,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736778713] [2024-06-03 19:38:17,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:17,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:17,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:17,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:17,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 453 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) [2024-06-03 19:38:17,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:18,316 INFO L124 PetriNetUnfolderBase]: 1799/2819 cut-off events. [2024-06-03 19:38:18,317 INFO L125 PetriNetUnfolderBase]: For 20978/20984 co-relation queries the response was YES. [2024-06-03 19:38:18,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11784 conditions, 2819 events. 1799/2819 cut-off events. For 20978/20984 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13911 event pairs, 723 based on Foata normal form. 7/2821 useless extension candidates. Maximal degree in co-relation 11753. Up to 2667 conditions per place. [2024-06-03 19:38:18,337 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 68 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-03 19:38:18,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 645 flow [2024-06-03 19:38:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:38:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:38:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-03 19:38:18,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:38:18,339 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 453 flow. Second operand 5 states and 93 transitions. [2024-06-03 19:38:18,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 645 flow [2024-06-03 19:38:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 600 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:18,353 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 456 flow [2024-06-03 19:38:18,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-03 19:38:18,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-03 19:38:18,354 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 456 flow [2024-06-03 19:38:18,354 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) [2024-06-03 19:38:18,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:18,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:38:18,355 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)] === [2024-06-03 19:38:18,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1293243858, now seen corresponding path program 1 times [2024-06-03 19:38:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277357515] [2024-06-03 19:38:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:18,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:19,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277357515] [2024-06-03 19:38:19,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277357515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:19,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:19,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95981307] [2024-06-03 19:38:19,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:20,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:20,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 456 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:20,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:20,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:20,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:20,819 INFO L124 PetriNetUnfolderBase]: 1897/2929 cut-off events. [2024-06-03 19:38:20,819 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-03 19:38:20,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12651 conditions, 2929 events. 1897/2929 cut-off events. For 24175/24175 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14540 event pairs, 682 based on Foata normal form. 4/2926 useless extension candidates. Maximal degree in co-relation 12619. Up to 2693 conditions per place. [2024-06-03 19:38:20,839 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 94 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-03 19:38:20,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 123 transitions, 912 flow [2024-06-03 19:38:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:38:20,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:38:20,841 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 456 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:38:20,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 123 transitions, 912 flow [2024-06-03 19:38:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 886 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:20,864 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 558 flow [2024-06-03 19:38:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-03 19:38:20,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-03 19:38:20,865 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 558 flow [2024-06-03 19:38:20,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:20,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:20,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:38:20,867 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)] === [2024-06-03 19:38:20,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:20,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1293153648, now seen corresponding path program 2 times [2024-06-03 19:38:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761269727] [2024-06-03 19:38:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:20,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:22,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:22,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761269727] [2024-06-03 19:38:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761269727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630808737] [2024-06-03 19:38:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:22,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:22,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:22,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:22,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:22,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:23,108 INFO L124 PetriNetUnfolderBase]: 1887/2915 cut-off events. [2024-06-03 19:38:23,109 INFO L125 PetriNetUnfolderBase]: For 28078/28078 co-relation queries the response was YES. [2024-06-03 19:38:23,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13233 conditions, 2915 events. 1887/2915 cut-off events. For 28078/28078 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14443 event pairs, 684 based on Foata normal form. 4/2912 useless extension candidates. Maximal degree in co-relation 13200. Up to 2718 conditions per place. [2024-06-03 19:38:23,127 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-03 19:38:23,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 113 transitions, 854 flow [2024-06-03 19:38:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:38:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:38:23,129 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 558 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:38:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 113 transitions, 854 flow [2024-06-03 19:38:23,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 784 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:23,148 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 530 flow [2024-06-03 19:38:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=530, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-06-03 19:38:23,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-03 19:38:23,149 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 530 flow [2024-06-03 19:38:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:38:23,150 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)] === [2024-06-03 19:38:23,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 525217412, now seen corresponding path program 3 times [2024-06-03 19:38:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458498] [2024-06-03 19:38:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:24,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458498] [2024-06-03 19:38:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:24,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:24,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:24,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846345223] [2024-06-03 19:38:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:24,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:24,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:24,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:24,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:24,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:24,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:25,543 INFO L124 PetriNetUnfolderBase]: 1909/2944 cut-off events. [2024-06-03 19:38:25,544 INFO L125 PetriNetUnfolderBase]: For 31614/31614 co-relation queries the response was YES. [2024-06-03 19:38:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13596 conditions, 2944 events. 1909/2944 cut-off events. For 31614/31614 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14641 event pairs, 642 based on Foata normal form. 4/2942 useless extension candidates. Maximal degree in co-relation 13561. Up to 2654 conditions per place. [2024-06-03 19:38:25,561 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 78 selfloop transitions, 31 changer transitions 0/115 dead transitions. [2024-06-03 19:38:25,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 870 flow [2024-06-03 19:38:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:38:25,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:38:25,563 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 530 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:38:25,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 870 flow [2024-06-03 19:38:25,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 828 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:25,580 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 604 flow [2024-06-03 19:38:25,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-03 19:38:25,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-03 19:38:25,581 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 604 flow [2024-06-03 19:38:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:25,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:25,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:38:25,582 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:25,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1853293680, now seen corresponding path program 4 times [2024-06-03 19:38:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24782847] [2024-06-03 19:38:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:26,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:26,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24782847] [2024-06-03 19:38:26,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24782847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:26,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:26,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:26,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761689736] [2024-06-03 19:38:26,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:26,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:26,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:26,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:27,482 INFO L124 PetriNetUnfolderBase]: 1902/2940 cut-off events. [2024-06-03 19:38:27,483 INFO L125 PetriNetUnfolderBase]: For 35932/35932 co-relation queries the response was YES. [2024-06-03 19:38:27,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14168 conditions, 2940 events. 1902/2940 cut-off events. For 35932/35932 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14667 event pairs, 658 based on Foata normal form. 4/2937 useless extension candidates. Maximal degree in co-relation 14132. Up to 2694 conditions per place. [2024-06-03 19:38:27,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-03 19:38:27,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1168 flow [2024-06-03 19:38:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:38:27,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:38:27,504 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 604 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:38:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1168 flow [2024-06-03 19:38:27,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1076 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:27,529 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 736 flow [2024-06-03 19:38:27,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=736, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-03 19:38:27,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-03 19:38:27,530 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 736 flow [2024-06-03 19:38:27,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:27,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:27,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:27,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:38:27,531 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)] === [2024-06-03 19:38:27,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1244786950, now seen corresponding path program 1 times [2024-06-03 19:38:27,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:27,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250196068] [2024-06-03 19:38:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:27,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:28,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250196068] [2024-06-03 19:38:28,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250196068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:28,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:28,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086448542] [2024-06-03 19:38:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:28,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:29,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:38:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 736 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) [2024-06-03 19:38:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:29,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:38:29,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:29,771 INFO L124 PetriNetUnfolderBase]: 2063/3164 cut-off events. [2024-06-03 19:38:29,771 INFO L125 PetriNetUnfolderBase]: For 42559/42559 co-relation queries the response was YES. [2024-06-03 19:38:29,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15861 conditions, 3164 events. 2063/3164 cut-off events. For 42559/42559 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15207 event pairs, 1074 based on Foata normal form. 2/3164 useless extension candidates. Maximal degree in co-relation 15822. Up to 2993 conditions per place. [2024-06-03 19:38:29,791 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-06-03 19:38:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1054 flow [2024-06-03 19:38:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:38:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-03 19:38:29,796 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 736 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:38:29,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1054 flow [2024-06-03 19:38:29,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 965 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:29,846 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 752 flow [2024-06-03 19:38:29,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-03 19:38:29,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-03 19:38:29,847 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 752 flow [2024-06-03 19:38:29,847 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) [2024-06-03 19:38:29,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:29,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:29,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:38:29,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:29,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:29,849 INFO L85 PathProgramCache]: Analyzing trace with hash 692985106, now seen corresponding path program 1 times [2024-06-03 19:38:29,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:29,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484696335] [2024-06-03 19:38:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:29,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:30,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:30,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484696335] [2024-06-03 19:38:30,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484696335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:30,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782593240] [2024-06-03 19:38:30,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:30,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:30,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:38:30,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 752 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:30,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:38:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:31,451 INFO L124 PetriNetUnfolderBase]: 2140/3233 cut-off events. [2024-06-03 19:38:31,451 INFO L125 PetriNetUnfolderBase]: For 52883/52904 co-relation queries the response was YES. [2024-06-03 19:38:31,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 3233 events. 2140/3233 cut-off events. For 52883/52904 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15558 event pairs, 1173 based on Foata normal form. 8/3224 useless extension candidates. Maximal degree in co-relation 16903. Up to 3168 conditions per place. [2024-06-03 19:38:31,468 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 89 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2024-06-03 19:38:31,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 998 flow [2024-06-03 19:38:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:38:31,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:38:31,470 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 752 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:38:31,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 998 flow [2024-06-03 19:38:31,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 110 transitions, 954 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:31,505 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 768 flow [2024-06-03 19:38:31,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=768, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-03 19:38:31,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-03 19:38:31,506 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 768 flow [2024-06-03 19:38:31,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:31,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:31,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:31,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:38:31,507 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)] === [2024-06-03 19:38:31,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1994663196, now seen corresponding path program 1 times [2024-06-03 19:38:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:31,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035411143] [2024-06-03 19:38:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:31,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:32,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:32,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035411143] [2024-06-03 19:38:32,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035411143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:32,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:32,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:32,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679742858] [2024-06-03 19:38:32,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:32,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:32,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:32,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 768 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:32,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:32,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:33,470 INFO L124 PetriNetUnfolderBase]: 2321/3604 cut-off events. [2024-06-03 19:38:33,471 INFO L125 PetriNetUnfolderBase]: For 64902/64910 co-relation queries the response was YES. [2024-06-03 19:38:33,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19474 conditions, 3604 events. 2321/3604 cut-off events. For 64902/64910 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18883 event pairs, 721 based on Foata normal form. 24/3615 useless extension candidates. Maximal degree in co-relation 19431. Up to 2921 conditions per place. [2024-06-03 19:38:33,492 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2024-06-03 19:38:33,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 177 transitions, 1516 flow [2024-06-03 19:38:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:38:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:38:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 19:38:33,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-03 19:38:33,495 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 768 flow. Second operand 11 states and 222 transitions. [2024-06-03 19:38:33,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 177 transitions, 1516 flow [2024-06-03 19:38:33,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 1478 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:33,530 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1000 flow [2024-06-03 19:38:33,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1000, PETRI_PLACES=104, PETRI_TRANSITIONS=122} [2024-06-03 19:38:33,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-03 19:38:33,531 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1000 flow [2024-06-03 19:38:33,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:33,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:33,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:38:33,532 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)] === [2024-06-03 19:38:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1145473588, now seen corresponding path program 2 times [2024-06-03 19:38:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775191061] [2024-06-03 19:38:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:34,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775191061] [2024-06-03 19:38:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775191061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:34,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604547654] [2024-06-03 19:38:34,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:34,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:34,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:34,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:34,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:34,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 122 transitions, 1000 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:34,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:34,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:34,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:35,917 INFO L124 PetriNetUnfolderBase]: 2804/4392 cut-off events. [2024-06-03 19:38:35,917 INFO L125 PetriNetUnfolderBase]: For 84957/84961 co-relation queries the response was YES. [2024-06-03 19:38:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25052 conditions, 4392 events. 2804/4392 cut-off events. For 84957/84961 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24381 event pairs, 989 based on Foata normal form. 20/4398 useless extension candidates. Maximal degree in co-relation 25005. Up to 3572 conditions per place. [2024-06-03 19:38:35,946 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 157 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-03 19:38:35,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 219 transitions, 2131 flow [2024-06-03 19:38:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:38:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:38:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-03 19:38:35,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-03 19:38:35,948 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1000 flow. Second operand 11 states and 219 transitions. [2024-06-03 19:38:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 219 transitions, 2131 flow [2024-06-03 19:38:36,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 219 transitions, 2092 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:36,006 INFO L231 Difference]: Finished difference. Result has 117 places, 164 transitions, 1618 flow [2024-06-03 19:38:36,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1618, PETRI_PLACES=117, PETRI_TRANSITIONS=164} [2024-06-03 19:38:36,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-03 19:38:36,007 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 164 transitions, 1618 flow [2024-06-03 19:38:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:36,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:36,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:38:36,007 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)] === [2024-06-03 19:38:36,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash 87418296, now seen corresponding path program 3 times [2024-06-03 19:38:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:36,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507633780] [2024-06-03 19:38:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:36,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:36,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507633780] [2024-06-03 19:38:36,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507633780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145124490] [2024-06-03 19:38:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:37,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:37,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 164 transitions, 1618 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:37,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:37,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:37,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:38,240 INFO L124 PetriNetUnfolderBase]: 3447/5493 cut-off events. [2024-06-03 19:38:38,240 INFO L125 PetriNetUnfolderBase]: For 122006/122016 co-relation queries the response was YES. [2024-06-03 19:38:38,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33740 conditions, 5493 events. 3447/5493 cut-off events. For 122006/122016 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32917 event pairs, 869 based on Foata normal form. 24/5502 useless extension candidates. Maximal degree in co-relation 33686. Up to 3257 conditions per place. [2024-06-03 19:38:38,273 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 138 selfloop transitions, 89 changer transitions 0/234 dead transitions. [2024-06-03 19:38:38,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 234 transitions, 2754 flow [2024-06-03 19:38:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:38:38,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-03 19:38:38,277 INFO L175 Difference]: Start difference. First operand has 117 places, 164 transitions, 1618 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:38:38,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 234 transitions, 2754 flow [2024-06-03 19:38:38,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 234 transitions, 2713 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:38,420 INFO L231 Difference]: Finished difference. Result has 127 places, 180 transitions, 2143 flow [2024-06-03 19:38:38,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2143, PETRI_PLACES=127, PETRI_TRANSITIONS=180} [2024-06-03 19:38:38,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-03 19:38:38,421 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 180 transitions, 2143 flow [2024-06-03 19:38:38,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:38,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:38,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:38,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:38:38,422 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)] === [2024-06-03 19:38:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1986680076, now seen corresponding path program 4 times [2024-06-03 19:38:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595880565] [2024-06-03 19:38:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595880565] [2024-06-03 19:38:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595880565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:39,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670131467] [2024-06-03 19:38:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:39,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 180 transitions, 2143 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:39,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:39,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:39,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:40,678 INFO L124 PetriNetUnfolderBase]: 3596/5713 cut-off events. [2024-06-03 19:38:40,678 INFO L125 PetriNetUnfolderBase]: For 141897/141899 co-relation queries the response was YES. [2024-06-03 19:38:40,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36411 conditions, 5713 events. 3596/5713 cut-off events. For 141897/141899 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34403 event pairs, 1382 based on Foata normal form. 48/5744 useless extension candidates. Maximal degree in co-relation 36353. Up to 4772 conditions per place. [2024-06-03 19:38:40,719 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 154 selfloop transitions, 86 changer transitions 0/247 dead transitions. [2024-06-03 19:38:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 247 transitions, 3146 flow [2024-06-03 19:38:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:38:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:38:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-03 19:38:40,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-03 19:38:40,721 INFO L175 Difference]: Start difference. First operand has 127 places, 180 transitions, 2143 flow. Second operand 11 states and 216 transitions. [2024-06-03 19:38:40,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 247 transitions, 3146 flow [2024-06-03 19:38:40,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 3022 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:40,872 INFO L231 Difference]: Finished difference. Result has 132 places, 198 transitions, 2499 flow [2024-06-03 19:38:40,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2499, PETRI_PLACES=132, PETRI_TRANSITIONS=198} [2024-06-03 19:38:40,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-03 19:38:40,872 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 198 transitions, 2499 flow [2024-06-03 19:38:40,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-03 19:38:40,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:40,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:40,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:38:40,873 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)] === [2024-06-03 19:38:40,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:40,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1145413138, now seen corresponding path program 5 times [2024-06-03 19:38:40,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:40,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960284260] [2024-06-03 19:38:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:40,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:42,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:42,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960284260] [2024-06-03 19:38:42,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960284260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:42,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:42,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60001200] [2024-06-03 19:38:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:42,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:42,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:42,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:42,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 198 transitions, 2499 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:42,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:42,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:42,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:43,432 INFO L124 PetriNetUnfolderBase]: 3812/6080 cut-off events. [2024-06-03 19:38:43,433 INFO L125 PetriNetUnfolderBase]: For 157646/157652 co-relation queries the response was YES. [2024-06-03 19:38:43,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39558 conditions, 6080 events. 3812/6080 cut-off events. For 157646/157652 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37367 event pairs, 1475 based on Foata normal form. 46/6112 useless extension candidates. Maximal degree in co-relation 39499. Up to 5295 conditions per place. [2024-06-03 19:38:43,476 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 61 changer transitions 0/251 dead transitions. [2024-06-03 19:38:43,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 3351 flow [2024-06-03 19:38:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:38:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:38:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 19:38:43,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-03 19:38:43,478 INFO L175 Difference]: Start difference. First operand has 132 places, 198 transitions, 2499 flow. Second operand 11 states and 214 transitions. [2024-06-03 19:38:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 3351 flow [2024-06-03 19:38:43,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 251 transitions, 3153 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:43,625 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 2641 flow [2024-06-03 19:38:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2641, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2024-06-03 19:38:43,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-03 19:38:43,626 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 2641 flow [2024-06-03 19:38:43,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:43,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:43,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:38:43,626 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)] === [2024-06-03 19:38:43,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1142616628, now seen corresponding path program 6 times [2024-06-03 19:38:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605251077] [2024-06-03 19:38:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:44,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605251077] [2024-06-03 19:38:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605251077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:44,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:44,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:44,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163122220] [2024-06-03 19:38:44,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:44,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:44,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:44,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 2641 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:44,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:44,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:46,072 INFO L124 PetriNetUnfolderBase]: 3730/5949 cut-off events. [2024-06-03 19:38:46,072 INFO L125 PetriNetUnfolderBase]: For 152886/152888 co-relation queries the response was YES. [2024-06-03 19:38:46,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38041 conditions, 5949 events. 3730/5949 cut-off events. For 152886/152888 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36460 event pairs, 1456 based on Foata normal form. 42/5977 useless extension candidates. Maximal degree in co-relation 37980. Up to 5224 conditions per place. [2024-06-03 19:38:46,111 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 46 changer transitions 0/244 dead transitions. [2024-06-03 19:38:46,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 244 transitions, 3276 flow [2024-06-03 19:38:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:38:46,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-03 19:38:46,113 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 2641 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:38:46,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 244 transitions, 3276 flow [2024-06-03 19:38:46,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 244 transitions, 3122 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:46,243 INFO L231 Difference]: Finished difference. Result has 138 places, 204 transitions, 2593 flow [2024-06-03 19:38:46,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2593, PETRI_PLACES=138, PETRI_TRANSITIONS=204} [2024-06-03 19:38:46,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-03 19:38:46,244 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 204 transitions, 2593 flow [2024-06-03 19:38:46,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:46,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:46,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:46,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:38:46,244 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)] === [2024-06-03 19:38:46,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:46,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1027325458, now seen corresponding path program 7 times [2024-06-03 19:38:46,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:46,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035413721] [2024-06-03 19:38:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:46,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:47,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:47,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035413721] [2024-06-03 19:38:47,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035413721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:47,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:47,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:47,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844337335] [2024-06-03 19:38:47,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:47,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:47,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:47,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:47,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 204 transitions, 2593 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:47,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:47,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:47,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:48,872 INFO L124 PetriNetUnfolderBase]: 3972/6333 cut-off events. [2024-06-03 19:38:48,873 INFO L125 PetriNetUnfolderBase]: For 153734/153742 co-relation queries the response was YES. [2024-06-03 19:38:48,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39853 conditions, 6333 events. 3972/6333 cut-off events. For 153734/153742 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39422 event pairs, 1389 based on Foata normal form. 28/6347 useless extension candidates. Maximal degree in co-relation 39791. Up to 5577 conditions per place. [2024-06-03 19:38:48,924 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 207 selfloop transitions, 86 changer transitions 0/300 dead transitions. [2024-06-03 19:38:48,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 300 transitions, 3965 flow [2024-06-03 19:38:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 19:38:48,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-03 19:38:48,926 INFO L175 Difference]: Start difference. First operand has 138 places, 204 transitions, 2593 flow. Second operand 10 states and 204 transitions. [2024-06-03 19:38:48,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 300 transitions, 3965 flow [2024-06-03 19:38:49,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 300 transitions, 3879 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:49,112 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3195 flow [2024-06-03 19:38:49,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3195, PETRI_PLACES=145, PETRI_TRANSITIONS=247} [2024-06-03 19:38:49,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-03 19:38:49,113 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3195 flow [2024-06-03 19:38:49,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:49,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:49,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:38:49,114 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)] === [2024-06-03 19:38:49,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1490453314, now seen corresponding path program 1 times [2024-06-03 19:38:49,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:49,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722599310] [2024-06-03 19:38:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:49,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:50,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:50,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722599310] [2024-06-03 19:38:50,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722599310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:50,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:50,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753755984] [2024-06-03 19:38:50,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:50,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:50,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:38:50,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 247 transitions, 3195 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) [2024-06-03 19:38:50,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:50,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:38:50,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:51,838 INFO L124 PetriNetUnfolderBase]: 4598/7187 cut-off events. [2024-06-03 19:38:51,838 INFO L125 PetriNetUnfolderBase]: For 170910/170915 co-relation queries the response was YES. [2024-06-03 19:38:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46325 conditions, 7187 events. 4598/7187 cut-off events. For 170910/170915 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 42997 event pairs, 1981 based on Foata normal form. 6/7186 useless extension candidates. Maximal degree in co-relation 46258. Up to 6789 conditions per place. [2024-06-03 19:38:51,909 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 238 selfloop transitions, 54 changer transitions 0/297 dead transitions. [2024-06-03 19:38:51,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 297 transitions, 4114 flow [2024-06-03 19:38:51,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:38:51,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:38:51,912 INFO L175 Difference]: Start difference. First operand has 145 places, 247 transitions, 3195 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:38:51,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 297 transitions, 4114 flow [2024-06-03 19:38:52,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 297 transitions, 4073 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:52,071 INFO L231 Difference]: Finished difference. Result has 154 places, 263 transitions, 3489 flow [2024-06-03 19:38:52,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3489, PETRI_PLACES=154, PETRI_TRANSITIONS=263} [2024-06-03 19:38:52,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-03 19:38:52,072 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 263 transitions, 3489 flow [2024-06-03 19:38:52,072 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) [2024-06-03 19:38:52,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:52,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:38:52,072 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:52,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1556672819, now seen corresponding path program 1 times [2024-06-03 19:38:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583382966] [2024-06-03 19:38:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:52,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583382966] [2024-06-03 19:38:52,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583382966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:52,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:52,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860600450] [2024-06-03 19:38:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:52,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:52,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:52,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:52,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 263 transitions, 3489 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:38:52,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:52,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:52,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:53,858 INFO L124 PetriNetUnfolderBase]: 4506/7085 cut-off events. [2024-06-03 19:38:53,858 INFO L125 PetriNetUnfolderBase]: For 179803/179865 co-relation queries the response was YES. [2024-06-03 19:38:53,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46872 conditions, 7085 events. 4506/7085 cut-off events. For 179803/179865 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42782 event pairs, 1877 based on Foata normal form. 23/7083 useless extension candidates. Maximal degree in co-relation 46801. Up to 6723 conditions per place. [2024-06-03 19:38:53,915 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 31 changer transitions 0/288 dead transitions. [2024-06-03 19:38:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4216 flow [2024-06-03 19:38:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:38:53,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:38:53,916 INFO L175 Difference]: Start difference. First operand has 154 places, 263 transitions, 3489 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:38:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4216 flow [2024-06-03 19:38:54,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 288 transitions, 4076 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:54,118 INFO L231 Difference]: Finished difference. Result has 156 places, 269 transitions, 3482 flow [2024-06-03 19:38:54,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3482, PETRI_PLACES=156, PETRI_TRANSITIONS=269} [2024-06-03 19:38:54,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-03 19:38:54,119 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 269 transitions, 3482 flow [2024-06-03 19:38:54,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:38:54,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:54,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:54,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:38:54,120 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)] === [2024-06-03 19:38:54,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash 668780736, now seen corresponding path program 8 times [2024-06-03 19:38:54,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:54,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130100656] [2024-06-03 19:38:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:54,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130100656] [2024-06-03 19:38:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130100656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:55,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:55,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180793122] [2024-06-03 19:38:55,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:55,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:55,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 269 transitions, 3482 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:55,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:55,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:55,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:57,019 INFO L124 PetriNetUnfolderBase]: 4376/7001 cut-off events. [2024-06-03 19:38:57,019 INFO L125 PetriNetUnfolderBase]: For 202487/202501 co-relation queries the response was YES. [2024-06-03 19:38:57,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47295 conditions, 7001 events. 