./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 cde23df1 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-cde23df-m [2024-06-14 12:19:38,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:19:39,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:19:39,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:19:39,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:19:39,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:19:39,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:19:39,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:19:39,039 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:19:39,043 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:19:39,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:19:39,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:19:39,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:19:39,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:19:39,045 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:19:39,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:19:39,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:19:39,046 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:19:39,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:19:39,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:19:39,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:19:39,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:19:39,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:19:39,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:19:39,047 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:19:39,047 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:19:39,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:19:39,048 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:19:39,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:19:39,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:19:39,049 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:19:39,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:19:39,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:19:39,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:19:39,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:19:39,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:19:39,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:19:39,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:19:39,051 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:19:39,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:19:39,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:19:39,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:19:39,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:19:39,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:19:39,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:19:39,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:19:39,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:19:39,288 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:19:39,288 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:19:39,289 INFO L431 ainManager$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 [2024-06-14 12:19:39,421 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:19:39,421 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:19:39,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-14 12:19:40,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:19:40,727 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:19:40,730 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035.oepc.i [2024-06-14 12:19:40,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8471b6c6/8749362c405844e186cbfb629b1e46a8/FLAG5dc1ab116 [2024-06-14 12:19:40,754 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8471b6c6/8749362c405844e186cbfb629b1e46a8 [2024-06-14 12:19:40,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:19:40,759 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:19:40,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:19:40,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:19:40,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:19:40,764 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:19:39" (1/2) ... [2024-06-14 12:19:40,765 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4de56d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:19:40, skipping insertion in model container [2024-06-14 12:19:40,765 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:19:39" (1/2) ... [2024-06-14 12:19:40,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@189fe283 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:19:40, skipping insertion in model container [2024-06-14 12:19:40,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:19:40" (2/2) ... [2024-06-14 12:19:40,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4de56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:40, skipping insertion in model container [2024-06-14 12:19:40,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:19:40" (2/2) ... [2024-06-14 12:19:40,767 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:19:40,843 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:19:40,844 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 12:19:40,844 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || a$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))) [2024-06-14 12:19:40,844 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))) [2024-06-14 12:19:40,845 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:19:40,845 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-14 12:19:40,881 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:19:41,240 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:19:41,249 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:19:41,383 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:19:41,434 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:19:41,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41 WrapperNode [2024-06-14 12:19:41,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:19:41,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:19:41,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:19:41,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:19:41,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,482 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-14 12:19:41,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:19:41,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:19:41,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:19:41,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:19:41,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,494 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,508 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]. [2024-06-14 12:19:41,508 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,526 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:19:41,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:19:41,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:19:41,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:19:41,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (1/1) ... [2024-06-14 12:19:41,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:19:41,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:19:41,557 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) [2024-06-14 12:19:41,576 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 [2024-06-14 12:19:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:19:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:19:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:19:41,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:19:41,588 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:19:41,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:19:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:19:41,589 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:19:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:19:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:19:41,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:19:41,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:19:41,590 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:19:41,700 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:19:41,702 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:19:42,022 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:19:42,023 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:19:42,157 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:19:42,157 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:19:42,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:19:42 BoogieIcfgContainer [2024-06-14 12:19:42,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:19:42,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:19:42,162 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:19:42,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:19:42,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:19:39" (1/4) ... [2024-06-14 12:19:42,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a5009 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:19:42, skipping insertion in model container [2024-06-14 12:19:42,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:19:40" (2/4) ... [2024-06-14 12:19:42,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a5009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:19:42, skipping insertion in model container [2024-06-14 12:19:42,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:19:41" (3/4) ... [2024-06-14 12:19:42,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a5009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:19:42, skipping insertion in model container [2024-06-14 12:19:42,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:19:42" (4/4) ... [2024-06-14 12:19:42,167 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035.oepc.i [2024-06-14 12:19:42,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:19:42,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:19:42,180 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:19:42,224 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:19:42,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:19:42,288 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:19:42,288 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:19:42,290 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. [2024-06-14 12:19:42,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:19:42,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:19:42,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:19:42,311 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;@4a814bc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:19:42,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:19:42,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:19:42,315 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:19:42,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:19:42,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:42,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:19:42,316 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)] === [2024-06-14 12:19:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1094188686, now seen corresponding path program 1 times [2024-06-14 12:19:42,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905576731] [2024-06-14 12:19:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:42,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905576731] [2024-06-14 12:19:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905576731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:19:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668161524] [2024-06-14 12:19:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:19:43,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:19:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:19:43,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:19:43,647 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) [2024-06-14 12:19:43,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:43,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:19:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:43,997 INFO L124 PetriNetUnfolderBase]: 1286/2002 cut-off events. [2024-06-14 12:19:43,998 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 12:19:44,002 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. [2024-06-14 12:19:44,010 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:19:44,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 179 flow [2024-06-14 12:19:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:19:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:19:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-14 12:19:44,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-14 12:19:44,020 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 77 transitions. [2024-06-14 12:19:44,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 179 flow [2024-06-14 12:19:44,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:44,024 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:19:44,025 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} [2024-06-14 12:19:44,027 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:19:44,028 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:19:44,028 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) [2024-06-14 12:19:44,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:19:44,029 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)] === [2024-06-14 12:19:44,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 751697169, now seen corresponding path program 1 times [2024-06-14 12:19:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126533931] [2024-06-14 12:19:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:44,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:44,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126533931] [2024-06-14 12:19:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126533931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:44,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:44,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:19:44,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984101339] [2024-06-14 12:19:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:19:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:19:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:19:44,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:19:44,869 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) [2024-06-14 12:19:44,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:44,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:19:44,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:45,119 INFO L124 PetriNetUnfolderBase]: 1280/2001 cut-off events. [2024-06-14 12:19:45,119 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-14 12:19:45,122 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. [2024-06-14 12:19:45,129 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:19:45,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-14 12:19:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:19:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:19:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-14 12:19:45,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 12:19:45,131 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-14 12:19:45,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-14 12:19:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:19:45,132 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:19:45,133 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} [2024-06-14 12:19:45,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:19:45,133 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:19:45,133 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) [2024-06-14 12:19:45,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:45,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:45,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:19:45,134 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)] === [2024-06-14 12:19:45,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 826512560, now seen corresponding path program 1 times [2024-06-14 12:19:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045001353] [2024-06-14 12:19:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:46,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045001353] [2024-06-14 12:19:46,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045001353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:46,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:46,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:19:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477903007] [2024-06-14 12:19:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:19:46,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:19:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:19:46,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:19:46,712 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) [2024-06-14 12:19:46,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:46,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:19:46,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:47,126 INFO L124 PetriNetUnfolderBase]: 1552/2400 cut-off events. [2024-06-14 12:19:47,126 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-06-14 12:19:47,131 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. [2024-06-14 12:19:47,138 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-14 12:19:47,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 380 flow [2024-06-14 12:19:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:19:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:19:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 12:19:47,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 12:19:47,144 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 138 transitions. [2024-06-14 12:19:47,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 380 flow [2024-06-14 12:19:47,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:19:47,148 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-14 12:19:47,148 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} [2024-06-14 12:19:47,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:19:47,149 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-14 12:19:47,149 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) [2024-06-14 12:19:47,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:47,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:19:47,150 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)] === [2024-06-14 12:19:47,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash -147913140, now seen corresponding path program 1 times [2024-06-14 12:19:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422204249] [2024-06-14 12:19:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:47,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:48,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:48,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422204249] [2024-06-14 12:19:48,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422204249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:48,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:19:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031799109] [2024-06-14 12:19:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:19:48,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:19:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:19:48,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:19:48,850 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) [2024-06-14 12:19:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:48,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:19:48,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:49,414 INFO L124 PetriNetUnfolderBase]: 1543/2383 cut-off events. [2024-06-14 12:19:49,414 INFO L125 PetriNetUnfolderBase]: For 2475/2475 co-relation queries the response was YES. [2024-06-14 12:19:49,418 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. [2024-06-14 12:19:49,426 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-14 12:19:49,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 440 flow [2024-06-14 12:19:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 12:19:49,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149501661129569 [2024-06-14 12:19:49,428 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 155 transitions. [2024-06-14 12:19:49,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 440 flow [2024-06-14 12:19:49,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 412 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:49,433 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-14 12:19:49,433 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} [2024-06-14 12:19:49,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 12:19:49,435 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-14 12:19:49,435 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) [2024-06-14 12:19:49,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:49,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:49,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:19:49,436 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)] === [2024-06-14 12:19:49,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash -841682960, now seen corresponding path program 1 times [2024-06-14 12:19:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:49,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220784783] [2024-06-14 12:19:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:50,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220784783] [2024-06-14 12:19:50,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220784783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:50,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:50,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:19:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85418560] [2024-06-14 12:19:50,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:19:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:19:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:19:50,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:50,076 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) [2024-06-14 12:19:50,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:50,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:50,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:50,475 INFO L124 PetriNetUnfolderBase]: 1533/2403 cut-off events. [2024-06-14 12:19:50,476 INFO L125 PetriNetUnfolderBase]: For 3736/3736 co-relation queries the response was YES. [2024-06-14 12:19:50,481 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. [2024-06-14 12:19:50,490 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-14 12:19:50,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 379 flow [2024-06-14 12:19:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:19:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:19:50,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-14 12:19:50,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-14 12:19:50,491 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 98 transitions. [2024-06-14 12:19:50,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 379 flow [2024-06-14 12:19:50,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 340 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:50,499 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-14 12:19:50,499 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} [2024-06-14 12:19:50,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 12:19:50,501 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-14 12:19:50,501 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) [2024-06-14 12:19:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:19:50,505 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)] === [2024-06-14 12:19:50,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1409161457, now seen corresponding path program 1 times [2024-06-14 12:19:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647540252] [2024-06-14 12:19:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647540252] [2024-06-14 12:19:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647540252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:51,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:19:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007143420] [2024-06-14 12:19:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:19:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:19:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:19:51,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:51,398 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) [2024-06-14 12:19:51,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:51,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:51,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:51,814 INFO L124 PetriNetUnfolderBase]: 1571/2453 cut-off events. [2024-06-14 12:19:51,814 INFO L125 PetriNetUnfolderBase]: For 5193/5193 co-relation queries the response was YES. [2024-06-14 12:19:51,817 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. [2024-06-14 12:19:51,827 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-14 12:19:51,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 514 flow [2024-06-14 12:19:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:19:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:19:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 12:19:51,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:19:51,829 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 123 transitions. [2024-06-14 12:19:51,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 514 flow [2024-06-14 12:19:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 480 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:51,833 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 312 flow [2024-06-14 12:19:51,833 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} [2024-06-14 12:19:51,836 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-14 12:19:51,836 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 312 flow [2024-06-14 12:19:51,836 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) [2024-06-14 12:19:51,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:51,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:19:51,837 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)] === [2024-06-14 12:19:51,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1087960847, now seen corresponding path program 2 times [2024-06-14 12:19:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:51,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81520984] [2024-06-14 12:19:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:52,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:52,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81520984] [2024-06-14 12:19:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81520984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:52,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:19:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699263909] [2024-06-14 12:19:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:52,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:19:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:19:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:19:52,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:52,631 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) [2024-06-14 12:19:52,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:52,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:52,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:53,064 INFO L124 PetriNetUnfolderBase]: 1561/2442 cut-off events. [2024-06-14 12:19:53,065 INFO L125 PetriNetUnfolderBase]: For 7111/7111 co-relation queries the response was YES. [2024-06-14 12:19:53,070 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. [2024-06-14 12:19:53,078 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-14 12:19:53,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 494 flow [2024-06-14 12:19:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:19:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:19:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:19:53,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 12:19:53,080 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 312 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:19:53,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 494 flow [2024-06-14 12:19:53,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 466 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-14 12:19:53,087 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 314 flow [2024-06-14 12:19:53,087 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} [2024-06-14 12:19:53,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-14 12:19:53,088 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 314 flow [2024-06-14 12:19:53,089 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) [2024-06-14 12:19:53,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:53,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:19:53,090 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)] === [2024-06-14 12:19:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1340550333, now seen corresponding path program 1 times [2024-06-14 12:19:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:53,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408487295] [2024-06-14 12:19:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:54,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408487295] [2024-06-14 12:19:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408487295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853886817] [2024-06-14 12:19:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:54,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:54,152 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) [2024-06-14 12:19:54,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:54,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:54,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:54,640 INFO L124 PetriNetUnfolderBase]: 1583/2466 cut-off events. [2024-06-14 12:19:54,640 INFO L125 PetriNetUnfolderBase]: For 8491/8491 co-relation queries the response was YES. [2024-06-14 12:19:54,645 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. [2024-06-14 12:19:54,658 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 12:19:54,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 572 flow [2024-06-14 12:19:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:19:54,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:19:54,663 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 314 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:19:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 572 flow [2024-06-14 12:19:54,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 536 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:54,672 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-14 12:19:54,672 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} [2024-06-14 12:19:54,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:19:54,674 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-14 12:19:54,674 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) [2024-06-14 12:19:54,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:54,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:19:54,675 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)] === [2024-06-14 12:19:54,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash -734331353, now seen corresponding path program 2 times [2024-06-14 12:19:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:54,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665360674] [2024-06-14 12:19:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:55,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665360674] [2024-06-14 12:19:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665360674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848491308] [2024-06-14 12:19:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:55,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:55,658 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) [2024-06-14 12:19:55,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:55,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:56,073 INFO L124 PetriNetUnfolderBase]: 1621/2518 cut-off events. [2024-06-14 12:19:56,074 INFO L125 PetriNetUnfolderBase]: For 10846/10846 co-relation queries the response was YES. [2024-06-14 12:19:56,078 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. [2024-06-14 12:19:56,086 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-14 12:19:56,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 688 flow [2024-06-14 12:19:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:56,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:56,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:19:56,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:19:56,087 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:19:56,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 688 flow [2024-06-14 12:19:56,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 646 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:56,095 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 428 flow [2024-06-14 12:19:56,096 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} [2024-06-14 12:19:56,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 12:19:56,097 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 428 flow [2024-06-14 12:19:56,097 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) [2024-06-14 12:19:56,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:56,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:56,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:19:56,097 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)] === [2024-06-14 12:19:56,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 632952965, now seen corresponding path program 3 times [2024-06-14 12:19:56,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618626460] [2024-06-14 12:19:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:56,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:56,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:56,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618626460] [2024-06-14 12:19:56,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618626460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:56,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:56,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:56,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586347077] [2024-06-14 12:19:56,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:57,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:57,053 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) [2024-06-14 12:19:57,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:57,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:57,464 INFO L124 PetriNetUnfolderBase]: 1611/2507 cut-off events. [2024-06-14 12:19:57,464 INFO L125 PetriNetUnfolderBase]: For 13676/13676 co-relation queries the response was YES. [2024-06-14 12:19:57,469 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. [2024-06-14 12:19:57,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-14 12:19:57,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 652 flow [2024-06-14 12:19:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:19:57,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:19:57,481 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 428 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:19:57,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 652 flow [2024-06-14 12:19:57,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 596 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:19:57,490 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 408 flow [2024-06-14 12:19:57,491 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} [2024-06-14 12:19:57,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 12:19:57,492 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 408 flow [2024-06-14 12:19:57,492 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) [2024-06-14 12:19:57,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:57,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:57,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:19:57,493 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)] === [2024-06-14 12:19:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -556953569, now seen corresponding path program 1 times [2024-06-14 12:19:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004944087] [2024-06-14 12:19:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:58,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004944087] [2024-06-14 12:19:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004944087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:58,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:58,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533047105] [2024-06-14 12:19:58,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:58,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:58,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:19:58,487 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) [2024-06-14 12:19:58,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:58,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:19:58,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:58,961 INFO L124 PetriNetUnfolderBase]: 1962/2996 cut-off events. [2024-06-14 12:19:58,962 INFO L125 PetriNetUnfolderBase]: For 18161/18161 co-relation queries the response was YES. [2024-06-14 12:19:58,968 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. [2024-06-14 12:19:58,979 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-14 12:19:58,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 683 flow [2024-06-14 12:19:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:19:58,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:19:58,981 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 408 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:19:58,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 683 flow [2024-06-14 12:19:58,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 634 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:58,992 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 453 flow [2024-06-14 12:19:58,993 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} [2024-06-14 12:19:58,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-14 12:19:58,993 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 453 flow [2024-06-14 12:19:58,993 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) [2024-06-14 12:19:58,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:58,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:58,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:19:58,994 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)] === [2024-06-14 12:19:58,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1086485628, now seen corresponding path program 1 times [2024-06-14 12:19:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:58,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135174013] [2024-06-14 12:19:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:58,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135174013] [2024-06-14 12:19:59,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135174013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:19:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928471389] [2024-06-14 12:19:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:19:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:19:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:19:59,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:19:59,577 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) [2024-06-14 12:19:59,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:59,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:19:59,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:59,978 INFO L124 PetriNetUnfolderBase]: 1799/2819 cut-off events. [2024-06-14 12:19:59,978 INFO L125 PetriNetUnfolderBase]: For 20978/20984 co-relation queries the response was YES. [2024-06-14 12:19:59,984 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. [2024-06-14 12:20:00,030 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 68 selfloop transitions, 8 changer transitions 0/84 dead transitions. [2024-06-14 12:20:00,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 645 flow [2024-06-14 12:20:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:20:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:20:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 12:20:00,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 12:20:00,032 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 453 flow. Second operand 5 states and 93 transitions. [2024-06-14 12:20:00,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 645 flow [2024-06-14 12:20:00,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 600 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:00,042 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 456 flow [2024-06-14 12:20:00,042 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} [2024-06-14 12:20:00,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 12:20:00,042 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 456 flow [2024-06-14 12:20:00,043 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) [2024-06-14 12:20:00,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:00,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:00,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:20:00,043 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)] === [2024-06-14 12:20:00,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1293243858, now seen corresponding path program 1 times [2024-06-14 12:20:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:00,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615630259] [2024-06-14 12:20:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:01,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:01,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615630259] [2024-06-14 12:20:01,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615630259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:01,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:01,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494663683] [2024-06-14 12:20:01,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:01,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:01,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:01,292 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) [2024-06-14 12:20:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:01,920 INFO L124 PetriNetUnfolderBase]: 1897/2929 cut-off events. [2024-06-14 12:20:01,921 INFO L125 PetriNetUnfolderBase]: For 24175/24175 co-relation queries the response was YES. [2024-06-14 12:20:01,925 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. [2024-06-14 12:20:01,960 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 94 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-14 12:20:01,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 123 transitions, 912 flow [2024-06-14 12:20:01,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:20:01,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:20:01,962 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 456 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:20:01,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 123 transitions, 912 flow [2024-06-14 12:20:01,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 886 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:01,976 