4376/7001 cut-off events. For 202487/202501 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 44173 event pairs, 1174 based on Foata normal form. 36/7028 useless extension candidates. Maximal degree in co-relation 47225. Up to 4358 conditions per place. [2024-06-03 19:38:57,079 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 124 changer transitions 0/330 dead transitions. [2024-06-03 19:38:57,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 330 transitions, 4743 flow [2024-06-03 19:38:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 19:38:57,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-03 19:38:57,081 INFO L175 Difference]: Start difference. First operand has 156 places, 269 transitions, 3482 flow. Second operand 10 states and 202 transitions. [2024-06-03 19:38:57,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 330 transitions, 4743 flow [2024-06-03 19:38:57,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 330 transitions, 4696 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:57,318 INFO L231 Difference]: Finished difference. Result has 164 places, 276 transitions, 3997 flow [2024-06-03 19:38:57,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3997, PETRI_PLACES=164, PETRI_TRANSITIONS=276} [2024-06-03 19:38:57,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-03 19:38:57,319 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 276 transitions, 3997 flow [2024-06-03 19:38:57,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:57,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:57,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:57,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:38:57,321 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)] === [2024-06-03 19:38:57,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash -224086946, now seen corresponding path program 9 times [2024-06-03 19:38:57,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:57,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426545547] [2024-06-03 19:38:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426545547] [2024-06-03 19:38:58,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426545547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:58,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:58,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325242960] [2024-06-03 19:38:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:58,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:58,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:58,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:58,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 276 transitions, 3997 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:58,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:58,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:58,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:00,185 INFO L124 PetriNetUnfolderBase]: 4673/7495 cut-off events. [2024-06-03 19:39:00,185 INFO L125 PetriNetUnfolderBase]: For 240137/240143 co-relation queries the response was YES. [2024-06-03 19:39:00,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52610 conditions, 7495 events. 4673/7495 cut-off events. For 240137/240143 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48247 event pairs, 1740 based on Foata normal form. 46/7531 useless extension candidates. Maximal degree in co-relation 52537. Up to 6067 conditions per place. [2024-06-03 19:39:00,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 100 changer transitions 0/329 dead transitions. [2024-06-03 19:39:00,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 329 transitions, 5066 flow [2024-06-03 19:39:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:00,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 19:39:00,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-03 19:39:00,252 INFO L175 Difference]: Start difference. First operand has 164 places, 276 transitions, 3997 flow. Second operand 10 states and 198 transitions. [2024-06-03 19:39:00,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 329 transitions, 5066 flow [2024-06-03 19:39:00,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 329 transitions, 4907 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:00,517 INFO L231 Difference]: Finished difference. Result has 166 places, 281 transitions, 4250 flow [2024-06-03 19:39:00,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4250, PETRI_PLACES=166, PETRI_TRANSITIONS=281} [2024-06-03 19:39:00,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-03 19:39:00,518 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 281 transitions, 4250 flow [2024-06-03 19:39:00,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:00,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:00,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:00,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:39:00,519 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)] === [2024-06-03 19:39:00,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 671637696, now seen corresponding path program 10 times [2024-06-03 19:39:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:00,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846939484] [2024-06-03 19:39:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:00,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:01,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:01,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846939484] [2024-06-03 19:39:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846939484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:01,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:01,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333787211] [2024-06-03 19:39:01,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:01,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:02,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:02,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 281 transitions, 4250 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:02,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:02,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:02,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:03,483 INFO L124 PetriNetUnfolderBase]: 4593/7364 cut-off events. [2024-06-03 19:39:03,483 INFO L125 PetriNetUnfolderBase]: For 203852/203854 co-relation queries the response was YES. [2024-06-03 19:39:03,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50374 conditions, 7364 events. 4593/7364 cut-off events. For 203852/203854 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 47408 event pairs, 1748 based on Foata normal form. 42/7395 useless extension candidates. Maximal degree in co-relation 50301. Up to 6065 conditions per place. [2024-06-03 19:39:03,539 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 244 selfloop transitions, 70 changer transitions 0/322 dead transitions. [2024-06-03 19:39:03,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 322 transitions, 5094 flow [2024-06-03 19:39:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:39:03,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-03 19:39:03,541 INFO L175 Difference]: Start difference. First operand has 166 places, 281 transitions, 4250 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:39:03,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 322 transitions, 5094 flow [2024-06-03 19:39:03,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 4851 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-03 19:39:03,817 INFO L231 Difference]: Finished difference. Result has 166 places, 281 transitions, 4172 flow [2024-06-03 19:39:03,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4007, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4172, PETRI_PLACES=166, PETRI_TRANSITIONS=281} [2024-06-03 19:39:03,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-03 19:39:03,818 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 281 transitions, 4172 flow [2024-06-03 19:39:03,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:03,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:03,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:03,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:39:03,818 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)] === [2024-06-03 19:39:03,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 787113564, now seen corresponding path program 2 times [2024-06-03 19:39:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:03,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112449041] [2024-06-03 19:39:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:05,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:05,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112449041] [2024-06-03 19:39:05,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112449041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:05,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:05,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281938031] [2024-06-03 19:39:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:05,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:05,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 281 transitions, 4172 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) [2024-06-03 19:39:05,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:05,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:05,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:06,855 INFO L124 PetriNetUnfolderBase]: 5262/8289 cut-off events. [2024-06-03 19:39:06,855 INFO L125 PetriNetUnfolderBase]: For 200662/200667 co-relation queries the response was YES. [2024-06-03 19:39:06,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55661 conditions, 8289 events. 5262/8289 cut-off events. For 200662/200667 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51751 event pairs, 2322 based on Foata normal form. 6/8288 useless extension candidates. Maximal degree in co-relation 55588. Up to 7841 conditions per place. [2024-06-03 19:39:06,928 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 258 selfloop transitions, 58 changer transitions 0/321 dead transitions. [2024-06-03 19:39:06,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 321 transitions, 5071 flow [2024-06-03 19:39:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:39:06,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:39:06,930 INFO L175 Difference]: Start difference. First operand has 166 places, 281 transitions, 4172 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:39:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 321 transitions, 5071 flow [2024-06-03 19:39:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 321 transitions, 4862 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 19:39:07,297 INFO L231 Difference]: Finished difference. Result has 166 places, 288 transitions, 4191 flow [2024-06-03 19:39:07,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4191, PETRI_PLACES=166, PETRI_TRANSITIONS=288} [2024-06-03 19:39:07,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-03 19:39:07,298 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 288 transitions, 4191 flow [2024-06-03 19:39:07,298 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) [2024-06-03 19:39:07,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:07,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:39:07,299 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)] === [2024-06-03 19:39:07,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 786928866, now seen corresponding path program 11 times [2024-06-03 19:39:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:07,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997756192] [2024-06-03 19:39:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:07,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:08,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997756192] [2024-06-03 19:39:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997756192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:08,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709147572] [2024-06-03 19:39:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:08,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:08,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:08,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 288 transitions, 4191 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:08,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:08,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:08,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:09,952 INFO L124 PetriNetUnfolderBase]: 4699/7541 cut-off events. [2024-06-03 19:39:09,952 INFO L125 PetriNetUnfolderBase]: For 190961/190973 co-relation queries the response was YES. [2024-06-03 19:39:09,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50748 conditions, 7541 events. 4699/7541 cut-off events. For 190961/190973 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 49076 event pairs, 1701 based on Foata normal form. 32/7554 useless extension candidates. Maximal degree in co-relation 50674. Up to 6468 conditions per place. [2024-06-03 19:39:10,022 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 210 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-03 19:39:10,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 335 transitions, 5241 flow [2024-06-03 19:39:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:39:10,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-03 19:39:10,024 INFO L175 Difference]: Start difference. First operand has 166 places, 288 transitions, 4191 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:39:10,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 335 transitions, 5241 flow [2024-06-03 19:39:10,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 335 transitions, 5087 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:10,335 INFO L231 Difference]: Finished difference. Result has 170 places, 289 transitions, 4319 flow [2024-06-03 19:39:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4319, PETRI_PLACES=170, PETRI_TRANSITIONS=289} [2024-06-03 19:39:10,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-03 19:39:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 289 transitions, 4319 flow [2024-06-03 19:39:10,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:10,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:10,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:10,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:39:10,337 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash 7303525, now seen corresponding path program 2 times [2024-06-03 19:39:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:10,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139604342] [2024-06-03 19:39:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:10,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:11,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:11,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139604342] [2024-06-03 19:39:11,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139604342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:11,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:11,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048062790] [2024-06-03 19:39:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:11,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:11,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 289 transitions, 4319 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:39:11,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:11,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:11,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:12,442 INFO L124 PetriNetUnfolderBase]: 5230/8329 cut-off events. [2024-06-03 19:39:12,442 INFO L125 PetriNetUnfolderBase]: For 198470/198522 co-relation queries the response was YES. [2024-06-03 19:39:12,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55727 conditions, 8329 events. 5230/8329 cut-off events. For 198470/198522 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 53323 event pairs, 2768 based on Foata normal form. 15/8327 useless extension candidates. Maximal degree in co-relation 55652. Up to 7945 conditions per place. [2024-06-03 19:39:12,520 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 264 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-03 19:39:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 316 transitions, 5217 flow [2024-06-03 19:39:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:39:12,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-03 19:39:12,521 INFO L175 Difference]: Start difference. First operand has 170 places, 289 transitions, 4319 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:39:12,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 316 transitions, 5217 flow [2024-06-03 19:39:12,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 316 transitions, 4953 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:12,790 INFO L231 Difference]: Finished difference. Result has 171 places, 304 transitions, 4386 flow [2024-06-03 19:39:12,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4386, PETRI_PLACES=171, PETRI_TRANSITIONS=304} [2024-06-03 19:39:12,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-03 19:39:12,790 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 304 transitions, 4386 flow [2024-06-03 19:39:12,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:39:12,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:12,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:12,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:39:12,791 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:12,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1402085536, now seen corresponding path program 3 times [2024-06-03 19:39:12,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:12,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887087436] [2024-06-03 19:39:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:12,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:14,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:14,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887087436] [2024-06-03 19:39:14,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887087436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:14,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:14,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:14,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375117236] [2024-06-03 19:39:14,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:14,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:14,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:14,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 304 transitions, 4386 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) [2024-06-03 19:39:14,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:14,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:14,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:15,540 INFO L124 PetriNetUnfolderBase]: 5412/8536 cut-off events. [2024-06-03 19:39:15,540 INFO L125 PetriNetUnfolderBase]: For 194691/194691 co-relation queries the response was YES. [2024-06-03 19:39:15,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56296 conditions, 8536 events. 5412/8536 cut-off events. For 194691/194691 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 53775 event pairs, 2733 based on Foata normal form. 4/8534 useless extension candidates. Maximal degree in co-relation 56219. Up to 8184 conditions per place. [2024-06-03 19:39:15,622 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 36 changer transitions 0/340 dead transitions. [2024-06-03 19:39:15,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 340 transitions, 5310 flow [2024-06-03 19:39:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:39:15,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:39:15,624 INFO L175 Difference]: Start difference. First operand has 171 places, 304 transitions, 4386 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:39:15,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 340 transitions, 5310 flow [2024-06-03 19:39:15,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 340 transitions, 5257 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:15,910 INFO L231 Difference]: Finished difference. Result has 176 places, 311 transitions, 4538 flow [2024-06-03 19:39:15,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4333, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4538, PETRI_PLACES=176, PETRI_TRANSITIONS=311} [2024-06-03 19:39:15,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-03 19:39:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 311 transitions, 4538 flow [2024-06-03 19:39:15,911 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) [2024-06-03 19:39:15,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:15,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:39:15,912 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)] === [2024-06-03 19:39:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1240053782, now seen corresponding path program 4 times [2024-06-03 19:39:15,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54504977] [2024-06-03 19:39:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54504977] [2024-06-03 19:39:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54504977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:17,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:17,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511344716] [2024-06-03 19:39:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:17,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:17,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:17,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 311 transitions, 4538 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) [2024-06-03 19:39:17,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:17,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:17,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:18,616 INFO L124 PetriNetUnfolderBase]: 5429/8565 cut-off events. [2024-06-03 19:39:18,616 INFO L125 PetriNetUnfolderBase]: For 206537/206537 co-relation queries the response was YES. [2024-06-03 19:39:18,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57547 conditions, 8565 events. 5429/8565 cut-off events. For 206537/206537 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 53956 event pairs, 2774 based on Foata normal form. 4/8563 useless extension candidates. Maximal degree in co-relation 57468. Up to 8224 conditions per place. [2024-06-03 19:39:18,696 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 30 changer transitions 0/340 dead transitions. [2024-06-03 19:39:18,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 340 transitions, 5401 flow [2024-06-03 19:39:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:39:18,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:39:18,698 INFO L175 Difference]: Start difference. First operand has 176 places, 311 transitions, 4538 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:39:18,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 340 transitions, 5401 flow [2024-06-03 19:39:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 340 transitions, 5278 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:19,001 INFO L231 Difference]: Finished difference. Result has 179 places, 313 transitions, 4534 flow [2024-06-03 19:39:19,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4534, PETRI_PLACES=179, PETRI_TRANSITIONS=313} [2024-06-03 19:39:19,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-03 19:39:19,002 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 313 transitions, 4534 flow [2024-06-03 19:39:19,002 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) [2024-06-03 19:39:19,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:19,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:19,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:39:19,002 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)] === [2024-06-03 19:39:19,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1401900838, now seen corresponding path program 12 times [2024-06-03 19:39:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:19,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702939768] [2024-06-03 19:39:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:19,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:20,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702939768] [2024-06-03 19:39:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702939768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:20,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:20,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:20,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226513617] [2024-06-03 19:39:20,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:20,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:20,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:20,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 313 transitions, 4534 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:20,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:20,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:20,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:21,663 INFO L124 PetriNetUnfolderBase]: 4817/7738 cut-off events. [2024-06-03 19:39:21,663 INFO L125 PetriNetUnfolderBase]: For 208013/208013 co-relation queries the response was YES. [2024-06-03 19:39:21,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52358 conditions, 7738 events. 4817/7738 cut-off events. For 208013/208013 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50305 event pairs, 2296 based on Foata normal form. 24/7747 useless extension candidates. Maximal degree in co-relation 52278. Up to 7029 conditions per place. [2024-06-03 19:39:21,736 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 58 changer transitions 0/355 dead transitions. [2024-06-03 19:39:21,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 355 transitions, 5604 flow [2024-06-03 19:39:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:39:21,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:39:21,739 INFO L175 Difference]: Start difference. First operand has 179 places, 313 transitions, 4534 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:39:21,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 355 transitions, 5604 flow [2024-06-03 19:39:22,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 355 transitions, 5511 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:22,048 INFO L231 Difference]: Finished difference. Result has 182 places, 314 transitions, 4602 flow [2024-06-03 19:39:22,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4441, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=182, PETRI_TRANSITIONS=314} [2024-06-03 19:39:22,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-03 19:39:22,049 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 314 transitions, 4602 flow [2024-06-03 19:39:22,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:22,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:22,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:22,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:39:22,050 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)] === [2024-06-03 19:39:22,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1638557566, now seen corresponding path program 5 times [2024-06-03 19:39:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:22,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815465530] [2024-06-03 19:39:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:23,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815465530] [2024-06-03 19:39:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815465530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066029393] [2024-06-03 19:39:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:23,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:23,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:23,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:23,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 314 transitions, 4602 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) [2024-06-03 19:39:23,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:23,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:23,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:24,527 INFO L124 PetriNetUnfolderBase]: 5450/8606 cut-off events. [2024-06-03 19:39:24,527 INFO L125 PetriNetUnfolderBase]: For 221252/221252 co-relation queries the response was YES. [2024-06-03 19:39:24,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58295 conditions, 8606 events. 5450/8606 cut-off events. For 221252/221252 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54113 event pairs, 2743 based on Foata normal form. 4/8604 useless extension candidates. Maximal degree in co-relation 58214. Up to 8304 conditions per place. [2024-06-03 19:39:24,607 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 317 selfloop transitions, 18 changer transitions 0/340 dead transitions. [2024-06-03 19:39:24,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 340 transitions, 5442 flow [2024-06-03 19:39:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:39:24,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:39:24,608 INFO L175 Difference]: Start difference. First operand has 182 places, 314 transitions, 4602 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:39:24,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 340 transitions, 5442 flow [2024-06-03 19:39:25,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 340 transitions, 5332 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:25,011 INFO L231 Difference]: Finished difference. Result has 184 places, 316 transitions, 4589 flow [2024-06-03 19:39:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=184, PETRI_TRANSITIONS=316} [2024-06-03 19:39:25,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-03 19:39:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 316 transitions, 4589 flow [2024-06-03 19:39:25,012 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) [2024-06-03 19:39:25,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:25,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:25,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:39:25,012 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)] === [2024-06-03 19:39:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash 66311068, now seen corresponding path program 1 times [2024-06-03 19:39:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787586124] [2024-06-03 19:39:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:25,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:26,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787586124] [2024-06-03 19:39:26,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787586124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:26,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:26,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:26,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298432785] [2024-06-03 19:39:26,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:26,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:26,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:26,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 316 transitions, 4589 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) [2024-06-03 19:39:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:27,891 INFO L124 PetriNetUnfolderBase]: 5463/8623 cut-off events. [2024-06-03 19:39:27,891 INFO L125 PetriNetUnfolderBase]: For 225343/225343 co-relation queries the response was YES. [2024-06-03 19:39:27,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58285 conditions, 8623 events. 5463/8623 cut-off events. For 225343/225343 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54428 event pairs, 2762 based on Foata normal form. 3/8620 useless extension candidates. Maximal degree in co-relation 58203. Up to 8262 conditions per place. [2024-06-03 19:39:27,953 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 42 changer transitions 0/353 dead transitions. [2024-06-03 19:39:27,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 353 transitions, 5553 flow [2024-06-03 19:39:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:39:27,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:39:27,955 INFO L175 Difference]: Start difference. First operand has 184 places, 316 transitions, 4589 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:39:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 353 transitions, 5553 flow [2024-06-03 19:39:28,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 353 transitions, 5422 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:28,324 INFO L231 Difference]: Finished difference. Result has 186 places, 324 transitions, 4675 flow [2024-06-03 19:39:28,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4675, PETRI_PLACES=186, PETRI_TRANSITIONS=324} [2024-06-03 19:39:28,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-03 19:39:28,325 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 324 transitions, 4675 flow [2024-06-03 19:39:28,325 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) [2024-06-03 19:39:28,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:28,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:28,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:39:28,325 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:28,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -435600605, now seen corresponding path program 3 times [2024-06-03 19:39:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031176569] [2024-06-03 19:39:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:29,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031176569] [2024-06-03 19:39:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031176569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:29,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:29,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:29,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37111830] [2024-06-03 19:39:29,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:29,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:29,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:29,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:29,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:29,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 324 transitions, 4675 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:39:29,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:29,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:29,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:30,549 INFO L124 PetriNetUnfolderBase]: 5286/8418 cut-off events. [2024-06-03 19:39:30,549 INFO L125 PetriNetUnfolderBase]: For 232783/232872 co-relation queries the response was YES. [2024-06-03 19:39:30,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57166 conditions, 8418 events. 5286/8418 cut-off events. For 232783/232872 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 53872 event pairs, 2728 based on Foata normal form. 33/8434 useless extension candidates. Maximal degree in co-relation 57083. Up to 8051 conditions per place. [2024-06-03 19:39:30,617 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 293 selfloop transitions, 13 changer transitions 0/332 dead transitions. [2024-06-03 19:39:30,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 332 transitions, 5319 flow [2024-06-03 19:39:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:30,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:39:30,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-03 19:39:30,618 INFO L175 Difference]: Start difference. First operand has 186 places, 324 transitions, 4675 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:39:30,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 332 transitions, 5319 flow [2024-06-03 19:39:30,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 332 transitions, 5180 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:30,941 INFO L231 Difference]: Finished difference. Result has 185 places, 324 transitions, 4568 flow [2024-06-03 19:39:30,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4568, PETRI_PLACES=185, PETRI_TRANSITIONS=324} [2024-06-03 19:39:30,942 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-03 19:39:30,942 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 324 transitions, 4568 flow [2024-06-03 19:39:30,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-03 19:39:30,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:30,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:30,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:39:30,943 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:30,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -441308573, now seen corresponding path program 1 times [2024-06-03 19:39:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:30,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876090889] [2024-06-03 19:39:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:30,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:31,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:31,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876090889] [2024-06-03 19:39:31,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876090889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:31,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:31,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774233332] [2024-06-03 19:39:31,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:31,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:31,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:31,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:31,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 324 transitions, 4568 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:31,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:31,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:31,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:33,146 INFO L124 PetriNetUnfolderBase]: 5462/8621 cut-off events. [2024-06-03 19:39:33,146 INFO L125 PetriNetUnfolderBase]: For 240113/240113 co-relation queries the response was YES. [2024-06-03 19:39:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58560 conditions, 8621 events. 5462/8621 cut-off events. For 240113/240113 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54381 event pairs, 2774 based on Foata normal form. 1/8616 useless extension candidates. Maximal degree in co-relation 58476. Up to 8360 conditions per place. [2024-06-03 19:39:33,215 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 320 selfloop transitions, 17 changer transitions 0/342 dead transitions. [2024-06-03 19:39:33,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 342 transitions, 5412 flow [2024-06-03 19:39:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:39:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:39:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:39:33,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:39:33,216 INFO L175 Difference]: Start difference. First operand has 185 places, 324 transitions, 4568 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:39:33,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 342 transitions, 5412 flow [2024-06-03 19:39:33,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 342 transitions, 5384 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:33,560 INFO L231 Difference]: Finished difference. Result has 186 places, 330 transitions, 4638 flow [2024-06-03 19:39:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4638, PETRI_PLACES=186, PETRI_TRANSITIONS=330} [2024-06-03 19:39:33,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-03 19:39:33,561 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 330 transitions, 4638 flow [2024-06-03 19:39:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:33,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:33,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:33,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:39:33,561 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:33,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:33,562 INFO L85 PathProgramCache]: Analyzing trace with hash 23177137, now seen corresponding path program 2 times [2024-06-03 19:39:33,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:33,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697199116] [2024-06-03 19:39:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:33,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:34,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697199116] [2024-06-03 19:39:34,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697199116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:34,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125538368] [2024-06-03 19:39:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:34,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:34,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 330 transitions, 4638 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:34,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:34,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:35,801 INFO L124 PetriNetUnfolderBase]: 5459/8618 cut-off events. [2024-06-03 19:39:35,801 INFO L125 PetriNetUnfolderBase]: For 251014/251017 co-relation queries the response was YES. [2024-06-03 19:39:35,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59472 conditions, 8618 events. 5459/8618 cut-off events. For 251014/251017 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54356 event pairs, 2777 based on Foata normal form. 3/8614 useless extension candidates. Maximal degree in co-relation 59387. Up to 8357 conditions per place. [2024-06-03 19:39:35,874 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 315 selfloop transitions, 18 changer transitions 0/338 dead transitions. [2024-06-03 19:39:35,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 338 transitions, 5336 flow [2024-06-03 19:39:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-03 19:39:35,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-03 19:39:35,875 INFO L175 Difference]: Start difference. First operand has 186 places, 330 transitions, 4638 flow. Second operand 7 states and 114 transitions. [2024-06-03 19:39:35,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 338 transitions, 5336 flow [2024-06-03 19:39:36,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 338 transitions, 5289 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-03 19:39:36,309 INFO L231 Difference]: Finished difference. Result has 191 places, 330 transitions, 4633 flow [2024-06-03 19:39:36,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=191, PETRI_TRANSITIONS=330} [2024-06-03 19:39:36,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-03 19:39:36,310 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 330 transitions, 4633 flow [2024-06-03 19:39:36,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:36,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:36,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:39:36,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:36,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 7703363, now seen corresponding path program 1 times [2024-06-03 19:39:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:36,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523984418] [2024-06-03 19:39:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:36,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:37,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523984418] [2024-06-03 19:39:37,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523984418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:37,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:37,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:39:37,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208658862] [2024-06-03 19:39:37,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:37,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:39:37,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:39:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:39:37,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:37,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 330 transitions, 4633 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:37,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:37,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:37,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:38,744 INFO L124 PetriNetUnfolderBase]: 5397/8535 cut-off events. [2024-06-03 19:39:38,745 INFO L125 PetriNetUnfolderBase]: For 259048/259137 co-relation queries the response was YES. [2024-06-03 19:39:38,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58480 conditions, 8535 events. 5397/8535 cut-off events. For 259048/259137 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 53965 event pairs, 2804 based on Foata normal form. 34/8556 useless extension candidates. Maximal degree in co-relation 58393. Up to 8260 conditions per place. [2024-06-03 19:39:38,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 305 selfloop transitions, 15 changer transitions 0/344 dead transitions. [2024-06-03 19:39:38,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 344 transitions, 5343 flow [2024-06-03 19:39:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:39:38,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-03 19:39:38,828 INFO L175 Difference]: Start difference. First operand has 191 places, 330 transitions, 4633 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:39:38,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 344 transitions, 5343 flow [2024-06-03 19:39:39,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 344 transitions, 5295 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:39,308 INFO L231 Difference]: Finished difference. Result has 191 places, 333 transitions, 4659 flow [2024-06-03 19:39:39,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4659, PETRI_PLACES=191, PETRI_TRANSITIONS=333} [2024-06-03 19:39:39,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-03 19:39:39,309 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 333 transitions, 4659 flow [2024-06-03 19:39:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:39,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:39,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:39:39,310 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)] === [2024-06-03 19:39:39,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 947369162, now seen corresponding path program 1 times [2024-06-03 19:39:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:39,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257705793] [2024-06-03 19:39:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:40,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:40,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257705793] [2024-06-03 19:39:40,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257705793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:40,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:40,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:40,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914204787] [2024-06-03 19:39:40,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:40,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:40,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:40,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:40,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 333 transitions, 4659 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:40,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:40,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:40,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:42,508 INFO L124 PetriNetUnfolderBase]: 5504/8678 cut-off events. [2024-06-03 19:39:42,509 INFO L125 PetriNetUnfolderBase]: For 269155/269159 co-relation queries the response was YES. [2024-06-03 19:39:42,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60303 conditions, 8678 events. 5504/8678 cut-off events. For 269155/269159 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 54651 event pairs, 2256 based on Foata normal form. 12/8684 useless extension candidates. Maximal degree in co-relation 60216. Up to 8277 conditions per place. [2024-06-03 19:39:42,581 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 321 selfloop transitions, 52 changer transitions 0/378 dead transitions. [2024-06-03 19:39:42,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 378 transitions, 5757 flow [2024-06-03 19:39:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:39:42,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:39:42,582 INFO L175 Difference]: Start difference. First operand has 191 places, 333 transitions, 4659 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:39:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 378 transitions, 5757 flow [2024-06-03 19:39:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 378 transitions, 5705 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:42,943 INFO L231 Difference]: Finished difference. Result has 197 places, 343 transitions, 4956 flow [2024-06-03 19:39:42,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4956, PETRI_PLACES=197, PETRI_TRANSITIONS=343} [2024-06-03 19:39:42,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-03 19:39:42,944 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 343 transitions, 4956 flow [2024-06-03 19:39:42,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:42,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:42,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:39:42,945 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)] === [2024-06-03 19:39:42,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1776599074, now seen corresponding path program 2 times [2024-06-03 19:39:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:42,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320410425] [2024-06-03 19:39:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:44,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:44,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320410425] [2024-06-03 19:39:44,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320410425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:44,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:44,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356497035] [2024-06-03 19:39:44,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:44,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:44,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:44,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:44,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:44,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 343 transitions, 4956 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:44,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:44,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:44,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:46,211 INFO L124 PetriNetUnfolderBase]: 5564/8767 cut-off events. [2024-06-03 19:39:46,211 INFO L125 PetriNetUnfolderBase]: For 280738/280750 co-relation queries the response was YES. [2024-06-03 19:39:46,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62038 conditions, 8767 events. 5564/8767 cut-off events. For 280738/280750 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 55161 event pairs, 1922 based on Foata normal form. 12/8772 useless extension candidates. Maximal degree in co-relation 61949. Up to 7948 conditions per place. [2024-06-03 19:39:46,278 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 260 selfloop transitions, 144 changer transitions 0/409 dead transitions. [2024-06-03 19:39:46,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 409 transitions, 6260 flow [2024-06-03 19:39:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:39:46,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:39:46,280 INFO L175 Difference]: Start difference. First operand has 197 places, 343 transitions, 4956 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:39:46,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 409 transitions, 6260 flow [2024-06-03 19:39:46,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 409 transitions, 6052 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:46,833 INFO L231 Difference]: Finished difference. Result has 202 places, 366 transitions, 5390 flow [2024-06-03 19:39:46,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5390, PETRI_PLACES=202, PETRI_TRANSITIONS=366} [2024-06-03 19:39:46,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:39:46,834 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 366 transitions, 5390 flow [2024-06-03 19:39:46,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:46,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:46,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:39:46,835 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)] === [2024-06-03 19:39:46,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -958153032, now seen corresponding path program 3 times [2024-06-03 19:39:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:46,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114579430] [2024-06-03 19:39:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114579430] [2024-06-03 19:39:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114579430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373638093] [2024-06-03 19:39:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:48,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 366 transitions, 5390 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:48,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:48,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:49,931 INFO L124 PetriNetUnfolderBase]: 5606/8835 cut-off events. [2024-06-03 19:39:49,932 INFO L125 PetriNetUnfolderBase]: For 300884/300896 co-relation queries the response was YES. [2024-06-03 19:39:49,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64001 conditions, 8835 events. 5606/8835 cut-off events. For 300884/300896 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 55688 event pairs, 1923 based on Foata normal form. 12/8840 useless extension candidates. Maximal degree in co-relation 63909. Up to 7879 conditions per place. [2024-06-03 19:39:50,027 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 257 selfloop transitions, 156 changer transitions 0/418 dead transitions. [2024-06-03 19:39:50,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 418 transitions, 6781 flow [2024-06-03 19:39:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:39:50,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:39:50,029 INFO L175 Difference]: Start difference. First operand has 202 places, 366 transitions, 5390 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:39:50,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 418 transitions, 6781 flow [2024-06-03 19:39:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 418 transitions, 6559 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-03 19:39:50,767 INFO L231 Difference]: Finished difference. Result has 210 places, 372 transitions, 5709 flow [2024-06-03 19:39:50,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5709, PETRI_PLACES=210, PETRI_TRANSITIONS=372} [2024-06-03 19:39:50,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-03 19:39:50,768 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 372 transitions, 5709 flow [2024-06-03 19:39:50,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:50,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:50,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:50,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:39:50,768 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)] === [2024-06-03 19:39:50,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1782163264, now seen corresponding path program 4 times [2024-06-03 19:39:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:50,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578047903] [2024-06-03 19:39:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:51,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578047903] [2024-06-03 19:39:51,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578047903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:51,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:51,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:51,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434149810] [2024-06-03 19:39:51,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:51,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:51,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:51,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:52,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:52,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 372 transitions, 5709 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:52,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:52,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:52,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:53,962 INFO L124 PetriNetUnfolderBase]: 5598/8818 cut-off events. [2024-06-03 19:39:53,962 INFO L125 PetriNetUnfolderBase]: For 310004/310016 co-relation queries the response was YES. [2024-06-03 19:39:54,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63868 conditions, 8818 events. 5598/8818 cut-off events. For 310004/310016 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 55431 event pairs, 2025 based on Foata normal form. 12/8823 useless extension candidates. Maximal degree in co-relation 63774. Up to 8002 conditions per place. [2024-06-03 19:39:54,059 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 269 selfloop transitions, 143 changer transitions 0/417 dead transitions. [2024-06-03 19:39:54,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 417 transitions, 6793 flow [2024-06-03 19:39:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:39:54,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:39:54,061 INFO L175 Difference]: Start difference. First operand has 210 places, 372 transitions, 5709 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:39:54,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 417 transitions, 6793 flow [2024-06-03 19:39:54,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 417 transitions, 6477 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:54,867 INFO L231 Difference]: Finished difference. Result has 215 places, 374 transitions, 5728 flow [2024-06-03 19:39:54,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5728, PETRI_PLACES=215, PETRI_TRANSITIONS=374} [2024-06-03 19:39:54,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-03 19:39:54,868 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 374 transitions, 5728 flow [2024-06-03 19:39:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:39:54,869 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)] === [2024-06-03 19:39:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964403, now seen corresponding path program 1 times [2024-06-03 19:39:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029799685] [2024-06-03 19:39:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029799685] [2024-06-03 19:39:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029799685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:55,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:39:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372148480] [2024-06-03 19:39:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:39:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:39:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:39:55,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:55,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 374 transitions, 5728 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:55,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:55,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:55,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:57,432 INFO L124 PetriNetUnfolderBase]: 5535/8737 cut-off events. [2024-06-03 19:39:57,432 INFO L125 PetriNetUnfolderBase]: For 319585/319671 co-relation queries the response was YES. [2024-06-03 19:39:57,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63653 conditions, 8737 events. 5535/8737 cut-off events. For 319585/319671 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 55277 event pairs, 2204 based on Foata normal form. 32/8748 useless extension candidates. Maximal degree in co-relation 63556. Up to 8372 conditions per place. [2024-06-03 19:39:57,527 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 52 changer transitions 0/400 dead transitions. [2024-06-03 19:39:57,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 400 transitions, 6719 flow [2024-06-03 19:39:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:39:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:39:57,529 INFO L175 Difference]: Start difference. First operand has 215 places, 374 transitions, 5728 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:39:57,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 400 transitions, 6719 flow [2024-06-03 19:39:58,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 400 transitions, 6420 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:58,045 INFO L231 Difference]: Finished difference. Result has 216 places, 380 transitions, 5626 flow [2024-06-03 19:39:58,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5429, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5626, PETRI_PLACES=216, PETRI_TRANSITIONS=380} [2024-06-03 19:39:58,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-03 19:39:58,046 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 380 transitions, 5626 flow [2024-06-03 19:39:58,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:58,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:58,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:39:58,047 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)] === [2024-06-03 19:39:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 870616762, now seen corresponding path program 5 times [2024-06-03 19:39:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965550598] [2024-06-03 19:39:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:59,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965550598] [2024-06-03 19:39:59,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965550598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:59,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696303505] [2024-06-03 19:39:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:59,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:59,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 380 transitions, 5626 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:59,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:59,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:59,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:01,257 INFO L124 PetriNetUnfolderBase]: 5602/8824 cut-off events. [2024-06-03 19:40:01,257 INFO L125 PetriNetUnfolderBase]: For 326245/326249 co-relation queries the response was YES. [2024-06-03 19:40:01,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64130 conditions, 8824 events. 5602/8824 cut-off events. For 326245/326249 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 55737 event pairs, 2302 based on Foata normal form. 12/8824 useless extension candidates. Maximal degree in co-relation 64032. Up to 8282 conditions per place. [2024-06-03 19:40:01,354 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 341 selfloop transitions, 78 changer transitions 0/426 dead transitions. [2024-06-03 19:40:01,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 426 transitions, 6851 flow [2024-06-03 19:40:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:40:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:40:01,356 INFO L175 Difference]: Start difference. First operand has 216 places, 380 transitions, 5626 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:40:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 426 transitions, 6851 flow [2024-06-03 19:40:01,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 426 transitions, 6769 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:01,947 INFO L231 Difference]: Finished difference. Result has 222 places, 389 transitions, 5947 flow [2024-06-03 19:40:01,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5947, PETRI_PLACES=222, PETRI_TRANSITIONS=389} [2024-06-03 19:40:01,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-03 19:40:01,948 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 389 transitions, 5947 flow [2024-06-03 19:40:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:01,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:01,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:40:01,949 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)] === [2024-06-03 19:40:01,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1009144912, now seen corresponding path program 6 times [2024-06-03 19:40:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:01,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016362545] [2024-06-03 19:40:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:01,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:03,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:03,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016362545] [2024-06-03 19:40:03,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016362545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:03,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:03,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444371636] [2024-06-03 19:40:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:03,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:03,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:03,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:03,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 389 transitions, 5947 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:03,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:03,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:03,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:05,100 INFO L124 PetriNetUnfolderBase]: 5662/8916 cut-off events. [2024-06-03 19:40:05,101 INFO L125 PetriNetUnfolderBase]: For 341684/341696 co-relation queries the response was YES. [2024-06-03 19:40:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66152 conditions, 8916 events. 5662/8916 cut-off events. For 341684/341696 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 56175 event pairs, 2023 based on Foata normal form. 12/8921 useless extension candidates. Maximal degree in co-relation 66051. Up to 8041 conditions per place. [2024-06-03 19:40:05,185 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 157 changer transitions 0/448 dead transitions. [2024-06-03 19:40:05,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 448 transitions, 7327 flow [2024-06-03 19:40:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:40:05,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:40:05,187 INFO L175 Difference]: Start difference. First operand has 222 places, 389 transitions, 5947 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:40:05,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 448 transitions, 7327 flow [2024-06-03 19:40:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 448 transitions, 7082 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:05,741 INFO L231 Difference]: Finished difference. Result has 225 places, 403 transitions, 6253 flow [2024-06-03 19:40:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6253, PETRI_PLACES=225, PETRI_TRANSITIONS=403} [2024-06-03 19:40:05,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-03 19:40:05,742 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 403 transitions, 6253 flow [2024-06-03 19:40:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:40:05,742 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)] === [2024-06-03 19:40:05,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2104666534, now seen corresponding path program 7 times [2024-06-03 19:40:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642023747] [2024-06-03 19:40:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:07,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:07,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642023747] [2024-06-03 19:40:07,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642023747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:07,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:07,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596592450] [2024-06-03 19:40:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:07,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:07,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:07,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:07,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:07,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 403 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:07,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:07,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:07,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:08,777 INFO L124 PetriNetUnfolderBase]: 5679/8937 cut-off events. [2024-06-03 19:40:08,777 INFO L125 PetriNetUnfolderBase]: For 357338/357350 co-relation queries the response was YES. [2024-06-03 19:40:08,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67305 conditions, 8937 events. 5679/8937 cut-off events. For 357338/357350 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 56324 event pairs, 2061 based on Foata normal form. 12/8942 useless extension candidates. Maximal degree in co-relation 67203. Up to 8068 conditions per place. [2024-06-03 19:40:09,068 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 286 selfloop transitions, 163 changer transitions 0/456 dead transitions. [2024-06-03 19:40:09,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 456 transitions, 7625 flow [2024-06-03 19:40:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:40:09,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:40:09,069 INFO L175 Difference]: Start difference. First operand has 225 places, 403 transitions, 6253 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:40:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 456 transitions, 7625 flow [2024-06-03 19:40:09,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 456 transitions, 7242 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:09,577 INFO L231 Difference]: Finished difference. Result has 227 places, 409 transitions, 6340 flow [2024-06-03 19:40:09,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6340, PETRI_PLACES=227, PETRI_TRANSITIONS=409} [2024-06-03 19:40:09,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-03 19:40:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 409 transitions, 6340 flow [2024-06-03 19:40:09,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:09,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:09,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:09,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:40:09,578 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)] === [2024-06-03 19:40:09,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:09,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2104673974, now seen corresponding path program 8 times [2024-06-03 19:40:09,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:09,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306587944] [2024-06-03 19:40:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:10,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:10,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306587944] [2024-06-03 19:40:10,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306587944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:10,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:10,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:10,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019823350] [2024-06-03 19:40:10,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:10,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:10,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:10,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:11,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:11,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 409 transitions, 6340 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:11,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:11,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:11,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:12,606 INFO L124 PetriNetUnfolderBase]: 5696/8969 cut-off events. [2024-06-03 19:40:12,607 INFO L125 PetriNetUnfolderBase]: For 359616/359628 co-relation queries the response was YES. [2024-06-03 19:40:12,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67615 conditions, 8969 events. 5696/8969 cut-off events. For 359616/359628 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 56667 event pairs, 1924 based on Foata normal form. 12/8974 useless extension candidates. Maximal degree in co-relation 67513. Up to 7857 conditions per place. [2024-06-03 19:40:12,709 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 265 selfloop transitions, 184 changer transitions 0/456 dead transitions. [2024-06-03 19:40:12,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 456 transitions, 7623 flow [2024-06-03 19:40:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:40:12,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:40:12,710 INFO L175 Difference]: Start difference. First operand has 227 places, 409 transitions, 6340 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:40:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 456 transitions, 7623 flow [2024-06-03 19:40:13,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 456 transitions, 7299 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:13,336 INFO L231 Difference]: Finished difference. Result has 231 places, 411 transitions, 6472 flow [2024-06-03 19:40:13,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6472, PETRI_PLACES=231, PETRI_TRANSITIONS=411} [2024-06-03 19:40:13,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-03 19:40:13,337 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 411 transitions, 6472 flow [2024-06-03 19:40:13,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:13,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:13,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:13,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:40:13,338 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:13,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -972978381, now seen corresponding path program 2 times [2024-06-03 19:40:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067608945] [2024-06-03 19:40:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067608945] [2024-06-03 19:40:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067608945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:14,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:14,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343939972] [2024-06-03 19:40:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 411 transitions, 6472 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:15,833 INFO L124 PetriNetUnfolderBase]: 5603/8845 cut-off events. [2024-06-03 19:40:15,833 INFO L125 PetriNetUnfolderBase]: For 378071/378183 co-relation queries the response was YES. [2024-06-03 19:40:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67265 conditions, 8845 events. 5603/8845 cut-off events. For 378071/378183 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 56288 event pairs, 2719 based on Foata normal form. 36/8852 useless extension candidates. Maximal degree in co-relation 67162. Up to 8508 conditions per place. [2024-06-03 19:40:15,930 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 365 selfloop transitions, 41 changer transitions 0/430 dead transitions. [2024-06-03 19:40:15,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 430 transitions, 7475 flow [2024-06-03 19:40:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:40:15,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-03 19:40:15,932 INFO L175 Difference]: Start difference. First operand has 231 places, 411 transitions, 6472 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:40:15,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 430 transitions, 7475 flow [2024-06-03 19:40:16,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 430 transitions, 7038 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-03 19:40:16,559 INFO L231 Difference]: Finished difference. Result has 231 places, 417 transitions, 6194 flow [2024-06-03 19:40:16,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6037, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6194, PETRI_PLACES=231, PETRI_TRANSITIONS=417} [2024-06-03 19:40:16,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-03 19:40:16,560 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 417 transitions, 6194 flow [2024-06-03 19:40:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:16,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:16,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:40:16,561 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)] === [2024-06-03 19:40:16,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash 514770260, now seen corresponding path program 9 times [2024-06-03 19:40:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:16,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936793929] [2024-06-03 19:40:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:17,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:17,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936793929] [2024-06-03 19:40:17,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936793929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:17,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:17,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:17,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415400050] [2024-06-03 19:40:17,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:17,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:17,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:17,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:17,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 417 transitions, 6194 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:17,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:17,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:17,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:19,598 INFO L124 PetriNetUnfolderBase]: 5776/9097 cut-off events. [2024-06-03 19:40:19,599 INFO L125 PetriNetUnfolderBase]: For 370641/370641 co-relation queries the response was YES. [2024-06-03 19:40:19,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68215 conditions, 9097 events. 5776/9097 cut-off events. For 370641/370641 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 57685 event pairs, 2704 based on Foata normal form. 4/9095 useless extension candidates. Maximal degree in co-relation 68112. Up to 8596 conditions per place. [2024-06-03 19:40:19,693 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 70 changer transitions 0/475 dead transitions. [2024-06-03 19:40:19,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 475 transitions, 7712 flow [2024-06-03 19:40:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:40:19,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:40:19,695 INFO L175 Difference]: Start difference. First operand has 231 places, 417 transitions, 6194 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:40:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 475 transitions, 7712 flow [2024-06-03 19:40:20,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 475 transitions, 7627 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:20,370 INFO L231 Difference]: Finished difference. Result has 236 places, 435 transitions, 6599 flow [2024-06-03 19:40:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6599, PETRI_PLACES=236, PETRI_TRANSITIONS=435} [2024-06-03 19:40:20,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-03 19:40:20,371 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 435 transitions, 6599 flow [2024-06-03 19:40:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:20,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:40:20,371 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)] === [2024-06-03 19:40:20,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1854562400, now seen corresponding path program 10 times [2024-06-03 19:40:20,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:20,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605553371] [2024-06-03 19:40:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:21,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605553371] [2024-06-03 19:40:21,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605553371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:21,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567649793] [2024-06-03 19:40:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:21,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:21,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:21,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 435 transitions, 6599 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:21,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:21,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:21,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:23,810 INFO L124 PetriNetUnfolderBase]: 5818/9163 cut-off events. [2024-06-03 19:40:23,811 INFO L125 PetriNetUnfolderBase]: For 395294/395294 co-relation queries the response was YES. [2024-06-03 19:40:23,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70187 conditions, 9163 events. 5818/9163 cut-off events. For 395294/395294 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 58156 event pairs, 2719 based on Foata normal form. 4/9161 useless extension candidates. Maximal degree in co-relation 70082. Up to 8585 conditions per place. [2024-06-03 19:40:23,906 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 74 changer transitions 0/479 dead transitions. [2024-06-03 19:40:23,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 479 transitions, 8115 flow [2024-06-03 19:40:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:40:23,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:40:23,907 INFO L175 Difference]: Start difference. First operand has 236 places, 435 transitions, 6599 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:40:23,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 479 transitions, 8115 flow [2024-06-03 19:40:24,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 479 transitions, 7913 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:24,665 INFO L231 Difference]: Finished difference. Result has 241 places, 439 transitions, 6720 flow [2024-06-03 19:40:24,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6720, PETRI_PLACES=241, PETRI_TRANSITIONS=439} [2024-06-03 19:40:24,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-03 19:40:24,666 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 439 transitions, 6720 flow [2024-06-03 19:40:24,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:24,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:24,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:40:24,667 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)] === [2024-06-03 19:40:24,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash 509407880, now seen corresponding path program 11 times [2024-06-03 19:40:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:24,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321970333] [2024-06-03 19:40:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321970333] [2024-06-03 19:40:25,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321970333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:25,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:25,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:40:25,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237972087] [2024-06-03 19:40:25,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:25,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:40:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:40:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:40:26,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:26,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 439 transitions, 6720 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:26,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:26,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:26,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:27,944 INFO L124 PetriNetUnfolderBase]: 5810/9152 cut-off events. [2024-06-03 19:40:27,944 INFO L125 PetriNetUnfolderBase]: For 402950/402950 co-relation queries the response was YES. [2024-06-03 19:40:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69680 conditions, 9152 events. 5810/9152 cut-off events. For 402950/402950 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 58055 event pairs, 2687 based on Foata normal form. 4/9150 useless extension candidates. Maximal degree in co-relation 69574. Up to 8650 conditions per place. [2024-06-03 19:40:28,030 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 393 selfloop transitions, 73 changer transitions 0/475 dead transitions. [2024-06-03 19:40:28,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 475 transitions, 7873 flow [2024-06-03 19:40:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:40:28,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:40:28,032 INFO L175 Difference]: Start difference. First operand has 241 places, 439 transitions, 6720 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:40:28,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 475 transitions, 7873 flow [2024-06-03 19:40:28,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 475 transitions, 7651 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:28,647 INFO L231 Difference]: Finished difference. Result has 245 places, 439 transitions, 6653 flow [2024-06-03 19:40:28,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6498, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6653, PETRI_PLACES=245, PETRI_TRANSITIONS=439} [2024-06-03 19:40:28,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-03 19:40:28,648 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 439 transitions, 6653 flow [2024-06-03 19:40:28,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:28,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:28,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:28,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:40:28,648 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:28,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:28,648 INFO L85 PathProgramCache]: Analyzing trace with hash -753526362, now seen corresponding path program 12 times [2024-06-03 19:40:28,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:28,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007008143] [2024-06-03 19:40:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:28,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007008143] [2024-06-03 19:40:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007008143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:29,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507502536] [2024-06-03 19:40:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:30,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:30,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 439 transitions, 6653 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:30,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:30,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:30,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:31,881 INFO L124 PetriNetUnfolderBase]: 5827/9180 cut-off events. [2024-06-03 19:40:31,881 INFO L125 PetriNetUnfolderBase]: For 414110/414110 co-relation queries the response was YES. [2024-06-03 19:40:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70092 conditions, 9180 events. 5827/9180 cut-off events. For 414110/414110 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 58325 event pairs, 2728 based on Foata normal form. 4/9178 useless extension candidates. Maximal degree in co-relation 69984. Up to 8761 conditions per place. [2024-06-03 19:40:31,993 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 47 changer transitions 0/475 dead transitions. [2024-06-03 19:40:31,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 475 transitions, 7877 flow [2024-06-03 19:40:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:40:31,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:40:31,994 INFO L175 Difference]: Start difference. First operand has 245 places, 439 transitions, 6653 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:40:31,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 475 transitions, 7877 flow [2024-06-03 19:40:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 475 transitions, 7677 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 19:40:32,894 INFO L231 Difference]: Finished difference. Result has 245 places, 441 transitions, 6648 flow [2024-06-03 19:40:32,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6648, PETRI_PLACES=245, PETRI_TRANSITIONS=441} [2024-06-03 19:40:32,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-03 19:40:32,895 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 441 transitions, 6648 flow [2024-06-03 19:40:32,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:32,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:32,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:40:32,895 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)] === [2024-06-03 19:40:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:32,895 INFO L85 PathProgramCache]: Analyzing trace with hash -213037568, now seen corresponding path program 13 times [2024-06-03 19:40:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:32,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56413746] [2024-06-03 19:40:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:34,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56413746] [2024-06-03 19:40:34,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56413746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:34,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254626548] [2024-06-03 19:40:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:34,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:34,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:34,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 441 transitions, 6648 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:34,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:34,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:34,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:36,054 INFO L124 PetriNetUnfolderBase]: 5844/9208 cut-off events. [2024-06-03 19:40:36,054 INFO L125 PetriNetUnfolderBase]: For 430790/430790 co-relation queries the response was YES. [2024-06-03 19:40:36,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70671 conditions, 9208 events. 5844/9208 cut-off events. For 430790/430790 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 58545 event pairs, 2736 based on Foata normal form. 4/9206 useless extension candidates. Maximal degree in co-relation 70563. Up to 8733 conditions per place. [2024-06-03 19:40:36,167 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 48 changer transitions 0/476 dead transitions. [2024-06-03 19:40:36,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 476 transitions, 7869 flow [2024-06-03 19:40:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:40:36,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:40:36,169 INFO L175 Difference]: Start difference. First operand has 245 places, 441 transitions, 6648 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:40:36,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 476 transitions, 7869 flow [2024-06-03 19:40:37,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 476 transitions, 7700 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:37,135 INFO L231 Difference]: Finished difference. Result has 247 places, 443 transitions, 6676 flow [2024-06-03 19:40:37,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6479, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6676, PETRI_PLACES=247, PETRI_TRANSITIONS=443} [2024-06-03 19:40:37,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-03 19:40:37,136 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 443 transitions, 6676 flow [2024-06-03 19:40:37,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:37,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:37,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:37,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:40:37,137 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)] === [2024-06-03 19:40:37,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash -203840798, now seen corresponding path program 14 times [2024-06-03 19:40:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:37,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520332314] [2024-06-03 19:40:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:38,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520332314] [2024-06-03 19:40:38,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520332314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:38,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:38,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172408000] [2024-06-03 19:40:38,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:38,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:38,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:38,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:38,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 443 transitions, 6676 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:38,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:38,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:40,165 INFO L124 PetriNetUnfolderBase]: 5836/9186 cut-off events. [2024-06-03 19:40:40,165 INFO L125 PetriNetUnfolderBase]: For 439228/439228 co-relation queries the response was YES. [2024-06-03 19:40:40,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70564 conditions, 9186 events. 5836/9186 cut-off events. For 439228/439228 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 58065 event pairs, 2715 based on Foata normal form. 4/9184 useless extension candidates. Maximal degree in co-relation 70455. Up to 8837 conditions per place. [2024-06-03 19:40:40,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 445 selfloop transitions, 20 changer transitions 0/474 dead transitions. [2024-06-03 19:40:40,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 474 transitions, 7844 flow [2024-06-03 19:40:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:40:40,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:40:40,268 INFO L175 Difference]: Start difference. First operand has 247 places, 443 transitions, 6676 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:40:40,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 474 transitions, 7844 flow [2024-06-03 19:40:41,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 474 transitions, 7665 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:41,050 INFO L231 Difference]: Finished difference. Result has 249 places, 445 transitions, 6642 flow [2024-06-03 19:40:41,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6642, PETRI_PLACES=249, PETRI_TRANSITIONS=445} [2024-06-03 19:40:41,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-03 19:40:41,051 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 445 transitions, 6642 flow [2024-06-03 19:40:41,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:41,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:41,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:40:41,052 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:41,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -618715341, now seen corresponding path program 3 times [2024-06-03 19:40:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:41,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999792419] [2024-06-03 19:40:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:41,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:41,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999792419] [2024-06-03 19:40:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999792419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:41,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:41,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268264386] [2024-06-03 19:40:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:41,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:42,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:42,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 445 transitions, 6642 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:42,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:42,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:42,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:43,722 INFO L124 PetriNetUnfolderBase]: 5688/8985 cut-off events. [2024-06-03 19:40:43,722 INFO L125 PetriNetUnfolderBase]: For 459530/459646 co-relation queries the response was YES. [2024-06-03 19:40:43,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69391 conditions, 8985 events. 