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 558 flow [2024-06-14 12:20:01,976 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} [2024-06-14 12:20:01,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 12:20:01,977 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 558 flow [2024-06-14 12:20:01,977 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) [2024-06-14 12:20:01,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:01,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:20:01,978 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)] === [2024-06-14 12:20:01,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1293153648, now seen corresponding path program 2 times [2024-06-14 12:20:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930441933] [2024-06-14 12:20:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:01,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:03,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930441933] [2024-06-14 12:20:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930441933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:03,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:03,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:03,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272186270] [2024-06-14 12:20:03,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:03,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:03,314 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) [2024-06-14 12:20:03,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:03,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:03,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:03,920 INFO L124 PetriNetUnfolderBase]: 1887/2915 cut-off events. [2024-06-14 12:20:03,920 INFO L125 PetriNetUnfolderBase]: For 28078/28078 co-relation queries the response was YES. [2024-06-14 12:20:03,926 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. [2024-06-14 12:20:03,934 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-14 12:20:03,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 113 transitions, 854 flow [2024-06-14 12:20:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:20:03,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:20:03,936 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 558 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:20:03,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 113 transitions, 854 flow [2024-06-14 12:20:03,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 784 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:03,949 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 530 flow [2024-06-14 12:20:03,950 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} [2024-06-14 12:20:03,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:20:03,950 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 530 flow [2024-06-14 12:20:03,950 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) [2024-06-14 12:20:03,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:03,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:03,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:20:03,951 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)] === [2024-06-14 12:20:03,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 525217412, now seen corresponding path program 3 times [2024-06-14 12:20:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:03,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063008644] [2024-06-14 12:20:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:05,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063008644] [2024-06-14 12:20:05,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063008644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:05,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:05,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:05,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857226211] [2024-06-14 12:20:05,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:05,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:05,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:05,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:05,477 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) [2024-06-14 12:20:05,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:05,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:06,095 INFO L124 PetriNetUnfolderBase]: 1909/2944 cut-off events. [2024-06-14 12:20:06,095 INFO L125 PetriNetUnfolderBase]: For 31614/31614 co-relation queries the response was YES. [2024-06-14 12:20:06,101 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. [2024-06-14 12:20:06,110 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 78 selfloop transitions, 31 changer transitions 0/115 dead transitions. [2024-06-14 12:20:06,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 870 flow [2024-06-14 12:20:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:20:06,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:20:06,112 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 530 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:20:06,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 870 flow [2024-06-14 12:20:06,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 828 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:06,126 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 604 flow [2024-06-14 12:20:06,126 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} [2024-06-14 12:20:06,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 12:20:06,127 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 604 flow [2024-06-14 12:20:06,127 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) [2024-06-14 12:20:06,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:06,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:06,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:20:06,127 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)] === [2024-06-14 12:20:06,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1853293680, now seen corresponding path program 4 times [2024-06-14 12:20:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:06,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445423086] [2024-06-14 12:20:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:07,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445423086] [2024-06-14 12:20:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445423086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:07,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:07,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189862134] [2024-06-14 12:20:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:07,318 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) [2024-06-14 12:20:07,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:07,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:07,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:07,830 INFO L124 PetriNetUnfolderBase]: 1902/2940 cut-off events. [2024-06-14 12:20:07,830 INFO L125 PetriNetUnfolderBase]: For 35932/35932 co-relation queries the response was YES. [2024-06-14 12:20:07,837 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. [2024-06-14 12:20:07,848 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-14 12:20:07,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1168 flow [2024-06-14 12:20:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:20:07,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:20:07,849 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 604 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:20:07,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1168 flow [2024-06-14 12:20:07,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1076 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:07,866 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 736 flow [2024-06-14 12:20:07,866 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} [2024-06-14 12:20:07,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 12:20:07,867 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 736 flow [2024-06-14 12:20:07,867 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) [2024-06-14 12:20:07,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:07,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:20:07,867 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)] === [2024-06-14 12:20:07,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:07,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1244786950, now seen corresponding path program 1 times [2024-06-14 12:20:07,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:07,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216994817] [2024-06-14 12:20:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:09,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:09,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216994817] [2024-06-14 12:20:09,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216994817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:09,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:09,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864661898] [2024-06-14 12:20:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:09,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:09,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:09,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:09,166 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) [2024-06-14 12:20:09,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:09,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:09,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:09,810 INFO L124 PetriNetUnfolderBase]: 2063/3164 cut-off events. [2024-06-14 12:20:09,810 INFO L125 PetriNetUnfolderBase]: For 42559/42559 co-relation queries the response was YES. [2024-06-14 12:20:09,818 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. [2024-06-14 12:20:09,828 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-06-14 12:20:09,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1054 flow [2024-06-14 12:20:09,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:20:09,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:20:09,831 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 736 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:20:09,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1054 flow [2024-06-14 12:20:09,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 965 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:09,864 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 752 flow [2024-06-14 12:20:09,864 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} [2024-06-14 12:20:09,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 12:20:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 752 flow [2024-06-14 12:20:09,865 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) [2024-06-14 12:20:09,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:09,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:20:09,865 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)] === [2024-06-14 12:20:09,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash 692985106, now seen corresponding path program 1 times [2024-06-14 12:20:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:09,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676836709] [2024-06-14 12:20:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676836709] [2024-06-14 12:20:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676836709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:10,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527313383] [2024-06-14 12:20:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:10,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:10,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:10,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:10,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:10,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:10,598 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) [2024-06-14 12:20:10,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:10,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:10,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:11,195 INFO L124 PetriNetUnfolderBase]: 2140/3233 cut-off events. [2024-06-14 12:20:11,196 INFO L125 PetriNetUnfolderBase]: For 52883/52904 co-relation queries the response was YES. [2024-06-14 12:20:11,205 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. [2024-06-14 12:20:11,216 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 89 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2024-06-14 12:20:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 998 flow [2024-06-14 12:20:11,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:20:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:20:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:20:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:20:11,217 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 752 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:20:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 998 flow [2024-06-14 12:20:11,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 110 transitions, 954 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:11,252 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 768 flow [2024-06-14 12:20:11,252 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} [2024-06-14 12:20:11,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 12:20:11,253 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 768 flow [2024-06-14 12:20:11,253 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) [2024-06-14 12:20:11,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:11,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:11,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:20:11,253 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)] === [2024-06-14 12:20:11,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:11,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1994663196, now seen corresponding path program 1 times [2024-06-14 12:20:11,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:11,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825445303] [2024-06-14 12:20:11,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:11,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:12,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825445303] [2024-06-14 12:20:12,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825445303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:12,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685643008] [2024-06-14 12:20:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:12,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:12,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:12,173 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) [2024-06-14 12:20:12,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:12,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:12,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:12,960 INFO L124 PetriNetUnfolderBase]: 2321/3604 cut-off events. [2024-06-14 12:20:12,961 INFO L125 PetriNetUnfolderBase]: For 64902/64910 co-relation queries the response was YES. [2024-06-14 12:20:12,971 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. [2024-06-14 12:20:12,985 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 42 changer transitions 0/177 dead transitions. [2024-06-14 12:20:12,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 177 transitions, 1516 flow [2024-06-14 12:20:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 12:20:13,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-14 12:20:13,002 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 768 flow. Second operand 11 states and 222 transitions. [2024-06-14 12:20:13,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 177 transitions, 1516 flow [2024-06-14 12:20:13,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 177 transitions, 1478 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:13,037 INFO L231 Difference]: Finished difference. Result has 104 places, 122 transitions, 1000 flow [2024-06-14 12:20:13,038 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} [2024-06-14 12:20:13,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 12:20:13,038 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 122 transitions, 1000 flow [2024-06-14 12:20:13,038 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) [2024-06-14 12:20:13,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:13,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:20:13,039 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)] === [2024-06-14 12:20:13,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1145473588, now seen corresponding path program 2 times [2024-06-14 12:20:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192191318] [2024-06-14 12:20:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:13,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:13,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:13,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192191318] [2024-06-14 12:20:13,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192191318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:13,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:13,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:13,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540205736] [2024-06-14 12:20:13,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:14,067 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) [2024-06-14 12:20:14,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:14,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:14,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:15,005 INFO L124 PetriNetUnfolderBase]: 2804/4392 cut-off events. [2024-06-14 12:20:15,005 INFO L125 PetriNetUnfolderBase]: For 84957/84961 co-relation queries the response was YES. [2024-06-14 12:20:15,019 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. [2024-06-14 12:20:15,035 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 157 selfloop transitions, 55 changer transitions 0/219 dead transitions. [2024-06-14 12:20:15,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 219 transitions, 2131 flow [2024-06-14 12:20:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-14 12:20:15,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-14 12:20:15,037 INFO L175 Difference]: Start difference. First operand has 104 places, 122 transitions, 1000 flow. Second operand 11 states and 219 transitions. [2024-06-14 12:20:15,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 219 transitions, 2131 flow [2024-06-14 12:20:15,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 219 transitions, 2092 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:15,099 INFO L231 Difference]: Finished difference. Result has 117 places, 164 transitions, 1618 flow [2024-06-14 12:20:15,099 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} [2024-06-14 12:20:15,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 12:20:15,099 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 164 transitions, 1618 flow [2024-06-14 12:20:15,100 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) [2024-06-14 12:20:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:15,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:20:15,100 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)] === [2024-06-14 12:20:15,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 87418296, now seen corresponding path program 3 times [2024-06-14 12:20:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928671991] [2024-06-14 12:20:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:15,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:15,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928671991] [2024-06-14 12:20:15,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928671991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:15,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:15,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098642824] [2024-06-14 12:20:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:15,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:15,918 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) [2024-06-14 12:20:15,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:15,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:15,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:16,926 INFO L124 PetriNetUnfolderBase]: 3447/5493 cut-off events. [2024-06-14 12:20:16,926 INFO L125 PetriNetUnfolderBase]: For 122006/122016 co-relation queries the response was YES. [2024-06-14 12:20:16,944 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. [2024-06-14 12:20:16,964 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 138 selfloop transitions, 89 changer transitions 0/234 dead transitions. [2024-06-14 12:20:16,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 234 transitions, 2754 flow [2024-06-14 12:20:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:20:16,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-14 12:20:16,966 INFO L175 Difference]: Start difference. First operand has 117 places, 164 transitions, 1618 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:20:16,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 234 transitions, 2754 flow [2024-06-14 12:20:17,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 234 transitions, 2713 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 12:20:17,067 INFO L231 Difference]: Finished difference. Result has 127 places, 180 transitions, 2143 flow [2024-06-14 12:20:17,067 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} [2024-06-14 12:20:17,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 12:20:17,068 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 180 transitions, 2143 flow [2024-06-14 12:20:17,068 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) [2024-06-14 12:20:17,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:17,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:17,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:20:17,069 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)] === [2024-06-14 12:20:17,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1986680076, now seen corresponding path program 4 times [2024-06-14 12:20:17,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:17,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805304352] [2024-06-14 12:20:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:17,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805304352] [2024-06-14 12:20:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805304352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:17,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:17,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386628815] [2024-06-14 12:20:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:17,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:17,906 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) [2024-06-14 12:20:17,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:17,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:17,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:19,020 INFO L124 PetriNetUnfolderBase]: 3596/5713 cut-off events. [2024-06-14 12:20:19,021 INFO L125 PetriNetUnfolderBase]: For 141897/141899 co-relation queries the response was YES. [2024-06-14 12:20:19,046 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. [2024-06-14 12:20:19,069 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 154 selfloop transitions, 86 changer transitions 0/247 dead transitions. [2024-06-14 12:20:19,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 247 transitions, 3146 flow [2024-06-14 12:20:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-14 12:20:19,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-14 12:20:19,071 INFO L175 Difference]: Start difference. First operand has 127 places, 180 transitions, 2143 flow. Second operand 11 states and 216 transitions. [2024-06-14 12:20:19,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 247 transitions, 3146 flow [2024-06-14 12:20:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 247 transitions, 3022 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:19,194 INFO L231 Difference]: Finished difference. Result has 132 places, 198 transitions, 2499 flow [2024-06-14 12:20:19,195 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} [2024-06-14 12:20:19,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 12:20:19,195 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 198 transitions, 2499 flow [2024-06-14 12:20:19,195 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) [2024-06-14 12:20:19,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:19,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:19,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:20:19,196 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)] === [2024-06-14 12:20:19,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1145413138, now seen corresponding path program 5 times [2024-06-14 12:20:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:19,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426918447] [2024-06-14 12:20:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:20,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:20,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426918447] [2024-06-14 12:20:20,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426918447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:20,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:20,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:20,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823773698] [2024-06-14 12:20:20,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:20,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:20,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:20,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:20,432 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) [2024-06-14 12:20:20,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:20,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:20,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:21,638 INFO L124 PetriNetUnfolderBase]: 3812/6080 cut-off events. [2024-06-14 12:20:21,638 INFO L125 PetriNetUnfolderBase]: For 157646/157652 co-relation queries the response was YES. [2024-06-14 12:20:21,661 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. [2024-06-14 12:20:21,685 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 61 changer transitions 0/251 dead transitions. [2024-06-14 12:20:21,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 251 transitions, 3351 flow [2024-06-14 12:20:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-14 12:20:21,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-14 12:20:21,687 INFO L175 Difference]: Start difference. First operand has 132 places, 198 transitions, 2499 flow. Second operand 11 states and 214 transitions. [2024-06-14 12:20:21,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 251 transitions, 3351 flow [2024-06-14 12:20:21,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 251 transitions, 3153 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:21,833 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 2641 flow [2024-06-14 12:20:21,833 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} [2024-06-14 12:20:21,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 12:20:21,834 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 2641 flow [2024-06-14 12:20:21,834 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) [2024-06-14 12:20:21,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:21,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:20:21,834 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)] === [2024-06-14 12:20:21,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1142616628, now seen corresponding path program 6 times [2024-06-14 12:20:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051318398] [2024-06-14 12:20:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051318398] [2024-06-14 12:20:22,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051318398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:22,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:22,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:22,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458418104] [2024-06-14 12:20:22,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:22,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:22,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:22,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:22,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:22,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:22,969 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) [2024-06-14 12:20:22,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:22,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:22,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:24,026 INFO L124 PetriNetUnfolderBase]: 3730/5949 cut-off events. [2024-06-14 12:20:24,026 INFO L125 PetriNetUnfolderBase]: For 152886/152888 co-relation queries the response was YES. [2024-06-14 12:20:24,053 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. [2024-06-14 12:20:24,078 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 46 changer transitions 0/244 dead transitions. [2024-06-14 12:20:24,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 244 transitions, 3276 flow [2024-06-14 12:20:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:20:24,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-14 12:20:24,081 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 2641 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:20:24,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 244 transitions, 3276 flow [2024-06-14 12:20:24,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 244 transitions, 3122 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:24,244 INFO L231 Difference]: Finished difference. Result has 138 places, 204 transitions, 2593 flow [2024-06-14 12:20:24,244 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} [2024-06-14 12:20:24,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 12:20:24,245 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 204 transitions, 2593 flow [2024-06-14 12:20:24,245 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) [2024-06-14 12:20:24,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:24,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:20:24,246 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)] === [2024-06-14 12:20:24,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1027325458, now seen corresponding path program 7 times [2024-06-14 12:20:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:24,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491989687] [2024-06-14 12:20:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:24,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:25,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:25,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491989687] [2024-06-14 12:20:25,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491989687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:25,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:25,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358293643] [2024-06-14 12:20:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:25,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:25,444 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) [2024-06-14 12:20:25,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:25,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:25,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:26,668 INFO L124 PetriNetUnfolderBase]: 3972/6333 cut-off events. [2024-06-14 12:20:26,668 INFO L125 PetriNetUnfolderBase]: For 153734/153742 co-relation queries the response was YES. [2024-06-14 12:20:26,695 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. [2024-06-14 12:20:26,719 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 207 selfloop transitions, 86 changer transitions 0/300 dead transitions. [2024-06-14 12:20:26,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 300 transitions, 3965 flow [2024-06-14 12:20:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 12:20:26,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-14 12:20:26,721 INFO L175 Difference]: Start difference. First operand has 138 places, 204 transitions, 2593 flow. Second operand 10 states and 204 transitions. [2024-06-14 12:20:26,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 300 transitions, 3965 flow [2024-06-14 12:20:26,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 300 transitions, 3879 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:26,914 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3195 flow [2024-06-14 12:20:26,914 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} [2024-06-14 12:20:26,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 12:20:26,915 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3195 flow [2024-06-14 12:20:26,915 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) [2024-06-14 12:20:26,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:26,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:20:26,915 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)] === [2024-06-14 12:20:26,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1490453314, now seen corresponding path program 1 times [2024-06-14 12:20:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:26,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922461886] [2024-06-14 12:20:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:26,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922461886] [2024-06-14 12:20:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922461886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:27,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647405585] [2024-06-14 12:20:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:27,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:27,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:27,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:27,968 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) [2024-06-14 12:20:27,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:27,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:29,186 INFO L124 PetriNetUnfolderBase]: 4598/7187 cut-off events. [2024-06-14 12:20:29,186 INFO L125 PetriNetUnfolderBase]: For 170910/170915 co-relation queries the response was YES. [2024-06-14 12:20:29,213 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. [2024-06-14 12:20:29,243 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 238 selfloop transitions, 54 changer transitions 0/297 dead transitions. [2024-06-14 12:20:29,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 297 transitions, 4114 flow [2024-06-14 12:20:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:20:29,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:20:29,245 INFO L175 Difference]: Start difference. First operand has 145 places, 247 transitions, 3195 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:20:29,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 297 transitions, 4114 flow [2024-06-14 12:20:29,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 297 transitions, 4073 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 12:20:29,409 INFO L231 Difference]: Finished difference. Result has 154 places, 263 transitions, 3489 flow [2024-06-14 12:20:29,409 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} [2024-06-14 12:20:29,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 12:20:29,410 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 263 transitions, 3489 flow [2024-06-14 12:20:29,410 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) [2024-06-14 12:20:29,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:29,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:29,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:20:29,410 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)] === [2024-06-14 12:20:29,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1556672819, now seen corresponding path program 1 times [2024-06-14 12:20:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:29,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806234757] [2024-06-14 12:20:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806234757] [2024-06-14 12:20:29,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806234757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:29,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913552418] [2024-06-14 12:20:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:29,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:30,000 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) [2024-06-14 12:20:30,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:30,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:30,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:31,064 INFO L124 PetriNetUnfolderBase]: 4506/7085 cut-off events. [2024-06-14 12:20:31,064 INFO L125 PetriNetUnfolderBase]: For 179803/179865 co-relation queries the response was YES. [2024-06-14 12:20:31,098 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. [2024-06-14 12:20:31,126 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 31 changer transitions 0/288 dead transitions. [2024-06-14 12:20:31,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 288 transitions, 4216 flow [2024-06-14 12:20:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:20:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:20:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:20:31,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 12:20:31,127 INFO L175 Difference]: Start difference. First operand has 154 places, 263 transitions, 3489 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:20:31,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 288 transitions, 4216 flow [2024-06-14 12:20:31,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 288 transitions, 4076 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:31,338 INFO L231 Difference]: Finished difference. Result has 156 places, 269 transitions, 3482 flow [2024-06-14 12:20:31,338 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} [2024-06-14 12:20:31,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:20:31,338 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 269 transitions, 3482 flow [2024-06-14 12:20:31,339 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) [2024-06-14 12:20:31,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:31,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:31,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:20:31,339 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)] === [2024-06-14 12:20:31,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash 668780736, now seen corresponding path program 8 times [2024-06-14 12:20:31,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:31,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686302252] [2024-06-14 12:20:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:31,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:32,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:32,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686302252] [2024-06-14 12:20:32,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686302252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:32,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:32,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:32,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379749122] [2024-06-14 12:20:32,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:32,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:32,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:32,831 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) [2024-06-14 12:20:32,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:32,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:32,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:34,220 INFO L124 PetriNetUnfolderBase]: 4376/7001 cut-off events. [2024-06-14 12:20:34,221 INFO L125 PetriNetUnfolderBase]: For 202487/202501 co-relation queries the response was YES. [2024-06-14 12:20:34,251 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. [2024-06-14 12:20:34,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 124 changer transitions 0/330 dead transitions. [2024-06-14 12:20:34,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 330 transitions, 4743 flow [2024-06-14 12:20:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 12:20:34,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 12:20:34,280 INFO L175 Difference]: Start difference. First operand has 156 places, 269 transitions, 3482 flow. Second operand 10 states and 202 transitions. [2024-06-14 12:20:34,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 330 transitions, 4743 flow [2024-06-14 12:20:34,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 330 transitions, 4696 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:34,505 INFO L231 Difference]: Finished difference. Result has 164 places, 276 transitions, 3997 flow [2024-06-14 12:20:34,505 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} [2024-06-14 12:20:34,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 12:20:34,506 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 276 transitions, 3997 flow [2024-06-14 12:20:34,507 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) [2024-06-14 12:20:34,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:34,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:20:34,507 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)] === [2024-06-14 12:20:34,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash -224086946, now seen corresponding path program 9 times [2024-06-14 12:20:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:34,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599354528] [2024-06-14 12:20:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:34,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599354528] [2024-06-14 12:20:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599354528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:35,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:35,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690478051] [2024-06-14 12:20:35,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:35,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:35,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:35,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:35,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:35,882 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) [2024-06-14 12:20:35,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:35,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:35,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:37,204 INFO L124 PetriNetUnfolderBase]: 4673/7495 cut-off events. [2024-06-14 12:20:37,204 INFO L125 PetriNetUnfolderBase]: For 240137/240143 co-relation queries the response was YES. [2024-06-14 12:20:37,246 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. [2024-06-14 12:20:37,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 100 changer transitions 0/329 dead transitions. [2024-06-14 12:20:37,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 329 transitions, 5066 flow [2024-06-14 12:20:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:20:37,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 12:20:37,280 INFO L175 Difference]: Start difference. First operand has 164 places, 276 transitions, 3997 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:20:37,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 329 transitions, 5066 flow [2024-06-14 12:20:37,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 329 