5688/8985 cut-off events. For 459530/459646 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 57377 event pairs, 2711 based on Foata normal form. 33/8975 useless extension candidates. Maximal degree in co-relation 69281. Up to 8688 conditions per place. [2024-06-03 19:40:43,820 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 414 selfloop transitions, 20 changer transitions 0/458 dead transitions. [2024-06-03 19:40:43,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 458 transitions, 7691 flow [2024-06-03 19:40:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-03 19:40:43,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-03 19:40:43,821 INFO L175 Difference]: Start difference. First operand has 249 places, 445 transitions, 6642 flow. Second operand 7 states and 118 transitions. [2024-06-03 19:40:43,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 458 transitions, 7691 flow [2024-06-03 19:40:44,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 458 transitions, 7564 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:44,577 INFO L231 Difference]: Finished difference. Result has 249 places, 448 transitions, 6608 flow [2024-06-03 19:40:44,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6608, PETRI_PLACES=249, PETRI_TRANSITIONS=448} [2024-06-03 19:40:44,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-03 19:40:44,578 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 448 transitions, 6608 flow [2024-06-03 19:40:44,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:44,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:44,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:44,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:40:44,579 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:44,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -618299631, now seen corresponding path program 4 times [2024-06-03 19:40:44,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:44,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388705191] [2024-06-03 19:40:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:45,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388705191] [2024-06-03 19:40:45,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388705191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:45,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:45,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:45,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912252583] [2024-06-03 19:40:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:45,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:45,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:45,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 448 transitions, 6608 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:45,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:45,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:45,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:47,033 INFO L124 PetriNetUnfolderBase]: 5682/8977 cut-off events. [2024-06-03 19:40:47,034 INFO L125 PetriNetUnfolderBase]: For 467510/467620 co-relation queries the response was YES. [2024-06-03 19:40:47,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69198 conditions, 8977 events. 5682/8977 cut-off events. For 467510/467620 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 57309 event pairs, 2720 based on Foata normal form. 34/8968 useless extension candidates. Maximal degree in co-relation 69087. Up to 8689 conditions per place. [2024-06-03 19:40:47,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 418 selfloop transitions, 15 changer transitions 0/457 dead transitions. [2024-06-03 19:40:47,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 457 transitions, 7508 flow [2024-06-03 19:40:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:40:47,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-03 19:40:47,144 INFO L175 Difference]: Start difference. First operand has 249 places, 448 transitions, 6608 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:40:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 457 transitions, 7508 flow [2024-06-03 19:40:48,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 457 transitions, 7396 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:48,114 INFO L231 Difference]: Finished difference. Result has 251 places, 448 transitions, 6532 flow [2024-06-03 19:40:48,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6532, PETRI_PLACES=251, PETRI_TRANSITIONS=448} [2024-06-03 19:40:48,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-03 19:40:48,115 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 448 transitions, 6532 flow [2024-06-03 19:40:48,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:48,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:48,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:40:48,116 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:48,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -795782505, now seen corresponding path program 1 times [2024-06-03 19:40:48,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:48,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303389260] [2024-06-03 19:40:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:49,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303389260] [2024-06-03 19:40:49,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303389260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:49,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:49,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:49,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915242744] [2024-06-03 19:40:49,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:49,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:49,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:49,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:49,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:49,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 448 transitions, 6532 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:49,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:49,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:50,849 INFO L124 PetriNetUnfolderBase]: 5848/9213 cut-off events. [2024-06-03 19:40:50,850 INFO L125 PetriNetUnfolderBase]: For 470836/470836 co-relation queries the response was YES. [2024-06-03 19:40:50,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70816 conditions, 9213 events. 5848/9213 cut-off events. For 470836/470836 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58575 event pairs, 2742 based on Foata normal form. 2/9209 useless extension candidates. Maximal degree in co-relation 70704. Up to 8911 conditions per place. [2024-06-03 19:40:50,957 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 440 selfloop transitions, 17 changer transitions 0/467 dead transitions. [2024-06-03 19:40:50,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 467 transitions, 7566 flow [2024-06-03 19:40:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:50,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:40:50,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-03 19:40:50,958 INFO L175 Difference]: Start difference. First operand has 251 places, 448 transitions, 6532 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:40:50,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 467 transitions, 7566 flow [2024-06-03 19:40:51,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 467 transitions, 7520 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:51,947 INFO L231 Difference]: Finished difference. Result has 252 places, 451 transitions, 6573 flow [2024-06-03 19:40:51,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6486, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6573, PETRI_PLACES=252, PETRI_TRANSITIONS=451} [2024-06-03 19:40:51,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-03 19:40:51,947 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 451 transitions, 6573 flow [2024-06-03 19:40:51,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:51,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:51,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:51,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:40:51,948 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:51,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash -647236129, now seen corresponding path program 2 times [2024-06-03 19:40:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:51,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116963959] [2024-06-03 19:40:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:51,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116963959] [2024-06-03 19:40:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116963959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:52,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820901087] [2024-06-03 19:40:52,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:52,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:52,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 451 transitions, 6573 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:54,599 INFO L124 PetriNetUnfolderBase]: 5858/9235 cut-off events. [2024-06-03 19:40:54,599 INFO L125 PetriNetUnfolderBase]: For 475555/475555 co-relation queries the response was YES. [2024-06-03 19:40:54,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71366 conditions, 9235 events. 5858/9235 cut-off events. For 475555/475555 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58688 event pairs, 2743 based on Foata normal form. 2/9235 useless extension candidates. Maximal degree in co-relation 71253. Up to 8901 conditions per place. [2024-06-03 19:40:54,708 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 434 selfloop transitions, 29 changer transitions 0/473 dead transitions. [2024-06-03 19:40:54,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 473 transitions, 7767 flow [2024-06-03 19:40:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:54,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:40:54,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:40:54,709 INFO L175 Difference]: Start difference. First operand has 252 places, 451 transitions, 6573 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:40:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 473 transitions, 7767 flow [2024-06-03 19:40:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 473 transitions, 7697 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:55,644 INFO L231 Difference]: Finished difference. Result has 253 places, 457 transitions, 6665 flow [2024-06-03 19:40:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6665, PETRI_PLACES=253, PETRI_TRANSITIONS=457} [2024-06-03 19:40:55,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-03 19:40:55,645 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 457 transitions, 6665 flow [2024-06-03 19:40:55,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:55,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:55,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:40:55,645 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:55,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -795662349, now seen corresponding path program 1 times [2024-06-03 19:40:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:55,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6451743] [2024-06-03 19:40:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6451743] [2024-06-03 19:40:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6451743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:56,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399161638] [2024-06-03 19:40:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:56,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:56,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:56,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:40:56,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 457 transitions, 6665 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:56,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:56,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:40:56,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:58,416 INFO L124 PetriNetUnfolderBase]: 5985/9364 cut-off events. [2024-06-03 19:40:58,416 INFO L125 PetriNetUnfolderBase]: For 490971/490971 co-relation queries the response was YES. [2024-06-03 19:40:58,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72878 conditions, 9364 events. 5985/9364 cut-off events. For 490971/490971 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58873 event pairs, 2817 based on Foata normal form. 1/9363 useless extension candidates. Maximal degree in co-relation 72765. Up to 9178 conditions per place. [2024-06-03 19:40:58,518 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 449 selfloop transitions, 24 changer transitions 0/476 dead transitions. [2024-06-03 19:40:58,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 476 transitions, 7851 flow [2024-06-03 19:40:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:40:58,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-03 19:40:58,519 INFO L175 Difference]: Start difference. First operand has 253 places, 457 transitions, 6665 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:40:58,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 476 transitions, 7851 flow [2024-06-03 19:40:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 476 transitions, 7789 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:59,348 INFO L231 Difference]: Finished difference. Result has 257 places, 463 transitions, 6743 flow [2024-06-03 19:40:59,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6603, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6743, PETRI_PLACES=257, PETRI_TRANSITIONS=463} [2024-06-03 19:40:59,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-03 19:40:59,349 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 463 transitions, 6743 flow [2024-06-03 19:40:59,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:59,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:59,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:59,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:40:59,350 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:59,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 718499283, now seen corresponding path program 2 times [2024-06-03 19:40:59,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:59,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690675569] [2024-06-03 19:40:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690675569] [2024-06-03 19:41:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690675569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:00,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:00,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:00,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168933356] [2024-06-03 19:41:00,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:00,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:00,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:41:00,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 463 transitions, 6743 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:00,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:00,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:41:00,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:02,153 INFO L124 PetriNetUnfolderBase]: 5990/9372 cut-off events. [2024-06-03 19:41:02,153 INFO L125 PetriNetUnfolderBase]: For 508470/508473 co-relation queries the response was YES. [2024-06-03 19:41:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73804 conditions, 9372 events. 5990/9372 cut-off events. For 508470/508473 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58935 event pairs, 2819 based on Foata normal form. 3/9372 useless extension candidates. Maximal degree in co-relation 73689. Up to 9184 conditions per place. [2024-06-03 19:41:02,268 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 29 changer transitions 0/476 dead transitions. [2024-06-03 19:41:02,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 476 transitions, 7877 flow [2024-06-03 19:41:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-03 19:41:02,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-03 19:41:02,270 INFO L175 Difference]: Start difference. First operand has 257 places, 463 transitions, 6743 flow. Second operand 8 states and 122 transitions. [2024-06-03 19:41:02,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 476 transitions, 7877 flow [2024-06-03 19:41:03,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 476 transitions, 7804 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:03,442 INFO L231 Difference]: Finished difference. Result has 262 places, 466 transitions, 6780 flow [2024-06-03 19:41:03,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6780, PETRI_PLACES=262, PETRI_TRANSITIONS=466} [2024-06-03 19:41:03,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-03 19:41:03,443 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 466 transitions, 6780 flow [2024-06-03 19:41:03,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:03,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:03,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:41:03,444 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:03,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 238559577, now seen corresponding path program 3 times [2024-06-03 19:41:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:03,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256568999] [2024-06-03 19:41:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:04,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:04,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256568999] [2024-06-03 19:41:04,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256568999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:04,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:04,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:04,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941236923] [2024-06-03 19:41:04,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:04,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:04,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:04,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:04,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:04,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 466 transitions, 6780 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:04,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:04,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:04,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:06,305 INFO L124 PetriNetUnfolderBase]: 5874/9254 cut-off events. [2024-06-03 19:41:06,305 INFO L125 PetriNetUnfolderBase]: For 522567/522570 co-relation queries the response was YES. [2024-06-03 19:41:06,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73319 conditions, 9254 events. 5874/9254 cut-off events. For 522567/522570 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 58778 event pairs, 2758 based on Foata normal form. 2/9253 useless extension candidates. Maximal degree in co-relation 73202. Up to 8918 conditions per place. [2024-06-03 19:41:06,418 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 435 selfloop transitions, 29 changer transitions 0/477 dead transitions. [2024-06-03 19:41:06,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 477 transitions, 7754 flow [2024-06-03 19:41:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:41:06,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-03 19:41:06,419 INFO L175 Difference]: Start difference. First operand has 262 places, 466 transitions, 6780 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:41:06,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 477 transitions, 7754 flow [2024-06-03 19:41:07,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 477 transitions, 7662 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:07,485 INFO L231 Difference]: Finished difference. Result has 264 places, 466 transitions, 6752 flow [2024-06-03 19:41:07,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6752, PETRI_PLACES=264, PETRI_TRANSITIONS=466} [2024-06-03 19:41:07,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-03 19:41:07,485 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 466 transitions, 6752 flow [2024-06-03 19:41:07,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:07,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:07,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:07,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:41:07,486 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash 238559763, now seen corresponding path program 3 times [2024-06-03 19:41:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459742527] [2024-06-03 19:41:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:08,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:08,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459742527] [2024-06-03 19:41:08,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459742527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:08,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:08,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742044835] [2024-06-03 19:41:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:08,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:08,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:08,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:41:08,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 466 transitions, 6752 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:08,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:08,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:41:08,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:10,135 INFO L124 PetriNetUnfolderBase]: 5981/9360 cut-off events. [2024-06-03 19:41:10,135 INFO L125 PetriNetUnfolderBase]: For 532383/532386 co-relation queries the response was YES. [2024-06-03 19:41:10,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74074 conditions, 9360 events. 5981/9360 cut-off events. For 532383/532386 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58894 event pairs, 2818 based on Foata normal form. 3/9360 useless extension candidates. Maximal degree in co-relation 73956. Up to 9173 conditions per place. [2024-06-03 19:41:10,249 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 445 selfloop transitions, 27 changer transitions 0/475 dead transitions. [2024-06-03 19:41:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 475 transitions, 7730 flow [2024-06-03 19:41:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:41:10,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-03 19:41:10,250 INFO L175 Difference]: Start difference. First operand has 264 places, 466 transitions, 6752 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:41:10,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 475 transitions, 7730 flow [2024-06-03 19:41:11,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 475 transitions, 7632 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:11,319 INFO L231 Difference]: Finished difference. Result has 265 places, 466 transitions, 6714 flow [2024-06-03 19:41:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6714, PETRI_PLACES=265, PETRI_TRANSITIONS=466} [2024-06-03 19:41:11,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-03 19:41:11,320 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 466 transitions, 6714 flow [2024-06-03 19:41:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:41:11,320 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)] === [2024-06-03 19:41:11,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1705172110, now seen corresponding path program 1 times [2024-06-03 19:41:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881704268] [2024-06-03 19:41:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:12,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:12,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881704268] [2024-06-03 19:41:12,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881704268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:12,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:12,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:12,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535635091] [2024-06-03 19:41:12,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:12,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:12,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:12,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 466 transitions, 6714 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:12,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:12,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:12,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:14,147 INFO L124 PetriNetUnfolderBase]: 5890/9268 cut-off events. [2024-06-03 19:41:14,147 INFO L125 PetriNetUnfolderBase]: For 550009/550015 co-relation queries the response was YES. [2024-06-03 19:41:14,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73953 conditions, 9268 events. 5890/9268 cut-off events. For 550009/550015 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 58811 event pairs, 2361 based on Foata normal form. 5/9266 useless extension candidates. Maximal degree in co-relation 73834. Up to 8825 conditions per place. [2024-06-03 19:41:14,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 436 selfloop transitions, 63 changer transitions 0/512 dead transitions. [2024-06-03 19:41:14,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 512 transitions, 8166 flow [2024-06-03 19:41:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:41:14,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:41:14,251 INFO L175 Difference]: Start difference. First operand has 265 places, 466 transitions, 6714 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:41:14,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 512 transitions, 8166 flow [2024-06-03 19:41:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 512 transitions, 8090 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:15,440 INFO L231 Difference]: Finished difference. Result has 267 places, 485 transitions, 7009 flow [2024-06-03 19:41:15,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6638, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7009, PETRI_PLACES=267, PETRI_TRANSITIONS=485} [2024-06-03 19:41:15,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-03 19:41:15,441 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 485 transitions, 7009 flow [2024-06-03 19:41:15,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:15,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:15,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:15,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:41:15,442 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:15,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 588109195, now seen corresponding path program 1 times [2024-06-03 19:41:15,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:15,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827642095] [2024-06-03 19:41:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:16,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827642095] [2024-06-03 19:41:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827642095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:16,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:16,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:41:16,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051332082] [2024-06-03 19:41:16,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:16,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:41:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:41:16,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:41:17,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:17,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 485 transitions, 7009 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:17,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:17,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:17,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:19,225 INFO L124 PetriNetUnfolderBase]: 6008/9462 cut-off events. [2024-06-03 19:41:19,225 INFO L125 PetriNetUnfolderBase]: For 601474/601478 co-relation queries the response was YES. [2024-06-03 19:41:19,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76359 conditions, 9462 events. 6008/9462 cut-off events. For 601474/601478 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 60180 event pairs, 2238 based on Foata normal form. 28/9488 useless extension candidates. Maximal degree in co-relation 76238. Up to 8848 conditions per place. [2024-06-03 19:41:19,334 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 462 selfloop transitions, 56 changer transitions 0/531 dead transitions. [2024-06-03 19:41:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 531 transitions, 8366 flow [2024-06-03 19:41:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:41:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:41:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-03 19:41:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:41:19,335 INFO L175 Difference]: Start difference. First operand has 267 places, 485 transitions, 7009 flow. Second operand 11 states and 198 transitions. [2024-06-03 19:41:19,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 531 transitions, 8366 flow [2024-06-03 19:41:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 531 transitions, 8296 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:20,526 INFO L231 Difference]: Finished difference. Result has 275 places, 489 transitions, 7215 flow [2024-06-03 19:41:20,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6940, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7215, PETRI_PLACES=275, PETRI_TRANSITIONS=489} [2024-06-03 19:41:20,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-03 19:41:20,527 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 489 transitions, 7215 flow [2024-06-03 19:41:20,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:20,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:20,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:20,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:41:20,527 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)] === [2024-06-03 19:41:20,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1319633044, now seen corresponding path program 1 times [2024-06-03 19:41:20,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:20,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455191372] [2024-06-03 19:41:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455191372] [2024-06-03 19:41:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455191372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:21,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:21,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367430926] [2024-06-03 19:41:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:21,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:21,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:21,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 489 transitions, 7215 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:21,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:21,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:21,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:23,540 INFO L124 PetriNetUnfolderBase]: 6029/9493 cut-off events. [2024-06-03 19:41:23,541 INFO L125 PetriNetUnfolderBase]: For 592455/592462 co-relation queries the response was YES. [2024-06-03 19:41:23,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77281 conditions, 9493 events. 6029/9493 cut-off events. For 592455/592462 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 60582 event pairs, 2429 based on Foata normal form. 7/9497 useless extension candidates. Maximal degree in co-relation 77158. Up to 9112 conditions per place. [2024-06-03 19:41:23,637 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 464 selfloop transitions, 52 changer transitions 0/529 dead transitions. [2024-06-03 19:41:23,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 529 transitions, 8912 flow [2024-06-03 19:41:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:41:23,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:41:23,638 INFO L175 Difference]: Start difference. First operand has 275 places, 489 transitions, 7215 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:41:23,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 529 transitions, 8912 flow [2024-06-03 19:41:24,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 529 transitions, 8732 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 19:41:24,713 INFO L231 Difference]: Finished difference. Result has 276 places, 505 transitions, 7392 flow [2024-06-03 19:41:24,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7392, PETRI_PLACES=276, PETRI_TRANSITIONS=505} [2024-06-03 19:41:24,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-03 19:41:24,714 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 505 transitions, 7392 flow [2024-06-03 19:41:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:24,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:24,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:41:24,714 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:24,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 587514549, now seen corresponding path program 2 times [2024-06-03 19:41:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449152782] [2024-06-03 19:41:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:26,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:26,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449152782] [2024-06-03 19:41:26,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449152782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:26,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:26,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:41:26,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320616645] [2024-06-03 19:41:26,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:26,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:41:26,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:41:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:41:26,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:26,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 505 transitions, 7392 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:26,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:26,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:26,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:28,719 INFO L124 PetriNetUnfolderBase]: 6070/9568 cut-off events. [2024-06-03 19:41:28,719 INFO L125 PetriNetUnfolderBase]: For 623604/623616 co-relation queries the response was YES. [2024-06-03 19:41:28,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78190 conditions, 9568 events. 6070/9568 cut-off events. For 623604/623616 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61021 event pairs, 2007 based on Foata normal form. 20/9585 useless extension candidates. Maximal degree in co-relation 78065. Up to 8569 conditions per place. [2024-06-03 19:41:28,818 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 351 selfloop transitions, 192 changer transitions 0/556 dead transitions. [2024-06-03 19:41:28,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 556 transitions, 8805 flow [2024-06-03 19:41:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:41:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:41:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 19:41:28,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-03 19:41:28,820 INFO L175 Difference]: Start difference. First operand has 276 places, 505 transitions, 7392 flow. Second operand 11 states and 211 transitions. [2024-06-03 19:41:28,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 556 transitions, 8805 flow [2024-06-03 19:41:30,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 556 transitions, 8687 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:30,046 INFO L231 Difference]: Finished difference. Result has 284 places, 506 transitions, 7724 flow [2024-06-03 19:41:30,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7724, PETRI_PLACES=284, PETRI_TRANSITIONS=506} [2024-06-03 19:41:30,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-03 19:41:30,046 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 506 transitions, 7724 flow [2024-06-03 19:41:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:30,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:30,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:30,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:41:30,047 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)] === [2024-06-03 19:41:30,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:30,047 INFO L85 PathProgramCache]: Analyzing trace with hash 760004439, now seen corresponding path program 3 times [2024-06-03 19:41:30,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:30,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457266323] [2024-06-03 19:41:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:30,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:31,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457266323] [2024-06-03 19:41:31,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457266323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:41:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089556870] [2024-06-03 19:41:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:31,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:41:31,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:41:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:41:31,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:31,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 506 transitions, 7724 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:31,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:31,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:31,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:33,984 INFO L124 PetriNetUnfolderBase]: 6111/9637 cut-off events. [2024-06-03 19:41:33,984 INFO L125 PetriNetUnfolderBase]: For 644353/644365 co-relation queries the response was YES. [2024-06-03 19:41:34,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79124 conditions, 9637 events. 6111/9637 cut-off events. For 644353/644365 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 61608 event pairs, 1986 based on Foata normal form. 20/9654 useless extension candidates. Maximal degree in co-relation 78998. Up to 8640 conditions per place. [2024-06-03 19:41:34,109 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 194 changer transitions 0/557 dead transitions. [2024-06-03 19:41:34,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 557 transitions, 9144 flow [2024-06-03 19:41:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:41:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:41:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-03 19:41:34,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:41:34,111 INFO L175 Difference]: Start difference. First operand has 284 places, 506 transitions, 7724 flow. Second operand 11 states and 209 transitions. [2024-06-03 19:41:34,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 557 transitions, 9144 flow [2024-06-03 19:41:35,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 557 transitions, 8712 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:35,370 INFO L231 Difference]: Finished difference. Result has 286 places, 507 transitions, 7748 flow [2024-06-03 19:41:35,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7292, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7748, PETRI_PLACES=286, PETRI_TRANSITIONS=507} [2024-06-03 19:41:35,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:41:35,371 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 507 transitions, 7748 flow [2024-06-03 19:41:35,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:35,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:35,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:41:35,372 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)] === [2024-06-03 19:41:35,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2101497827, now seen corresponding path program 4 times [2024-06-03 19:41:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689940328] [2024-06-03 19:41:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:36,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:36,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689940328] [2024-06-03 19:41:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689940328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:36,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:36,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:41:36,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364490201] [2024-06-03 19:41:36,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:36,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:41:36,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:41:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:41:36,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:36,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 507 transitions, 7748 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:36,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:36,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:36,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:39,158 INFO L124 PetriNetUnfolderBase]: 6152/9712 cut-off events. [2024-06-03 19:41:39,159 INFO L125 PetriNetUnfolderBase]: For 663687/663699 co-relation queries the response was YES. [2024-06-03 19:41:39,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79762 conditions, 9712 events. 6152/9712 cut-off events. For 663687/663699 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62326 event pairs, 1985 based on Foata normal form. 20/9729 useless extension candidates. Maximal degree in co-relation 79635. Up to 8582 conditions per place. [2024-06-03 19:41:39,275 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 339 selfloop transitions, 207 changer transitions 0/559 dead transitions. [2024-06-03 19:41:39,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 559 transitions, 9176 flow [2024-06-03 19:41:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:41:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:41:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-03 19:41:39,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:41:39,276 INFO L175 Difference]: Start difference. First operand has 286 places, 507 transitions, 7748 flow. Second operand 11 states and 209 transitions. [2024-06-03 19:41:39,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 559 transitions, 9176 flow [2024-06-03 19:41:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 559 transitions, 8738 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:40,614 INFO L231 Difference]: Finished difference. Result has 288 places, 508 transitions, 7794 flow [2024-06-03 19:41:40,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7794, PETRI_PLACES=288, PETRI_TRANSITIONS=508} [2024-06-03 19:41:40,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-03 19:41:40,615 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 508 transitions, 7794 flow [2024-06-03 19:41:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:40,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:40,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:41:40,615 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:40,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 119315266, now seen corresponding path program 2 times [2024-06-03 19:41:40,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:40,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880754117] [2024-06-03 19:41:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:41,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880754117] [2024-06-03 19:41:41,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880754117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:41,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:41,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392272748] [2024-06-03 19:41:41,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:41,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:41,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 508 transitions, 7794 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:41,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:43,759 INFO L124 PetriNetUnfolderBase]: 6149/9705 cut-off events. [2024-06-03 19:41:43,759 INFO L125 PetriNetUnfolderBase]: For 661543/661550 co-relation queries the response was YES. [2024-06-03 19:41:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79783 conditions, 9705 events. 6149/9705 cut-off events. For 661543/661550 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 62446 event pairs, 2493 based on Foata normal form. 7/9709 useless extension candidates. Maximal degree in co-relation 79655. Up to 9322 conditions per place. [2024-06-03 19:41:43,866 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 461 selfloop transitions, 54 changer transitions 0/528 dead transitions. [2024-06-03 19:41:43,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 528 transitions, 9148 flow [2024-06-03 19:41:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:41:43,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:41:43,867 INFO L175 Difference]: Start difference. First operand has 288 places, 508 transitions, 7794 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:41:43,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 528 transitions, 9148 flow [2024-06-03 19:41:45,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 528 transitions, 8670 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:45,030 INFO L231 Difference]: Finished difference. Result has 287 places, 508 transitions, 7431 flow [2024-06-03 19:41:45,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7431, PETRI_PLACES=287, PETRI_TRANSITIONS=508} [2024-06-03 19:41:45,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-03 19:41:45,031 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 508 transitions, 7431 flow [2024-06-03 19:41:45,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:45,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:45,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:41:45,031 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:45,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1323446292, now seen corresponding path program 2 times [2024-06-03 19:41:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:45,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249809593] [2024-06-03 19:41:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:45,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:45,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249809593] [2024-06-03 19:41:45,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249809593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:45,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:45,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24473962] [2024-06-03 19:41:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:46,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:46,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 508 transitions, 7431 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:46,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:46,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:46,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:48,117 INFO L124 PetriNetUnfolderBase]: 6177/9748 cut-off events. [2024-06-03 19:41:48,118 INFO L125 PetriNetUnfolderBase]: For 671301/671309 co-relation queries the response was YES. [2024-06-03 19:41:48,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79369 conditions, 9748 events. 6177/9748 cut-off events. For 671301/671309 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 62693 event pairs, 2364 based on Foata normal form. 9/9755 useless extension candidates. Maximal degree in co-relation 79240. Up to 9337 conditions per place. [2024-06-03 19:41:48,245 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 75 changer transitions 0/552 dead transitions. [2024-06-03 19:41:48,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 552 transitions, 8916 flow [2024-06-03 19:41:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:41:48,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:41:48,247 INFO L175 Difference]: Start difference. First operand has 287 places, 508 transitions, 7431 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:41:48,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 552 transitions, 8916 flow [2024-06-03 19:41:49,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 552 transitions, 8814 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:49,520 INFO L231 Difference]: Finished difference. Result has 291 places, 524 transitions, 7670 flow [2024-06-03 19:41:49,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7670, PETRI_PLACES=291, PETRI_TRANSITIONS=524} [2024-06-03 19:41:49,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 19:41:49,521 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 524 transitions, 7670 flow [2024-06-03 19:41:49,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:49,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:49,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:49,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:41:49,522 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:49,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:49,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1314240222, now seen corresponding path program 3 times [2024-06-03 19:41:49,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973837968] [2024-06-03 19:41:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:50,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973837968] [2024-06-03 19:41:50,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973837968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:50,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:50,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:50,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753084791] [2024-06-03 19:41:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:50,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:50,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:50,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:50,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 524 transitions, 7670 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:50,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:50,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:50,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:52,721 INFO L124 PetriNetUnfolderBase]: 6192/9767 cut-off events. [2024-06-03 19:41:52,721 INFO L125 PetriNetUnfolderBase]: For 688674/688678 co-relation queries the response was YES. [2024-06-03 19:41:52,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79846 conditions, 9767 events. 6192/9767 cut-off events. For 688674/688678 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 62775 event pairs, 2348 based on Foata normal form. 5/9770 useless extension candidates. Maximal degree in co-relation 79716. Up to 9382 conditions per place. [2024-06-03 19:41:52,848 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 471 selfloop transitions, 72 changer transitions 0/556 dead transitions. [2024-06-03 19:41:52,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 556 transitions, 8970 flow [2024-06-03 19:41:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:41:52,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:41:52,849 INFO L175 Difference]: Start difference. First operand has 291 places, 524 transitions, 7670 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:41:52,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 556 transitions, 8970 flow [2024-06-03 19:41:54,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 556 transitions, 8884 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:54,360 INFO L231 Difference]: Finished difference. Result has 297 places, 533 transitions, 7866 flow [2024-06-03 19:41:54,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7866, PETRI_PLACES=297, PETRI_TRANSITIONS=533} [2024-06-03 19:41:54,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 19:41:54,361 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 533 transitions, 7866 flow [2024-06-03 19:41:54,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:54,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:54,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:54,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:41:54,362 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:54,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash -855439602, now seen corresponding path program 4 times [2024-06-03 19:41:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122624752] [2024-06-03 19:41:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:55,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:55,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122624752] [2024-06-03 19:41:55,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122624752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:55,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:55,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:55,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372051411] [2024-06-03 19:41:55,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:55,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:55,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:55,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:55,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 533 transitions, 7866 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:55,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:55,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:55,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:57,641 INFO L124 PetriNetUnfolderBase]: 6189/9763 cut-off events. [2024-06-03 19:41:57,641 INFO L125 PetriNetUnfolderBase]: For 704366/704375 co-relation queries the response was YES. [2024-06-03 19:41:57,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80160 conditions, 9763 events. 6189/9763 cut-off events. For 704366/704375 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 62713 event pairs, 2245 based on Foata normal form. 9/9770 useless extension candidates. Maximal degree in co-relation 80028. Up to 9381 conditions per place. [2024-06-03 19:41:57,772 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 72 changer transitions 0/553 dead transitions. [2024-06-03 19:41:57,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 553 transitions, 9028 flow [2024-06-03 19:41:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:41:57,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:41:57,774 INFO L175 Difference]: Start difference. First operand has 297 places, 533 transitions, 7866 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:41:57,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 553 transitions, 9028 flow [2024-06-03 19:41:59,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 553 transitions, 8852 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:59,077 INFO L231 Difference]: Finished difference. Result has 300 places, 533 transitions, 7841 flow [2024-06-03 19:41:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7690, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7841, PETRI_PLACES=300, PETRI_TRANSITIONS=533} [2024-06-03 19:41:59,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-03 19:41:59,078 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 533 transitions, 7841 flow [2024-06-03 19:41:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:59,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:59,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:59,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:41:59,078 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:59,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:59,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1313911188, now seen corresponding path program 1 times [2024-06-03 19:41:59,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:59,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422460402] [2024-06-03 19:41:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:59,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:59,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422460402] [2024-06-03 19:41:59,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422460402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:59,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:59,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014729645] [2024-06-03 19:41:59,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:59,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:59,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:59,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:59,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:59,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 533 transitions, 7841 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:59,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:59,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:59,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:02,171 INFO L124 PetriNetUnfolderBase]: 6080/9614 cut-off events. [2024-06-03 19:42:02,171 INFO L125 PetriNetUnfolderBase]: For 730545/730631 co-relation queries the response was YES. [2024-06-03 19:42:02,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79505 conditions, 9614 events. 6080/9614 cut-off events. For 730545/730631 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62081 event pairs, 2245 based on Foata normal form. 19/9595 useless extension candidates. Maximal degree in co-relation 79372. Up to 9158 conditions per place. [2024-06-03 19:42:02,283 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 449 selfloop transitions, 86 changer transitions 0/565 dead transitions. [2024-06-03 19:42:02,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 565 transitions, 9263 flow [2024-06-03 19:42:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:42:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:42:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:42:02,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:42:02,284 INFO L175 Difference]: Start difference. First operand has 300 places, 533 transitions, 7841 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:42:02,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 565 transitions, 9263 flow [2024-06-03 19:42:03,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 565 transitions, 9098 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:03,695 INFO L231 Difference]: Finished difference. Result has 304 places, 542 transitions, 8040 flow [2024-06-03 19:42:03,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7676, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8040, PETRI_PLACES=304, PETRI_TRANSITIONS=542} [2024-06-03 19:42:03,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-03 19:42:03,696 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 542 transitions, 8040 flow [2024-06-03 19:42:03,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:03,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:03,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:03,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:42:03,696 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)] === [2024-06-03 19:42:03,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2093057411, now seen corresponding path program 5 times [2024-06-03 19:42:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:03,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347718172] [2024-06-03 19:42:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:05,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:05,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347718172] [2024-06-03 19:42:05,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347718172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:05,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:05,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:42:05,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837660267] [2024-06-03 19:42:05,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:05,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:42:05,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:05,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:42:05,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:42:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:05,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 542 transitions, 8040 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:05,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:05,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:05,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:08,106 INFO L124 PetriNetUnfolderBase]: 6169/9727 cut-off events. [2024-06-03 19:42:08,106 INFO L125 PetriNetUnfolderBase]: For 739086/739090 co-relation queries the response was YES. [2024-06-03 19:42:08,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79681 conditions, 9727 events. 6169/9727 cut-off events. For 739086/739090 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 62393 event pairs, 2172 based on Foata normal form. 28/9753 useless extension candidates. Maximal degree in co-relation 79545. Up to 8721 conditions per place. [2024-06-03 19:42:08,219 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 486 selfloop transitions, 87 changer transitions 0/586 dead transitions. [2024-06-03 19:42:08,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 586 transitions, 9409 flow [2024-06-03 19:42:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:42:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:42:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:42:08,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:42:08,221 INFO L175 Difference]: Start difference. First operand has 304 places, 542 transitions, 8040 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:42:08,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 586 transitions, 9409 flow [2024-06-03 19:42:09,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 9261 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:09,759 INFO L231 Difference]: Finished difference. Result has 310 places, 542 transitions, 8082 flow [2024-06-03 19:42:09,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8082, PETRI_PLACES=310, PETRI_TRANSITIONS=542} [2024-06-03 19:42:09,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 19:42:09,760 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 542 transitions, 8082 flow [2024-06-03 19:42:09,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:09,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:09,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:42:09,760 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:09,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -107092286, now seen corresponding path program 5 times [2024-06-03 19:42:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:09,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579269483] [2024-06-03 19:42:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:10,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:10,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579269483] [2024-06-03 19:42:10,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579269483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:10,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:10,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449869098] [2024-06-03 19:42:10,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:10,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:10,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:10,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:10,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:11,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:11,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 542 transitions, 8082 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:11,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:11,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:11,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:13,267 INFO L124 PetriNetUnfolderBase]: 6180/9746 cut-off events. [2024-06-03 19:42:13,267 INFO L125 PetriNetUnfolderBase]: For 714630/714639 co-relation queries the response was YES. [2024-06-03 19:42:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80332 conditions, 9746 events. 6180/9746 cut-off events. For 714630/714639 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62661 event pairs, 2425 based on Foata normal form. 9/9748 useless extension candidates. Maximal degree in co-relation 80193. Up to 9287 conditions per place. [2024-06-03 19:42:13,368 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 100 changer transitions 0/575 dead transitions. [2024-06-03 19:42:13,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 575 transitions, 9543 flow [2024-06-03 19:42:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:42:13,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:42:13,369 INFO L175 Difference]: Start difference. First operand has 310 places, 542 transitions, 8082 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:42:13,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 575 transitions, 9543 flow [2024-06-03 19:42:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 575 transitions, 9123 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-03 19:42:14,694 INFO L231 Difference]: Finished difference. Result has 307 places, 548 transitions, 7959 flow [2024-06-03 19:42:14,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7959, PETRI_PLACES=307, PETRI_TRANSITIONS=548} [2024-06-03 19:42:14,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-03 19:42:14,695 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 548 transitions, 7959 flow [2024-06-03 19:42:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:14,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:14,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:14,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:42:14,696 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:14,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash -106823516, now seen corresponding path program 6 times [2024-06-03 19:42:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:14,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712062036] [2024-06-03 19:42:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:14,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:15,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712062036] [2024-06-03 19:42:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712062036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:15,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543692509] [2024-06-03 19:42:15,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:16,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:16,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 548 transitions, 7959 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:16,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:16,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:17,977 INFO L124 PetriNetUnfolderBase]: 6188/9760 cut-off events. [2024-06-03 19:42:17,978 INFO L125 PetriNetUnfolderBase]: For 705405/705409 co-relation queries the response was YES. [2024-06-03 19:42:18,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78274 conditions, 9760 events. 6188/9760 cut-off events. For 705405/705409 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62734 event pairs, 2430 based on Foata normal form. 5/9760 useless extension candidates. Maximal degree in co-relation 78137. Up to 9365 conditions per place. [2024-06-03 19:42:18,120 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 480 selfloop transitions, 82 changer transitions 0/575 dead transitions. [2024-06-03 19:42:18,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 575 transitions, 9278 flow [2024-06-03 19:42:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:42:18,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:42:18,121 INFO L175 Difference]: Start difference. First operand has 307 places, 548 transitions, 7959 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:42:18,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 575 transitions, 9278 flow [2024-06-03 19:42:19,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 575 transitions, 9098 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:19,627 INFO L231 Difference]: Finished difference. Result has 310 places, 554 transitions, 8067 flow [2024-06-03 19:42:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7790, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8067, PETRI_PLACES=310, PETRI_TRANSITIONS=554} [2024-06-03 19:42:19,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 19:42:19,628 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 554 transitions, 8067 flow [2024-06-03 19:42:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:19,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:19,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:42:19,628 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -103279038, now seen corresponding path program 3 times [2024-06-03 19:42:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543954643] [2024-06-03 19:42:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:20,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:20,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543954643] [2024-06-03 19:42:20,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543954643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:20,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:20,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:42:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271689008] [2024-06-03 19:42:20,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:42:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:42:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:42:20,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:20,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 554 transitions, 8067 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:20,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:20,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:20,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:22,638 INFO L124 PetriNetUnfolderBase]: 6207/9785 cut-off events. [2024-06-03 19:42:22,638 INFO L125 PetriNetUnfolderBase]: For 692364/692371 co-relation queries the response was YES. [2024-06-03 19:42:22,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78114 conditions, 9785 events. 6207/9785 cut-off events. For 692364/692371 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62966 event pairs, 2446 based on Foata normal form. 8/9790 useless extension candidates. Maximal degree in co-relation 77977. Up to 9395 conditions per place. [2024-06-03 19:42:22,752 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 507 selfloop transitions, 63 changer transitions 0/583 dead transitions. [2024-06-03 19:42:22,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 583 transitions, 9692 flow [2024-06-03 19:42:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:42:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:42:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:42:22,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:42:22,753 INFO L175 Difference]: Start difference. First operand has 310 places, 554 transitions, 8067 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:42:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 583 transitions, 9692 flow [2024-06-03 19:42:24,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 583 transitions, 9517 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:24,301 INFO L231 Difference]: Finished difference. Result has 311 places, 563 transitions, 8151 flow [2024-06-03 19:42:24,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7896, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8151, PETRI_PLACES=311, PETRI_TRANSITIONS=563} [2024-06-03 19:42:24,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-03 19:42:24,302 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 563 transitions, 8151 flow [2024-06-03 19:42:24,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:24,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:24,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:24,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:42:24,302 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:24,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:24,303 INFO L85 PathProgramCache]: Analyzing trace with hash -103129308, now seen corresponding path program 4 times [2024-06-03 19:42:24,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:24,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135813703] [2024-06-03 19:42:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:25,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:25,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135813703] [2024-06-03 19:42:25,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135813703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:25,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:25,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:42:25,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237251419] [2024-06-03 19:42:25,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:42:25,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:42:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:42:25,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:25,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 563 transitions, 8151 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:25,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:25,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:25,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:27,410 INFO L124 PetriNetUnfolderBase]: 6220/9800 cut-off events. [2024-06-03 19:42:27,411 INFO L125 PetriNetUnfolderBase]: For 692211/692218 co-relation queries the response was YES. [2024-06-03 19:42:27,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78293 conditions, 9800 events. 6220/9800 cut-off events. For 692211/692218 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63049 event pairs, 2461 based on Foata normal form. 7/9804 useless extension candidates. Maximal degree in co-relation 78156. Up to 9410 conditions per place. [2024-06-03 19:42:27,514 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 502 selfloop transitions, 71 changer transitions 0/586 dead transitions. [2024-06-03 19:42:27,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 586 transitions, 9736 flow [2024-06-03 19:42:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:42:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:42:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-03 19:42:27,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-03 19:42:27,516 INFO L175 Difference]: Start difference. First operand has 311 places, 563 transitions, 8151 flow. Second operand 7 states and 128 transitions. [2024-06-03 19:42:27,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 586 transitions, 9736 flow [2024-06-03 19:42:28,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 586 transitions, 9590 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:28,584 INFO L231 Difference]: Finished difference. Result has 314 places, 570 transitions, 8269 flow [2024-06-03 19:42:28,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8028, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8269, PETRI_PLACES=314, PETRI_TRANSITIONS=570} [2024-06-03 19:42:28,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-03 19:42:28,585 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 570 transitions, 8269 flow [2024-06-03 19:42:28,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:28,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:28,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:28,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:42:28,585 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:28,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 820153999, now seen corresponding path program 6 times [2024-06-03 19:42:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:28,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819038126] [2024-06-03 19:42:28,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:28,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819038126] [2024-06-03 19:42:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819038126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:30,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:30,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:42:30,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820459623] [2024-06-03 19:42:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:30,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:42:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:30,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:42:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:42:30,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:30,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 570 transitions, 8269 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:30,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:30,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:30,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:32,674 INFO L124 PetriNetUnfolderBase]: 6259/9871 cut-off events. [2024-06-03 19:42:32,674 INFO L125 PetriNetUnfolderBase]: For 713026/713038 co-relation queries the response was YES. [2024-06-03 19:42:32,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78873 conditions, 9871 events. 6259/9871 cut-off events. For 713026/713038 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 63432 event pairs, 2064 based on Foata normal form. 20/9888 useless extension candidates. Maximal degree in co-relation 78736. Up to 8780 conditions per place. [2024-06-03 19:42:32,806 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 418 selfloop transitions, 193 changer transitions 0/624 dead transitions. [2024-06-03 19:42:32,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 624 transitions, 9932 flow [2024-06-03 19:42:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:42:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:42:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:42:32,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 19:42:32,808 INFO L175 Difference]: Start difference. First operand has 314 places, 570 transitions, 8269 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:42:32,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 624 transitions, 9932 flow [2024-06-03 19:42:34,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 624 transitions, 9833 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:34,377 INFO L231 Difference]: Finished difference. Result has 320 places, 571 transitions, 8630 flow [2024-06-03 19:42:34,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8630, PETRI_PLACES=320, PETRI_TRANSITIONS=571} [2024-06-03 19:42:34,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-03 19:42:34,378 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 571 transitions, 8630 flow [2024-06-03 19:42:34,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:34,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:34,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:34,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:42:34,378 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:34,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 329197737, now seen corresponding path program 7 times [2024-06-03 19:42:34,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:34,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312247475] [2024-06-03 19:42:34,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:34,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:36,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312247475] [2024-06-03 19:42:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312247475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:36,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:42:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518725981] [2024-06-03 19:42:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:36,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:42:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:42:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:42:36,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:36,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 571 transitions, 8630 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:36,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:36,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:36,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:38,292 INFO L124 PetriNetUnfolderBase]: 6300/9946 cut-off events. [2024-06-03 19:42:38,293 INFO L125 PetriNetUnfolderBase]: For 723332/723344 co-relation queries the response was YES. [2024-06-03 19:42:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80134 conditions, 9946 events. 6300/9946 cut-off events. For 723332/723344 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64045 event pairs, 2110 based on Foata normal form. 20/9963 useless extension candidates. Maximal degree in co-relation 79997. Up to 8851 conditions per place. [2024-06-03 19:42:38,421 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 190 changer transitions 0/624 dead transitions. [2024-06-03 19:42:38,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 624 transitions, 10268 flow [2024-06-03 19:42:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:42:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:42:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:42:38,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:42:38,422 INFO L175 Difference]: Start difference. First operand has 320 places, 571 transitions, 8630 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:42:38,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 624 transitions, 10268 flow [2024-06-03 19:42:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 624 transitions, 9824 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:40,410 INFO L231 Difference]: Finished difference. Result has 322 places, 572 transitions, 8642 flow [2024-06-03 19:42:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8188, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8642, PETRI_PLACES=322, PETRI_TRANSITIONS=572} [2024-06-03 19:42:40,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-03 19:42:40,411 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 572 transitions, 8642 flow [2024-06-03 19:42:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:42:40,411 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:40,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1391442615, now seen corresponding path program 8 times [2024-06-03 19:42:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:40,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181410994] [2024-06-03 19:42:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:42,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:42,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181410994] [2024-06-03 19:42:42,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181410994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:42,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:42,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:42:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004341619] [2024-06-03 19:42:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:42,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:42:42,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:42,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:42:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:42:42,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:42,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 572 transitions, 8642 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:42,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:42,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:42,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:44,630 INFO L124 PetriNetUnfolderBase]: 6341/10023 cut-off events. [2024-06-03 19:42:44,630 INFO L125 PetriNetUnfolderBase]: For 724446/724458 co-relation queries the response was YES. [2024-06-03 19:42:44,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80449 conditions, 10023 events. 6341/10023 cut-off events. For 724446/724458 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 64878 event pairs, 1998 based on Foata normal form. 20/10040 useless extension candidates. Maximal degree in co-relation 80311. Up to 8684 conditions per place. [2024-06-03 19:42:44,771 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 400 selfloop transitions, 215 changer transitions 0/628 dead transitions. [2024-06-03 19:42:44,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 628 transitions, 10302 flow [2024-06-03 19:42:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:42:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:42:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-03 19:42:44,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42917547568710357 [2024-06-03 19:42:44,772 INFO L175 Difference]: Start difference. First operand has 322 places, 572 transitions, 8642 flow. Second operand 11 states and 203 transitions. [2024-06-03 19:42:44,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 628 transitions, 10302 flow [2024-06-03 19:42:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 628 transitions, 9864 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:46,808 INFO L231 Difference]: Finished difference. Result has 325 places, 573 transitions, 8710 flow [2024-06-03 19:42:46,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8206, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8710, PETRI_PLACES=325, PETRI_TRANSITIONS=573} [2024-06-03 19:42:46,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-03 19:42:46,809 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 573 transitions, 8710 flow [2024-06-03 19:42:46,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:46,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:46,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:42:46,810 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:46,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1923764516, now seen corresponding path program 2 times [2024-06-03 19:42:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705722590] [2024-06-03 19:42:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:47,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705722590] [2024-06-03 19:42:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705722590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:47,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:47,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:47,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439088617] [2024-06-03 19:42:47,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:47,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:47,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:47,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:47,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 573 transitions, 8710 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:47,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:47,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:47,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:49,958 INFO L124 PetriNetUnfolderBase]: 6234/9872 cut-off events. [2024-06-03 19:42:49,958 INFO L125 PetriNetUnfolderBase]: For 722530/722640 co-relation queries the response was YES. [2024-06-03 19:42:50,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79829 conditions, 9872 events. 6234/9872 cut-off events. For 722530/722640 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 64262 event pairs, 2302 based on Foata normal form. 19/9849 useless extension candidates. Maximal degree in co-relation 79690. Up to 9376 conditions per place. [2024-06-03 19:42:50,081 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 469 selfloop transitions, 97 changer transitions 0/602 dead transitions. [2024-06-03 19:42:50,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 602 transitions, 10253 flow [2024-06-03 19:42:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:42:50,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:42:50,083 INFO L175 Difference]: Start difference. First operand has 325 places, 573 transitions, 8710 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:42:50,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 602 transitions, 10253 flow [2024-06-03 19:42:51,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 602 transitions, 9765 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:51,690 INFO L231 Difference]: Finished difference. Result has 325 places, 581 transitions, 8627 flow [2024-06-03 19:42:51,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8627, PETRI_PLACES=325, PETRI_TRANSITIONS=581} [2024-06-03 19:42:51,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-03 19:42:51,691 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 581 transitions, 8627 flow [2024-06-03 19:42:51,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:51,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:51,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:42:51,692 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:51,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -881144086, now seen corresponding path program 7 times [2024-06-03 19:42:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353516044] [2024-06-03 19:42:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:52,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353516044] [2024-06-03 19:42:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353516044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:52,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:52,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126806084] [2024-06-03 19:42:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:52,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:53,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:53,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 581 transitions, 8627 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:53,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:53,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:53,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:55,215 INFO L124 PetriNetUnfolderBase]: 6408/10108 cut-off events. [2024-06-03 19:42:55,216 INFO L125 PetriNetUnfolderBase]: For 708433/708442 co-relation queries the response was YES. [2024-06-03 19:42:55,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80809 conditions, 10108 events. 6408/10108 cut-off events. For 708433/708442 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 65367 event pairs, 2276 based on Foata normal form. 9/10115 useless extension candidates. Maximal degree in co-relation 80669. Up to 9722 conditions per place. [2024-06-03 19:42:55,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 510 selfloop transitions, 77 changer transitions 0/600 dead transitions. [2024-06-03 19:42:55,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 600 transitions, 9924 flow [2024-06-03 19:42:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:42:55,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:42:55,327 INFO L175 Difference]: Start difference. First operand has 325 places, 581 transitions, 8627 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:42:55,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 600 transitions, 9924 flow [2024-06-03 19:42:56,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 600 transitions, 9739 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:56,786 INFO L231 Difference]: Finished difference. Result has 329 places, 584 transitions, 8666 flow [2024-06-03 19:42:56,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8666, PETRI_PLACES=329, PETRI_TRANSITIONS=584} [2024-06-03 19:42:56,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-03 19:42:56,787 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 584 transitions, 8666 flow [2024-06-03 19:42:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:56,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:56,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:56,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:42:56,788 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:56,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1399082076, now seen corresponding path program 5 times [2024-06-03 19:42:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:56,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78926288] [2024-06-03 19:42:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:56,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78926288] [2024-06-03 19:42:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78926288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:57,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:42:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491409489] [2024-06-03 19:42:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:42:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:42:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:42:57,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:57,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 584 transitions, 8666 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:42:57,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:57,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:57,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:59,803 INFO L124 PetriNetUnfolderBase]: 6400/10106 cut-off events. [2024-06-03 19:42:59,803 INFO L125 PetriNetUnfolderBase]: For 722175/722175 co-relation queries the response was YES. [2024-06-03 19:42:59,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80617 conditions, 10106 events. 6400/10106 cut-off events. For 722175/722175 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 65492 event pairs, 2910 based on Foata normal form. 2/10106 useless extension candidates. Maximal degree in co-relation 80475. Up to 9784 conditions per place. [2024-06-03 19:42:59,953 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 555 selfloop transitions, 32 changer transitions 0/600 dead transitions. [2024-06-03 19:42:59,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 600 transitions, 10056 flow [2024-06-03 19:42:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:42:59,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 19:42:59,954 INFO L175 Difference]: Start difference. First operand has 329 places, 584 transitions, 8666 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:42:59,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 600 transitions, 10056 flow [2024-06-03 19:43:01,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 600 transitions, 9891 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:01,633 INFO L231 Difference]: Finished difference. Result has 332 places, 584 transitions, 8577 flow [2024-06-03 19:43:01,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8577, PETRI_PLACES=332, PETRI_TRANSITIONS=584} [2024-06-03 19:43:01,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-03 19:43:01,635 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 8577 flow [2024-06-03 19:43:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:01,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:01,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:43:01,635 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:01,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1393896060, now seen corresponding path program 6 times [2024-06-03 19:43:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:01,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232065828] [2024-06-03 19:43:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:02,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:02,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232065828] [2024-06-03 19:43:02,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232065828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:02,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:02,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:02,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292552514] [2024-06-03 19:43:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:02,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:02,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 584 transitions, 8577 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:02,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:02,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:02,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:04,645 INFO L124 PetriNetUnfolderBase]: 6405/10111 cut-off events. [2024-06-03 19:43:04,646 INFO L125 PetriNetUnfolderBase]: For 719174/719184 co-relation queries the response was YES. [2024-06-03 19:43:04,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80533 conditions, 10111 events. 