transitions, 4907 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:37,588 INFO L231 Difference]: Finished difference. Result has 166 places, 281 transitions, 4250 flow [2024-06-14 12:20:37,589 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} [2024-06-14 12:20:37,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:20:37,589 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 281 transitions, 4250 flow [2024-06-14 12:20:37,590 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) [2024-06-14 12:20:37,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:37,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:20:37,590 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)] === [2024-06-14 12:20:37,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash 671637696, now seen corresponding path program 10 times [2024-06-14 12:20:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911226431] [2024-06-14 12:20:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:38,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:38,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911226431] [2024-06-14 12:20:38,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911226431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:38,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:38,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:38,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583059783] [2024-06-14 12:20:38,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:38,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:38,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:38,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:38,925 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) [2024-06-14 12:20:38,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:38,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:38,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:40,232 INFO L124 PetriNetUnfolderBase]: 4593/7364 cut-off events. [2024-06-14 12:20:40,232 INFO L125 PetriNetUnfolderBase]: For 203852/203854 co-relation queries the response was YES. [2024-06-14 12:20:40,267 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. [2024-06-14 12:20:40,298 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 244 selfloop transitions, 70 changer transitions 0/322 dead transitions. [2024-06-14 12:20:40,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 322 transitions, 5094 flow [2024-06-14 12:20:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:20:40,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 12:20:40,300 INFO L175 Difference]: Start difference. First operand has 166 places, 281 transitions, 4250 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:20:40,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 322 transitions, 5094 flow [2024-06-14 12:20:40,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 4851 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:40,617 INFO L231 Difference]: Finished difference. Result has 166 places, 281 transitions, 4172 flow [2024-06-14 12:20:40,617 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} [2024-06-14 12:20:40,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:20:40,618 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 281 transitions, 4172 flow [2024-06-14 12:20:40,618 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) [2024-06-14 12:20:40,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:40,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:20:40,619 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)] === [2024-06-14 12:20:40,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash 787113564, now seen corresponding path program 2 times [2024-06-14 12:20:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024310164] [2024-06-14 12:20:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024310164] [2024-06-14 12:20:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024310164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:41,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089315180] [2024-06-14 12:20:41,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:41,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:41,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:41,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:42,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:42,021 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) [2024-06-14 12:20:42,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:42,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:42,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:43,287 INFO L124 PetriNetUnfolderBase]: 5262/8289 cut-off events. [2024-06-14 12:20:43,287 INFO L125 PetriNetUnfolderBase]: For 200662/200667 co-relation queries the response was YES. [2024-06-14 12:20:43,332 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. [2024-06-14 12:20:43,366 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 258 selfloop transitions, 58 changer transitions 0/321 dead transitions. [2024-06-14 12:20:43,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 321 transitions, 5071 flow [2024-06-14 12:20:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:20:43,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:20:43,368 INFO L175 Difference]: Start difference. First operand has 166 places, 281 transitions, 4172 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:20:43,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 321 transitions, 5071 flow [2024-06-14 12:20:43,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 321 transitions, 4862 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:43,862 INFO L231 Difference]: Finished difference. Result has 166 places, 288 transitions, 4191 flow [2024-06-14 12:20:43,862 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} [2024-06-14 12:20:43,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 12:20:43,863 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 288 transitions, 4191 flow [2024-06-14 12:20:43,863 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) [2024-06-14 12:20:43,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:43,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:20:43,863 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)] === [2024-06-14 12:20:43,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 786928866, now seen corresponding path program 11 times [2024-06-14 12:20:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766508364] [2024-06-14 12:20:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:44,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:44,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766508364] [2024-06-14 12:20:44,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766508364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:44,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:44,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:44,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050714873] [2024-06-14 12:20:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:44,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:44,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:45,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:45,118 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) [2024-06-14 12:20:45,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:45,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:45,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:46,390 INFO L124 PetriNetUnfolderBase]: 4699/7541 cut-off events. [2024-06-14 12:20:46,390 INFO L125 PetriNetUnfolderBase]: For 190961/190973 co-relation queries the response was YES. [2024-06-14 12:20:46,428 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. [2024-06-14 12:20:46,457 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 210 selfloop transitions, 116 changer transitions 0/335 dead transitions. [2024-06-14 12:20:46,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 335 transitions, 5241 flow [2024-06-14 12:20:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:20:46,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 12:20:46,459 INFO L175 Difference]: Start difference. First operand has 166 places, 288 transitions, 4191 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:20:46,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 335 transitions, 5241 flow [2024-06-14 12:20:46,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 335 transitions, 5087 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:46,761 INFO L231 Difference]: Finished difference. Result has 170 places, 289 transitions, 4319 flow [2024-06-14 12:20:46,761 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} [2024-06-14 12:20:46,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:20:46,762 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 289 transitions, 4319 flow [2024-06-14 12:20:46,762 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) [2024-06-14 12:20:46,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:46,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:46,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:20:46,762 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)] === [2024-06-14 12:20:46,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash 7303525, now seen corresponding path program 2 times [2024-06-14 12:20:46,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:46,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243257285] [2024-06-14 12:20:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:46,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:47,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243257285] [2024-06-14 12:20:47,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243257285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:47,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:47,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:20:47,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841358556] [2024-06-14 12:20:47,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:47,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:20:47,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:47,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:20:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:20:47,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:47,632 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) [2024-06-14 12:20:47,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:47,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:47,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:48,989 INFO L124 PetriNetUnfolderBase]: 5230/8329 cut-off events. [2024-06-14 12:20:48,989 INFO L125 PetriNetUnfolderBase]: For 198470/198522 co-relation queries the response was YES. [2024-06-14 12:20:49,055 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. [2024-06-14 12:20:49,091 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 264 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-14 12:20:49,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 316 transitions, 5217 flow [2024-06-14 12:20:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:20:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:20:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:20:49,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:20:49,092 INFO L175 Difference]: Start difference. First operand has 170 places, 289 transitions, 4319 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:20:49,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 316 transitions, 5217 flow [2024-06-14 12:20:49,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 316 transitions, 4953 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:49,381 INFO L231 Difference]: Finished difference. Result has 171 places, 304 transitions, 4386 flow [2024-06-14 12:20:49,381 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} [2024-06-14 12:20:49,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 12:20:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 304 transitions, 4386 flow [2024-06-14 12:20:49,382 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) [2024-06-14 12:20:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:20:49,382 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)] === [2024-06-14 12:20:49,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1402085536, now seen corresponding path program 3 times [2024-06-14 12:20:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374390115] [2024-06-14 12:20:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:50,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374390115] [2024-06-14 12:20:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374390115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:50,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:50,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809338438] [2024-06-14 12:20:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:50,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:50,657 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) [2024-06-14 12:20:50,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:50,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:52,033 INFO L124 PetriNetUnfolderBase]: 5412/8536 cut-off events. [2024-06-14 12:20:52,033 INFO L125 PetriNetUnfolderBase]: For 194691/194691 co-relation queries the response was YES. [2024-06-14 12:20:52,082 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. [2024-06-14 12:20:52,120 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 36 changer transitions 0/340 dead transitions. [2024-06-14 12:20:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 340 transitions, 5310 flow [2024-06-14 12:20:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:20:52,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:20:52,124 INFO L175 Difference]: Start difference. First operand has 171 places, 304 transitions, 4386 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:20:52,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 340 transitions, 5310 flow [2024-06-14 12:20:52,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 340 transitions, 5257 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:52,410 INFO L231 Difference]: Finished difference. Result has 176 places, 311 transitions, 4538 flow [2024-06-14 12:20:52,410 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} [2024-06-14 12:20:52,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-14 12:20:52,411 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 311 transitions, 4538 flow [2024-06-14 12:20:52,411 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) [2024-06-14 12:20:52,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:52,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:52,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:20:52,411 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)] === [2024-06-14 12:20:52,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1240053782, now seen corresponding path program 4 times [2024-06-14 12:20:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745889697] [2024-06-14 12:20:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:53,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:53,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745889697] [2024-06-14 12:20:53,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745889697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:53,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:53,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:53,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728704004] [2024-06-14 12:20:53,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:53,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:53,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:53,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:53,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:53,534 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) [2024-06-14 12:20:53,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:53,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:53,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:54,832 INFO L124 PetriNetUnfolderBase]: 5429/8565 cut-off events. [2024-06-14 12:20:54,833 INFO L125 PetriNetUnfolderBase]: For 206537/206537 co-relation queries the response was YES. [2024-06-14 12:20:54,882 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. [2024-06-14 12:20:54,920 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 30 changer transitions 0/340 dead transitions. [2024-06-14 12:20:54,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 340 transitions, 5401 flow [2024-06-14 12:20:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:20:54,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:20:54,921 INFO L175 Difference]: Start difference. First operand has 176 places, 311 transitions, 4538 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:20:54,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 340 transitions, 5401 flow [2024-06-14 12:20:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 340 transitions, 5278 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:55,235 INFO L231 Difference]: Finished difference. Result has 179 places, 313 transitions, 4534 flow [2024-06-14 12:20:55,235 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} [2024-06-14 12:20:55,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 12:20:55,235 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 313 transitions, 4534 flow [2024-06-14 12:20:55,236 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) [2024-06-14 12:20:55,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:55,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:20:55,238 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)] === [2024-06-14 12:20:55,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1401900838, now seen corresponding path program 12 times [2024-06-14 12:20:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667589658] [2024-06-14 12:20:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:55,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:56,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667589658] [2024-06-14 12:20:56,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667589658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:56,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:56,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119122853] [2024-06-14 12:20:56,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:56,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:56,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:56,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:56,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:56,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:20:56,514 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) [2024-06-14 12:20:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:20:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:57,786 INFO L124 PetriNetUnfolderBase]: 4817/7738 cut-off events. [2024-06-14 12:20:57,786 INFO L125 PetriNetUnfolderBase]: For 208013/208013 co-relation queries the response was YES. [2024-06-14 12:20:57,831 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. [2024-06-14 12:20:57,863 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 58 changer transitions 0/355 dead transitions. [2024-06-14 12:20:57,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 355 transitions, 5604 flow [2024-06-14 12:20:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:20:57,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:20:57,864 INFO L175 Difference]: Start difference. First operand has 179 places, 313 transitions, 4534 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:20:57,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 355 transitions, 5604 flow [2024-06-14 12:20:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 355 transitions, 5511 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:20:58,213 INFO L231 Difference]: Finished difference. Result has 182 places, 314 transitions, 4602 flow [2024-06-14 12:20:58,214 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} [2024-06-14 12:20:58,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:20:58,214 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 314 transitions, 4602 flow [2024-06-14 12:20:58,214 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) [2024-06-14 12:20:58,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:58,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:20:58,215 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)] === [2024-06-14 12:20:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1638557566, now seen corresponding path program 5 times [2024-06-14 12:20:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548436657] [2024-06-14 12:20:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548436657] [2024-06-14 12:20:59,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548436657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:59,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:59,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091298171] [2024-06-14 12:20:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:59,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:20:59,296 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) [2024-06-14 12:20:59,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:59,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:20:59,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:00,662 INFO L124 PetriNetUnfolderBase]: 5450/8606 cut-off events. [2024-06-14 12:21:00,662 INFO L125 PetriNetUnfolderBase]: For 221252/221252 co-relation queries the response was YES. [2024-06-14 12:21:00,710 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. [2024-06-14 12:21:00,744 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 317 selfloop transitions, 18 changer transitions 0/340 dead transitions. [2024-06-14 12:21:00,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 340 transitions, 5442 flow [2024-06-14 12:21:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:21:00,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:21:00,747 INFO L175 Difference]: Start difference. First operand has 182 places, 314 transitions, 4602 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:21:00,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 340 transitions, 5442 flow [2024-06-14 12:21:01,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 340 transitions, 5332 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:01,243 INFO L231 Difference]: Finished difference. Result has 184 places, 316 transitions, 4589 flow [2024-06-14 12:21:01,243 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} [2024-06-14 12:21:01,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:21:01,244 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 316 transitions, 4589 flow [2024-06-14 12:21:01,244 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) [2024-06-14 12:21:01,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:01,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:01,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:21:01,244 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)] === [2024-06-14 12:21:01,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:01,245 INFO L85 PathProgramCache]: Analyzing trace with hash 66311068, now seen corresponding path program 1 times [2024-06-14 12:21:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193643982] [2024-06-14 12:21:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:01,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193643982] [2024-06-14 12:21:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193643982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:02,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:02,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876723983] [2024-06-14 12:21:02,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:02,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:02,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:02,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:02,512 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) [2024-06-14 12:21:02,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:02,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:02,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:04,008 INFO L124 PetriNetUnfolderBase]: 5463/8623 cut-off events. [2024-06-14 12:21:04,008 INFO L125 PetriNetUnfolderBase]: For 225343/225343 co-relation queries the response was YES. [2024-06-14 12:21:04,047 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. [2024-06-14 12:21:04,077 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 42 changer transitions 0/353 dead transitions. [2024-06-14 12:21:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 353 transitions, 5553 flow [2024-06-14 12:21:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:21:04,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:21:04,079 INFO L175 Difference]: Start difference. First operand has 184 places, 316 transitions, 4589 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:21:04,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 353 transitions, 5553 flow [2024-06-14 12:21:04,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 353 transitions, 5422 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:04,482 INFO L231 Difference]: Finished difference. Result has 186 places, 324 transitions, 4675 flow [2024-06-14 12:21:04,483 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} [2024-06-14 12:21:04,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:21:04,483 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 324 transitions, 4675 flow [2024-06-14 12:21:04,483 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) [2024-06-14 12:21:04,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:04,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:21:04,484 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)] === [2024-06-14 12:21:04,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:04,484 INFO L85 PathProgramCache]: Analyzing trace with hash -435600605, now seen corresponding path program 3 times [2024-06-14 12:21:04,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:04,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028771196] [2024-06-14 12:21:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028771196] [2024-06-14 12:21:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028771196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:05,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:05,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:21:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342034734] [2024-06-14 12:21:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:21:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:21:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:21:05,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:21:05,196 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) [2024-06-14 12:21:05,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:05,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:21:05,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:06,529 INFO L124 PetriNetUnfolderBase]: 5286/8418 cut-off events. [2024-06-14 12:21:06,530 INFO L125 PetriNetUnfolderBase]: For 232783/232872 co-relation queries the response was YES. [2024-06-14 12:21:06,576 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. [2024-06-14 12:21:06,609 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 293 selfloop transitions, 13 changer transitions 0/332 dead transitions. [2024-06-14 12:21:06,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 332 transitions, 5319 flow [2024-06-14 12:21:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:21:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:21:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:21:06,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:21:06,611 INFO L175 Difference]: Start difference. First operand has 186 places, 324 transitions, 4675 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:21:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 332 transitions, 5319 flow [2024-06-14 12:21:06,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 332 transitions, 5180 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:06,971 INFO L231 Difference]: Finished difference. Result has 185 places, 324 transitions, 4568 flow [2024-06-14 12:21:06,971 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} [2024-06-14 12:21:06,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 12:21:06,973 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 324 transitions, 4568 flow [2024-06-14 12:21:06,973 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) [2024-06-14 12:21:06,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:06,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:06,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:21:06,974 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)] === [2024-06-14 12:21:06,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -441308573, now seen corresponding path program 1 times [2024-06-14 12:21:06,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181262200] [2024-06-14 12:21:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:07,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:07,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181262200] [2024-06-14 12:21:07,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181262200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:07,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:07,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:21:07,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497201476] [2024-06-14 12:21:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:07,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:21:07,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:07,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:21:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:21:07,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:07,633 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) [2024-06-14 12:21:07,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:07,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:07,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:09,069 INFO L124 PetriNetUnfolderBase]: 5462/8621 cut-off events. [2024-06-14 12:21:09,069 INFO L125 PetriNetUnfolderBase]: For 240113/240113 co-relation queries the response was YES. [2024-06-14 12:21:09,110 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. [2024-06-14 12:21:09,141 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 320 selfloop transitions, 17 changer transitions 0/342 dead transitions. [2024-06-14 12:21:09,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 342 transitions, 5412 flow [2024-06-14 12:21:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:21:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:21:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:21:09,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:21:09,142 INFO L175 Difference]: Start difference. First operand has 185 places, 324 transitions, 4568 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:21:09,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 342 transitions, 5412 flow [2024-06-14 12:21:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 342 transitions, 5384 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:09,511 INFO L231 Difference]: Finished difference. Result has 186 places, 330 transitions, 4638 flow [2024-06-14 12:21:09,512 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} [2024-06-14 12:21:09,520 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:21:09,521 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 330 transitions, 4638 flow [2024-06-14 12:21:09,521 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) [2024-06-14 12:21:09,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:09,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:09,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:21:09,521 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)] === [2024-06-14 12:21:09,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 23177137, now seen corresponding path program 2 times [2024-06-14 12:21:09,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:09,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287135514] [2024-06-14 12:21:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:10,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287135514] [2024-06-14 12:21:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287135514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:21:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909267370] [2024-06-14 12:21:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:21:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:21:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:21:10,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:10,187 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) [2024-06-14 12:21:10,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:10,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:10,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:11,776 INFO L124 PetriNetUnfolderBase]: 5459/8618 cut-off events. [2024-06-14 12:21:11,776 INFO L125 PetriNetUnfolderBase]: For 251014/251017 co-relation queries the response was YES. [2024-06-14 12:21:11,830 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. [2024-06-14 12:21:11,873 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 315 selfloop transitions, 18 changer transitions 0/338 dead transitions. [2024-06-14 12:21:11,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 338 transitions, 5336 flow [2024-06-14 12:21:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:21:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:21:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:21:11,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 12:21:11,874 INFO L175 Difference]: Start difference. First operand has 186 places, 330 transitions, 4638 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:21:11,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 338 transitions, 5336 flow [2024-06-14 12:21:12,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 338 transitions, 5289 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 12:21:12,381 INFO L231 Difference]: Finished difference. Result has 191 places, 330 transitions, 4633 flow [2024-06-14 12:21:12,381 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} [2024-06-14 12:21:12,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:21:12,382 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 330 transitions, 4633 flow [2024-06-14 12:21:12,382 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) [2024-06-14 12:21:12,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:12,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:21:12,383 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)] === [2024-06-14 12:21:12,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:12,383 INFO L85 PathProgramCache]: Analyzing trace with hash 7703363, now seen corresponding path program 1 times [2024-06-14 12:21:12,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:12,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529373131] [2024-06-14 12:21:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:12,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529373131] [2024-06-14 12:21:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529373131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:13,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832709741] [2024-06-14 12:21:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:13,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:13,212 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) [2024-06-14 12:21:13,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:14,746 INFO L124 PetriNetUnfolderBase]: 5397/8535 cut-off events. [2024-06-14 12:21:14,747 INFO L125 PetriNetUnfolderBase]: For 259048/259137 co-relation queries the response was YES. [2024-06-14 12:21:14,789 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. [2024-06-14 12:21:14,822 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 305 selfloop transitions, 15 changer transitions 0/344 dead transitions. [2024-06-14 12:21:14,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 344 transitions, 5343 flow [2024-06-14 12:21:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:21:14,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:21:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:21:14,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:21:14,823 INFO L175 Difference]: Start difference. First operand has 191 places, 330 transitions, 4633 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:21:14,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 344 transitions, 5343 flow [2024-06-14 12:21:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 344 transitions, 5295 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:15,254 INFO L231 Difference]: Finished difference. Result has 191 places, 333 transitions, 4659 flow [2024-06-14 12:21:15,255 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} [2024-06-14 12:21:15,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:21:15,255 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 333 transitions, 4659 flow [2024-06-14 12:21:15,255 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) [2024-06-14 12:21:15,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:15,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:15,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:21:15,256 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)] === [2024-06-14 12:21:15,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash 947369162, now seen corresponding path program 1 times [2024-06-14 12:21:15,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:15,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130745605] [2024-06-14 12:21:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:16,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130745605] [2024-06-14 12:21:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130745605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:16,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:16,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196146532] [2024-06-14 12:21:16,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:16,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:16,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:16,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:16,489 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) [2024-06-14 12:21:16,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:16,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:16,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:18,135 INFO L124 PetriNetUnfolderBase]: 5504/8678 cut-off events. [2024-06-14 12:21:18,135 INFO L125 PetriNetUnfolderBase]: For 269155/269159 co-relation queries the response was YES. [2024-06-14 12:21:18,177 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. [2024-06-14 12:21:18,209 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 321 selfloop transitions, 52 changer transitions 0/378 dead transitions. [2024-06-14 12:21:18,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 378 transitions, 5757 flow [2024-06-14 12:21:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:21:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:21:18,211 INFO L175 Difference]: Start difference. First operand has 191 places, 333 transitions, 4659 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:21:18,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 378 transitions, 5757 flow [2024-06-14 12:21:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 378 transitions, 5705 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:18,594 INFO L231 Difference]: Finished difference. Result has 197 places, 343 transitions, 4956 flow [2024-06-14 12:21:18,594 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} [2024-06-14 12:21:18,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 12:21:18,594 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 343 transitions, 4956 flow [2024-06-14 12:21:18,595 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) [2024-06-14 12:21:18,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:18,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:21:18,595 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)] === [2024-06-14 12:21:18,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1776599074, now seen corresponding path program 2 times [2024-06-14 12:21:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:18,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995199351] [2024-06-14 12:21:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:19,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995199351] [2024-06-14 12:21:19,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995199351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:19,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:19,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134353482] [2024-06-14 12:21:19,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:19,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:19,739 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) [2024-06-14 12:21:19,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:19,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:19,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:21,488 INFO L124 PetriNetUnfolderBase]: 5564/8767 cut-off events. [2024-06-14 12:21:21,488 INFO L125 PetriNetUnfolderBase]: For 280738/280750 co-relation queries the response was YES. [2024-06-14 12:21:21,536 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. [2024-06-14 12:21:21,568 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 260 selfloop transitions, 144 changer transitions 0/409 dead transitions. [2024-06-14 12:21:21,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 409 transitions, 6260 flow [2024-06-14 12:21:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:21:21,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-14 12:21:21,569 INFO L175 Difference]: Start difference. First operand has 197 places, 343 transitions, 4956 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:21:21,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 409 transitions, 6260 flow [2024-06-14 12:21:22,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 409 transitions, 6052 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:22,174 INFO L231 Difference]: Finished difference. Result has 202 places, 366 transitions, 5390 flow [2024-06-14 12:21:22,174 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} [2024-06-14 12:21:22,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 12:21:22,174 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 366 transitions, 5390 flow [2024-06-14 12:21:22,175 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) [2024-06-14 12:21:22,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:22,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:22,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:21:22,176 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)] === [2024-06-14 12:21:22,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash -958153032, now seen corresponding path program 3 times [2024-06-14 12:21:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:22,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685483625] [2024-06-14 12:21:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:22,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:23,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:23,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685483625] [2024-06-14 