6405/10111 cut-off events. For 719174/719184 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 65606 event pairs, 2938 based on Foata normal form. 1/10105 useless extension candidates. Maximal degree in co-relation 80391. Up to 9811 conditions per place. [2024-06-03 19:43:04,771 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 565 selfloop transitions, 21 changer transitions 0/599 dead transitions. [2024-06-03 19:43:04,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 599 transitions, 9854 flow [2024-06-03 19:43:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:43:04,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-03 19:43:04,773 INFO L175 Difference]: Start difference. First operand has 332 places, 584 transitions, 8577 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:43:04,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 599 transitions, 9854 flow [2024-06-03 19:43:06,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 599 transitions, 9726 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:06,566 INFO L231 Difference]: Finished difference. Result has 333 places, 587 transitions, 8554 flow [2024-06-03 19:43:06,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8461, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8554, PETRI_PLACES=333, PETRI_TRANSITIONS=587} [2024-06-03 19:43:06,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-03 19:43:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 587 transitions, 8554 flow [2024-06-03 19:43:06,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:06,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:06,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:43:06,567 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:06,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash 515656932, now seen corresponding path program 7 times [2024-06-03 19:43:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382656860] [2024-06-03 19:43:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:07,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382656860] [2024-06-03 19:43:07,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382656860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:07,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:07,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:07,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562529025] [2024-06-03 19:43:07,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:07,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:07,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:07,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:07,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 587 transitions, 8554 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:07,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:07,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:07,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:09,529 INFO L124 PetriNetUnfolderBase]: 6402/10108 cut-off events. [2024-06-03 19:43:09,529 INFO L125 PetriNetUnfolderBase]: For 733433/733446 co-relation queries the response was YES. [2024-06-03 19:43:09,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80582 conditions, 10108 events. 6402/10108 cut-off events. For 733433/733446 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 65601 event pairs, 2941 based on Foata normal form. 3/10103 useless extension candidates. Maximal degree in co-relation 80440. Up to 9797 conditions per place. [2024-06-03 19:43:09,672 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 556 selfloop transitions, 28 changer transitions 0/597 dead transitions. [2024-06-03 19:43:09,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 597 transitions, 9896 flow [2024-06-03 19:43:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 19:43:09,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:43:09,674 INFO L175 Difference]: Start difference. First operand has 333 places, 587 transitions, 8554 flow. Second operand 7 states and 119 transitions. [2024-06-03 19:43:09,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 597 transitions, 9896 flow [2024-06-03 19:43:11,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 597 transitions, 9828 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:11,521 INFO L231 Difference]: Finished difference. Result has 334 places, 587 transitions, 8548 flow [2024-06-03 19:43:11,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8486, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8548, PETRI_PLACES=334, PETRI_TRANSITIONS=587} [2024-06-03 19:43:11,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-03 19:43:11,521 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 587 transitions, 8548 flow [2024-06-03 19:43:11,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:11,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:11,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:11,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:43:11,522 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:11,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:11,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1883476258, now seen corresponding path program 8 times [2024-06-03 19:43:11,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:11,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535367479] [2024-06-03 19:43:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:11,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:12,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:12,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535367479] [2024-06-03 19:43:12,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535367479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:12,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:12,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:43:12,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137199772] [2024-06-03 19:43:12,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:12,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:43:12,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:43:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:43:12,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:12,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 587 transitions, 8548 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:12,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:12,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:12,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:14,372 INFO L124 PetriNetUnfolderBase]: 6399/10104 cut-off events. [2024-06-03 19:43:14,373 INFO L125 PetriNetUnfolderBase]: For 748151/748164 co-relation queries the response was YES. [2024-06-03 19:43:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80726 conditions, 10104 events. 6399/10104 cut-off events. For 748151/748164 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65561 event pairs, 2921 based on Foata normal form. 3/10099 useless extension candidates. Maximal degree in co-relation 80583. Up to 9803 conditions per place. [2024-06-03 19:43:14,504 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 563 selfloop transitions, 20 changer transitions 0/596 dead transitions. [2024-06-03 19:43:14,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 596 transitions, 9748 flow [2024-06-03 19:43:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:43:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:43:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:43:14,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-03 19:43:14,505 INFO L175 Difference]: Start difference. First operand has 334 places, 587 transitions, 8548 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:43:14,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 596 transitions, 9748 flow [2024-06-03 19:43:16,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 596 transitions, 9606 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:16,498 INFO L231 Difference]: Finished difference. Result has 334 places, 587 transitions, 8452 flow [2024-06-03 19:43:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8452, PETRI_PLACES=334, PETRI_TRANSITIONS=587} [2024-06-03 19:43:16,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-03 19:43:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 587 transitions, 8452 flow [2024-06-03 19:43:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:16,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:16,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:43:16,499 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 127325755, now seen corresponding path program 9 times [2024-06-03 19:43:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533323752] [2024-06-03 19:43:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:17,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533323752] [2024-06-03 19:43:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533323752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:17,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482325093] [2024-06-03 19:43:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:17,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:17,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:17,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 587 transitions, 8452 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:17,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:17,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:17,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:20,258 INFO L124 PetriNetUnfolderBase]: 6440/10165 cut-off events. [2024-06-03 19:43:20,258 INFO L125 PetriNetUnfolderBase]: For 787754/787764 co-relation queries the response was YES. [2024-06-03 19:43:20,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81471 conditions, 10165 events. 6440/10165 cut-off events. For 787754/787764 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 65718 event pairs, 2888 based on Foata normal form. 12/10170 useless extension candidates. Maximal degree in co-relation 81328. Up to 9735 conditions per place. [2024-06-03 19:43:20,385 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 590 selfloop transitions, 21 changer transitions 0/624 dead transitions. [2024-06-03 19:43:20,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 624 transitions, 9920 flow [2024-06-03 19:43:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:43:20,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:43:20,386 INFO L175 Difference]: Start difference. First operand has 334 places, 587 transitions, 8452 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:43:20,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 624 transitions, 9920 flow [2024-06-03 19:43:22,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 624 transitions, 9878 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:22,166 INFO L231 Difference]: Finished difference. Result has 339 places, 588 transitions, 8524 flow [2024-06-03 19:43:22,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8410, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8524, PETRI_PLACES=339, PETRI_TRANSITIONS=588} [2024-06-03 19:43:22,166 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-03 19:43:22,167 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 588 transitions, 8524 flow [2024-06-03 19:43:22,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:22,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:22,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:43:22,167 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:22,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1985540229, now seen corresponding path program 10 times [2024-06-03 19:43:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:22,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262784907] [2024-06-03 19:43:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:23,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:23,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262784907] [2024-06-03 19:43:23,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262784907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:23,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:23,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993317451] [2024-06-03 19:43:23,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:23,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:23,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:23,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:23,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 588 transitions, 8524 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:23,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:23,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:23,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:26,198 INFO L124 PetriNetUnfolderBase]: 6481/10244 cut-off events. [2024-06-03 19:43:26,198 INFO L125 PetriNetUnfolderBase]: For 812887/812897 co-relation queries the response was YES. [2024-06-03 19:43:26,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82438 conditions, 10244 events. 6481/10244 cut-off events. For 812887/812897 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 66785 event pairs, 2934 based on Foata normal form. 12/10249 useless extension candidates. Maximal degree in co-relation 82294. Up to 9745 conditions per place. [2024-06-03 19:43:26,331 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 48 changer transitions 0/630 dead transitions. [2024-06-03 19:43:26,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 630 transitions, 10070 flow [2024-06-03 19:43:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 19:43:26,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-03 19:43:26,332 INFO L175 Difference]: Start difference. First operand has 339 places, 588 transitions, 8524 flow. Second operand 10 states and 177 transitions. [2024-06-03 19:43:26,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 630 transitions, 10070 flow [2024-06-03 19:43:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 630 transitions, 9974 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:28,573 INFO L231 Difference]: Finished difference. Result has 341 places, 589 transitions, 8598 flow [2024-06-03 19:43:28,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8428, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8598, PETRI_PLACES=341, PETRI_TRANSITIONS=589} [2024-06-03 19:43:28,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-03 19:43:28,574 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 589 transitions, 8598 flow [2024-06-03 19:43:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:28,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:28,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:28,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:43:28,574 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:28,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:28,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1215734129, now seen corresponding path program 11 times [2024-06-03 19:43:28,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:28,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684961586] [2024-06-03 19:43:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:28,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684961586] [2024-06-03 19:43:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684961586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:43:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606207075] [2024-06-03 19:43:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:30,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:43:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:43:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:43:30,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:30,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 589 transitions, 8598 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:30,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:30,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:30,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:32,769 INFO L124 PetriNetUnfolderBase]: 6522/10315 cut-off events. [2024-06-03 19:43:32,770 INFO L125 PetriNetUnfolderBase]: For 833710/833720 co-relation queries the response was YES. [2024-06-03 19:43:32,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83125 conditions, 10315 events. 6522/10315 cut-off events. For 833710/833720 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 67296 event pairs, 2946 based on Foata normal form. 12/10320 useless extension candidates. Maximal degree in co-relation 82980. Up to 9698 conditions per place. [2024-06-03 19:43:32,898 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 84 changer transitions 0/638 dead transitions. [2024-06-03 19:43:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 638 transitions, 10255 flow [2024-06-03 19:43:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:43:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-03 19:43:32,899 INFO L175 Difference]: Start difference. First operand has 341 places, 589 transitions, 8598 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:43:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 638 transitions, 10255 flow [2024-06-03 19:43:35,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 638 transitions, 10103 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:35,080 INFO L231 Difference]: Finished difference. Result has 343 places, 590 transitions, 8690 flow [2024-06-03 19:43:35,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8690, PETRI_PLACES=343, PETRI_TRANSITIONS=590} [2024-06-03 19:43:35,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-03 19:43:35,081 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 590 transitions, 8690 flow [2024-06-03 19:43:35,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:35,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:35,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:35,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:43:35,082 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:35,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1640450699, now seen corresponding path program 12 times [2024-06-03 19:43:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068772931] [2024-06-03 19:43:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:35,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:36,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:36,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068772931] [2024-06-03 19:43:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068772931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:36,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:36,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:43:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869137421] [2024-06-03 19:43:36,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:36,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:43:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:43:36,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:43:36,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:36,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 590 transitions, 8690 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:36,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:36,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:36,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:39,276 INFO L124 PetriNetUnfolderBase]: 6563/10386 cut-off events. [2024-06-03 19:43:39,277 INFO L125 PetriNetUnfolderBase]: For 855187/855197 co-relation queries the response was YES. [2024-06-03 19:43:39,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83840 conditions, 10386 events. 6563/10386 cut-off events. For 855187/855197 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 67912 event pairs, 2961 based on Foata normal form. 12/10391 useless extension candidates. Maximal degree in co-relation 83694. Up to 9698 conditions per place. [2024-06-03 19:43:39,415 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 88 changer transitions 0/637 dead transitions. [2024-06-03 19:43:39,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 637 transitions, 10320 flow [2024-06-03 19:43:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:43:39,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-03 19:43:39,417 INFO L175 Difference]: Start difference. First operand has 343 places, 590 transitions, 8690 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:43:39,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 637 transitions, 10320 flow [2024-06-03 19:43:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 637 transitions, 10094 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:41,622 INFO L231 Difference]: Finished difference. Result has 345 places, 591 transitions, 8718 flow [2024-06-03 19:43:41,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8464, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8718, PETRI_PLACES=345, PETRI_TRANSITIONS=591} [2024-06-03 19:43:41,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-03 19:43:41,622 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 591 transitions, 8718 flow [2024-06-03 19:43:41,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:41,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:41,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:41,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:43:41,623 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:41,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1813171229, now seen corresponding path program 13 times [2024-06-03 19:43:41,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822815559] [2024-06-03 19:43:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:41,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:43,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:43,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822815559] [2024-06-03 19:43:43,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822815559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:43,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:43,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:43:43,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178915635] [2024-06-03 19:43:43,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:43,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:43:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:43:43,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:43:43,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:43,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 591 transitions, 8718 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:43,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:43,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:43,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:45,828 INFO L124 PetriNetUnfolderBase]: 6604/10456 cut-off events. [2024-06-03 19:43:45,828 INFO L125 PetriNetUnfolderBase]: For 875703/875713 co-relation queries the response was YES. [2024-06-03 19:43:45,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84457 conditions, 10456 events. 6604/10456 cut-off events. For 875703/875713 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 68555 event pairs, 2968 based on Foata normal form. 12/10461 useless extension candidates. Maximal degree in co-relation 84310. Up to 9840 conditions per place. [2024-06-03 19:43:45,961 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 537 selfloop transitions, 87 changer transitions 0/637 dead transitions. [2024-06-03 19:43:45,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 637 transitions, 10331 flow [2024-06-03 19:43:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:43:45,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:43:45,962 INFO L175 Difference]: Start difference. First operand has 345 places, 591 transitions, 8718 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:43:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 637 transitions, 10331 flow [2024-06-03 19:43:48,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 637 transitions, 10095 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:48,312 INFO L231 Difference]: Finished difference. Result has 347 places, 592 transitions, 8736 flow [2024-06-03 19:43:48,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8736, PETRI_PLACES=347, PETRI_TRANSITIONS=592} [2024-06-03 19:43:48,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-03 19:43:48,313 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 592 transitions, 8736 flow [2024-06-03 19:43:48,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:48,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:48,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:48,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:43:48,314 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:48,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1985770869, now seen corresponding path program 14 times [2024-06-03 19:43:48,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:48,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703168241] [2024-06-03 19:43:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:48,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703168241] [2024-06-03 19:43:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703168241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:43:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338702013] [2024-06-03 19:43:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:43:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:43:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:43:49,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:49,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 592 transitions, 8736 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:49,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:49,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:49,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:52,293 INFO L124 PetriNetUnfolderBase]: 6584/10426 cut-off events. [2024-06-03 19:43:52,293 INFO L125 PetriNetUnfolderBase]: For 866089/866099 co-relation queries the response was YES. [2024-06-03 19:43:52,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83354 conditions, 10426 events. 6584/10426 cut-off events. For 866089/866099 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 68362 event pairs, 2963 based on Foata normal form. 12/10431 useless extension candidates. Maximal degree in co-relation 83206. Up to 9871 conditions per place. [2024-06-03 19:43:52,427 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 49 changer transitions 0/631 dead transitions. [2024-06-03 19:43:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 631 transitions, 10115 flow [2024-06-03 19:43:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 19:43:52,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-03 19:43:52,428 INFO L175 Difference]: Start difference. First operand has 347 places, 592 transitions, 8736 flow. Second operand 10 states and 177 transitions. [2024-06-03 19:43:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 631 transitions, 10115 flow [2024-06-03 19:43:55,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 631 transitions, 9879 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:55,188 INFO L231 Difference]: Finished difference. Result has 348 places, 591 transitions, 8508 flow [2024-06-03 19:43:55,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8406, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8508, PETRI_PLACES=348, PETRI_TRANSITIONS=591} [2024-06-03 19:43:55,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-03 19:43:55,188 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 591 transitions, 8508 flow [2024-06-03 19:43:55,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:55,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:55,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:55,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:43:55,189 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:55,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash -565270702, now seen corresponding path program 3 times [2024-06-03 19:43:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:55,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711198842] [2024-06-03 19:43:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711198842] [2024-06-03 19:43:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711198842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:56,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:56,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115678794] [2024-06-03 19:43:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:56,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:56,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:56,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:56,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:56,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 591 transitions, 8508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:43:56,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:56,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:56,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:58,509 INFO L124 PetriNetUnfolderBase]: 6458/10255 cut-off events. [2024-06-03 19:43:58,509 INFO L125 PetriNetUnfolderBase]: For 895673/895811 co-relation queries the response was YES. [2024-06-03 19:43:58,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82596 conditions, 10255 events. 6458/10255 cut-off events. For 895673/895811 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 67772 event pairs, 2978 based on Foata normal form. 15/10221 useless extension candidates. Maximal degree in co-relation 82447. Up to 9891 conditions per place. [2024-06-03 19:43:58,641 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 552 selfloop transitions, 27 changer transitions 0/616 dead transitions. [2024-06-03 19:43:58,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 616 transitions, 10132 flow [2024-06-03 19:43:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:43:58,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-03 19:43:58,642 INFO L175 Difference]: Start difference. First operand has 348 places, 591 transitions, 8508 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:43:58,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 616 transitions, 10132 flow [2024-06-03 19:44:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 616 transitions, 9872 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-03 19:44:01,095 INFO L231 Difference]: Finished difference. Result has 347 places, 601 transitions, 8580 flow [2024-06-03 19:44:01,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8248, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8580, PETRI_PLACES=347, PETRI_TRANSITIONS=601} [2024-06-03 19:44:01,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-03 19:44:01,096 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 601 transitions, 8580 flow [2024-06-03 19:44:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:01,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:01,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:01,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:44:01,097 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:01,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1986972350, now seen corresponding path program 4 times [2024-06-03 19:44:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:01,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636959145] [2024-06-03 19:44:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:01,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:01,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636959145] [2024-06-03 19:44:01,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636959145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:01,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:01,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:01,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211327285] [2024-06-03 19:44:01,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:01,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:01,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:01,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:01,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:02,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:02,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 601 transitions, 8580 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:02,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:02,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:02,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:04,173 INFO L124 PetriNetUnfolderBase]: 6441/10232 cut-off events. [2024-06-03 19:44:04,173 INFO L125 PetriNetUnfolderBase]: For 888847/888967 co-relation queries the response was YES. [2024-06-03 19:44:04,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80751 conditions, 10232 events. 6441/10232 cut-off events. For 888847/888967 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 67570 event pairs, 2972 based on Foata normal form. 16/10201 useless extension candidates. Maximal degree in co-relation 80602. Up to 9892 conditions per place. [2024-06-03 19:44:04,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 556 selfloop transitions, 20 changer transitions 0/613 dead transitions. [2024-06-03 19:44:04,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 613 transitions, 9775 flow [2024-06-03 19:44:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:44:04,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:44:04,324 INFO L175 Difference]: Start difference. First operand has 347 places, 601 transitions, 8580 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:44:04,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 613 transitions, 9775 flow [2024-06-03 19:44:06,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 613 transitions, 9561 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-03 19:44:06,525 INFO L231 Difference]: Finished difference. Result has 351 places, 601 transitions, 8414 flow [2024-06-03 19:44:06,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8366, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8414, PETRI_PLACES=351, PETRI_TRANSITIONS=601} [2024-06-03 19:44:06,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-03 19:44:06,526 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 601 transitions, 8414 flow [2024-06-03 19:44:06,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:06,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:06,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:06,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:44:06,526 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:06,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2000304830, now seen corresponding path program 5 times [2024-06-03 19:44:06,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:06,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358741901] [2024-06-03 19:44:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358741901] [2024-06-03 19:44:07,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358741901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:07,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:07,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:07,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998880038] [2024-06-03 19:44:07,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:07,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:07,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:07,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:07,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 601 transitions, 8414 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:07,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:07,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:09,835 INFO L124 PetriNetUnfolderBase]: 6429/10214 cut-off events. [2024-06-03 19:44:09,835 INFO L125 PetriNetUnfolderBase]: For 886880/886988 co-relation queries the response was YES. [2024-06-03 19:44:09,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80143 conditions, 10214 events. 6429/10214 cut-off events. For 886880/886988 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 67462 event pairs, 2967 based on Foata normal form. 15/10185 useless extension candidates. Maximal degree in co-relation 79993. Up to 9848 conditions per place. [2024-06-03 19:44:09,981 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 539 selfloop transitions, 39 changer transitions 0/615 dead transitions. [2024-06-03 19:44:09,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 615 transitions, 9620 flow [2024-06-03 19:44:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:44:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-03 19:44:09,984 INFO L175 Difference]: Start difference. First operand has 351 places, 601 transitions, 8414 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:44:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 615 transitions, 9620 flow [2024-06-03 19:44:12,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 615 transitions, 9502 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:12,582 INFO L231 Difference]: Finished difference. Result has 353 places, 601 transitions, 8382 flow [2024-06-03 19:44:12,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8296, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8382, PETRI_PLACES=353, PETRI_TRANSITIONS=601} [2024-06-03 19:44:12,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-03 19:44:12,583 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 601 transitions, 8382 flow [2024-06-03 19:44:12,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:12,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:12,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:44:12,584 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2000316734, now seen corresponding path program 8 times [2024-06-03 19:44:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885320811] [2024-06-03 19:44:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885320811] [2024-06-03 19:44:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885320811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151832604] [2024-06-03 19:44:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:13,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:13,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 601 transitions, 8382 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:13,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:13,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:16,041 INFO L124 PetriNetUnfolderBase]: 6621/10478 cut-off events. [2024-06-03 19:44:16,041 INFO L125 PetriNetUnfolderBase]: For 882434/882438 co-relation queries the response was YES. [2024-06-03 19:44:16,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81974 conditions, 10478 events. 6621/10478 cut-off events. For 882434/882438 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 68705 event pairs, 2989 based on Foata normal form. 1/10469 useless extension candidates. Maximal degree in co-relation 81823. Up to 10187 conditions per place. [2024-06-03 19:44:16,179 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 580 selfloop transitions, 18 changer transitions 0/611 dead transitions. [2024-06-03 19:44:16,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 611 transitions, 9614 flow [2024-06-03 19:44:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:44:16,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-03 19:44:16,180 INFO L175 Difference]: Start difference. First operand has 353 places, 601 transitions, 8382 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:44:16,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 611 transitions, 9614 flow [2024-06-03 19:44:18,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 611 transitions, 9404 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-03 19:44:18,323 INFO L231 Difference]: Finished difference. Result has 352 places, 601 transitions, 8214 flow [2024-06-03 19:44:18,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8214, PETRI_PLACES=352, PETRI_TRANSITIONS=601} [2024-06-03 19:44:18,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:44:18,324 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 601 transitions, 8214 flow [2024-06-03 19:44:18,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:18,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:18,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:18,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:44:18,325 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:18,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1100547647, now seen corresponding path program 1 times [2024-06-03 19:44:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:18,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52113222] [2024-06-03 19:44:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52113222] [2024-06-03 19:44:19,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52113222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:19,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266373433] [2024-06-03 19:44:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:19,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:19,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 601 transitions, 8214 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:19,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:21,732 INFO L124 PetriNetUnfolderBase]: 6751/10616 cut-off events. [2024-06-03 19:44:21,732 INFO L125 PetriNetUnfolderBase]: For 901042/901042 co-relation queries the response was YES. [2024-06-03 19:44:21,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82729 conditions, 10616 events. 6751/10616 cut-off events. For 901042/901042 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 68962 event pairs, 3054 based on Foata normal form. 2/10616 useless extension candidates. Maximal degree in co-relation 82578. Up to 10414 conditions per place. [2024-06-03 19:44:21,870 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 599 selfloop transitions, 20 changer transitions 0/622 dead transitions. [2024-06-03 19:44:21,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 622 transitions, 9590 flow [2024-06-03 19:44:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:44:21,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:44:21,872 INFO L175 Difference]: Start difference. First operand has 352 places, 601 transitions, 8214 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:44:21,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 622 transitions, 9590 flow [2024-06-03 19:44:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 622 transitions, 9441 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:23,860 INFO L231 Difference]: Finished difference. Result has 352 places, 604 transitions, 8167 flow [2024-06-03 19:44:23,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8065, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8167, PETRI_PLACES=352, PETRI_TRANSITIONS=604} [2024-06-03 19:44:23,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:44:23,861 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 604 transitions, 8167 flow [2024-06-03 19:44:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:23,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:23,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:23,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:44:23,861 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:23,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1104272297, now seen corresponding path program 2 times [2024-06-03 19:44:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:23,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783658008] [2024-06-03 19:44:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783658008] [2024-06-03 19:44:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783658008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:24,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:24,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:24,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088212021] [2024-06-03 19:44:24,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:24,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:24,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 604 transitions, 8167 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:24,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:24,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:24,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:27,439 INFO L124 PetriNetUnfolderBase]: 6777/10652 cut-off events. [2024-06-03 19:44:27,439 INFO L125 PetriNetUnfolderBase]: For 928196/928196 co-relation queries the response was YES. [2024-06-03 19:44:27,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83904 conditions, 10652 events. 6777/10652 cut-off events. For 928196/928196 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 69174 event pairs, 3058 based on Foata normal form. 2/10652 useless extension candidates. Maximal degree in co-relation 83752. Up to 10385 conditions per place. [2024-06-03 19:44:27,562 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 582 selfloop transitions, 47 changer transitions 0/632 dead transitions. [2024-06-03 19:44:27,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 632 transitions, 10005 flow [2024-06-03 19:44:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:44:27,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:44:27,563 INFO L175 Difference]: Start difference. First operand has 352 places, 604 transitions, 8167 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:44:27,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 632 transitions, 10005 flow [2024-06-03 19:44:29,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 632 transitions, 9925 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:29,450 INFO L231 Difference]: Finished difference. Result has 354 places, 613 transitions, 8361 flow [2024-06-03 19:44:29,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8087, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8361, PETRI_PLACES=354, PETRI_TRANSITIONS=613} [2024-06-03 19:44:29,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-03 19:44:29,451 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 613 transitions, 8361 flow [2024-06-03 19:44:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:29,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:29,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:44:29,451 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:29,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1410523804, now seen corresponding path program 1 times [2024-06-03 19:44:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973214660] [2024-06-03 19:44:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973214660] [2024-06-03 19:44:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973214660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:30,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996214704] [2024-06-03 19:44:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:30,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:30,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 613 transitions, 8361 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:30,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:30,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:30,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:32,883 INFO L124 PetriNetUnfolderBase]: 6792/10673 cut-off events. [2024-06-03 19:44:32,884 INFO L125 PetriNetUnfolderBase]: For 956159/956159 co-relation queries the response was YES. [2024-06-03 19:44:33,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84872 conditions, 10673 events. 6792/10673 cut-off events. For 956159/956159 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 69274 event pairs, 3053 based on Foata normal form. 3/10674 useless extension candidates. Maximal degree in co-relation 84719. Up to 10444 conditions per place. [2024-06-03 19:44:33,069 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 599 selfloop transitions, 36 changer transitions 0/638 dead transitions. [2024-06-03 19:44:33,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 638 transitions, 9973 flow [2024-06-03 19:44:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:44:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:44:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-03 19:44:33,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-03 19:44:33,070 INFO L175 Difference]: Start difference. First operand has 354 places, 613 transitions, 8361 flow. Second operand 9 states and 145 transitions. [2024-06-03 19:44:33,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 638 transitions, 9973 flow [2024-06-03 19:44:35,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 638 transitions, 9881 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-03 19:44:35,685 INFO L231 Difference]: Finished difference. Result has 360 places, 619 transitions, 8453 flow [2024-06-03 19:44:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8269, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8453, PETRI_PLACES=360, PETRI_TRANSITIONS=619} [2024-06-03 19:44:35,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-03 19:44:35,686 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 619 transitions, 8453 flow [2024-06-03 19:44:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:35,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:35,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:44:35,686 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:35,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2101074751, now seen corresponding path program 3 times [2024-06-03 19:44:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124305394] [2024-06-03 19:44:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:36,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:36,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124305394] [2024-06-03 19:44:36,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124305394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:36,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:36,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540351148] [2024-06-03 19:44:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:36,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:36,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 619 transitions, 8453 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:36,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:36,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:39,238 INFO L124 PetriNetUnfolderBase]: 6786/10665 cut-off events. [2024-06-03 19:44:39,238 INFO L125 PetriNetUnfolderBase]: For 969078/969078 co-relation queries the response was YES. [2024-06-03 19:44:39,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85479 conditions, 10665 events. 