12:21:23,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685483625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:23,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:23,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:23,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142629411] [2024-06-14 12:21:23,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:23,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:23,515 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) [2024-06-14 12:21:23,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:23,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:25,321 INFO L124 PetriNetUnfolderBase]: 5606/8835 cut-off events. [2024-06-14 12:21:25,321 INFO L125 PetriNetUnfolderBase]: For 300884/300896 co-relation queries the response was YES. [2024-06-14 12:21:25,372 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. [2024-06-14 12:21:25,411 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 257 selfloop transitions, 156 changer transitions 0/418 dead transitions. [2024-06-14 12:21:25,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 418 transitions, 6781 flow [2024-06-14 12:21:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:21:25,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-14 12:21:25,414 INFO L175 Difference]: Start difference. First operand has 202 places, 366 transitions, 5390 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:21:25,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 418 transitions, 6781 flow [2024-06-14 12:21:26,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 418 transitions, 6559 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 12:21:26,015 INFO L231 Difference]: Finished difference. Result has 210 places, 372 transitions, 5709 flow [2024-06-14 12:21:26,015 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} [2024-06-14 12:21:26,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 12:21:26,016 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 372 transitions, 5709 flow [2024-06-14 12:21:26,016 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) [2024-06-14 12:21:26,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:26,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:26,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:21:26,017 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)] === [2024-06-14 12:21:26,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1782163264, now seen corresponding path program 4 times [2024-06-14 12:21:26,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:26,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112772315] [2024-06-14 12:21:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:27,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112772315] [2024-06-14 12:21:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112772315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:27,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:27,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334542361] [2024-06-14 12:21:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:27,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:27,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:27,240 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) [2024-06-14 12:21:27,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:27,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:27,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:29,172 INFO L124 PetriNetUnfolderBase]: 5598/8818 cut-off events. [2024-06-14 12:21:29,172 INFO L125 PetriNetUnfolderBase]: For 310004/310016 co-relation queries the response was YES. [2024-06-14 12:21:29,215 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. [2024-06-14 12:21:29,246 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 269 selfloop transitions, 143 changer transitions 0/417 dead transitions. [2024-06-14 12:21:29,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 417 transitions, 6793 flow [2024-06-14 12:21:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:21:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:21:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:21:29,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-14 12:21:29,247 INFO L175 Difference]: Start difference. First operand has 210 places, 372 transitions, 5709 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:21:29,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 417 transitions, 6793 flow [2024-06-14 12:21:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 417 transitions, 6477 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:29,771 INFO L231 Difference]: Finished difference. Result has 215 places, 374 transitions, 5728 flow [2024-06-14 12:21:29,772 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} [2024-06-14 12:21:29,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 12:21:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 374 transitions, 5728 flow [2024-06-14 12:21:29,772 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) [2024-06-14 12:21:29,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:29,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:21:29,773 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)] === [2024-06-14 12:21:29,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:29,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964403, now seen corresponding path program 1 times [2024-06-14 12:21:29,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:29,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325251371] [2024-06-14 12:21:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:30,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:30,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325251371] [2024-06-14 12:21:30,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325251371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:30,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:30,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:30,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421037423] [2024-06-14 12:21:30,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:30,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:30,538 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) [2024-06-14 12:21:30,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:30,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:30,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:32,105 INFO L124 PetriNetUnfolderBase]: 5535/8737 cut-off events. [2024-06-14 12:21:32,105 INFO L125 PetriNetUnfolderBase]: For 319585/319671 co-relation queries the response was YES. [2024-06-14 12:21:32,172 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. [2024-06-14 12:21:32,208 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 324 selfloop transitions, 52 changer transitions 0/400 dead transitions. [2024-06-14 12:21:32,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 400 transitions, 6719 flow [2024-06-14 12:21:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:21:32,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:21:32,209 INFO L175 Difference]: Start difference. First operand has 215 places, 374 transitions, 5728 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:21:32,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 400 transitions, 6719 flow [2024-06-14 12:21:32,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 400 transitions, 6420 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:32,756 INFO L231 Difference]: Finished difference. Result has 216 places, 380 transitions, 5626 flow [2024-06-14 12:21:32,756 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} [2024-06-14 12:21:32,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 12:21:32,757 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 380 transitions, 5626 flow [2024-06-14 12:21:32,757 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) [2024-06-14 12:21:32,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:32,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:32,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:21:32,758 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)] === [2024-06-14 12:21:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 870616762, now seen corresponding path program 5 times [2024-06-14 12:21:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185551499] [2024-06-14 12:21:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:33,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:33,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185551499] [2024-06-14 12:21:33,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185551499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:33,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:33,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:33,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323748968] [2024-06-14 12:21:33,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:33,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:33,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:33,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:34,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:34,099 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) [2024-06-14 12:21:34,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:34,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:34,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:35,745 INFO L124 PetriNetUnfolderBase]: 5602/8824 cut-off events. [2024-06-14 12:21:35,746 INFO L125 PetriNetUnfolderBase]: For 326245/326249 co-relation queries the response was YES. [2024-06-14 12:21:35,811 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. [2024-06-14 12:21:35,849 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 341 selfloop transitions, 78 changer transitions 0/426 dead transitions. [2024-06-14 12:21:35,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 426 transitions, 6851 flow [2024-06-14 12:21:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:21:35,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:21:35,851 INFO L175 Difference]: Start difference. First operand has 216 places, 380 transitions, 5626 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:21:35,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 426 transitions, 6851 flow [2024-06-14 12:21:36,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 426 transitions, 6769 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:36,455 INFO L231 Difference]: Finished difference. Result has 222 places, 389 transitions, 5947 flow [2024-06-14 12:21:36,455 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} [2024-06-14 12:21:36,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 12:21:36,455 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 389 transitions, 5947 flow [2024-06-14 12:21:36,456 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) [2024-06-14 12:21:36,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:36,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:36,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:21:36,456 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)] === [2024-06-14 12:21:36,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1009144912, now seen corresponding path program 6 times [2024-06-14 12:21:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:36,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362908227] [2024-06-14 12:21:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:37,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:37,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362908227] [2024-06-14 12:21:37,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362908227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:37,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:37,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549657306] [2024-06-14 12:21:37,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:37,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:37,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:37,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:37,934 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) [2024-06-14 12:21:37,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:37,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:39,514 INFO L124 PetriNetUnfolderBase]: 5662/8916 cut-off events. [2024-06-14 12:21:39,515 INFO L125 PetriNetUnfolderBase]: For 341684/341696 co-relation queries the response was YES. [2024-06-14 12:21:39,600 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. [2024-06-14 12:21:39,644 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 284 selfloop transitions, 157 changer transitions 0/448 dead transitions. [2024-06-14 12:21:39,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 448 transitions, 7327 flow [2024-06-14 12:21:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:21:39,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:21:39,646 INFO L175 Difference]: Start difference. First operand has 222 places, 389 transitions, 5947 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:21:39,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 448 transitions, 7327 flow [2024-06-14 12:21:40,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 448 transitions, 7082 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:40,263 INFO L231 Difference]: Finished difference. Result has 225 places, 403 transitions, 6253 flow [2024-06-14 12:21:40,264 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} [2024-06-14 12:21:40,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 12:21:40,264 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 403 transitions, 6253 flow [2024-06-14 12:21:40,264 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) [2024-06-14 12:21:40,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:40,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:21:40,265 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)] === [2024-06-14 12:21:40,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2104666534, now seen corresponding path program 7 times [2024-06-14 12:21:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:40,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608464216] [2024-06-14 12:21:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608464216] [2024-06-14 12:21:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608464216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:41,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:41,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288332301] [2024-06-14 12:21:41,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:41,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:41,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:41,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:41,671 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) [2024-06-14 12:21:41,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:41,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:41,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:43,284 INFO L124 PetriNetUnfolderBase]: 5679/8937 cut-off events. [2024-06-14 12:21:43,284 INFO L125 PetriNetUnfolderBase]: For 357338/357350 co-relation queries the response was YES. [2024-06-14 12:21:43,352 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. [2024-06-14 12:21:43,391 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 286 selfloop transitions, 163 changer transitions 0/456 dead transitions. [2024-06-14 12:21:43,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 456 transitions, 7625 flow [2024-06-14 12:21:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:21:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:21:43,393 INFO L175 Difference]: Start difference. First operand has 225 places, 403 transitions, 6253 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:21:43,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 456 transitions, 7625 flow [2024-06-14 12:21:44,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 456 transitions, 7242 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:44,075 INFO L231 Difference]: Finished difference. Result has 227 places, 409 transitions, 6340 flow [2024-06-14 12:21:44,075 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} [2024-06-14 12:21:44,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-14 12:21:44,076 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 409 transitions, 6340 flow [2024-06-14 12:21:44,076 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) [2024-06-14 12:21:44,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:44,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:44,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:21:44,076 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)] === [2024-06-14 12:21:44,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2104673974, now seen corresponding path program 8 times [2024-06-14 12:21:44,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:44,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750801381] [2024-06-14 12:21:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:44,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:45,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750801381] [2024-06-14 12:21:45,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750801381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:45,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:45,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:45,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141318983] [2024-06-14 12:21:45,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:45,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:45,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:45,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:45,310 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) [2024-06-14 12:21:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:45,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:46,870 INFO L124 PetriNetUnfolderBase]: 5696/8969 cut-off events. [2024-06-14 12:21:46,871 INFO L125 PetriNetUnfolderBase]: For 359616/359628 co-relation queries the response was YES. [2024-06-14 12:21:46,938 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. [2024-06-14 12:21:46,974 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 265 selfloop transitions, 184 changer transitions 0/456 dead transitions. [2024-06-14 12:21:46,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 456 transitions, 7623 flow [2024-06-14 12:21:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:21:46,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:21:46,976 INFO L175 Difference]: Start difference. First operand has 227 places, 409 transitions, 6340 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:21:46,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 456 transitions, 7623 flow [2024-06-14 12:21:47,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 456 transitions, 7299 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:47,599 INFO L231 Difference]: Finished difference. Result has 231 places, 411 transitions, 6472 flow [2024-06-14 12:21:47,599 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} [2024-06-14 12:21:47,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:21:47,599 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 411 transitions, 6472 flow [2024-06-14 12:21:47,600 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) [2024-06-14 12:21:47,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:47,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:47,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:21:47,600 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)] === [2024-06-14 12:21:47,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash -972978381, now seen corresponding path program 2 times [2024-06-14 12:21:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664221747] [2024-06-14 12:21:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:48,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664221747] [2024-06-14 12:21:48,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664221747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:48,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:48,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:48,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283736918] [2024-06-14 12:21:48,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:48,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:48,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:48,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:48,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:48,611 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) [2024-06-14 12:21:48,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:48,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:48,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:50,261 INFO L124 PetriNetUnfolderBase]: 5603/8845 cut-off events. [2024-06-14 12:21:50,261 INFO L125 PetriNetUnfolderBase]: For 378071/378183 co-relation queries the response was YES. [2024-06-14 12:21:50,320 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. [2024-06-14 12:21:50,358 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 365 selfloop transitions, 41 changer transitions 0/430 dead transitions. [2024-06-14 12:21:50,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 430 transitions, 7475 flow [2024-06-14 12:21:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:21:50,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:21:50,360 INFO L175 Difference]: Start difference. First operand has 231 places, 411 transitions, 6472 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:21:50,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 430 transitions, 7475 flow [2024-06-14 12:21:50,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 430 transitions, 7038 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:50,962 INFO L231 Difference]: Finished difference. Result has 231 places, 417 transitions, 6194 flow [2024-06-14 12:21:50,962 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} [2024-06-14 12:21:50,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:21:50,963 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 417 transitions, 6194 flow [2024-06-14 12:21:50,963 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) [2024-06-14 12:21:50,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:50,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:21:50,964 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)] === [2024-06-14 12:21:50,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 514770260, now seen corresponding path program 9 times [2024-06-14 12:21:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:50,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588512851] [2024-06-14 12:21:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:52,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:52,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588512851] [2024-06-14 12:21:52,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588512851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:52,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:52,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115454412] [2024-06-14 12:21:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:52,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:52,164 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) [2024-06-14 12:21:52,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:52,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:52,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:53,862 INFO L124 PetriNetUnfolderBase]: 5776/9097 cut-off events. [2024-06-14 12:21:53,862 INFO L125 PetriNetUnfolderBase]: For 370641/370641 co-relation queries the response was YES. [2024-06-14 12:21:53,915 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. [2024-06-14 12:21:53,950 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 70 changer transitions 0/475 dead transitions. [2024-06-14 12:21:53,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 475 transitions, 7712 flow [2024-06-14 12:21:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:21:53,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:21:53,952 INFO L175 Difference]: Start difference. First operand has 231 places, 417 transitions, 6194 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:21:53,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 475 transitions, 7712 flow [2024-06-14 12:21:54,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 475 transitions, 7627 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:54,570 INFO L231 Difference]: Finished difference. Result has 236 places, 435 transitions, 6599 flow [2024-06-14 12:21:54,570 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} [2024-06-14 12:21:54,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 12:21:54,570 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 435 transitions, 6599 flow [2024-06-14 12:21:54,571 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) [2024-06-14 12:21:54,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:54,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:54,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:21:54,571 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)] === [2024-06-14 12:21:54,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1854562400, now seen corresponding path program 10 times [2024-06-14 12:21:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:54,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454990281] [2024-06-14 12:21:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:54,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:55,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454990281] [2024-06-14 12:21:55,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454990281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:55,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:55,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:55,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287849117] [2024-06-14 12:21:55,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:55,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:55,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:55,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:56,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:56,003 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) [2024-06-14 12:21:56,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:56,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:56,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:57,958 INFO L124 PetriNetUnfolderBase]: 5818/9163 cut-off events. [2024-06-14 12:21:57,958 INFO L125 PetriNetUnfolderBase]: For 395294/395294 co-relation queries the response was YES. [2024-06-14 12:21:58,019 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. [2024-06-14 12:21:58,064 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 74 changer transitions 0/479 dead transitions. [2024-06-14 12:21:58,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 479 transitions, 8115 flow [2024-06-14 12:21:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:21:58,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:21:58,066 INFO L175 Difference]: Start difference. First operand has 236 places, 435 transitions, 6599 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:21:58,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 479 transitions, 8115 flow [2024-06-14 12:21:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 479 transitions, 7913 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:58,762 INFO L231 Difference]: Finished difference. Result has 241 places, 439 transitions, 6720 flow [2024-06-14 12:21:58,762 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} [2024-06-14 12:21:58,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 12:21:58,763 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 439 transitions, 6720 flow [2024-06-14 12:21:58,763 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) [2024-06-14 12:21:58,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:58,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:21:58,764 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)] === [2024-06-14 12:21:58,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash 509407880, now seen corresponding path program 11 times [2024-06-14 12:21:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:58,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719643039] [2024-06-14 12:21:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:59,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719643039] [2024-06-14 12:21:59,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719643039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:59,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:59,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523751740] [2024-06-14 12:21:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:59,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:21:59,995 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) [2024-06-14 12:21:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:21:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:01,665 INFO L124 PetriNetUnfolderBase]: 5810/9152 cut-off events. [2024-06-14 12:22:01,665 INFO L125 PetriNetUnfolderBase]: For 402950/402950 co-relation queries the response was YES. [2024-06-14 12:22:01,751 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. [2024-06-14 12:22:01,795 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 393 selfloop transitions, 73 changer transitions 0/475 dead transitions. [2024-06-14 12:22:01,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 475 transitions, 7873 flow [2024-06-14 12:22:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:22:01,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:22:01,797 INFO L175 Difference]: Start difference. First operand has 241 places, 439 transitions, 6720 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:22:01,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 475 transitions, 7873 flow [2024-06-14 12:22:02,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 475 transitions, 7651 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:02,655 INFO L231 Difference]: Finished difference. Result has 245 places, 439 transitions, 6653 flow [2024-06-14 12:22:02,656 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} [2024-06-14 12:22:02,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 12:22:02,656 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 439 transitions, 6653 flow [2024-06-14 12:22:02,656 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) [2024-06-14 12:22:02,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:02,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:02,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:22:02,657 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)] === [2024-06-14 12:22:02,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:02,657 INFO L85 PathProgramCache]: Analyzing trace with hash -753526362, now seen corresponding path program 12 times [2024-06-14 12:22:02,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:02,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007787986] [2024-06-14 12:22:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007787986] [2024-06-14 12:22:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007787986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:03,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:22:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934232033] [2024-06-14 12:22:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:03,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:22:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:22:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:22:03,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:03,995 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) [2024-06-14 12:22:03,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:05,808 INFO L124 PetriNetUnfolderBase]: 5827/9180 cut-off events. [2024-06-14 12:22:05,808 INFO L125 PetriNetUnfolderBase]: For 414110/414110 co-relation queries the response was YES. [2024-06-14 12:22:05,882 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. [2024-06-14 12:22:05,924 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 47 changer transitions 0/475 dead transitions. [2024-06-14 12:22:05,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 475 transitions, 7877 flow [2024-06-14 12:22:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:22:05,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:22:05,925 INFO L175 Difference]: Start difference. First operand has 245 places, 439 transitions, 6653 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:22:05,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 475 transitions, 7877 flow [2024-06-14 12:22:06,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 475 transitions, 7677 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 12:22:06,732 INFO L231 Difference]: Finished difference. Result has 245 places, 441 transitions, 6648 flow [2024-06-14 12:22:06,733 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} [2024-06-14 12:22:06,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 12:22:06,733 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 441 transitions, 6648 flow [2024-06-14 12:22:06,733 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) [2024-06-14 12:22:06,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:06,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:22:06,734 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)] === [2024-06-14 12:22:06,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash -213037568, now seen corresponding path program 13 times [2024-06-14 12:22:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059273910] [2024-06-14 12:22:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:07,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:07,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059273910] [2024-06-14 12:22:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059273910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:07,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:07,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:22:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219852583] [2024-06-14 12:22:07,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:07,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:22:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:22:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:22:07,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:07,952 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) [2024-06-14 12:22:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:09,747 INFO L124 PetriNetUnfolderBase]: 5844/9208 cut-off events. [2024-06-14 12:22:09,747 INFO L125 PetriNetUnfolderBase]: For 430790/430790 co-relation queries the response was YES. [2024-06-14 12:22:09,823 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. [2024-06-14 12:22:09,867 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 48 changer transitions 0/476 dead transitions. [2024-06-14 12:22:09,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 476 transitions, 7869 flow [2024-06-14 12:22:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:22:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:22:09,869 INFO L175 Difference]: Start difference. First operand has 245 places, 441 transitions, 6648 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:22:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 476 transitions, 7869 flow [2024-06-14 12:22:10,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 476 transitions, 7700 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:10,861 INFO L231 Difference]: Finished difference. Result has 247 places, 443 transitions, 6676 flow [2024-06-14 12:22:10,861 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} [2024-06-14 12:22:10,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 12:22:10,862 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 443 transitions, 6676 flow [2024-06-14 12:22:10,862 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) [2024-06-14 12:22:10,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:10,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:10,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:22:10,862 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)] === [2024-06-14 12:22:10,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash -203840798, now seen corresponding path program 14 times [2024-06-14 12:22:10,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:10,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830878831] [2024-06-14 12:22:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:10,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:11,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830878831] [2024-06-14 12:22:11,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830878831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:11,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:11,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:22:11,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425934897] [2024-06-14 12:22:11,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:22:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:22:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:22:12,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:12,019 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) [2024-06-14 12:22:12,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:12,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:12,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:13,804 INFO L124 PetriNetUnfolderBase]: 5836/9186 cut-off events. [2024-06-14 12:22:13,805 INFO L125 PetriNetUnfolderBase]: For 439228/439228 co-relation queries the response was YES. [2024-06-14 12:22:13,881 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. [2024-06-14 12:22:13,923 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 445 selfloop transitions, 20 changer transitions 0/474 dead transitions. [2024-06-14 12:22:13,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 474 transitions, 7844 flow [2024-06-14 12:22:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:22:13,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:22:13,924 INFO L175 Difference]: Start difference. First operand has 247 places, 443 transitions, 6676 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:22:13,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 474 transitions, 7844 flow [2024-06-14 12:22:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 474 transitions, 7665 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:14,729 INFO L231 Difference]: Finished difference. Result has 249 places, 445 transitions, 6642 flow [2024-06-14 12:22:14,730 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} [2024-06-14 12:22:14,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:22:14,730 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 445 transitions, 6642 flow [2024-06-14 12:22:14,730 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) [2024-06-14 12:22:14,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:14,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:14,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:22:14,731 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)] === [2024-06-14 12:22:14,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash -618715341, now seen corresponding path program 3 times [2024-06-14 12:22:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:14,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066014552] [2024-06-14 12:22:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:15,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066014552] [2024-06-14 12:22:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066014552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548245734] [2024-06-14 12:22:15,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:15,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:15,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:15,587 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) [2024-06-14 12:22:15,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:15,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:15,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:17,323 INFO L124 PetriNetUnfolderBase]: 5688/8985 cut-off events. [2024-06-14 12:22:17,323 INFO L125 PetriNetUnfolderBase]: For 459530/459646 co-relation queries the response was YES. [2024-06-14 12:22:17,379 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. [2024-06-14 12:22:17,413 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 414 selfloop transitions, 20 changer transitions 0/458 dead transitions. [2024-06-14 12:22:17,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 458 transitions, 7691 flow [2024-06-14 12:22:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:22:17,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:22:17,414 INFO L175 Difference]: Start difference. First operand has 249 places, 445 transitions, 6642 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:22:17,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 458 transitions, 7691 flow [2024-06-14 12:22:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 458 transitions, 7564 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:18,153 INFO L231 Difference]: Finished difference. Result has 249 places, 448 transitions, 6608 flow [2024-06-14 12:22:18,153 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} [2024-06-14 12:22:18,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:22:18,154 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 448 transitions, 6608 flow [2024-06-14 12:22:18,154 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) [2024-06-14 12:22:18,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:18,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:22:18,155 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)] === [2024-06-14 12:22:18,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -618299631, now seen corresponding path program 4 times [2024-06-14 12:22:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:18,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015306978] [2024-06-14 12:22:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:18,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:18,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015306978] [2024-06-14 12:22:18,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015306978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:18,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:18,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15950876] [2024-06-14 12:22:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:19,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:19,037 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) [2024-06-14 12:22:19,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:19,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:19,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:20,659 INFO L124 PetriNetUnfolderBase]: 5682/8977 cut-off events. [2024-06-14 12:22:20,659 INFO L125 PetriNetUnfolderBase]: For 467510/467620 co-relation queries the response was YES. [2024-06-14 12:22:20,726 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. [2024-06-14 12:22:20,765 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 418 selfloop transitions, 15 changer transitions 0/457 dead transitions. [2024-06-14 12:22:20,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 457 transitions, 7508 flow [2024-06-14 12:22:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:22:20,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:22:20,766 INFO L175 Difference]: Start difference. First operand has 249 places, 448 transitions, 6608 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:22:20,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 457 transitions, 7508 flow [2024-06-14 12:22:21,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 457 transitions, 7396 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:21,589 INFO L231 Difference]: Finished difference. Result has 251 places, 448 transitions, 6532 flow [2024-06-14 12:22:21,589 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} [2024-06-14 12:22:21,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 12:22:21,590 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 448 transitions, 6532 flow [2024-06-14 12:22:21,590 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) [2024-06-14 12:22:21,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:21,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:22:21,590 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)] === [2024-06-14 12:22:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -795782505, now seen corresponding path program 1 times [2024-06-14 12:22:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:21,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671403410] [2024-06-14 12:22:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:22,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671403410] [2024-06-14 12:22:22,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671403410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:22,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:22,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:22,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897954188] [2024-06-14 12:22:22,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:22,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:22,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:22,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:22,418 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) [2024-06-14 12:22:22,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:22,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:22,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:24,185 INFO L124 PetriNetUnfolderBase]: 5848/9213 cut-off events. [2024-06-14 12:22:24,185 INFO L125 PetriNetUnfolderBase]: For 470836/470836 co-relation queries the response was YES. [2024-06-14 12:22:24,261 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. [2024-06-14 12:22:24,301 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 440 selfloop transitions, 17 changer transitions 0/467 dead transitions. [2024-06-14 12:22:24,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 467 transitions, 7566 flow [2024-06-14 12:22:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:22:24,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:22:24,303 INFO L175 Difference]: Start difference. First operand has 251 places, 448 transitions, 6532 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:22:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 467 transitions, 7566 flow [2024-06-14 12:22:25,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 467 transitions, 7520 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:25,230 INFO L231 Difference]: Finished difference. Result has 252 places, 451 transitions, 6573 flow [2024-06-14 12:22:25,231 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} [2024-06-14 12:22:25,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:22:25,232 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 451 transitions, 6573 flow [2024-06-14 12:22:25,232 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) [2024-06-14 12:22:25,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:25,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:25,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:22:25,233 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)] === [2024-06-14 12:22:25,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash -647236129, now seen corresponding path program 2 times [2024-06-14 12:22:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:25,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295291633] [2024-06-14 12:22:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:25,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295291633] [2024-06-14 12:22:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295291633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:25,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906730699] [2024-06-14 12:22:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:25,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:25,976 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) [2024-06-14 12:22:25,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:25,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:25,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:27,790 INFO L124 PetriNetUnfolderBase]: 5858/9235 cut-off events. [2024-06-14 12:22:27,790 INFO L125 PetriNetUnfolderBase]: For 475555/475555 co-relation queries the response was YES. [2024-06-14 12:22:27,865 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. [2024-06-14 12:22:27,907 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 434 selfloop transitions, 29 changer transitions 0/473 dead transitions. [2024-06-14 12:22:27,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 473 transitions, 7767 flow [2024-06-14 12:22:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:22:27,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:22:27,909 INFO L175 Difference]: Start difference. First operand has 252 places, 451 transitions, 6573 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:22:27,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 473 transitions, 7767 flow [2024-06-14 12:22:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 473 transitions, 7697 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:28,705 INFO L231 Difference]: Finished difference. Result has 253 places, 457 transitions, 6665 flow [2024-06-14 12:22:28,705 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} [2024-06-14 12:22:28,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 12:22:28,706 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 457 transitions, 6665 flow [2024-06-14 12:22:28,706 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) [2024-06-14 12:22:28,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:28,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:22:28,707 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)] === [2024-06-14 12:22:28,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -795662349, now seen corresponding path program 1 times [2024-06-14 12:22:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522770230] [2024-06-14 12:22:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:28,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:29,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522770230] [2024-06-14 12:22:29,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522770230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:29,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770246915] [2024-06-14 12:22:29,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:29,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:22:29,423 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) [2024-06-14 12:22:29,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:29,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:22:29,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:31,459 INFO L124 PetriNetUnfolderBase]: 5985/9364 cut-off events. [2024-06-14 12:22:31,460 INFO L125 PetriNetUnfolderBase]: For 490971/490971 co-relation queries the response was YES. [2024-06-14 12:22:31,516 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. [2024-06-14 12:22:31,552 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 449 selfloop transitions, 24 changer transitions 0/476 dead transitions. [2024-06-14 12:22:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 476 transitions, 7851 flow [2024-06-14 12:22:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:22:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:22:31,553 INFO L175 Difference]: Start difference. First operand has 253 places, 457 transitions, 6665 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:22:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 476 transitions, 7851 flow [2024-06-14 12:22:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 476 transitions, 7789 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:32,310 INFO L231 Difference]: Finished difference. Result has 257 places, 463 transitions, 6743 flow [2024-06-14 12:22:32,310 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} [2024-06-14 12:22:32,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 12:22:32,311 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 463 transitions, 6743 flow [2024-06-14 12:22:32,311 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) [2024-06-14 12:22:32,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:32,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:22:32,311 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)] === [2024-06-14 12:22:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash 718499283, now seen corresponding path program 2 times [2024-06-14 12:22:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:32,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482530658] [2024-06-14 12:22:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:33,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:33,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482530658] [2024-06-14 12:22:33,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482530658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:33,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:33,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574746247] [2024-06-14 12:22:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:33,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:33,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:22:33,227 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) [2024-06-14 12:22:33,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:33,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:22:33,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:35,058 INFO L124 PetriNetUnfolderBase]: 5990/9372 cut-off events. [2024-06-14 12:22:35,058 INFO L125 PetriNetUnfolderBase]: For 508470/508473 co-relation queries the response was YES. [2024-06-14 12:22:35,133 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. [2024-06-14 12:22:35,175 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 29 changer transitions 0/476 dead transitions. [2024-06-14 12:22:35,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 476 transitions, 7877 flow [2024-06-14 12:22:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:22:35,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-14 12:22:35,176 INFO L175 Difference]: Start difference. First operand has 257 places, 463 transitions, 6743 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:22:35,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 476 transitions, 7877 flow [2024-06-14 12:22:36,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 476 transitions, 7804 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:36,289 INFO L231 Difference]: Finished difference. Result has 262 places, 466 transitions, 6780 flow [2024-06-14 12:22:36,289 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} [2024-06-14 12:22:36,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 12:22:36,290 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 466 transitions, 6780 flow [2024-06-14 12:22:36,290 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) [2024-06-14 12:22:36,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:36,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:36,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:22:36,290 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)] === [2024-06-14 12:22:36,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash 238559577, now seen corresponding path program 3 times [2024-06-14 12:22:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:36,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851936710] [2024-06-14 12:22:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:37,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851936710] [2024-06-14 12:22:37,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851936710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:37,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:37,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:37,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936284032] [2024-06-14 12:22:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:37,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:37,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:37,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:37,104 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) [2024-06-14 12:22:37,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:37,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:37,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:38,891 INFO L124 PetriNetUnfolderBase]: 5874/9254 cut-off events. [2024-06-14 12:22:38,891 INFO L125 PetriNetUnfolderBase]: For 522567/522570 co-relation queries the response was YES. [2024-06-14 12:22:38,966 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. [2024-06-14 12:22:39,004 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 435 selfloop transitions, 29 changer transitions 0/477 dead transitions. [2024-06-14 12:22:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 477 transitions, 7754 flow [2024-06-14 12:22:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:22:39,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:22:39,005 INFO L175 Difference]: Start difference. First operand has 262 places, 466 transitions, 6780 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:22:39,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 477 transitions, 7754 flow [2024-06-14 12:22:40,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 477 transitions, 7662 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:40,080 INFO L231 Difference]: Finished difference. Result has 264 places, 466 transitions, 6752 flow [2024-06-14 12:22:40,081 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} [2024-06-14 12:22:40,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:22:40,081 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 466 transitions, 6752 flow [2024-06-14 12:22:40,081 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) [2024-06-14 12:22:40,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:40,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:40,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:22:40,082 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)] === [2024-06-14 12:22:40,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 238559763, now seen corresponding path program 3 times [2024-06-14 12:22:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:40,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068508134] [2024-06-14 12:22:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:40,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:40,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:40,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068508134] [2024-06-14 12:22:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068508134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:40,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104335429] [2024-06-14 12:22:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:40,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:40,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:40,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:22:40,823 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) [2024-06-14 12:22:40,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:40,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:22:40,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:42,737 INFO L124 PetriNetUnfolderBase]: 5981/9360 cut-off events. [2024-06-14 12:22:42,737 INFO L125 PetriNetUnfolderBase]: For 532383/532386 co-relation queries the response was YES. [2024-06-14 12:22:42,831 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. [2024-06-14 12:22:42,875 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 445 selfloop transitions, 27 changer transitions 0/475 dead transitions. [2024-06-14 12:22:42,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 475 transitions, 7730 flow [2024-06-14 12:22:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:22:42,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:22:42,877 INFO L175 Difference]: Start difference. First operand has 264 places, 466 transitions, 6752 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:22:42,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 475 transitions, 7730 flow [2024-06-14 12:22:44,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 475 transitions, 7632 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:44,013 INFO L231 Difference]: Finished difference. Result has 265 places, 466 transitions, 6714 flow [2024-06-14 12:22:44,014 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} [2024-06-14 12:22:44,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 12:22:44,014 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 466 transitions, 6714 flow [2024-06-14 12:22:44,014 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) [2024-06-14 12:22:44,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:44,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:44,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:22:44,015 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)] === [2024-06-14 12:22:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1705172110, now seen corresponding path program 1 times [2024-06-14 12:22:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212972927] [2024-06-14 12:22:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:44,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212972927] [2024-06-14 12:22:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212972927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:44,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:44,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:44,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829301763] [2024-06-14 12:22:44,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:44,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:44,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:44,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:44,852 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) [2024-06-14 12:22:44,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:44,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:46,803 INFO L124 PetriNetUnfolderBase]: 5890/9268 cut-off events. [2024-06-14 12:22:46,803 INFO L125 PetriNetUnfolderBase]: For 550009/550015 co-relation queries the response was YES. [2024-06-14 12:22:46,866 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. [2024-06-14 12:22:46,905 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 436 selfloop transitions, 63 changer transitions 0/512 dead transitions. [2024-06-14 12:22:46,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 512 transitions, 8166 flow [2024-06-14 12:22:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:22:46,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:22:46,907 INFO L175 Difference]: Start difference. First operand has 265 places, 466 transitions, 6714 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:22:46,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 512 transitions, 8166 flow [2024-06-14 12:22:48,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 512 transitions, 8090 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:48,028 INFO L231 Difference]: Finished difference. Result has 267 places, 485 transitions, 7009 flow [2024-06-14 12:22:48,029 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} [2024-06-14 12:22:48,029 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 12:22:48,029 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 485 transitions, 7009 flow [2024-06-14 12:22:48,029 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) [2024-06-14 12:22:48,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:48,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:48,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:22:48,030 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)] === [2024-06-14 12:22:48,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash 588109195, now seen corresponding path program 1 times [2024-06-14 12:22:48,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:48,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068643230] [2024-06-14 12:22:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:48,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:49,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068643230] [2024-06-14 12:22:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068643230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:49,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:49,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:22:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103769318] [2024-06-14 12:22:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:22:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:22:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:22:49,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:49,538 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) [2024-06-14 12:22:49,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:49,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:51,728 INFO L124 PetriNetUnfolderBase]: 6008/9462 cut-off events. [2024-06-14 12:22:51,729 INFO L125 PetriNetUnfolderBase]: For 601474/601478 co-relation queries the response was YES. [2024-06-14 12:22:51,792 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. [2024-06-14 12:22:51,829 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 462 selfloop transitions, 56 changer transitions 0/531 dead transitions. [2024-06-14 12:22:51,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 531 transitions, 8366 flow [2024-06-14 12:22:51,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:22:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:22:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 12:22:51,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:22:51,831 INFO L175 Difference]: Start difference. First operand has 267 places, 485 transitions, 7009 flow. Second operand 11 states and 198 transitions. [2024-06-14 12:22:51,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 531 transitions, 8366 flow [2024-06-14 12:22:52,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 531 transitions, 8296 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:52,944 INFO L231 Difference]: Finished difference. Result has 275 places, 489 transitions, 7215 flow [2024-06-14 12:22:52,945 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} [2024-06-14 12:22:52,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 12:22:52,945 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 489 transitions, 7215 flow [2024-06-14 12:22:52,945 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) [2024-06-14 12:22:52,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:52,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:52,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:22:52,946 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)] === [2024-06-14 12:22:52,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:52,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1319633044, now seen corresponding path program 1 times [2024-06-14 12:22:52,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:52,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081193117] [2024-06-14 12:22:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:53,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081193117] [2024-06-14 12:22:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081193117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742575740] [2024-06-14 12:22:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:53,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:53,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:53,747 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) [2024-06-14 12:22:53,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:53,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:53,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:55,672 INFO L124 PetriNetUnfolderBase]: 6029/9493 cut-off events. [2024-06-14 12:22:55,672 INFO L125 PetriNetUnfolderBase]: For 592455/592462 co-relation queries the response was YES. [2024-06-14 12:22:55,790 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. [2024-06-14 12:22:55,838 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 464 selfloop transitions, 52 changer transitions 0/529 dead transitions. [2024-06-14 12:22:55,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 529 transitions, 8912 flow [2024-06-14 12:22:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:22:55,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:22:55,840 INFO L175 Difference]: Start difference. First operand has 275 places, 489 transitions, 7215 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:22:55,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 529 transitions, 8912 flow [2024-06-14 12:22:57,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 529 transitions, 8732 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 12:22:57,088 INFO L231 Difference]: Finished difference. Result has 276 places, 505 transitions, 7392 flow [2024-06-14 12:22:57,088 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} [2024-06-14 12:22:57,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:22:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 505 transitions, 7392 flow [2024-06-14 12:22:57,089 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) [2024-06-14 12:22:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:57,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:22:57,089 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)] === [2024-06-14 12:22:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 587514549, now seen corresponding path program 2 times [2024-06-14 12:22:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788034852] [2024-06-14 12:22:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788034852] [2024-06-14 12:22:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788034852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:58,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:58,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:22:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593402626] [2024-06-14 12:22:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:58,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:22:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:22:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:22:58,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:22:58,467 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) [2024-06-14 12:22:58,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:58,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:22:58,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:00,562 INFO L124 PetriNetUnfolderBase]: 6070/9568 cut-off events. [2024-06-14 12:23:00,562 INFO L125 PetriNetUnfolderBase]: For 623604/623616 co-relation queries the response was YES. [2024-06-14 12:23:00,656 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. [2024-06-14 12:23:00,697 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 351 selfloop transitions, 192 changer transitions 0/556 dead transitions. [2024-06-14 12:23:00,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 556 transitions, 8805 flow [2024-06-14 12:23:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:23:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:23:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-14 12:23:00,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-14 12:23:00,699 INFO L175 Difference]: Start difference. First operand has 276 places, 505 transitions, 7392 flow. Second operand 11 states and 211 transitions. [2024-06-14 12:23:00,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 556 transitions, 8805 flow [2024-06-14 12:23:02,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 556 transitions, 8687 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:02,132 INFO L231 Difference]: Finished difference. Result has 284 places, 506 transitions, 7724 flow [2024-06-14 12:23:02,132 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} [2024-06-14 12:23:02,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 12:23:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 506 transitions, 7724 flow [2024-06-14 12:23:02,133 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) [2024-06-14 12:23:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:23:02,133 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)] === [2024-06-14 12:23:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 760004439, now seen corresponding path program 3 times [2024-06-14 12:23:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047151915] [2024-06-14 12:23:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:03,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047151915] [2024-06-14 12:23:03,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047151915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:03,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:23:03,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517948397] [2024-06-14 12:23:03,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:03,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:23:03,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:03,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:23:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:23:03,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:03,588 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) [2024-06-14 12:23:03,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:03,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:03,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:05,776 INFO L124 PetriNetUnfolderBase]: 6111/9637 cut-off events. [2024-06-14 12:23:05,777 INFO L125 PetriNetUnfolderBase]: For 644353/644365 co-relation queries the response was YES. [2024-06-14 12:23:05,861 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. [2024-06-14 12:23:05,903 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 194 changer transitions 0/557 dead transitions. [2024-06-14 12:23:05,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 557 transitions, 9144 flow [2024-06-14 12:23:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:23:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:23:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:23:05,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:05,905 INFO L175 Difference]: Start difference. First operand has 284 places, 506 transitions, 7724 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:23:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 557 transitions, 9144 flow [2024-06-14 12:23:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 557 transitions, 8712 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:07,217 INFO L231 Difference]: Finished difference. Result has 286 places, 507 transitions, 7748 flow [2024-06-14 12:23:07,218 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} [2024-06-14 12:23:07,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 12:23:07,218 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 507 transitions, 7748 flow [2024-06-14 12:23:07,218 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) [2024-06-14 12:23:07,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:07,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:23:07,219 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)] === [2024-06-14 12:23:07,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2101497827, now seen corresponding path program 4 times [2024-06-14 12:23:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:07,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340046114] [2024-06-14 12:23:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:07,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:08,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340046114] [2024-06-14 12:23:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340046114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:08,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:23:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732500730] [2024-06-14 12:23:08,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:23:08,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:23:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:23:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:08,761 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) [2024-06-14 12:23:08,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:08,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:08,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:10,958 INFO L124 PetriNetUnfolderBase]: 6152/9712 cut-off events. [2024-06-14 12:23:10,959 INFO L125 PetriNetUnfolderBase]: For 663687/663699 co-relation queries the response was YES. [2024-06-14 12:23:11,068 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. [2024-06-14 12:23:11,116 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 339 selfloop transitions, 207 changer transitions 0/559 dead transitions. [2024-06-14 12:23:11,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 559 transitions, 9176 flow [2024-06-14 12:23:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:23:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:23:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:23:11,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:11,118 INFO L175 Difference]: Start difference. First operand has 286 places, 507 transitions, 7748 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:23:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 559 transitions, 9176 flow [2024-06-14 12:23:12,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 559 transitions, 8738 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:12,507 INFO L231 Difference]: Finished difference. Result has 288 places, 508 transitions, 7794 flow [2024-06-14 12:23:12,507 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} [2024-06-14 12:23:12,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 12:23:12,508 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 508 transitions, 7794 flow [2024-06-14 12:23:12,508 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) [2024-06-14 12:23:12,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:12,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:12,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:23:12,509 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)] === [2024-06-14 12:23:12,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 119315266, now seen corresponding path program 2 times [2024-06-14 12:23:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:12,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692376348] [2024-06-14 12:23:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:13,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692376348] [2024-06-14 12:23:13,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692376348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:13,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:13,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:13,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234865874] [2024-06-14 12:23:13,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:13,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:13,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:13,302 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) [2024-06-14 12:23:13,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:13,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:13,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:15,288 INFO L124 PetriNetUnfolderBase]: 6149/9705 cut-off events. [2024-06-14 12:23:15,288 INFO L125 PetriNetUnfolderBase]: For 661543/661550 co-relation queries the response was YES. [2024-06-14 12:23:15,386 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. [2024-06-14 12:23:15,429 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 461 selfloop transitions, 54 changer transitions 0/528 dead transitions. [2024-06-14 12:23:15,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 528 transitions, 9148 flow [2024-06-14 12:23:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:23:15,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:23:15,430 INFO L175 Difference]: Start difference. First operand has 288 places, 508 transitions, 7794 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:23:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 528 transitions, 9148 flow [2024-06-14 12:23:16,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 528 transitions, 8670 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:16,721 INFO L231 Difference]: Finished difference. Result has 287 places, 508 transitions, 7431 flow [2024-06-14 12:23:16,721 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} [2024-06-14 12:23:16,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 12:23:16,721 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 508 transitions, 7431 flow [2024-06-14 12:23:16,721 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) [2024-06-14 12:23:16,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:16,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:16,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:23:16,722 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)] === [2024-06-14 12:23:16,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1323446292, now seen corresponding path program 2 times [2024-06-14 12:23:16,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:16,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332201971] [2024-06-14 12:23:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:17,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:17,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332201971] [2024-06-14 12:23:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332201971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144824001] [2024-06-14 12:23:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:17,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:17,663 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) [2024-06-14 12:23:17,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:17,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:17,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:19,757 INFO L124 PetriNetUnfolderBase]: 6177/9748 cut-off events. [2024-06-14 12:23:19,758 INFO L125 PetriNetUnfolderBase]: For 671301/671309 co-relation queries the response was YES. [2024-06-14 12:23:19,842 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. [2024-06-14 12:23:19,881 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 464 selfloop transitions, 75 changer transitions 0/552 dead transitions. [2024-06-14 12:23:19,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 552 transitions, 8916 flow [2024-06-14 12:23:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:23:19,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:23:19,883 INFO L175 Difference]: Start difference. First operand has 287 places, 508 transitions, 7431 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:23:19,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 552 transitions, 8916 flow [2024-06-14 12:23:21,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 552 transitions, 8814 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:21,171 INFO L231 Difference]: Finished difference. Result has 291 places, 524 transitions, 7670 flow [2024-06-14 12:23:21,172 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} [2024-06-14 12:23:21,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:23:21,172 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 524 transitions, 7670 flow [2024-06-14 12:23:21,173 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) [2024-06-14 12:23:21,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:21,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:21,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:23:21,173 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)] === [2024-06-14 12:23:21,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1314240222, now seen corresponding path program 3 times [2024-06-14 12:23:21,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673701511] [2024-06-14 12:23:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:21,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:22,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:22,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673701511] [2024-06-14 12:23:22,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673701511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:22,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:22,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:22,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039250716] [2024-06-14 12:23:22,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:22,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:22,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:22,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:22,232 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) [2024-06-14 12:23:22,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:22,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:22,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:24,410 INFO L124 PetriNetUnfolderBase]: 6192/9767 cut-off events. [2024-06-14 12:23:24,410 INFO L125 PetriNetUnfolderBase]: For 688674/688678 co-relation queries the response was YES. [2024-06-14 12:23:24,499 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. [2024-06-14 12:23:24,541 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 471 selfloop transitions, 72 changer transitions 0/556 dead transitions. [2024-06-14 12:23:24,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 556 transitions, 8970 flow [2024-06-14 12:23:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:23:24,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:23:24,543 INFO L175 Difference]: Start difference. First operand has 291 places, 524 transitions, 7670 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:23:24,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 556 transitions, 8970 flow [2024-06-14 12:23:26,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 556 transitions, 8884 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:26,087 INFO L231 Difference]: Finished difference. Result has 297 places, 533 transitions, 7866 flow [2024-06-14 12:23:26,087 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} [2024-06-14 12:23:26,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 12:23:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 533 transitions, 7866 flow [2024-06-14 12:23:26,088 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) [2024-06-14 12:23:26,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:26,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:23:26,088 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)] === [2024-06-14 12:23:26,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash -855439602, now seen corresponding path program 4 times [2024-06-14 12:23:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026559079] [2024-06-14 12:23:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:27,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:27,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026559079] [2024-06-14 