6786/10665 cut-off events. For 969078/969078 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 69263 event pairs, 3057 based on Foata normal form. 2/10665 useless extension candidates. Maximal degree in co-relation 85324. Up to 10401 conditions per place. [2024-06-03 19:44:39,412 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 588 selfloop transitions, 46 changer transitions 0/637 dead transitions. [2024-06-03 19:44:39,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 637 transitions, 9971 flow [2024-06-03 19:44:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:44:39,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:44:39,413 INFO L175 Difference]: Start difference. First operand has 360 places, 619 transitions, 8453 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:44:39,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 637 transitions, 9971 flow [2024-06-03 19:44:42,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 637 transitions, 9868 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:42,179 INFO L231 Difference]: Finished difference. Result has 363 places, 619 transitions, 8448 flow [2024-06-03 19:44:42,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8350, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8448, PETRI_PLACES=363, PETRI_TRANSITIONS=619} [2024-06-03 19:44:42,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-03 19:44:42,179 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 619 transitions, 8448 flow [2024-06-03 19:44:42,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:42,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:42,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:42,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:44:42,180 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:42,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash 798435243, now seen corresponding path program 4 times [2024-06-03 19:44:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:42,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029484325] [2024-06-03 19:44:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:42,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029484325] [2024-06-03 19:44:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029484325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671944769] [2024-06-03 19:44:43,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:43,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:43,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 619 transitions, 8448 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:43,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:43,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:43,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:45,685 INFO L124 PetriNetUnfolderBase]: 6796/10680 cut-off events. [2024-06-03 19:44:45,685 INFO L125 PetriNetUnfolderBase]: For 989325/989328 co-relation queries the response was YES. [2024-06-03 19:44:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85785 conditions, 10680 events. 6796/10680 cut-off events. For 989325/989328 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 69378 event pairs, 3068 based on Foata normal form. 2/10679 useless extension candidates. Maximal degree in co-relation 85628. Up to 10411 conditions per place. [2024-06-03 19:44:45,826 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 583 selfloop transitions, 50 changer transitions 0/636 dead transitions. [2024-06-03 19:44:45,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 636 transitions, 10004 flow [2024-06-03 19:44:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:44:45,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-03 19:44:45,828 INFO L175 Difference]: Start difference. First operand has 363 places, 619 transitions, 8448 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:44:45,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 636 transitions, 10004 flow [2024-06-03 19:44:49,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 636 transitions, 9888 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:49,096 INFO L231 Difference]: Finished difference. Result has 364 places, 622 transitions, 8502 flow [2024-06-03 19:44:49,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8502, PETRI_PLACES=364, PETRI_TRANSITIONS=622} [2024-06-03 19:44:49,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-03 19:44:49,097 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 622 transitions, 8502 flow [2024-06-03 19:44:49,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:49,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:49,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:49,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:44:49,097 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:49,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:49,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1186961822, now seen corresponding path program 2 times [2024-06-03 19:44:49,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:49,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802693748] [2024-06-03 19:44:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:49,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:49,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:49,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802693748] [2024-06-03 19:44:49,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802693748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:49,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:49,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:49,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037375337] [2024-06-03 19:44:49,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:49,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:49,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:50,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:50,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 622 transitions, 8502 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:50,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:50,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:50,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:52,637 INFO L124 PetriNetUnfolderBase]: 6811/10701 cut-off events. [2024-06-03 19:44:52,638 INFO L125 PetriNetUnfolderBase]: For 1013187/1013190 co-relation queries the response was YES. [2024-06-03 19:44:52,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86160 conditions, 10701 events. 6811/10701 cut-off events. For 1013187/1013190 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 69471 event pairs, 3045 based on Foata normal form. 5/10703 useless extension candidates. Maximal degree in co-relation 86002. Up to 10464 conditions per place. [2024-06-03 19:44:52,781 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 596 selfloop transitions, 41 changer transitions 0/640 dead transitions. [2024-06-03 19:44:52,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 640 transitions, 10048 flow [2024-06-03 19:44:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:44:52,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-03 19:44:52,783 INFO L175 Difference]: Start difference. First operand has 364 places, 622 transitions, 8502 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:44:52,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 640 transitions, 10048 flow [2024-06-03 19:44:55,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 640 transitions, 9880 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:55,648 INFO L231 Difference]: Finished difference. Result has 366 places, 625 transitions, 8469 flow [2024-06-03 19:44:55,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8334, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8469, PETRI_PLACES=366, PETRI_TRANSITIONS=625} [2024-06-03 19:44:55,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-03 19:44:55,648 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 625 transitions, 8469 flow [2024-06-03 19:44:55,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:55,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:55,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:55,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:44:55,649 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:55,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1554616144, now seen corresponding path program 3 times [2024-06-03 19:44:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715615092] [2024-06-03 19:44:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:56,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:56,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715615092] [2024-06-03 19:44:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715615092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764117662] [2024-06-03 19:44:56,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:56,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:44:56,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 625 transitions, 8469 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:44:56,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:56,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:44:56,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:59,063 INFO L124 PetriNetUnfolderBase]: 6826/10722 cut-off events. [2024-06-03 19:44:59,063 INFO L125 PetriNetUnfolderBase]: For 1033700/1033703 co-relation queries the response was YES. [2024-06-03 19:44:59,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86456 conditions, 10722 events. 6826/10722 cut-off events. For 1033700/1033703 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69636 event pairs, 3055 based on Foata normal form. 5/10724 useless extension candidates. Maximal degree in co-relation 86297. Up to 10478 conditions per place. [2024-06-03 19:44:59,233 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 600 selfloop transitions, 42 changer transitions 0/645 dead transitions. [2024-06-03 19:44:59,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 645 transitions, 10041 flow [2024-06-03 19:44:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:44:59,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-03 19:44:59,234 INFO L175 Difference]: Start difference. First operand has 366 places, 625 transitions, 8469 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:44:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 645 transitions, 10041 flow [2024-06-03 19:45:02,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 645 transitions, 9914 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:02,222 INFO L231 Difference]: Finished difference. Result has 369 places, 628 transitions, 8484 flow [2024-06-03 19:45:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8484, PETRI_PLACES=369, PETRI_TRANSITIONS=628} [2024-06-03 19:45:02,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-03 19:45:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 628 transitions, 8484 flow [2024-06-03 19:45:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:45:02,224 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:02,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1554414334, now seen corresponding path program 4 times [2024-06-03 19:45:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533814122] [2024-06-03 19:45:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:03,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:03,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533814122] [2024-06-03 19:45:03,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533814122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:03,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:03,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:03,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015003218] [2024-06-03 19:45:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:03,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:03,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:03,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:03,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:45:03,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 628 transitions, 8484 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:03,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:03,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:45:03,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:05,660 INFO L124 PetriNetUnfolderBase]: 6817/10710 cut-off events. [2024-06-03 19:45:05,660 INFO L125 PetriNetUnfolderBase]: For 1041838/1041841 co-relation queries the response was YES. [2024-06-03 19:45:05,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86187 conditions, 10710 events. 6817/10710 cut-off events. For 1041838/1041841 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 69553 event pairs, 3053 based on Foata normal form. 5/10712 useless extension candidates. Maximal degree in co-relation 86027. Up to 10471 conditions per place. [2024-06-03 19:45:05,830 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 600 selfloop transitions, 41 changer transitions 0/644 dead transitions. [2024-06-03 19:45:05,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 644 transitions, 9826 flow [2024-06-03 19:45:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:45:05,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-03 19:45:05,831 INFO L175 Difference]: Start difference. First operand has 369 places, 628 transitions, 8484 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:45:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 644 transitions, 9826 flow [2024-06-03 19:45:09,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 644 transitions, 9726 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:09,525 INFO L231 Difference]: Finished difference. Result has 372 places, 628 transitions, 8472 flow [2024-06-03 19:45:09,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8472, PETRI_PLACES=372, PETRI_TRANSITIONS=628} [2024-06-03 19:45:09,525 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-03 19:45:09,525 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 628 transitions, 8472 flow [2024-06-03 19:45:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:09,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:09,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:45:09,526 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:09,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1994585175, now seen corresponding path program 5 times [2024-06-03 19:45:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:09,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211928717] [2024-06-03 19:45:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:10,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:10,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211928717] [2024-06-03 19:45:10,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211928717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:10,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:10,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595542290] [2024-06-03 19:45:10,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:10,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:45:10,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 628 transitions, 8472 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:10,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:10,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:45:10,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:13,033 INFO L124 PetriNetUnfolderBase]: 6827/10724 cut-off events. [2024-06-03 19:45:13,033 INFO L125 PetriNetUnfolderBase]: For 1057837/1057840 co-relation queries the response was YES. [2024-06-03 19:45:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86434 conditions, 10724 events. 6827/10724 cut-off events. For 1057837/1057840 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69714 event pairs, 3067 based on Foata normal form. 2/10723 useless extension candidates. Maximal degree in co-relation 86273. Up to 10451 conditions per place. [2024-06-03 19:45:13,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 591 selfloop transitions, 52 changer transitions 0/646 dead transitions. [2024-06-03 19:45:13,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 646 transitions, 10044 flow [2024-06-03 19:45:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:45:13,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-03 19:45:13,189 INFO L175 Difference]: Start difference. First operand has 372 places, 628 transitions, 8472 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:45:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 646 transitions, 10044 flow [2024-06-03 19:45:16,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 646 transitions, 9905 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 19:45:16,376 INFO L231 Difference]: Finished difference. Result has 371 places, 631 transitions, 8489 flow [2024-06-03 19:45:16,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8333, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8489, PETRI_PLACES=371, PETRI_TRANSITIONS=631} [2024-06-03 19:45:16,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-03 19:45:16,377 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 631 transitions, 8489 flow [2024-06-03 19:45:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:16,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:16,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:16,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:45:16,377 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:16,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1987233525, now seen corresponding path program 6 times [2024-06-03 19:45:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:16,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510612981] [2024-06-03 19:45:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:17,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:17,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510612981] [2024-06-03 19:45:17,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510612981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:17,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:17,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:17,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770591816] [2024-06-03 19:45:17,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:17,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:17,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:17,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:17,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:45:17,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 631 transitions, 8489 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:17,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:17,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:45:17,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:19,997 INFO L124 PetriNetUnfolderBase]: 6821/10716 cut-off events. [2024-06-03 19:45:19,997 INFO L125 PetriNetUnfolderBase]: For 1070782/1070785 co-relation queries the response was YES. [2024-06-03 19:45:20,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86443 conditions, 10716 events. 6821/10716 cut-off events. For 1070782/1070785 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 69639 event pairs, 3054 based on Foata normal form. 2/10715 useless extension candidates. Maximal degree in co-relation 86281. Up to 10446 conditions per place. [2024-06-03 19:45:20,146 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 586 selfloop transitions, 55 changer transitions 0/644 dead transitions. [2024-06-03 19:45:20,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 644 transitions, 9825 flow [2024-06-03 19:45:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:45:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-03 19:45:20,147 INFO L175 Difference]: Start difference. First operand has 371 places, 631 transitions, 8489 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:45:20,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 644 transitions, 9825 flow [2024-06-03 19:45:23,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 644 transitions, 9673 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:45:23,724 INFO L231 Difference]: Finished difference. Result has 374 places, 631 transitions, 8453 flow [2024-06-03 19:45:23,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8453, PETRI_PLACES=374, PETRI_TRANSITIONS=631} [2024-06-03 19:45:23,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-03 19:45:23,724 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 631 transitions, 8453 flow [2024-06-03 19:45:23,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:23,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:23,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:23,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:45:23,725 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:23,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1670492394, now seen corresponding path program 1 times [2024-06-03 19:45:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:23,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570148995] [2024-06-03 19:45:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:23,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:24,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:24,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570148995] [2024-06-03 19:45:24,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570148995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:24,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880594850] [2024-06-03 19:45:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:24,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:24,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:24,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 631 transitions, 8453 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:24,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:24,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:24,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:27,254 INFO L124 PetriNetUnfolderBase]: 6718/10611 cut-off events. [2024-06-03 19:45:27,255 INFO L125 PetriNetUnfolderBase]: For 1106391/1106405 co-relation queries the response was YES. [2024-06-03 19:45:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86383 conditions, 10611 events. 6718/10611 cut-off events. For 1106391/1106405 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 69152 event pairs, 2208 based on Foata normal form. 10/10606 useless extension candidates. Maximal degree in co-relation 86220. Up to 9956 conditions per place. [2024-06-03 19:45:27,397 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 107 changer transitions 0/667 dead transitions. [2024-06-03 19:45:27,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 667 transitions, 10145 flow [2024-06-03 19:45:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:45:27,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:45:27,399 INFO L175 Difference]: Start difference. First operand has 374 places, 631 transitions, 8453 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:45:27,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 667 transitions, 10145 flow [2024-06-03 19:45:30,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 667 transitions, 10011 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:45:30,788 INFO L231 Difference]: Finished difference. Result has 376 places, 636 transitions, 8655 flow [2024-06-03 19:45:30,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8319, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8655, PETRI_PLACES=376, PETRI_TRANSITIONS=636} [2024-06-03 19:45:30,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-03 19:45:30,789 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 636 transitions, 8655 flow [2024-06-03 19:45:30,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:30,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:30,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:30,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:45:30,790 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:30,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1305700274, now seen corresponding path program 2 times [2024-06-03 19:45:30,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:30,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880866984] [2024-06-03 19:45:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:30,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880866984] [2024-06-03 19:45:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880866984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:31,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:31,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:31,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741950664] [2024-06-03 19:45:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:31,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:31,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:31,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 636 transitions, 8655 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:31,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:31,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:31,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:34,463 INFO L124 PetriNetUnfolderBase]: 6743/10648 cut-off events. [2024-06-03 19:45:34,464 INFO L125 PetriNetUnfolderBase]: For 1131022/1131034 co-relation queries the response was YES. [2024-06-03 19:45:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87513 conditions, 10648 events. 6743/10648 cut-off events. For 1131022/1131034 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 69867 event pairs, 2533 based on Foata normal form. 10/10647 useless extension candidates. Maximal degree in co-relation 87348. Up to 10094 conditions per place. [2024-06-03 19:45:34,614 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 549 selfloop transitions, 107 changer transitions 0/675 dead transitions. [2024-06-03 19:45:34,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 675 transitions, 10454 flow [2024-06-03 19:45:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:45:34,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:45:34,615 INFO L175 Difference]: Start difference. First operand has 376 places, 636 transitions, 8655 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:45:34,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 675 transitions, 10454 flow [2024-06-03 19:45:37,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 675 transitions, 10222 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:37,351 INFO L231 Difference]: Finished difference. Result has 381 places, 642 transitions, 8792 flow [2024-06-03 19:45:37,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8495, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8792, PETRI_PLACES=381, PETRI_TRANSITIONS=642} [2024-06-03 19:45:37,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-03 19:45:37,352 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 642 transitions, 8792 flow [2024-06-03 19:45:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:37,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:37,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:45:37,352 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1320746124, now seen corresponding path program 1 times [2024-06-03 19:45:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444277217] [2024-06-03 19:45:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:37,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:38,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:38,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444277217] [2024-06-03 19:45:38,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444277217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:38,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:38,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:38,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200412280] [2024-06-03 19:45:38,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:38,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:38,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:38,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:45:38,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 642 transitions, 8792 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:38,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:38,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:45:38,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:40,817 INFO L124 PetriNetUnfolderBase]: 6873/10785 cut-off events. [2024-06-03 19:45:40,817 INFO L125 PetriNetUnfolderBase]: For 1139188/1139192 co-relation queries the response was YES. [2024-06-03 19:45:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88390 conditions, 10785 events. 6873/10785 cut-off events. For 1139188/1139192 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 70041 event pairs, 2612 based on Foata normal form. 5/10788 useless extension candidates. Maximal degree in co-relation 88223. Up to 10344 conditions per place. [2024-06-03 19:45:40,996 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 574 selfloop transitions, 115 changer transitions 0/692 dead transitions. [2024-06-03 19:45:40,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 692 transitions, 10766 flow [2024-06-03 19:45:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:45:40,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:45:40,998 INFO L175 Difference]: Start difference. First operand has 381 places, 642 transitions, 8792 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:45:40,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 692 transitions, 10766 flow [2024-06-03 19:45:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 692 transitions, 10616 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:44,667 INFO L231 Difference]: Finished difference. Result has 385 places, 663 transitions, 9173 flow [2024-06-03 19:45:44,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8642, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9173, PETRI_PLACES=385, PETRI_TRANSITIONS=663} [2024-06-03 19:45:44,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-03 19:45:44,668 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 663 transitions, 9173 flow [2024-06-03 19:45:44,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:44,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:44,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:44,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:45:44,668 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:44,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1320736514, now seen corresponding path program 3 times [2024-06-03 19:45:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:44,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245793238] [2024-06-03 19:45:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:44,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:45,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245793238] [2024-06-03 19:45:45,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245793238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:45,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:45,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:45,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879171159] [2024-06-03 19:45:45,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:45,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:45,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 663 transitions, 9173 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:45,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:45,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:48,249 INFO L124 PetriNetUnfolderBase]: 6776/10686 cut-off events. [2024-06-03 19:45:48,249 INFO L125 PetriNetUnfolderBase]: For 1168482/1168487 co-relation queries the response was YES. [2024-06-03 19:45:48,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88865 conditions, 10686 events. 6776/10686 cut-off events. For 1168482/1168487 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 69938 event pairs, 2551 based on Foata normal form. 6/10684 useless extension candidates. Maximal degree in co-relation 88696. Up to 10188 conditions per place. [2024-06-03 19:45:48,421 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 560 selfloop transitions, 102 changer transitions 0/690 dead transitions. [2024-06-03 19:45:48,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 690 transitions, 10639 flow [2024-06-03 19:45:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:45:48,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:45:48,422 INFO L175 Difference]: Start difference. First operand has 385 places, 663 transitions, 9173 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:45:48,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 690 transitions, 10639 flow [2024-06-03 19:45:52,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 690 transitions, 10521 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:45:52,587 INFO L231 Difference]: Finished difference. Result has 390 places, 663 transitions, 9267 flow [2024-06-03 19:45:52,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9055, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9267, PETRI_PLACES=390, PETRI_TRANSITIONS=663} [2024-06-03 19:45:52,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-03 19:45:52,587 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 663 transitions, 9267 flow [2024-06-03 19:45:52,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:52,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:52,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:52,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:45:52,588 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:52,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 65360630, now seen corresponding path program 1 times [2024-06-03 19:45:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:52,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773421932] [2024-06-03 19:45:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:52,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:53,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:53,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773421932] [2024-06-03 19:45:53,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773421932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:53,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:53,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:53,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583802659] [2024-06-03 19:45:53,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:53,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:53,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:53,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:53,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 663 transitions, 9267 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:53,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:53,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:53,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:56,195 INFO L124 PetriNetUnfolderBase]: 6805/10725 cut-off events. [2024-06-03 19:45:56,195 INFO L125 PetriNetUnfolderBase]: For 1201892/1201897 co-relation queries the response was YES. [2024-06-03 19:45:56,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89966 conditions, 10725 events. 6805/10725 cut-off events. For 1201892/1201897 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 70186 event pairs, 2549 based on Foata normal form. 5/10722 useless extension candidates. Maximal degree in co-relation 89795. Up to 10246 conditions per place. [2024-06-03 19:45:56,380 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 594 selfloop transitions, 98 changer transitions 0/720 dead transitions. [2024-06-03 19:45:56,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 720 transitions, 11795 flow [2024-06-03 19:45:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:45:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:45:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-03 19:45:56,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-03 19:45:56,382 INFO L175 Difference]: Start difference. First operand has 390 places, 663 transitions, 9267 flow. Second operand 11 states and 199 transitions. [2024-06-03 19:45:56,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 720 transitions, 11795 flow [2024-06-03 19:46:00,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 720 transitions, 11610 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 19:46:00,340 INFO L231 Difference]: Finished difference. Result has 397 places, 685 transitions, 9786 flow [2024-06-03 19:46:00,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9083, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9786, PETRI_PLACES=397, PETRI_TRANSITIONS=685} [2024-06-03 19:46:00,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-03 19:46:00,340 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 685 transitions, 9786 flow [2024-06-03 19:46:00,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:00,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:00,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:46:00,341 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:00,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:00,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2057332022, now seen corresponding path program 2 times [2024-06-03 19:46:00,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:00,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916927333] [2024-06-03 19:46:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:01,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:01,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916927333] [2024-06-03 19:46:01,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916927333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:01,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:01,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:01,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426297773] [2024-06-03 19:46:01,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:01,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:01,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:01,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:01,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:01,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:01,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 685 transitions, 9786 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:01,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:01,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:01,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:04,042 INFO L124 PetriNetUnfolderBase]: 6802/10721 cut-off events. [2024-06-03 19:46:04,043 INFO L125 PetriNetUnfolderBase]: For 1225454/1225459 co-relation queries the response was YES. [2024-06-03 19:46:04,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90816 conditions, 10721 events. 6802/10721 cut-off events. For 1225454/1225459 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 70165 event pairs, 2556 based on Foata normal form. 5/10718 useless extension candidates. Maximal degree in co-relation 90642. Up to 10243 conditions per place. [2024-06-03 19:46:04,214 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 588 selfloop transitions, 103 changer transitions 0/719 dead transitions. [2024-06-03 19:46:04,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 719 transitions, 11688 flow [2024-06-03 19:46:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:46:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:46:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-03 19:46:04,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:46:04,216 INFO L175 Difference]: Start difference. First operand has 397 places, 685 transitions, 9786 flow. Second operand 12 states and 207 transitions. [2024-06-03 19:46:04,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 719 transitions, 11688 flow [2024-06-03 19:46:08,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 719 transitions, 11468 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-03 19:46:08,268 INFO L231 Difference]: Finished difference. Result has 406 places, 685 transitions, 9780 flow [2024-06-03 19:46:08,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9780, PETRI_PLACES=406, PETRI_TRANSITIONS=685} [2024-06-03 19:46:08,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-03 19:46:08,269 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 685 transitions, 9780 flow [2024-06-03 19:46:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:08,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:08,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:08,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:46:08,270 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:08,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2110258320, now seen corresponding path program 3 times [2024-06-03 19:46:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:08,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061033313] [2024-06-03 19:46:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:08,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061033313] [2024-06-03 19:46:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061033313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956017334] [2024-06-03 19:46:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:09,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:09,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 685 transitions, 9780 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:09,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:09,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:11,833 INFO L124 PetriNetUnfolderBase]: 6826/10754 cut-off events. [2024-06-03 19:46:11,833 INFO L125 PetriNetUnfolderBase]: For 1248525/1248529 co-relation queries the response was YES. [2024-06-03 19:46:11,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90958 conditions, 10754 events. 6826/10754 cut-off events. For 1248525/1248529 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 70319 event pairs, 2456 based on Foata normal form. 6/10758 useless extension candidates. Maximal degree in co-relation 90782. Up to 10314 conditions per place. [2024-06-03 19:46:12,008 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 605 selfloop transitions, 92 changer transitions 0/725 dead transitions. [2024-06-03 19:46:12,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 725 transitions, 11668 flow [2024-06-03 19:46:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:46:12,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:46:12,009 INFO L175 Difference]: Start difference. First operand has 406 places, 685 transitions, 9780 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:46:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 725 transitions, 11668 flow [2024-06-03 19:46:15,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 725 transitions, 11452 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:15,793 INFO L231 Difference]: Finished difference. Result has 409 places, 700 transitions, 10017 flow [2024-06-03 19:46:15,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9597, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10017, PETRI_PLACES=409, PETRI_TRANSITIONS=700} [2024-06-03 19:46:15,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-03 19:46:15,793 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 700 transitions, 10017 flow [2024-06-03 19:46:15,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:15,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:15,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:15,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:46:15,794 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:15,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -883200196, now seen corresponding path program 4 times [2024-06-03 19:46:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366678223] [2024-06-03 19:46:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:16,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366678223] [2024-06-03 19:46:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366678223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50494963] [2024-06-03 19:46:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:16,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:16,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:16,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:16,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 700 transitions, 10017 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:16,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:16,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:16,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:19,549 INFO L124 PetriNetUnfolderBase]: 6831/10761 cut-off events. [2024-06-03 19:46:19,549 INFO L125 PetriNetUnfolderBase]: For 1266607/1266611 co-relation queries the response was YES. [2024-06-03 19:46:19,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91291 conditions, 10761 events. 6831/10761 cut-off events. For 1266607/1266611 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 70361 event pairs, 2455 based on Foata normal form. 5/10764 useless extension candidates. Maximal degree in co-relation 91113. Up to 10320 conditions per place. [2024-06-03 19:46:19,730 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 604 selfloop transitions, 98 changer transitions 0/730 dead transitions. [2024-06-03 19:46:19,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 730 transitions, 11772 flow [2024-06-03 19:46:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:46:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:46:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-03 19:46:19,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-03 19:46:19,732 INFO L175 Difference]: Start difference. First operand has 409 places, 700 transitions, 10017 flow. Second operand 11 states and 191 transitions. [2024-06-03 19:46:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 730 transitions, 11772 flow [2024-06-03 19:46:23,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 730 transitions, 11638 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:23,135 INFO L231 Difference]: Finished difference. Result has 415 places, 703 transitions, 10149 flow [2024-06-03 19:46:23,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10149, PETRI_PLACES=415, PETRI_TRANSITIONS=703} [2024-06-03 19:46:23,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-03 19:46:23,136 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 703 transitions, 10149 flow [2024-06-03 19:46:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:23,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:23,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:46:23,137 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:23,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2040751220, now seen corresponding path program 5 times [2024-06-03 19:46:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:23,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993719811] [2024-06-03 19:46:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:24,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993719811] [2024-06-03 19:46:24,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993719811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:24,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:24,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103550264] [2024-06-03 19:46:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:24,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:24,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:24,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 703 transitions, 10149 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:24,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:24,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:24,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:26,975 INFO L124 PetriNetUnfolderBase]: 6852/10785 cut-off events. [2024-06-03 19:46:26,975 INFO L125 PetriNetUnfolderBase]: For 1300952/1300960 co-relation queries the response was YES. [2024-06-03 19:46:27,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92237 conditions, 10785 events. 