12:23:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026559079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:27,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821040993] [2024-06-14 12:23:27,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:27,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:27,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:27,143 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) [2024-06-14 12:23:27,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:27,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:27,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:29,403 INFO L124 PetriNetUnfolderBase]: 6189/9763 cut-off events. [2024-06-14 12:23:29,403 INFO L125 PetriNetUnfolderBase]: For 704366/704375 co-relation queries the response was YES. [2024-06-14 12:23:29,480 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. [2024-06-14 12:23:29,520 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 72 changer transitions 0/553 dead transitions. [2024-06-14 12:23:29,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 553 transitions, 9028 flow [2024-06-14 12:23:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:23:29,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:23:29,522 INFO L175 Difference]: Start difference. First operand has 297 places, 533 transitions, 7866 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:23:29,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 553 transitions, 9028 flow [2024-06-14 12:23:30,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 553 transitions, 8852 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:30,795 INFO L231 Difference]: Finished difference. Result has 300 places, 533 transitions, 7841 flow [2024-06-14 12:23:30,796 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} [2024-06-14 12:23:30,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 12:23:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 533 transitions, 7841 flow [2024-06-14 12:23:30,796 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) [2024-06-14 12:23:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:30,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:23:30,797 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)] === [2024-06-14 12:23:30,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1313911188, now seen corresponding path program 1 times [2024-06-14 12:23:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281068807] [2024-06-14 12:23:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:30,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:31,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281068807] [2024-06-14 12:23:31,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281068807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:31,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:31,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:31,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112802811] [2024-06-14 12:23:31,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:31,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:31,593 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) [2024-06-14 12:23:31,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:31,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:31,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:33,872 INFO L124 PetriNetUnfolderBase]: 6080/9614 cut-off events. [2024-06-14 12:23:33,872 INFO L125 PetriNetUnfolderBase]: For 730545/730631 co-relation queries the response was YES. [2024-06-14 12:23:33,945 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. [2024-06-14 12:23:33,986 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 449 selfloop transitions, 86 changer transitions 0/565 dead transitions. [2024-06-14 12:23:33,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 565 transitions, 9263 flow [2024-06-14 12:23:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:23:33,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:23:33,987 INFO L175 Difference]: Start difference. First operand has 300 places, 533 transitions, 7841 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:23:33,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 565 transitions, 9263 flow [2024-06-14 12:23:35,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 565 transitions, 9098 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:35,341 INFO L231 Difference]: Finished difference. Result has 304 places, 542 transitions, 8040 flow [2024-06-14 12:23:35,342 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} [2024-06-14 12:23:35,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-14 12:23:35,342 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 542 transitions, 8040 flow [2024-06-14 12:23:35,342 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) [2024-06-14 12:23:35,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:35,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:35,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:23:35,343 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)] === [2024-06-14 12:23:35,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2093057411, now seen corresponding path program 5 times [2024-06-14 12:23:35,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:35,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791205358] [2024-06-14 12:23:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:35,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791205358] [2024-06-14 12:23:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791205358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:36,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:36,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:23:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65581810] [2024-06-14 12:23:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:23:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:23:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:23:37,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:37,183 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) [2024-06-14 12:23:37,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:37,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:37,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:39,537 INFO L124 PetriNetUnfolderBase]: 6169/9727 cut-off events. [2024-06-14 12:23:39,538 INFO L125 PetriNetUnfolderBase]: For 739086/739090 co-relation queries the response was YES. [2024-06-14 12:23:39,612 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. [2024-06-14 12:23:39,648 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 486 selfloop transitions, 87 changer transitions 0/586 dead transitions. [2024-06-14 12:23:39,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 586 transitions, 9409 flow [2024-06-14 12:23:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:23:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:23:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:23:39,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:23:39,649 INFO L175 Difference]: Start difference. First operand has 304 places, 542 transitions, 8040 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:23:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 586 transitions, 9409 flow [2024-06-14 12:23:41,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 586 transitions, 9261 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:41,198 INFO L231 Difference]: Finished difference. Result has 310 places, 542 transitions, 8082 flow [2024-06-14 12:23:41,199 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} [2024-06-14 12:23:41,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 12:23:41,202 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 542 transitions, 8082 flow [2024-06-14 12:23:41,202 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) [2024-06-14 12:23:41,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:41,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:41,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:23:41,202 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)] === [2024-06-14 12:23:41,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash -107092286, now seen corresponding path program 5 times [2024-06-14 12:23:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:41,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886470721] [2024-06-14 12:23:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:41,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:42,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:42,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886470721] [2024-06-14 12:23:42,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886470721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:42,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:42,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:42,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007652390] [2024-06-14 12:23:42,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:42,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:42,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:42,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:42,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:42,501 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) [2024-06-14 12:23:42,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:42,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:42,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:44,606 INFO L124 PetriNetUnfolderBase]: 6180/9746 cut-off events. [2024-06-14 12:23:44,606 INFO L125 PetriNetUnfolderBase]: For 714630/714639 co-relation queries the response was YES. [2024-06-14 12:23:44,682 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. [2024-06-14 12:23:44,719 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 462 selfloop transitions, 100 changer transitions 0/575 dead transitions. [2024-06-14 12:23:44,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 575 transitions, 9543 flow [2024-06-14 12:23:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:23:44,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:23:44,721 INFO L175 Difference]: Start difference. First operand has 310 places, 542 transitions, 8082 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:23:44,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 575 transitions, 9543 flow [2024-06-14 12:23:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 575 transitions, 9123 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-14 12:23:46,185 INFO L231 Difference]: Finished difference. Result has 307 places, 548 transitions, 7959 flow [2024-06-14 12:23:46,186 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} [2024-06-14 12:23:46,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 12:23:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 548 transitions, 7959 flow [2024-06-14 12:23:46,186 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) [2024-06-14 12:23:46,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:46,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:23:46,187 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)] === [2024-06-14 12:23:46,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -106823516, now seen corresponding path program 6 times [2024-06-14 12:23:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460153730] [2024-06-14 12:23:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:47,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:47,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460153730] [2024-06-14 12:23:47,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460153730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:47,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:47,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983402350] [2024-06-14 12:23:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:47,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:47,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:47,518 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) [2024-06-14 12:23:47,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:47,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:49,565 INFO L124 PetriNetUnfolderBase]: 6188/9760 cut-off events. [2024-06-14 12:23:49,565 INFO L125 PetriNetUnfolderBase]: For 705405/705409 co-relation queries the response was YES. [2024-06-14 12:23:49,643 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. [2024-06-14 12:23:49,681 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 480 selfloop transitions, 82 changer transitions 0/575 dead transitions. [2024-06-14 12:23:49,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 575 transitions, 9278 flow [2024-06-14 12:23:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:23:49,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:23:49,683 INFO L175 Difference]: Start difference. First operand has 307 places, 548 transitions, 7959 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:23:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 575 transitions, 9278 flow [2024-06-14 12:23:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 575 transitions, 9098 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:51,106 INFO L231 Difference]: Finished difference. Result has 310 places, 554 transitions, 8067 flow [2024-06-14 12:23:51,107 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} [2024-06-14 12:23:51,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 12:23:51,107 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 554 transitions, 8067 flow [2024-06-14 12:23:51,107 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) [2024-06-14 12:23:51,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:51,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:23:51,108 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)] === [2024-06-14 12:23:51,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash -103279038, now seen corresponding path program 3 times [2024-06-14 12:23:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:51,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391643225] [2024-06-14 12:23:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:51,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391643225] [2024-06-14 12:23:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391643225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:51,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324582492] [2024-06-14 12:23:51,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:52,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:52,067 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) [2024-06-14 12:23:52,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:52,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:52,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:54,175 INFO L124 PetriNetUnfolderBase]: 6207/9785 cut-off events. [2024-06-14 12:23:54,175 INFO L125 PetriNetUnfolderBase]: For 692364/692371 co-relation queries the response was YES. [2024-06-14 12:23:54,248 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. [2024-06-14 12:23:54,286 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 507 selfloop transitions, 63 changer transitions 0/583 dead transitions. [2024-06-14 12:23:54,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 583 transitions, 9692 flow [2024-06-14 12:23:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:23:54,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:23:54,287 INFO L175 Difference]: Start difference. First operand has 310 places, 554 transitions, 8067 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:23:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 583 transitions, 9692 flow [2024-06-14 12:23:55,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 583 transitions, 9517 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:55,735 INFO L231 Difference]: Finished difference. Result has 311 places, 563 transitions, 8151 flow [2024-06-14 12:23:55,736 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} [2024-06-14 12:23:55,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 12:23:55,736 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 563 transitions, 8151 flow [2024-06-14 12:23:55,736 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) [2024-06-14 12:23:55,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:55,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:55,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:23:55,737 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)] === [2024-06-14 12:23:55,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash -103129308, now seen corresponding path program 4 times [2024-06-14 12:23:55,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:55,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670750248] [2024-06-14 12:23:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:56,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670750248] [2024-06-14 12:23:56,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670750248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:56,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:56,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022519238] [2024-06-14 12:23:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:56,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:23:56,612 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) [2024-06-14 12:23:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:56,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:23:56,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:58,518 INFO L124 PetriNetUnfolderBase]: 6220/9800 cut-off events. [2024-06-14 12:23:58,519 INFO L125 PetriNetUnfolderBase]: For 692211/692218 co-relation queries the response was YES. [2024-06-14 12:23:58,625 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. [2024-06-14 12:23:58,672 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 502 selfloop transitions, 71 changer transitions 0/586 dead transitions. [2024-06-14 12:23:58,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 586 transitions, 9736 flow [2024-06-14 12:23:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:23:58,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:23:58,673 INFO L175 Difference]: Start difference. First operand has 311 places, 563 transitions, 8151 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:23:58,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 586 transitions, 9736 flow [2024-06-14 12:24:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 586 transitions, 9590 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:00,018 INFO L231 Difference]: Finished difference. Result has 314 places, 570 transitions, 8269 flow [2024-06-14 12:24:00,019 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} [2024-06-14 12:24:00,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:24:00,019 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 570 transitions, 8269 flow [2024-06-14 12:24:00,019 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) [2024-06-14 12:24:00,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:00,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:00,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:24:00,020 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)] === [2024-06-14 12:24:00,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 820153999, now seen corresponding path program 6 times [2024-06-14 12:24:00,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:00,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017173701] [2024-06-14 12:24:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:00,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:01,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:01,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017173701] [2024-06-14 12:24:01,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017173701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:01,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:01,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:24:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542008313] [2024-06-14 12:24:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:01,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:24:01,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:01,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:24:01,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:24:01,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:01,727 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) [2024-06-14 12:24:01,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:01,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:01,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:03,847 INFO L124 PetriNetUnfolderBase]: 6259/9871 cut-off events. [2024-06-14 12:24:03,848 INFO L125 PetriNetUnfolderBase]: For 713026/713038 co-relation queries the response was YES. [2024-06-14 12:24:03,938 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. [2024-06-14 12:24:03,978 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 418 selfloop transitions, 193 changer transitions 0/624 dead transitions. [2024-06-14 12:24:03,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 624 transitions, 9932 flow [2024-06-14 12:24:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:24:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:24:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:24:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 12:24:03,980 INFO L175 Difference]: Start difference. First operand has 314 places, 570 transitions, 8269 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:24:03,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 624 transitions, 9932 flow [2024-06-14 12:24:05,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 624 transitions, 9833 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:05,526 INFO L231 Difference]: Finished difference. Result has 320 places, 571 transitions, 8630 flow [2024-06-14 12:24:05,527 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} [2024-06-14 12:24:05,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-14 12:24:05,527 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 571 transitions, 8630 flow [2024-06-14 12:24:05,527 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) [2024-06-14 12:24:05,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:05,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:24:05,528 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)] === [2024-06-14 12:24:05,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 329197737, now seen corresponding path program 7 times [2024-06-14 12:24:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512490327] [2024-06-14 12:24:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:05,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512490327] [2024-06-14 12:24:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512490327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:06,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:06,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:24:06,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269633055] [2024-06-14 12:24:06,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:06,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:24:06,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:06,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:24:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:24:07,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:07,161 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) [2024-06-14 12:24:07,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:07,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:07,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:09,252 INFO L124 PetriNetUnfolderBase]: 6300/9946 cut-off events. [2024-06-14 12:24:09,252 INFO L125 PetriNetUnfolderBase]: For 723332/723344 co-relation queries the response was YES. [2024-06-14 12:24:09,350 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. [2024-06-14 12:24:09,396 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 421 selfloop transitions, 190 changer transitions 0/624 dead transitions. [2024-06-14 12:24:09,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 624 transitions, 10268 flow [2024-06-14 12:24:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:24:09,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:24:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:24:09,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:24:09,397 INFO L175 Difference]: Start difference. First operand has 320 places, 571 transitions, 8630 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:24:09,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 624 transitions, 10268 flow [2024-06-14 12:24:11,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 624 transitions, 9824 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:11,437 INFO L231 Difference]: Finished difference. Result has 322 places, 572 transitions, 8642 flow [2024-06-14 12:24:11,437 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} [2024-06-14 12:24:11,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 12:24:11,437 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 572 transitions, 8642 flow [2024-06-14 12:24:11,438 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) [2024-06-14 12:24:11,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:11,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:11,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:24:11,439 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)] === [2024-06-14 12:24:11,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1391442615, now seen corresponding path program 8 times [2024-06-14 12:24:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:11,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799922873] [2024-06-14 12:24:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:13,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:13,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799922873] [2024-06-14 12:24:13,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799922873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:13,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:13,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:24:13,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261928454] [2024-06-14 12:24:13,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:13,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:24:13,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:24:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:24:13,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:13,282 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) [2024-06-14 12:24:13,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:13,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:13,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:15,459 INFO L124 PetriNetUnfolderBase]: 6341/10023 cut-off events. [2024-06-14 12:24:15,459 INFO L125 PetriNetUnfolderBase]: For 724446/724458 co-relation queries the response was YES. [2024-06-14 12:24:15,589 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. [2024-06-14 12:24:15,636 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 400 selfloop transitions, 215 changer transitions 0/628 dead transitions. [2024-06-14 12:24:15,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 628 transitions, 10302 flow [2024-06-14 12:24:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:24:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:24:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-14 12:24:15,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42917547568710357 [2024-06-14 12:24:15,637 INFO L175 Difference]: Start difference. First operand has 322 places, 572 transitions, 8642 flow. Second operand 11 states and 203 transitions. [2024-06-14 12:24:15,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 628 transitions, 10302 flow [2024-06-14 12:24:17,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 628 transitions, 9864 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:17,797 INFO L231 Difference]: Finished difference. Result has 325 places, 573 transitions, 8710 flow [2024-06-14 12:24:17,798 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} [2024-06-14 12:24:17,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 12:24:17,798 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 573 transitions, 8710 flow [2024-06-14 12:24:17,798 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) [2024-06-14 12:24:17,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:17,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:17,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:24:17,799 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)] === [2024-06-14 12:24:17,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1923764516, now seen corresponding path program 2 times [2024-06-14 12:24:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050912405] [2024-06-14 12:24:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:17,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050912405] [2024-06-14 12:24:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050912405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:18,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:18,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138333720] [2024-06-14 12:24:18,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:18,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:18,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:18,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:18,841 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) [2024-06-14 12:24:18,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:18,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:18,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:20,772 INFO L124 PetriNetUnfolderBase]: 6234/9872 cut-off events. [2024-06-14 12:24:20,772 INFO L125 PetriNetUnfolderBase]: For 722530/722640 co-relation queries the response was YES. [2024-06-14 12:24:20,875 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. [2024-06-14 12:24:20,922 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 469 selfloop transitions, 97 changer transitions 0/602 dead transitions. [2024-06-14 12:24:20,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 602 transitions, 10253 flow [2024-06-14 12:24:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:24:20,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:24:20,923 INFO L175 Difference]: Start difference. First operand has 325 places, 573 transitions, 8710 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:24:20,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 602 transitions, 10253 flow [2024-06-14 12:24:22,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 602 transitions, 9765 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:22,649 INFO L231 Difference]: Finished difference. Result has 325 places, 581 transitions, 8627 flow [2024-06-14 12:24:22,650 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} [2024-06-14 12:24:22,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 12:24:22,650 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 581 transitions, 8627 flow [2024-06-14 12:24:22,650 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) [2024-06-14 12:24:22,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:22,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:22,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:24:22,651 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)] === [2024-06-14 12:24:22,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -881144086, now seen corresponding path program 7 times [2024-06-14 12:24:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270234667] [2024-06-14 12:24:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:22,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270234667] [2024-06-14 12:24:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270234667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179135953] [2024-06-14 12:24:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:23,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:23,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:23,805 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) [2024-06-14 12:24:23,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:23,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:23,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:25,867 INFO L124 PetriNetUnfolderBase]: 6408/10108 cut-off events. [2024-06-14 12:24:25,867 INFO L125 PetriNetUnfolderBase]: For 708433/708442 co-relation queries the response was YES. [2024-06-14 12:24:25,980 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. [2024-06-14 12:24:26,028 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 510 selfloop transitions, 77 changer transitions 0/600 dead transitions. [2024-06-14 12:24:26,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 600 transitions, 9924 flow [2024-06-14 12:24:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:24:26,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:24:26,030 INFO L175 Difference]: Start difference. First operand has 325 places, 581 transitions, 8627 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:24:26,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 600 transitions, 9924 flow [2024-06-14 12:24:27,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 600 transitions, 9739 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:27,708 INFO L231 Difference]: Finished difference. Result has 329 places, 584 transitions, 8666 flow [2024-06-14 12:24:27,708 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} [2024-06-14 12:24:27,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 12:24:27,709 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 584 transitions, 8666 flow [2024-06-14 12:24:27,709 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) [2024-06-14 12:24:27,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:27,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:27,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:24:27,709 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)] === [2024-06-14 12:24:27,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1399082076, now seen corresponding path program 5 times [2024-06-14 12:24:27,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:27,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261863237] [2024-06-14 12:24:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:27,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:28,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261863237] [2024-06-14 12:24:28,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261863237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:28,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:28,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:28,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195824754] [2024-06-14 12:24:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:28,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:28,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:28,577 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) [2024-06-14 12:24:28,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:30,716 INFO L124 PetriNetUnfolderBase]: 6400/10106 cut-off events. [2024-06-14 12:24:30,716 INFO L125 PetriNetUnfolderBase]: For 722175/722175 co-relation queries the response was YES. [2024-06-14 12:24:30,807 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. [2024-06-14 12:24:30,849 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 555 selfloop transitions, 32 changer transitions 0/600 dead transitions. [2024-06-14 12:24:30,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 600 transitions, 10056 flow [2024-06-14 12:24:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:24:30,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:24:30,850 INFO L175 Difference]: Start difference. First operand has 329 places, 584 transitions, 8666 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:24:30,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 600 transitions, 10056 flow [2024-06-14 12:24:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 600 transitions, 9891 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:32,431 INFO L231 Difference]: Finished difference. Result has 332 places, 584 transitions, 8577 flow [2024-06-14 12:24:32,431 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} [2024-06-14 12:24:32,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 12:24:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 584 transitions, 8577 flow [2024-06-14 12:24:32,432 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) [2024-06-14 12:24:32,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:32,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:24:32,432 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)] === [2024-06-14 12:24:32,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1393896060, now seen corresponding path program 6 times [2024-06-14 12:24:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430959458] [2024-06-14 12:24:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:33,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430959458] [2024-06-14 12:24:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430959458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:33,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524619129] [2024-06-14 12:24:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:33,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:33,217 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) [2024-06-14 12:24:33,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:33,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:33,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:35,379 INFO L124 PetriNetUnfolderBase]: 6405/10111 cut-off events. [2024-06-14 12:24:35,379 INFO L125 PetriNetUnfolderBase]: For 719174/719184 co-relation queries the response was YES. [2024-06-14 12:24:35,476 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. [2024-06-14 12:24:35,520 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 565 selfloop transitions, 21 changer transitions 0/599 dead transitions. [2024-06-14 12:24:35,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 599 transitions, 9854 flow [2024-06-14 12:24:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:24:35,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:24:35,521 INFO L175 Difference]: Start difference. First operand has 332 places, 584 transitions, 8577 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:24:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 599 transitions, 9854 flow [2024-06-14 12:24:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 599 transitions, 9726 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:37,375 INFO L231 Difference]: Finished difference. Result has 333 places, 587 transitions, 8554 flow [2024-06-14 12:24:37,376 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} [2024-06-14 12:24:37,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 12:24:37,376 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 587 transitions, 8554 flow [2024-06-14 12:24:37,376 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) [2024-06-14 12:24:37,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:37,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:37,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:24:37,377 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)] === [2024-06-14 12:24:37,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash 515656932, now seen corresponding path program 7 times [2024-06-14 12:24:37,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:37,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353718229] [2024-06-14 12:24:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353718229] [2024-06-14 12:24:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353718229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:38,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:38,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:38,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404847113] [2024-06-14 12:24:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:38,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:38,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:38,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:38,316 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) [2024-06-14 12:24:38,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:38,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:38,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:40,497 INFO L124 PetriNetUnfolderBase]: 6402/10108 cut-off events. [2024-06-14 12:24:40,497 INFO L125 PetriNetUnfolderBase]: For 733433/733446 co-relation queries the response was YES. [2024-06-14 12:24:40,607 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. [2024-06-14 12:24:40,652 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 556 selfloop transitions, 28 changer transitions 0/597 dead transitions. [2024-06-14 12:24:40,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 597 transitions, 9896 flow [2024-06-14 12:24:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:40,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:24:40,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:24:40,653 INFO L175 Difference]: Start difference. First operand has 333 places, 587 transitions, 8554 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:24:40,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 597 transitions, 9896 flow [2024-06-14 12:24:42,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 597 transitions, 9828 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:42,529 INFO L231 Difference]: Finished difference. Result has 334 places, 587 transitions, 8548 flow [2024-06-14 12:24:42,530 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} [2024-06-14 12:24:42,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 12:24:42,530 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 587 transitions, 8548 flow [2024-06-14 12:24:42,530 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) [2024-06-14 12:24:42,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:42,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:42,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:24:42,531 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)] === [2024-06-14 12:24:42,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1883476258, now seen corresponding path program 8 times [2024-06-14 12:24:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938885051] [2024-06-14 12:24:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:42,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:43,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:43,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938885051] [2024-06-14 12:24:43,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938885051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:43,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591339055] [2024-06-14 12:24:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:43,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:43,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:43,338 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) [2024-06-14 12:24:43,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:43,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:43,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:45,585 INFO L124 PetriNetUnfolderBase]: 6399/10104 cut-off events. [2024-06-14 12:24:45,585 INFO L125 PetriNetUnfolderBase]: For 748151/748164 co-relation queries the response was YES. [2024-06-14 12:24:45,670 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. [2024-06-14 