6852/10785 cut-off events. For 1300952/1300960 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 70427 event pairs, 2360 based on Foata normal form. 7/10789 useless extension candidates. Maximal degree in co-relation 92057. Up to 10149 conditions per place. [2024-06-03 19:46:27,148 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 558 selfloop transitions, 161 changer transitions 0/747 dead transitions. [2024-06-03 19:46:27,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 747 transitions, 12836 flow [2024-06-03 19:46:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:46:27,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:46:27,149 INFO L175 Difference]: Start difference. First operand has 415 places, 703 transitions, 10149 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:46:27,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 747 transitions, 12836 flow [2024-06-03 19:46:30,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 747 transitions, 12608 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 19:46:30,642 INFO L231 Difference]: Finished difference. Result has 416 places, 718 transitions, 10641 flow [2024-06-03 19:46:30,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9921, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10641, PETRI_PLACES=416, PETRI_TRANSITIONS=718} [2024-06-03 19:46:30,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-03 19:46:30,642 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 718 transitions, 10641 flow [2024-06-03 19:46:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:30,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:30,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:46:30,643 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2040929966, now seen corresponding path program 1 times [2024-06-03 19:46:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686624541] [2024-06-03 19:46:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686624541] [2024-06-03 19:46:31,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686624541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:31,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:31,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:31,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423323149] [2024-06-03 19:46:31,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:31,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:31,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:31,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:31,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:31,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:31,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 718 transitions, 10641 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:31,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:31,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:31,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:34,454 INFO L124 PetriNetUnfolderBase]: 6862/10801 cut-off events. [2024-06-03 19:46:34,455 INFO L125 PetriNetUnfolderBase]: For 1335710/1335717 co-relation queries the response was YES. [2024-06-03 19:46:34,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93469 conditions, 10801 events. 6862/10801 cut-off events. For 1335710/1335717 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 70663 event pairs, 2520 based on Foata normal form. 6/10804 useless extension candidates. Maximal degree in co-relation 93287. Up to 10358 conditions per place. [2024-06-03 19:46:34,624 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 674 selfloop transitions, 54 changer transitions 0/756 dead transitions. [2024-06-03 19:46:34,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 756 transitions, 12371 flow [2024-06-03 19:46:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:46:34,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:46:34,625 INFO L175 Difference]: Start difference. First operand has 416 places, 718 transitions, 10641 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:46:34,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 756 transitions, 12371 flow [2024-06-03 19:46:39,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 756 transitions, 12148 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-03 19:46:39,335 INFO L231 Difference]: Finished difference. Result has 424 places, 728 transitions, 10737 flow [2024-06-03 19:46:39,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10420, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10737, PETRI_PLACES=424, PETRI_TRANSITIONS=728} [2024-06-03 19:46:39,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-03 19:46:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 728 transitions, 10737 flow [2024-06-03 19:46:39,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:39,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:39,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:39,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:46:39,336 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:39,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2041050122, now seen corresponding path program 1 times [2024-06-03 19:46:39,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:39,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207610806] [2024-06-03 19:46:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:39,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207610806] [2024-06-03 19:46:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207610806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:40,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:40,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459660324] [2024-06-03 19:46:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:40,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:46:40,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 728 transitions, 10737 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:40,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:40,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:46:40,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:43,174 INFO L124 PetriNetUnfolderBase]: 6979/10925 cut-off events. [2024-06-03 19:46:43,175 INFO L125 PetriNetUnfolderBase]: For 1355047/1355054 co-relation queries the response was YES. [2024-06-03 19:46:43,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94346 conditions, 10925 events. 6979/10925 cut-off events. For 1355047/1355054 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 71025 event pairs, 2651 based on Foata normal form. 7/10929 useless extension candidates. Maximal degree in co-relation 94160. Up to 10591 conditions per place. [2024-06-03 19:46:43,371 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 676 selfloop transitions, 87 changer transitions 0/766 dead transitions. [2024-06-03 19:46:43,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 766 transitions, 13178 flow [2024-06-03 19:46:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:46:43,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:46:43,373 INFO L175 Difference]: Start difference. First operand has 424 places, 728 transitions, 10737 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:46:43,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 766 transitions, 13178 flow [2024-06-03 19:46:48,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 766 transitions, 13061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:48,191 INFO L231 Difference]: Finished difference. Result has 428 places, 741 transitions, 11015 flow [2024-06-03 19:46:48,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10620, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11015, PETRI_PLACES=428, PETRI_TRANSITIONS=741} [2024-06-03 19:46:48,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-03 19:46:48,191 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 741 transitions, 11015 flow [2024-06-03 19:46:48,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:48,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:48,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:48,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:46:48,192 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:48,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2041049750, now seen corresponding path program 6 times [2024-06-03 19:46:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090000499] [2024-06-03 19:46:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:49,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090000499] [2024-06-03 19:46:49,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090000499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:49,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:49,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:49,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871148618] [2024-06-03 19:46:49,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:49,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:49,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:49,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:49,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:49,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 741 transitions, 11015 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:49,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:49,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:49,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:52,072 INFO L124 PetriNetUnfolderBase]: 6898/10845 cut-off events. [2024-06-03 19:46:52,073 INFO L125 PetriNetUnfolderBase]: For 1388527/1388535 co-relation queries the response was YES. [2024-06-03 19:46:52,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94877 conditions, 10845 events. 6898/10845 cut-off events. For 1388527/1388535 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 70806 event pairs, 2363 based on Foata normal form. 7/10849 useless extension candidates. Maximal degree in co-relation 94690. Up to 10200 conditions per place. [2024-06-03 19:46:52,278 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 167 changer transitions 0/769 dead transitions. [2024-06-03 19:46:52,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 769 transitions, 13245 flow [2024-06-03 19:46:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:46:52,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:46:52,279 INFO L175 Difference]: Start difference. First operand has 428 places, 741 transitions, 11015 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:46:52,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 769 transitions, 13245 flow [2024-06-03 19:46:56,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 769 transitions, 13126 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-03 19:46:56,972 INFO L231 Difference]: Finished difference. Result has 434 places, 744 transitions, 11280 flow [2024-06-03 19:46:56,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10896, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11280, PETRI_PLACES=434, PETRI_TRANSITIONS=744} [2024-06-03 19:46:56,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-03 19:46:56,973 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 744 transitions, 11280 flow [2024-06-03 19:46:56,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:56,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:56,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:56,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:46:56,974 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:56,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2041049936, now seen corresponding path program 2 times [2024-06-03 19:46:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:56,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597685020] [2024-06-03 19:46:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597685020] [2024-06-03 19:46:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597685020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:57,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:46:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402955103] [2024-06-03 19:46:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:46:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:46:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:46:57,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:46:57,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 744 transitions, 11280 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:57,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:57,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:46:57,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:00,798 INFO L124 PetriNetUnfolderBase]: 6936/10901 cut-off events. [2024-06-03 19:47:00,798 INFO L125 PetriNetUnfolderBase]: For 1441516/1441523 co-relation queries the response was YES. [2024-06-03 19:47:00,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96238 conditions, 10901 events. 6936/10901 cut-off events. For 1441516/1441523 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 71323 event pairs, 2565 based on Foata normal form. 6/10904 useless extension candidates. Maximal degree in co-relation 96049. Up to 10328 conditions per place. [2024-06-03 19:47:00,978 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 668 selfloop transitions, 92 changer transitions 0/792 dead transitions. [2024-06-03 19:47:00,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 792 transitions, 13839 flow [2024-06-03 19:47:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:47:00,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:47:00,980 INFO L175 Difference]: Start difference. First operand has 434 places, 744 transitions, 11280 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:47:00,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 792 transitions, 13839 flow [2024-06-03 19:47:06,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 792 transitions, 13527 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:06,794 INFO L231 Difference]: Finished difference. Result has 439 places, 763 transitions, 11536 flow [2024-06-03 19:47:06,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10968, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11536, PETRI_PLACES=439, PETRI_TRANSITIONS=763} [2024-06-03 19:47:06,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-03 19:47:06,795 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 763 transitions, 11536 flow [2024-06-03 19:47:06,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:06,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:06,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:06,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:47:06,796 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:06,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:06,796 INFO L85 PathProgramCache]: Analyzing trace with hash -748462202, now seen corresponding path program 2 times [2024-06-03 19:47:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:06,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309064624] [2024-06-03 19:47:06,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:06,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:07,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309064624] [2024-06-03 19:47:07,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309064624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:07,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:07,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:07,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039601821] [2024-06-03 19:47:07,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:07,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:07,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:07,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:47:07,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 763 transitions, 11536 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:07,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:07,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:47:07,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:10,801 INFO L124 PetriNetUnfolderBase]: 7031/10998 cut-off events. [2024-06-03 19:47:10,801 INFO L125 PetriNetUnfolderBase]: For 1465673/1465680 co-relation queries the response was YES. [2024-06-03 19:47:10,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98511 conditions, 10998 events. 7031/10998 cut-off events. For 1465673/1465680 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 71495 event pairs, 2663 based on Foata normal form. 7/11002 useless extension candidates. Maximal degree in co-relation 98319. Up to 10662 conditions per place. [2024-06-03 19:47:11,002 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 689 selfloop transitions, 95 changer transitions 0/787 dead transitions. [2024-06-03 19:47:11,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 787 transitions, 13632 flow [2024-06-03 19:47:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:47:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:47:11,004 INFO L175 Difference]: Start difference. First operand has 439 places, 763 transitions, 11536 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:47:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 787 transitions, 13632 flow [2024-06-03 19:47:15,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 787 transitions, 13526 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-03 19:47:15,964 INFO L231 Difference]: Finished difference. Result has 446 places, 766 transitions, 11661 flow [2024-06-03 19:47:15,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11661, PETRI_PLACES=446, PETRI_TRANSITIONS=766} [2024-06-03 19:47:15,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-03 19:47:15,965 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 766 transitions, 11661 flow [2024-06-03 19:47:15,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:15,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:15,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:15,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:47:15,965 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:15,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash -768682600, now seen corresponding path program 3 times [2024-06-03 19:47:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:15,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508238835] [2024-06-03 19:47:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508238835] [2024-06-03 19:47:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508238835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144648968] [2024-06-03 19:47:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:16,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:16,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 766 transitions, 11661 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:16,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:16,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:16,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:20,007 INFO L124 PetriNetUnfolderBase]: 6935/10902 cut-off events. [2024-06-03 19:47:20,007 INFO L125 PetriNetUnfolderBase]: For 1489180/1489187 co-relation queries the response was YES. [2024-06-03 19:47:20,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98163 conditions, 10902 events. 6935/10902 cut-off events. For 1489180/1489187 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 71383 event pairs, 2557 based on Foata normal form. 6/10905 useless extension candidates. Maximal degree in co-relation 97968. Up to 10328 conditions per place. [2024-06-03 19:47:20,237 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 660 selfloop transitions, 97 changer transitions 0/790 dead transitions. [2024-06-03 19:47:20,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 790 transitions, 13703 flow [2024-06-03 19:47:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:47:20,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:47:20,239 INFO L175 Difference]: Start difference. First operand has 446 places, 766 transitions, 11661 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:47:20,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 790 transitions, 13703 flow [2024-06-03 19:47:26,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 790 transitions, 13456 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:26,180 INFO L231 Difference]: Finished difference. Result has 449 places, 766 transitions, 11620 flow [2024-06-03 19:47:26,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11420, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11620, PETRI_PLACES=449, PETRI_TRANSITIONS=766} [2024-06-03 19:47:26,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-03 19:47:26,181 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 766 transitions, 11620 flow [2024-06-03 19:47:26,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:26,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:26,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:26,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:47:26,182 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:26,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:26,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2076785654, now seen corresponding path program 3 times [2024-06-03 19:47:26,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:26,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303479172] [2024-06-03 19:47:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:26,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303479172] [2024-06-03 19:47:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303479172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075247558] [2024-06-03 19:47:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:27,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:27,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:47:27,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 766 transitions, 11620 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:27,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:47:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:30,257 INFO L124 PetriNetUnfolderBase]: 7022/10986 cut-off events. [2024-06-03 19:47:30,257 INFO L125 PetriNetUnfolderBase]: For 1497315/1497322 co-relation queries the response was YES. [2024-06-03 19:47:30,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98164 conditions, 10986 events. 7022/10986 cut-off events. For 1497315/1497322 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 71427 event pairs, 2657 based on Foata normal form. 7/10990 useless extension candidates. Maximal degree in co-relation 97968. Up to 10651 conditions per place. [2024-06-03 19:47:30,466 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 692 selfloop transitions, 92 changer transitions 0/787 dead transitions. [2024-06-03 19:47:30,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 787 transitions, 13690 flow [2024-06-03 19:47:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:47:30,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 19:47:30,467 INFO L175 Difference]: Start difference. First operand has 449 places, 766 transitions, 11620 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:47:30,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 787 transitions, 13690 flow [2024-06-03 19:47:35,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 787 transitions, 13475 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:35,718 INFO L231 Difference]: Finished difference. Result has 451 places, 766 transitions, 11595 flow [2024-06-03 19:47:35,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11595, PETRI_PLACES=451, PETRI_TRANSITIONS=766} [2024-06-03 19:47:35,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-03 19:47:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 766 transitions, 11595 flow [2024-06-03 19:47:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:35,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:35,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:35,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:47:35,719 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:35,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2045691380, now seen corresponding path program 7 times [2024-06-03 19:47:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:35,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683693317] [2024-06-03 19:47:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:36,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683693317] [2024-06-03 19:47:36,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683693317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:36,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:36,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:36,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980575322] [2024-06-03 19:47:36,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:36,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:36,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:36,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 766 transitions, 11595 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:36,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:36,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:36,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:39,644 INFO L124 PetriNetUnfolderBase]: 6929/10889 cut-off events. [2024-06-03 19:47:39,644 INFO L125 PetriNetUnfolderBase]: For 1520456/1520464 co-relation queries the response was YES. [2024-06-03 19:47:39,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97768 conditions, 10889 events. 6929/10889 cut-off events. For 1520456/1520464 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 71134 event pairs, 2330 based on Foata normal form. 7/10893 useless extension candidates. Maximal degree in co-relation 97571. Up to 10249 conditions per place. [2024-06-03 19:47:39,881 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 583 selfloop transitions, 172 changer transitions 0/788 dead transitions. [2024-06-03 19:47:39,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 788 transitions, 13827 flow [2024-06-03 19:47:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:47:39,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:47:39,883 INFO L175 Difference]: Start difference. First operand has 451 places, 766 transitions, 11595 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:47:39,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 788 transitions, 13827 flow [2024-06-03 19:47:46,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 788 transitions, 13631 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:46,820 INFO L231 Difference]: Finished difference. Result has 453 places, 766 transitions, 11749 flow [2024-06-03 19:47:46,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11749, PETRI_PLACES=453, PETRI_TRANSITIONS=766} [2024-06-03 19:47:46,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-03 19:47:46,822 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 766 transitions, 11749 flow [2024-06-03 19:47:46,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:46,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:46,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:46,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:47:46,822 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:46,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:46,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2076905996, now seen corresponding path program 8 times [2024-06-03 19:47:46,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:46,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336925334] [2024-06-03 19:47:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:46,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:47,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:47,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336925334] [2024-06-03 19:47:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336925334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:47,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988346101] [2024-06-03 19:47:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:47,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 766 transitions, 11749 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:47,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:47,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:51,629 INFO L124 PetriNetUnfolderBase]: 6926/10891 cut-off events. [2024-06-03 19:47:51,629 INFO L125 PetriNetUnfolderBase]: For 1540440/1540445 co-relation queries the response was YES. [2024-06-03 19:47:51,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98035 conditions, 10891 events. 6926/10891 cut-off events. For 1540440/1540445 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 71254 event pairs, 2415 based on Foata normal form. 5/10894 useless extension candidates. Maximal degree in co-relation 97837. Up to 10482 conditions per place. [2024-06-03 19:47:51,803 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 77 changer transitions 0/785 dead transitions. [2024-06-03 19:47:51,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 785 transitions, 13327 flow [2024-06-03 19:47:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:47:51,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-03 19:47:51,805 INFO L175 Difference]: Start difference. First operand has 453 places, 766 transitions, 11749 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:47:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 785 transitions, 13327 flow [2024-06-03 19:47:57,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 785 transitions, 13003 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:57,635 INFO L231 Difference]: Finished difference. Result has 456 places, 766 transitions, 11586 flow [2024-06-03 19:47:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11425, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11586, PETRI_PLACES=456, PETRI_TRANSITIONS=766} [2024-06-03 19:47:57,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-03 19:47:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 766 transitions, 11586 flow [2024-06-03 19:47:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:57,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:47:57,636 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:57,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1999309448, now seen corresponding path program 4 times [2024-06-03 19:47:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284316852] [2024-06-03 19:47:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:58,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:58,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284316852] [2024-06-03 19:47:58,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284316852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:58,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:58,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:58,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026708594] [2024-06-03 19:47:58,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:58,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:58,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:58,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:58,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:58,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:58,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 766 transitions, 11586 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:58,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:58,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:58,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:02,541 INFO L124 PetriNetUnfolderBase]: 6971/10962 cut-off events. [2024-06-03 19:48:02,541 INFO L125 PetriNetUnfolderBase]: For 1584935/1584939 co-relation queries the response was YES. [2024-06-03 19:48:02,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98529 conditions, 10962 events. 6971/10962 cut-off events. For 1584935/1584939 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 71989 event pairs, 2434 based on Foata normal form. 6/10966 useless extension candidates. Maximal degree in co-relation 98331. Up to 10432 conditions per place. [2024-06-03 19:48:02,885 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 674 selfloop transitions, 103 changer transitions 0/810 dead transitions. [2024-06-03 19:48:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 810 transitions, 13601 flow [2024-06-03 19:48:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-03 19:48:02,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-03 19:48:02,887 INFO L175 Difference]: Start difference. First operand has 456 places, 766 transitions, 11586 flow. Second operand 10 states and 184 transitions. [2024-06-03 19:48:02,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 810 transitions, 13601 flow [2024-06-03 19:48:08,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 810 transitions, 13396 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 19:48:09,009 INFO L231 Difference]: Finished difference. Result has 457 places, 776 transitions, 11743 flow [2024-06-03 19:48:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11381, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11743, PETRI_PLACES=457, PETRI_TRANSITIONS=776} [2024-06-03 19:48:09,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-03 19:48:09,010 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 776 transitions, 11743 flow [2024-06-03 19:48:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:09,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:09,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:09,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:48:09,011 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:09,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1922839434, now seen corresponding path program 2 times [2024-06-03 19:48:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:09,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714994556] [2024-06-03 19:48:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714994556] [2024-06-03 19:48:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714994556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972725546] [2024-06-03 19:48:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:10,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:48:10,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 776 transitions, 11743 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:10,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:10,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:48:10,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:13,855 INFO L124 PetriNetUnfolderBase]: 7089/11089 cut-off events. [2024-06-03 19:48:13,855 INFO L125 PetriNetUnfolderBase]: For 1606200/1606204 co-relation queries the response was YES. [2024-06-03 19:48:14,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99722 conditions, 11089 events. 7089/11089 cut-off events. For 1606200/1606204 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 72207 event pairs, 2505 based on Foata normal form. 5/11092 useless extension candidates. Maximal degree in co-relation 99522. Up to 10715 conditions per place. [2024-06-03 19:48:14,052 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 697 selfloop transitions, 120 changer transitions 0/820 dead transitions. [2024-06-03 19:48:14,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 820 transitions, 13896 flow [2024-06-03 19:48:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:48:14,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:48:14,054 INFO L175 Difference]: Start difference. First operand has 457 places, 776 transitions, 11743 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:48:14,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 820 transitions, 13896 flow [2024-06-03 19:48:19,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 820 transitions, 13773 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:19,792 INFO L231 Difference]: Finished difference. Result has 461 places, 792 transitions, 12072 flow [2024-06-03 19:48:19,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11620, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12072, PETRI_PLACES=461, PETRI_TRANSITIONS=792} [2024-06-03 19:48:19,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-03 19:48:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 792 transitions, 12072 flow [2024-06-03 19:48:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:19,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:19,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:19,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:48:19,793 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:19,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1922839124, now seen corresponding path program 5 times [2024-06-03 19:48:19,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:19,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678454135] [2024-06-03 19:48:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:20,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:20,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678454135] [2024-06-03 19:48:20,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678454135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:20,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:20,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263397437] [2024-06-03 19:48:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:21,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:21,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 792 transitions, 12072 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:21,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:21,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:21,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:24,776 INFO L124 PetriNetUnfolderBase]: 7012/11020 cut-off events. [2024-06-03 19:48:24,777 INFO L125 PetriNetUnfolderBase]: For 1643562/1643566 co-relation queries the response was YES. [2024-06-03 19:48:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99961 conditions, 11020 events. 7012/11020 cut-off events. For 1643562/1643566 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 72316 event pairs, 2447 based on Foata normal form. 6/11024 useless extension candidates. Maximal degree in co-relation 99759. Up to 10556 conditions per place. [2024-06-03 19:48:24,957 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 693 selfloop transitions, 93 changer transitions 0/824 dead transitions. [2024-06-03 19:48:24,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 824 transitions, 13815 flow [2024-06-03 19:48:24,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:24,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-03 19:48:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-03 19:48:24,959 INFO L175 Difference]: Start difference. First operand has 461 places, 792 transitions, 12072 flow. Second operand 10 states and 178 transitions. [2024-06-03 19:48:24,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 824 transitions, 13815 flow [2024-06-03 19:48:30,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 824 transitions, 13701 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:30,525 INFO L231 Difference]: Finished difference. Result has 467 places, 796 transitions, 12222 flow [2024-06-03 19:48:30,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11958, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12222, PETRI_PLACES=467, PETRI_TRANSITIONS=796} [2024-06-03 19:48:30,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-03 19:48:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 796 transitions, 12222 flow [2024-06-03 19:48:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:30,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:30,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:48:30,526 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:30,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1931170994, now seen corresponding path program 6 times [2024-06-03 19:48:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942877084] [2024-06-03 19:48:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942877084] [2024-06-03 19:48:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942877084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:31,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181913876] [2024-06-03 19:48:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:31,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:31,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 796 transitions, 12222 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:31,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:31,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:31,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:35,975 INFO L124 PetriNetUnfolderBase]: 7022/11031 cut-off events. [2024-06-03 19:48:35,975 INFO L125 PetriNetUnfolderBase]: For 1670807/1670811 co-relation queries the response was YES. [2024-06-03 19:48:36,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100519 conditions, 11031 events. 7022/11031 cut-off events. For 1670807/1670811 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 72367 event pairs, 2454 based on Foata normal form. 6/11035 useless extension candidates. Maximal degree in co-relation 100315. Up to 10598 conditions per place. [2024-06-03 19:48:36,163 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 703 selfloop transitions, 81 changer transitions 0/822 dead transitions. [2024-06-03 19:48:36,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 822 transitions, 13920 flow [2024-06-03 19:48:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 19:48:36,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-03 19:48:36,164 INFO L175 Difference]: Start difference. First operand has 467 places, 796 transitions, 12222 flow. Second operand 10 states and 173 transitions. [2024-06-03 19:48:36,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 822 transitions, 13920 flow [2024-06-03 19:48:42,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 822 transitions, 13722 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:42,048 INFO L231 Difference]: Finished difference. Result has 469 places, 798 transitions, 12240 flow [2024-06-03 19:48:42,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12024, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12240, PETRI_PLACES=469, PETRI_TRANSITIONS=798} [2024-06-03 19:48:42,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-03 19:48:42,049 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 798 transitions, 12240 flow [2024-06-03 19:48:42,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:42,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:42,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:42,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:48:42,049 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:42,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1931181534, now seen corresponding path program 3 times [2024-06-03 19:48:42,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:42,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628429379] [2024-06-03 19:48:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:42,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628429379] [2024-06-03 19:48:43,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628429379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:43,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:43,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:43,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215833305] [2024-06-03 19:48:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:43,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:48:43,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 798 transitions, 12240 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:43,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:43,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:48:43,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:47,351 INFO L124 PetriNetUnfolderBase]: 7133/11150 cut-off events. [2024-06-03 19:48:47,351 INFO L125 PetriNetUnfolderBase]: For 1686876/1686880 co-relation queries the response was YES. [2024-06-03 19:48:47,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101323 conditions, 11150 events. 7133/11150 cut-off events. For 1686876/1686880 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 72643 event pairs, 2513 based on Foata normal form. 5/11153 useless extension candidates. Maximal degree in co-relation 101118. Up to 10828 conditions per place. [2024-06-03 19:48:47,528 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 722 selfloop transitions, 108 changer transitions 0/833 dead transitions. [2024-06-03 19:48:47,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 833 transitions, 14135 flow [2024-06-03 19:48:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 19:48:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-03 19:48:47,529 INFO L175 Difference]: Start difference. First operand has 469 places, 798 transitions, 12240 flow. Second operand 10 states and 168 transitions. [2024-06-03 19:48:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 833 transitions, 14135 flow [2024-06-03 19:48:53,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 833 transitions, 13953 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:53,395 INFO L231 Difference]: Finished difference. Result has 471 places, 810 transitions, 12445 flow [2024-06-03 19:48:53,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12058, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12445, PETRI_PLACES=471, PETRI_TRANSITIONS=810} [2024-06-03 19:48:53,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-03 19:48:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 810 transitions, 12445 flow [2024-06-03 19:48:53,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:53,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:53,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:53,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:48:53,396 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:53,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1931171304, now seen corresponding path program 4 times [2024-06-03 19:48:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:53,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150498674] [2024-06-03 19:48:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150498674] [2024-06-03 19:48:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150498674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667540678] [2024-06-03 19:48:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:54,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-03 19:48:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 810 transitions, 12445 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-03 19:48:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:58,311 INFO L124 PetriNetUnfolderBase]: 7138/11157 cut-off events. [2024-06-03 19:48:58,311 INFO L125 PetriNetUnfolderBase]: For 1714001/1714005 co-relation queries the response was YES. [2024-06-03 19:48:58,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101656 conditions, 11157 events. 7138/11157 cut-off events. For 1714001/1714005 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 72725 event pairs, 2511 based on Foata normal form. 5/11160 useless extension candidates. Maximal degree in co-relation 101450. Up to 10821 conditions per place. [2024-06-03 19:48:58,488 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 716 selfloop transitions, 117 changer transitions 0/836 dead transitions. [2024-06-03 19:48:58,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 836 transitions, 14253 flow [2024-06-03 19:48:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 19:48:58,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:48:58,489 INFO L175 Difference]: Start difference. First operand has 471 places, 810 transitions, 12445 flow. Second operand 10 states and 170 transitions. [2024-06-03 19:48:58,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 836 transitions, 14253 flow