12:24:45,714 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 563 selfloop transitions, 20 changer transitions 0/596 dead transitions. [2024-06-14 12:24:45,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 596 transitions, 9748 flow [2024-06-14 12:24:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:24:45,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:24:45,715 INFO L175 Difference]: Start difference. First operand has 334 places, 587 transitions, 8548 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:24:45,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 596 transitions, 9748 flow [2024-06-14 12:24:47,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 596 transitions, 9606 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:47,664 INFO L231 Difference]: Finished difference. Result has 334 places, 587 transitions, 8452 flow [2024-06-14 12:24:47,664 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} [2024-06-14 12:24:47,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 12:24:47,665 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 587 transitions, 8452 flow [2024-06-14 12:24:47,665 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) [2024-06-14 12:24:47,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:47,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:47,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:24:47,665 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)] === [2024-06-14 12:24:47,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash 127325755, now seen corresponding path program 9 times [2024-06-14 12:24:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308446559] [2024-06-14 12:24:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:47,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:48,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:48,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308446559] [2024-06-14 12:24:48,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308446559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:48,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:48,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:24:48,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411368825] [2024-06-14 12:24:48,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:48,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:24:48,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:24:48,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:24:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:48,906 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) [2024-06-14 12:24:48,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:48,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:48,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:51,238 INFO L124 PetriNetUnfolderBase]: 6440/10165 cut-off events. [2024-06-14 12:24:51,238 INFO L125 PetriNetUnfolderBase]: For 787754/787764 co-relation queries the response was YES. [2024-06-14 12:24:51,334 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. [2024-06-14 12:24:51,377 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 590 selfloop transitions, 21 changer transitions 0/624 dead transitions. [2024-06-14 12:24:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 624 transitions, 9920 flow [2024-06-14 12:24:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:24:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:24:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:24:51,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:24:51,378 INFO L175 Difference]: Start difference. First operand has 334 places, 587 transitions, 8452 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:24:51,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 624 transitions, 9920 flow [2024-06-14 12:24:53,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 624 transitions, 9878 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:53,171 INFO L231 Difference]: Finished difference. Result has 339 places, 588 transitions, 8524 flow [2024-06-14 12:24:53,171 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} [2024-06-14 12:24:53,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-14 12:24:53,172 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 588 transitions, 8524 flow [2024-06-14 12:24:53,172 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) [2024-06-14 12:24:53,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:53,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:53,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:24:53,172 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)] === [2024-06-14 12:24:53,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1985540229, now seen corresponding path program 10 times [2024-06-14 12:24:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:53,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024828344] [2024-06-14 12:24:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:53,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:54,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:54,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024828344] [2024-06-14 12:24:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024828344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:54,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:54,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:24:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261262715] [2024-06-14 12:24:54,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:24:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:24:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:24:54,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:24:54,648 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) [2024-06-14 12:24:54,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:54,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:24:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:57,043 INFO L124 PetriNetUnfolderBase]: 6481/10244 cut-off events. [2024-06-14 12:24:57,043 INFO L125 PetriNetUnfolderBase]: For 812887/812897 co-relation queries the response was YES. [2024-06-14 12:24:57,140 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. [2024-06-14 12:24:57,180 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 48 changer transitions 0/630 dead transitions. [2024-06-14 12:24:57,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 630 transitions, 10070 flow [2024-06-14 12:24:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:24:57,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:24:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:24:57,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:24:57,182 INFO L175 Difference]: Start difference. First operand has 339 places, 588 transitions, 8524 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:24:57,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 630 transitions, 10070 flow [2024-06-14 12:24:59,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 630 transitions, 9974 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:59,413 INFO L231 Difference]: Finished difference. Result has 341 places, 589 transitions, 8598 flow [2024-06-14 12:24:59,414 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} [2024-06-14 12:24:59,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 12:24:59,414 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 589 transitions, 8598 flow [2024-06-14 12:24:59,414 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) [2024-06-14 12:24:59,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:59,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:59,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:24:59,415 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)] === [2024-06-14 12:24:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1215734129, now seen corresponding path program 11 times [2024-06-14 12:24:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343822444] [2024-06-14 12:24:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:00,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:00,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343822444] [2024-06-14 12:25:00,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343822444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:00,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:00,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:25:00,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906372461] [2024-06-14 12:25:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:25:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:25:00,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:25:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:00,922 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) [2024-06-14 12:25:00,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:00,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:00,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:03,265 INFO L124 PetriNetUnfolderBase]: 6522/10315 cut-off events. [2024-06-14 12:25:03,265 INFO L125 PetriNetUnfolderBase]: For 833710/833720 co-relation queries the response was YES. [2024-06-14 12:25:03,366 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. [2024-06-14 12:25:03,409 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 84 changer transitions 0/638 dead transitions. [2024-06-14 12:25:03,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 638 transitions, 10255 flow [2024-06-14 12:25:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:25:03,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:25:03,411 INFO L175 Difference]: Start difference. First operand has 341 places, 589 transitions, 8598 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:25:03,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 638 transitions, 10255 flow [2024-06-14 12:25:05,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 638 transitions, 10103 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:05,683 INFO L231 Difference]: Finished difference. Result has 343 places, 590 transitions, 8690 flow [2024-06-14 12:25:05,684 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} [2024-06-14 12:25:05,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 12:25:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 590 transitions, 8690 flow [2024-06-14 12:25:05,684 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) [2024-06-14 12:25:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:05,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:05,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:25:05,685 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)] === [2024-06-14 12:25:05,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1640450699, now seen corresponding path program 12 times [2024-06-14 12:25:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619439286] [2024-06-14 12:25:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:07,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:07,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619439286] [2024-06-14 12:25:07,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619439286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:07,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:07,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:25:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909863819] [2024-06-14 12:25:07,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:07,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:25:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:25:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:25:07,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:07,434 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) [2024-06-14 12:25:07,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:07,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:07,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:09,783 INFO L124 PetriNetUnfolderBase]: 6563/10386 cut-off events. [2024-06-14 12:25:09,783 INFO L125 PetriNetUnfolderBase]: For 855187/855197 co-relation queries the response was YES. [2024-06-14 12:25:09,885 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. [2024-06-14 12:25:09,929 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 88 changer transitions 0/637 dead transitions. [2024-06-14 12:25:09,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 637 transitions, 10320 flow [2024-06-14 12:25:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:25:09,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:25:09,931 INFO L175 Difference]: Start difference. First operand has 343 places, 590 transitions, 8690 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:25:09,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 637 transitions, 10320 flow [2024-06-14 12:25:12,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 637 transitions, 10094 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:12,278 INFO L231 Difference]: Finished difference. Result has 345 places, 591 transitions, 8718 flow [2024-06-14 12:25:12,278 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} [2024-06-14 12:25:12,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 12:25:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 591 transitions, 8718 flow [2024-06-14 12:25:12,279 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) [2024-06-14 12:25:12,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:12,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:25:12,279 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)] === [2024-06-14 12:25:12,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1813171229, now seen corresponding path program 13 times [2024-06-14 12:25:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:12,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929405231] [2024-06-14 12:25:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929405231] [2024-06-14 12:25:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929405231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:13,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:13,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:25:13,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439223443] [2024-06-14 12:25:13,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:13,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:25:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:25:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:25:13,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:13,957 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) [2024-06-14 12:25:13,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:13,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:13,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:16,265 INFO L124 PetriNetUnfolderBase]: 6604/10456 cut-off events. [2024-06-14 12:25:16,266 INFO L125 PetriNetUnfolderBase]: For 875703/875713 co-relation queries the response was YES. [2024-06-14 12:25:16,374 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. [2024-06-14 12:25:16,420 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 537 selfloop transitions, 87 changer transitions 0/637 dead transitions. [2024-06-14 12:25:16,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 637 transitions, 10331 flow [2024-06-14 12:25:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:25:16,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:25:16,422 INFO L175 Difference]: Start difference. First operand has 345 places, 591 transitions, 8718 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:25:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 637 transitions, 10331 flow [2024-06-14 12:25:18,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 637 transitions, 10095 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:18,909 INFO L231 Difference]: Finished difference. Result has 347 places, 592 transitions, 8736 flow [2024-06-14 12:25:18,909 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} [2024-06-14 12:25:18,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 12:25:18,910 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 592 transitions, 8736 flow [2024-06-14 12:25:18,910 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) [2024-06-14 12:25:18,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:18,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:25:18,910 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)] === [2024-06-14 12:25:18,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1985770869, now seen corresponding path program 14 times [2024-06-14 12:25:18,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940954113] [2024-06-14 12:25:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940954113] [2024-06-14 12:25:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940954113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:20,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:20,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:25:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064018475] [2024-06-14 12:25:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:25:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:25:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:25:20,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:20,281 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) [2024-06-14 12:25:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:20,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:20,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:22,598 INFO L124 PetriNetUnfolderBase]: 6584/10426 cut-off events. [2024-06-14 12:25:22,599 INFO L125 PetriNetUnfolderBase]: For 866089/866099 co-relation queries the response was YES. [2024-06-14 12:25:22,717 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. [2024-06-14 12:25:22,762 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 49 changer transitions 0/631 dead transitions. [2024-06-14 12:25:22,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 631 transitions, 10115 flow [2024-06-14 12:25:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:25:22,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:25:22,764 INFO L175 Difference]: Start difference. First operand has 347 places, 592 transitions, 8736 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:25:22,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 631 transitions, 10115 flow [2024-06-14 12:25:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 631 transitions, 9879 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:25,590 INFO L231 Difference]: Finished difference. Result has 348 places, 591 transitions, 8508 flow [2024-06-14 12:25:25,590 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} [2024-06-14 12:25:25,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 12:25:25,591 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 591 transitions, 8508 flow [2024-06-14 12:25:25,591 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) [2024-06-14 12:25:25,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:25,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:25,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:25:25,591 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)] === [2024-06-14 12:25:25,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -565270702, now seen corresponding path program 3 times [2024-06-14 12:25:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775503949] [2024-06-14 12:25:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:25,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:26,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:26,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775503949] [2024-06-14 12:25:26,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775503949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:26,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:26,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:26,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865543351] [2024-06-14 12:25:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:26,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:26,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:26,565 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) [2024-06-14 12:25:26,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:26,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:28,723 INFO L124 PetriNetUnfolderBase]: 6458/10255 cut-off events. [2024-06-14 12:25:28,724 INFO L125 PetriNetUnfolderBase]: For 895673/895811 co-relation queries the response was YES. [2024-06-14 12:25:28,841 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. [2024-06-14 12:25:28,890 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 552 selfloop transitions, 27 changer transitions 0/616 dead transitions. [2024-06-14 12:25:28,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 616 transitions, 10132 flow [2024-06-14 12:25:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:25:28,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:25:28,892 INFO L175 Difference]: Start difference. First operand has 348 places, 591 transitions, 8508 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:25:28,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 616 transitions, 10132 flow [2024-06-14 12:25:31,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 616 transitions, 9872 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 12:25:31,517 INFO L231 Difference]: Finished difference. Result has 347 places, 601 transitions, 8580 flow [2024-06-14 12:25:31,517 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} [2024-06-14 12:25:31,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 12:25:31,518 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 601 transitions, 8580 flow [2024-06-14 12:25:31,518 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) [2024-06-14 12:25:31,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:31,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:25:31,518 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)] === [2024-06-14 12:25:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1986972350, now seen corresponding path program 4 times [2024-06-14 12:25:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867724043] [2024-06-14 12:25:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:32,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:32,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867724043] [2024-06-14 12:25:32,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867724043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:32,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:32,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:32,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397922697] [2024-06-14 12:25:32,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:32,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:32,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:32,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:32,332 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) [2024-06-14 12:25:32,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:32,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:34,530 INFO L124 PetriNetUnfolderBase]: 6441/10232 cut-off events. [2024-06-14 12:25:34,530 INFO L125 PetriNetUnfolderBase]: For 888847/888967 co-relation queries the response was YES. [2024-06-14 12:25:34,635 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. [2024-06-14 12:25:34,682 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 556 selfloop transitions, 20 changer transitions 0/613 dead transitions. [2024-06-14 12:25:34,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 613 transitions, 9775 flow [2024-06-14 12:25:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:25:34,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:25:34,684 INFO L175 Difference]: Start difference. First operand has 347 places, 601 transitions, 8580 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:25:34,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 613 transitions, 9775 flow [2024-06-14 12:25:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 613 transitions, 9561 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:36,918 INFO L231 Difference]: Finished difference. Result has 351 places, 601 transitions, 8414 flow [2024-06-14 12:25:36,918 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} [2024-06-14 12:25:36,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 12:25:36,919 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 601 transitions, 8414 flow [2024-06-14 12:25:36,919 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) [2024-06-14 12:25:36,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:36,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:36,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:25:36,920 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)] === [2024-06-14 12:25:36,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2000304830, now seen corresponding path program 5 times [2024-06-14 12:25:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:36,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823364353] [2024-06-14 12:25:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:36,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:37,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:37,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823364353] [2024-06-14 12:25:37,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823364353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:37,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:37,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:37,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129964416] [2024-06-14 12:25:37,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:37,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:38,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:38,015 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) [2024-06-14 12:25:38,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:38,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:38,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:40,162 INFO L124 PetriNetUnfolderBase]: 6429/10214 cut-off events. [2024-06-14 12:25:40,162 INFO L125 PetriNetUnfolderBase]: For 886880/886988 co-relation queries the response was YES. [2024-06-14 12:25:40,275 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. [2024-06-14 12:25:40,320 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 539 selfloop transitions, 39 changer transitions 0/615 dead transitions. [2024-06-14 12:25:40,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 615 transitions, 9620 flow [2024-06-14 12:25:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:25:40,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:25:40,324 INFO L175 Difference]: Start difference. First operand has 351 places, 601 transitions, 8414 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:25:40,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 615 transitions, 9620 flow [2024-06-14 12:25:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 615 transitions, 9502 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:42,936 INFO L231 Difference]: Finished difference. Result has 353 places, 601 transitions, 8382 flow [2024-06-14 12:25:42,936 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} [2024-06-14 12:25:42,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-14 12:25:42,936 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 601 transitions, 8382 flow [2024-06-14 12:25:42,937 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) [2024-06-14 12:25:42,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:42,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:42,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:25:42,937 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)] === [2024-06-14 12:25:42,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2000316734, now seen corresponding path program 8 times [2024-06-14 12:25:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:42,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502239437] [2024-06-14 12:25:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:43,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502239437] [2024-06-14 12:25:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502239437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:43,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894790801] [2024-06-14 12:25:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:25:44,073 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) [2024-06-14 12:25:44,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:44,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:25:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:46,191 INFO L124 PetriNetUnfolderBase]: 6621/10478 cut-off events. [2024-06-14 12:25:46,191 INFO L125 PetriNetUnfolderBase]: For 882434/882438 co-relation queries the response was YES. [2024-06-14 12:25:46,300 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. [2024-06-14 12:25:46,348 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 580 selfloop transitions, 18 changer transitions 0/611 dead transitions. [2024-06-14 12:25:46,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 611 transitions, 9614 flow [2024-06-14 12:25:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:25:46,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 12:25:46,349 INFO L175 Difference]: Start difference. First operand has 353 places, 601 transitions, 8382 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:25:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 611 transitions, 9614 flow [2024-06-14 12:25:48,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 611 transitions, 9404 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 12:25:48,569 INFO L231 Difference]: Finished difference. Result has 352 places, 601 transitions, 8214 flow [2024-06-14 12:25:48,570 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} [2024-06-14 12:25:48,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 12:25:48,570 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 601 transitions, 8214 flow [2024-06-14 12:25:48,570 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) [2024-06-14 12:25:48,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:48,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:25:48,571 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)] === [2024-06-14 12:25:48,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1100547647, now seen corresponding path program 1 times [2024-06-14 12:25:48,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283158392] [2024-06-14 12:25:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:49,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283158392] [2024-06-14 12:25:49,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283158392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:49,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63948856] [2024-06-14 12:25:49,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:49,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:49,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:49,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:49,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:49,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:25:49,499 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) [2024-06-14 12:25:49,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:49,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:25:49,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:51,880 INFO L124 PetriNetUnfolderBase]: 6751/10616 cut-off events. [2024-06-14 12:25:51,880 INFO L125 PetriNetUnfolderBase]: For 901042/901042 co-relation queries the response was YES. [2024-06-14 12:25:51,983 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. [2024-06-14 12:25:52,026 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 599 selfloop transitions, 20 changer transitions 0/622 dead transitions. [2024-06-14 12:25:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 622 transitions, 9590 flow [2024-06-14 12:25:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:25:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:25:52,027 INFO L175 Difference]: Start difference. First operand has 352 places, 601 transitions, 8214 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:25:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 622 transitions, 9590 flow [2024-06-14 12:25:54,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 622 transitions, 9441 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:54,197 INFO L231 Difference]: Finished difference. Result has 352 places, 604 transitions, 8167 flow [2024-06-14 12:25:54,198 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} [2024-06-14 12:25:54,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 12:25:54,198 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 604 transitions, 8167 flow [2024-06-14 12:25:54,198 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) [2024-06-14 12:25:54,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:54,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:25:54,199 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)] === [2024-06-14 12:25:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1104272297, now seen corresponding path program 2 times [2024-06-14 12:25:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:54,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528644237] [2024-06-14 12:25:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:54,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528644237] [2024-06-14 12:25:54,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528644237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:54,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:54,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:54,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834518701] [2024-06-14 12:25:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:54,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:54,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:54,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:54,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:25:54,993 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) [2024-06-14 12:25:54,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:54,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:25:54,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:57,416 INFO L124 PetriNetUnfolderBase]: 6777/10652 cut-off events. [2024-06-14 12:25:57,417 INFO L125 PetriNetUnfolderBase]: For 928196/928196 co-relation queries the response was YES. [2024-06-14 12:25:57,522 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. [2024-06-14 12:25:57,565 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 582 selfloop transitions, 47 changer transitions 0/632 dead transitions. [2024-06-14 12:25:57,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 632 transitions, 10005 flow [2024-06-14 12:25:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:25:57,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:25:57,567 INFO L175 Difference]: Start difference. First operand has 352 places, 604 transitions, 8167 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:25:57,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 632 transitions, 10005 flow [2024-06-14 12:25:59,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 632 transitions, 9925 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:59,689 INFO L231 Difference]: Finished difference. Result has 354 places, 613 transitions, 8361 flow [2024-06-14 12:25:59,689 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} [2024-06-14 12:25:59,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 12:25:59,690 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 613 transitions, 8361 flow [2024-06-14 12:25:59,690 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) [2024-06-14 12:25:59,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:59,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:25:59,691 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)] === [2024-06-14 12:25:59,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1410523804, now seen corresponding path program 1 times [2024-06-14 12:25:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743778991] [2024-06-14 12:25:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:59,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743778991] [2024-06-14 12:26:00,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743778991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:00,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:00,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:00,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688325529] [2024-06-14 12:26:00,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:00,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:00,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:00,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:00,538 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) [2024-06-14 12:26:00,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:00,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:00,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:03,034 INFO L124 PetriNetUnfolderBase]: 6792/10673 cut-off events. [2024-06-14 12:26:03,034 INFO L125 PetriNetUnfolderBase]: For 956159/956159 co-relation queries the response was YES. [2024-06-14 12:26:03,158 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. [2024-06-14 12:26:03,204 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 599 selfloop transitions, 36 changer transitions 0/638 dead transitions. [2024-06-14 12:26:03,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 638 transitions, 9973 flow [2024-06-14 12:26:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:26:03,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 12:26:03,206 INFO L175 Difference]: Start difference. First operand has 354 places, 613 transitions, 8361 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:26:03,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 638 transitions, 9973 flow [2024-06-14 12:26:05,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 638 transitions, 9881 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 12:26:05,798 INFO L231 Difference]: Finished difference. Result has 360 places, 619 transitions, 8453 flow [2024-06-14 12:26:05,798 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} [2024-06-14 12:26:05,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-14 12:26:05,799 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 619 transitions, 8453 flow [2024-06-14 12:26:05,799 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) [2024-06-14 12:26:05,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:05,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:05,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:26:05,799 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)] === [2024-06-14 12:26:05,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 2101074751, now seen corresponding path program 3 times [2024-06-14 12:26:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589151615] [2024-06-14 12:26:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:06,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:06,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589151615] [2024-06-14 12:26:06,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589151615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:06,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:06,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:06,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247908700] [2024-06-14 12:26:06,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:06,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:06,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:06,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:06,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:06,667 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) [2024-06-14 12:26:06,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:06,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:06,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:09,266 INFO L124 PetriNetUnfolderBase]: 6786/10665 cut-off events. [2024-06-14 12:26:09,267 INFO L125 PetriNetUnfolderBase]: For 969078/969078 co-relation queries the response was YES. [2024-06-14 12:26:09,382 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. [2024-06-14 12:26:09,429 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 588 selfloop transitions, 46 changer transitions 0/637 dead transitions. [2024-06-14 12:26:09,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 637 transitions, 9971 flow [2024-06-14 12:26:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:26:09,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:26:09,430 INFO L175 Difference]: Start difference. First operand has 360 places, 619 transitions, 8453 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:26:09,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 637 transitions, 9971 flow [2024-06-14 12:26:12,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 637 transitions, 9868 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:12,217 INFO L231 Difference]: Finished difference. Result has 363 places, 619 transitions, 8448 flow [2024-06-14 12:26:12,218 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} [2024-06-14 12:26:12,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:26:12,218 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 619 transitions, 8448 flow [2024-06-14 12:26:12,218 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) [2024-06-14 12:26:12,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:12,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:26:12,219 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)] === [2024-06-14 12:26:12,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash 798435243, now seen corresponding path program 4 times [2024-06-14 12:26:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:12,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695886264] [2024-06-14 12:26:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:12,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:13,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695886264] [2024-06-14 12:26:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695886264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831134617] [2024-06-14 12:26:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:13,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:13,081 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) [2024-06-14 12:26:13,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:13,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:15,572 INFO L124 PetriNetUnfolderBase]: 6796/10680 cut-off events. [2024-06-14 12:26:15,572 INFO L125 PetriNetUnfolderBase]: For 989325/989328 co-relation queries the response was YES. [2024-06-14 12:26:15,682 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. [2024-06-14 12:26:15,725 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 583 selfloop transitions, 50 changer transitions 0/636 dead transitions. [2024-06-14 12:26:15,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 636 transitions, 10004 flow [2024-06-14 12:26:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:15,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:26:15,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:26:15,726 INFO L175 Difference]: Start difference. First operand has 363 places, 619 transitions, 8448 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:26:15,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 636 transitions, 10004 flow [2024-06-14 12:26:19,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 636 transitions, 9888 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:19,067 INFO L231 Difference]: Finished difference. Result has 364 places, 622 transitions, 8502 flow [2024-06-14 12:26:19,067 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} [2024-06-14 12:26:19,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 12:26:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 622 transitions, 8502 flow [2024-06-14 12:26:19,068 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) [2024-06-14 12:26:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:19,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:26:19,068 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)] === [2024-06-14 12:26:19,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1186961822, now seen corresponding path program 2 times [2024-06-14 12:26:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931945915] [2024-06-14 12:26:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:19,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931945915] [2024-06-14 12:26:19,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931945915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:19,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:19,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:19,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100330628] [2024-06-14 12:26:19,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:19,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:19,966 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) [2024-06-14 12:26:19,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:19,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:19,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:22,409 INFO L124 PetriNetUnfolderBase]: 6811/10701 cut-off events. [2024-06-14 12:26:22,409 INFO L125 PetriNetUnfolderBase]: For 1013187/1013190 co-relation queries the response was YES. [2024-06-14 12:26:22,516 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. [2024-06-14 12:26:22,558 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 596 selfloop transitions, 41 changer transitions 0/640 dead transitions. [2024-06-14 12:26:22,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 640 transitions, 10048 flow [2024-06-14 12:26:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:26:22,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:26:22,560 INFO L175 Difference]: Start difference. First operand has 364 places, 622 transitions, 8502 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:26:22,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 640 transitions, 10048 flow [2024-06-14 12:26:25,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 640 transitions, 9880 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:25,501 INFO L231 Difference]: Finished difference. Result has 366 places, 625 transitions, 8469 flow [2024-06-14 12:26:25,501 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} [2024-06-14 12:26:25,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 12:26:25,502 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 625 transitions, 8469 flow [2024-06-14 12:26:25,502 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) [2024-06-14 12:26:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:25,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:25,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:26:25,503 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)] === [2024-06-14 12:26:25,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1554616144, now seen corresponding path program 3 times [2024-06-14 12:26:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259918113] [2024-06-14 12:26:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:26,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:26,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259918113] [2024-06-14 12:26:26,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259918113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:26,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:26,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:26,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099072841] [2024-06-14 12:26:26,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:26,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:26,393 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) [2024-06-14 12:26:26,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:26,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:26,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:28,986 INFO L124 PetriNetUnfolderBase]: 6826/10722 cut-off events. [2024-06-14 12:26:28,986 INFO L125 PetriNetUnfolderBase]: For 1033700/1033703 co-relation queries the response was YES. [2024-06-14 12:26:29,101 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. [2024-06-14 12:26:29,146 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 600 selfloop transitions, 42 changer transitions 0/645 dead transitions. [2024-06-14 12:26:29,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 645 transitions, 10041 flow [2024-06-14 12:26:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:26:29,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:26:29,148 INFO L175 Difference]: Start difference. First operand has 366 places, 625 transitions, 8469 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:26:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 645 transitions, 10041 flow [2024-06-14 12:26:32,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 645 transitions, 9914 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:32,274 INFO L231 Difference]: Finished difference. Result has 369 places, 628 transitions, 8484 flow [2024-06-14 12:26:32,275 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} [2024-06-14 12:26:32,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-14 12:26:32,275 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 628 transitions, 8484 flow [2024-06-14 12:26:32,275 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) [2024-06-14 12:26:32,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:32,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:32,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:26:32,276 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)] === [2024-06-14 12:26:32,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1554414334, now seen corresponding path program 4 times [2024-06-14 12:26:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:32,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039951971] [2024-06-14 12:26:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:32,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039951971] [2024-06-14 12:26:32,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039951971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:32,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:32,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:32,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768541637] [2024-06-14 12:26:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:32,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:33,061 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) [2024-06-14 12:26:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:35,579 INFO L124 PetriNetUnfolderBase]: 6817/10710 cut-off events. [2024-06-14 12:26:35,580 INFO L125 PetriNetUnfolderBase]: For 1041838/1041841 co-relation queries the response was YES. [2024-06-14 12:26:35,710 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. [2024-06-14 12:26:35,755 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 600 selfloop transitions, 41 changer transitions 0/644 dead transitions. [2024-06-14 12:26:35,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 644 transitions, 9826 flow [2024-06-14 12:26:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:26:35,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:26:35,756 INFO L175 Difference]: Start difference. First operand has 369 places, 628 transitions, 8484 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:26:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 644 transitions, 9826 flow [2024-06-14 12:26:39,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 644 transitions, 9726 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:39,417 INFO L231 Difference]: Finished difference. Result has 372 places, 628 transitions, 8472 flow [2024-06-14 12:26:39,418 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} [2024-06-14 12:26:39,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-14 12:26:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 628 transitions, 8472 flow [2024-06-14 12:26:39,418 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) [2024-06-14 12:26:39,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:39,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:39,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:26:39,419 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)] === [2024-06-14 12:26:39,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1994585175, now seen corresponding path program 5 times [2024-06-14 12:26:39,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:39,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522024374] [2024-06-14 12:26:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:40,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522024374] [2024-06-14 12:26:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522024374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:40,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:40,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439670832] [2024-06-14 12:26:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:40,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:40,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:40,213 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) [2024-06-14 12:26:40,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:40,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:40,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:42,791 INFO L124 PetriNetUnfolderBase]: 6827/10724 cut-off events. [2024-06-14 12:26:42,791 INFO L125 PetriNetUnfolderBase]: For 1057837/1057840 co-relation queries the response was YES. [2024-06-14 12:26:42,907 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. [2024-06-14 12:26:42,956 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 591 selfloop transitions, 52 changer transitions 0/646 dead transitions. [2024-06-14 12:26:42,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 646 transitions, 10044 flow [2024-06-14 12:26:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:26:42,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:26:42,957 INFO L175 Difference]: Start difference. First operand has 372 places, 628 transitions, 8472 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:26:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 646 transitions, 10044 flow [2024-06-14 12:26:46,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 646 transitions, 9905 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 12:26:46,301 INFO L231 Difference]: Finished difference. Result has 371 places, 631 transitions, 8489 flow [2024-06-14 12:26:46,301 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} [2024-06-14 12:26:46,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 12:26:46,301 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 631 transitions, 8489 flow [2024-06-14 12:26:46,301 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) [2024-06-14 12:26:46,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:46,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:46,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:26:46,302 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)] === [2024-06-14 12:26:46,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1987233525, now seen corresponding path program 6 times [2024-06-14 12:26:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936815711] [2024-06-14 12:26:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:47,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936815711] [2024-06-14 12:26:47,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936815711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:47,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:47,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82262028] [2024-06-14 12:26:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:47,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:47,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:47,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:26:47,244 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) [2024-06-14 12:26:47,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:47,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:26:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:49,922 INFO L124 PetriNetUnfolderBase]: 6821/10716 cut-off events. [2024-06-14 12:26:49,922 INFO L125 PetriNetUnfolderBase]: For 1070782/1070785 co-relation queries the response was YES. [2024-06-14 12:26:50,055 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. [2024-06-14 12:26:50,100 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 586 selfloop transitions, 55 changer transitions 0/644 dead transitions. [2024-06-14 12:26:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 644 transitions, 9825 flow [2024-06-14 12:26:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:26:50,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:26:50,101 INFO L175 Difference]: Start difference. First operand has 371 places, 631 transitions, 8489 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:26:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 644 transitions, 9825 flow [2024-06-14 12:26:53,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 644 transitions, 9673 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:53,799 INFO L231 Difference]: Finished difference. Result has 374 places, 631 transitions, 8453 flow [2024-06-14 12:26:53,799 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} [2024-06-14 12:26:53,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 12:26:53,800 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 631 transitions, 8453 flow [2024-06-14 12:26:53,800 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) [2024-06-14 12:26:53,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:53,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:53,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:26:53,801 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)] === [2024-06-14 12:26:53,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1670492394, now seen corresponding path program 1 times [2024-06-14 12:26:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:53,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701323811] [2024-06-14 12:26:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:54,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701323811] [2024-06-14 12:26:54,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701323811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:54,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:54,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:54,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003463197] [2024-06-14 12:26:54,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:54,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:54,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:54,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:54,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:26:54,806 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) [2024-06-14 12:26:54,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:54,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:26:54,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:57,266 INFO L124 PetriNetUnfolderBase]: 6718/10611 cut-off events. [2024-06-14 12:26:57,266 INFO L125 PetriNetUnfolderBase]: For 1106391/1106405 co-relation queries the response was YES. [2024-06-14 12:26:57,383 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. [2024-06-14 12:26:57,428 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 107 changer transitions 0/667 dead transitions. [2024-06-14 12:26:57,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 667 transitions, 10145 flow [2024-06-14 12:26:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:26:57,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:26:57,430 INFO L175 Difference]: Start difference. First operand has 374 places, 631 transitions, 8453 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:26:57,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 667 transitions, 10145 flow [2024-06-14 12:27:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 667 transitions, 10011 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:27:00,936 INFO L231 Difference]: Finished difference. Result has 376 places, 636 transitions, 8655 flow [2024-06-14 12:27:00,936 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} [2024-06-14 12:27:00,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 12:27:00,936 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 636 transitions, 8655 flow [2024-06-14 12:27:00,937 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) [2024-06-14 12:27:00,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:00,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:27:00,937 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)] === [2024-06-14 12:27:00,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1305700274, now seen corresponding path program 2 times [2024-06-14 12:27:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:00,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573501437] [2024-06-14 12:27:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:01,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573501437] [2024-06-14 12:27:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573501437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:01,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170799343] [2024-06-14 12:27:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:01,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:01,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:01,989 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) [2024-06-14 12:27:01,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:01,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:01,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:04,534 INFO L124 PetriNetUnfolderBase]: 6743/10648 cut-off events. [2024-06-14 12:27:04,534 INFO L125 PetriNetUnfolderBase]: For 1131022/1131034 co-relation queries the response was YES. [2024-06-14 12:27:04,666 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. [2024-06-14 12:27:04,715 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 549 selfloop transitions, 107 changer transitions 0/675 dead transitions. [2024-06-14 12:27:04,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 675 transitions, 10454 flow [2024-06-14 12:27:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:27:04,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:27:04,716 INFO L175 Difference]: Start difference. First operand has 376 places, 636 transitions, 8655 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:27:04,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 675 transitions, 10454 flow [2024-06-14 12:27:07,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 675 transitions, 10222 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:07,642 INFO L231 Difference]: Finished difference. Result has 381 places, 642 transitions, 8792 flow [2024-06-14 12:27:07,643 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} [2024-06-14 12:27:07,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 12:27:07,643 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 642 transitions, 8792 flow [2024-06-14 12:27:07,643 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) [2024-06-14 12:27:07,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:07,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:07,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:27:07,644 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)] === [2024-06-14 12:27:07,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1320746124, now seen corresponding path program 1 times [2024-06-14 12:27:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:07,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405699517] [2024-06-14 12:27:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:07,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:08,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:08,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405699517] [2024-06-14 12:27:08,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405699517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:08,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:08,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:08,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233318628] [2024-06-14 12:27:08,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:08,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:08,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:08,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:27:08,575 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) [2024-06-14 12:27:08,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:08,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:27:08,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:11,195 INFO L124 PetriNetUnfolderBase]: 6873/10785 cut-off events. [2024-06-14 12:27:11,195 INFO L125 PetriNetUnfolderBase]: For 1139188/1139192 co-relation queries the response was YES. [2024-06-14 12:27:11,340 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. [2024-06-14 12:27:11,393 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 574 selfloop transitions, 115 changer transitions 0/692 dead transitions. [2024-06-14 12:27:11,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 692 transitions, 10766 flow [2024-06-14 12:27:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:27:11,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:27:11,395 INFO L175 Difference]: Start difference. First operand has 381 places, 642 transitions, 8792 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:27:11,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 692 transitions, 10766 flow [2024-06-14 12:27:15,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 692 transitions, 10616 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:15,241 INFO L231 Difference]: Finished difference. Result has 385 places, 663 transitions, 9173 flow [2024-06-14 12:27:15,241 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} [2024-06-14 12:27:15,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 12:27:15,242 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 663 transitions, 9173 flow [2024-06-14 12:27:15,242 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) [2024-06-14 12:27:15,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:15,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:27:15,242 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)] === [2024-06-14 12:27:15,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1320736514, now seen corresponding path program 3 times [2024-06-14 12:27:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62389390] [2024-06-14 12:27:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:16,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62389390] [2024-06-14 12:27:16,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62389390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:16,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749762709] [2024-06-14 12:27:16,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:16,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:16,304 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) [2024-06-14 12:27:16,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:16,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:16,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:18,855 INFO L124 PetriNetUnfolderBase]: 6776/10686 cut-off events. [2024-06-14 12:27:18,855 INFO L125 PetriNetUnfolderBase]: For 1168482/1168487 co-relation queries the response was YES. [2024-06-14 12:27:18,982 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. [2024-06-14 12:27:19,030 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 560 selfloop transitions, 102 changer transitions 0/690 dead transitions. [2024-06-14 12:27:19,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 690 transitions, 10639 flow [2024-06-14 12:27:19,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:27:19,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:27:19,031 INFO L175 Difference]: Start difference. First operand has 385 places, 663 transitions, 9173 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:27:19,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 690 transitions, 10639 flow [2024-06-14 12:27:23,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 690 transitions, 10521 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:23,241 INFO L231 Difference]: Finished difference. Result has 390 places, 663 transitions, 9267 flow [2024-06-14 12:27:23,241 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} [2024-06-14 12:27:23,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 12:27:23,242 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 663 transitions, 9267 flow [2024-06-14 12:27:23,242 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) [2024-06-14 12:27:23,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:23,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:27:23,242 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)] === [2024-06-14 12:27:23,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 65360630, now seen corresponding path program 1 times [2024-06-14 12:27:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775910250] [2024-06-14 12:27:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775910250] [2024-06-14 12:27:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775910250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:23,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:23,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81483219] [2024-06-14 12:27:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:23,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:23,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:23,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:24,018 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) [2024-06-14 12:27:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:24,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:26,676 INFO L124 PetriNetUnfolderBase]: 6805/10725 cut-off events. [2024-06-14 12:27:26,676 INFO L125 PetriNetUnfolderBase]: For 1201892/1201897 co-relation queries the response was YES. [2024-06-14 12:27:26,802 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. [2024-06-14 12:27:26,850 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 594 selfloop transitions, 98 changer transitions 0/720 dead transitions. [2024-06-14 12:27:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 720 transitions, 11795 flow [2024-06-14 12:27:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:27:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:27:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-14 12:27:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-14 12:27:26,852 INFO L175 Difference]: Start difference. First operand has 390 places, 663 transitions, 9267 flow. Second operand 11 states and 199 transitions. [2024-06-14 12:27:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 720 transitions, 11795 flow [2024-06-14 12:27:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 720 transitions, 11610 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:30,929 INFO L231 Difference]: Finished difference. Result has 397 places, 685 transitions, 9786 flow [2024-06-14 12:27:30,929 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} [2024-06-14 12:27:30,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 12:27:30,929 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 685 transitions, 9786 flow [2024-06-14 12:27:30,929 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) [2024-06-14 12:27:30,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:30,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:30,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:27:30,930 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)] === [2024-06-14 12:27:30,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2057332022, now seen corresponding path program 2 times [2024-06-14 12:27:30,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:30,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552910239] [2024-06-14 12:27:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:30,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:31,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:31,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552910239] [2024-06-14 12:27:31,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552910239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:31,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:31,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422162949] [2024-06-14 12:27:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:31,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:31,791 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) [2024-06-14 12:27:31,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:31,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:31,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:34,615 INFO L124 PetriNetUnfolderBase]: 6802/10721 cut-off events. [2024-06-14 12:27:34,615 INFO L125 PetriNetUnfolderBase]: For 1225454/1225459 co-relation queries the response was YES. [2024-06-14 12:27:34,767 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. [2024-06-14 12:27:34,818 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 588 selfloop transitions, 103 changer transitions 0/719 dead transitions. [2024-06-14 12:27:34,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 719 transitions, 11688 flow [2024-06-14 12:27:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:27:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:27:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-14 12:27:34,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 12:27:34,820 INFO L175 Difference]: Start difference. First operand has 397 places, 685 transitions, 9786 flow. Second operand 12 states and 207 transitions. [2024-06-14 12:27:34,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 719 transitions, 11688 flow [2024-06-14 12:27:39,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 719 transitions, 11468 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-06-14 12:27:39,014 INFO L231 Difference]: Finished difference. Result has 406 places, 685 transitions, 9780 flow [2024-06-14 12:27:39,015 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} [2024-06-14 12:27:39,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 12:27:39,015 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 685 transitions, 9780 flow [2024-06-14 12:27:39,015 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) [2024-06-14 12:27:39,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:39,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:27:39,016 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)] === [2024-06-14 12:27:39,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2110258320, now seen corresponding path program 3 times [2024-06-14 12:27:39,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:39,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335184386] [2024-06-14 12:27:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:39,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:39,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335184386] [2024-06-14 12:27:39,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335184386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:39,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:39,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:39,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366492654] [2024-06-14 12:27:39,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:39,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:39,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:39,864 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) [2024-06-14 12:27:39,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:39,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:39,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:42,416 INFO L124 PetriNetUnfolderBase]: 6826/10754 cut-off events. [2024-06-14 12:27:42,416 INFO L125 PetriNetUnfolderBase]: For 1248525/1248529 co-relation queries the response was YES. [2024-06-14 12:27:42,559 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. [2024-06-14 12:27:42,608 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 605 selfloop transitions, 92 changer transitions 0/725 dead transitions. [2024-06-14 12:27:42,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 725 transitions, 11668 flow [2024-06-14 12:27:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:27:42,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:27:42,609 INFO L175 Difference]: Start difference. First operand has 406 places, 685 transitions, 9780 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:27:42,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 725 transitions, 11668 flow [2024-06-14 12:27:46,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 725 transitions, 11452 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:46,474 INFO L231 Difference]: Finished difference. Result has 409 places, 700 transitions, 10017 flow [2024-06-14 12:27:46,474 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} [2024-06-14 12:27:46,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:27:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 700 transitions, 10017 flow [2024-06-14 12:27:46,475 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) [2024-06-14 12:27:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:27:46,475 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)] === [2024-06-14 12:27:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash -883200196, now seen corresponding path program 4 times [2024-06-14 12:27:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117590669] [2024-06-14 12:27:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:47,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117590669] [2024-06-14 12:27:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117590669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:47,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:47,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582017015] [2024-06-14 12:27:47,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:47,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:47,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:47,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:47,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:47,328 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) [2024-06-14 12:27:47,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:47,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:47,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:50,011 INFO L124 PetriNetUnfolderBase]: 6831/10761 cut-off events. [2024-06-14 12:27:50,012 INFO L125 PetriNetUnfolderBase]: For 1266607/1266611 co-relation queries the response was YES. [2024-06-14 12:27:50,164 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. [2024-06-14 12:27:50,212 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 604 selfloop transitions, 98 changer transitions 0/730 dead transitions. [2024-06-14 12:27:50,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 730 transitions, 11772 flow [2024-06-14 12:27:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:27:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:27:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 12:27:50,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 12:27:50,214 INFO L175 Difference]: Start difference. First operand has 409 places, 700 transitions, 10017 flow. Second operand 11 states and 191 transitions. [2024-06-14 12:27:50,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 730 transitions, 11772 flow [2024-06-14 12:27:53,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 730 transitions, 11638 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:53,682 INFO L231 Difference]: Finished difference. Result has 415 places, 703 transitions, 10149 flow [2024-06-14 12:27:53,683 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} [2024-06-14 12:27:53,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 12:27:53,683 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 703 transitions, 10149 flow [2024-06-14 12:27:53,683 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) [2024-06-14 12:27:53,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:53,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:27:53,684 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)] === [2024-06-14 12:27:53,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2040751220, now seen corresponding path program 5 times [2024-06-14 12:27:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:53,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95695581] [2024-06-14 12:27:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95695581] [2024-06-14 12:27:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95695581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:54,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:54,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:27:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298631971] [2024-06-14 12:27:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:27:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:27:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:27:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:27:54,565 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) [2024-06-14 12:27:54,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:54,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:27:54,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:57,279 INFO L124 PetriNetUnfolderBase]: 6852/10785 cut-off events. [2024-06-14 12:27:57,280 INFO L125 PetriNetUnfolderBase]: For 1300952/1300960 co-relation queries the response was YES. [2024-06-14 12:27:57,424 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. [2024-06-14 12:27:57,474 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 558 selfloop transitions, 161 changer transitions 0/747 dead transitions. [2024-06-14 12:27:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 747 transitions, 12836 flow [2024-06-14 12:27:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:27:57,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:27:57,475 INFO L175 Difference]: Start difference. First operand has 415 places, 703 transitions, 10149 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:27:57,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 747 transitions, 12836 flow [2024-06-14 12:28:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 747 transitions, 12608 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 12:28:01,069 INFO L231 Difference]: Finished difference. Result has 416 places, 718 transitions, 10641 flow [2024-06-14 12:28:01,069 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} [2024-06-14 12:28:01,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 12:28:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 718 transitions, 10641 flow [2024-06-14 12:28:01,070 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) [2024-06-14 12:28:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:01,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:01,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:28:01,070 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)] === [2024-06-14 12:28:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2040929966, now seen corresponding path program 1 times [2024-06-14 12:28:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409595442] [2024-06-14 12:28:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409595442] [2024-06-14 12:28:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409595442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:01,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299614581] [2024-06-14 12:28:01,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:01,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:01,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:01,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:01,946 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) [2024-06-14 12:28:01,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:01,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:01,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:04,713 INFO L124 PetriNetUnfolderBase]: 6862/10801 cut-off events. [2024-06-14 12:28:04,714 INFO L125 PetriNetUnfolderBase]: For 1335710/1335717 co-relation queries the response was YES. [2024-06-14 12:28:04,877 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. [2024-06-14 12:28:04,934 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 674 selfloop transitions, 54 changer transitions 0/756 dead transitions. [2024-06-14 12:28:04,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 756 transitions, 12371 flow [2024-06-14 12:28:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:28:04,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:28:04,935 INFO L175 Difference]: Start difference. First operand has 416 places, 718 transitions, 10641 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:28:04,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 756 transitions, 12371 flow [2024-06-14 12:28:09,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 756 transitions, 12148 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:09,829 INFO L231 Difference]: Finished difference. Result has 424 places, 728 transitions, 10737 flow [2024-06-14 12:28:09,829 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} [2024-06-14 12:28:09,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 12:28:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 728 transitions, 10737 flow [2024-06-14 12:28:09,829 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) [2024-06-14 12:28:09,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:09,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:28:09,830 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)] === [2024-06-14 12:28:09,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2041050122, now seen corresponding path program 1 times [2024-06-14 12:28:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:09,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590010844] [2024-06-14 12:28:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:09,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590010844] [2024-06-14 12:28:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590010844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:10,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980107216] [2024-06-14 12:28:10,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:10,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:10,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:10,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:10,680 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) [2024-06-14 12:28:10,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:10,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:10,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:13,871 INFO L124 PetriNetUnfolderBase]: 6979/10925 cut-off events. [2024-06-14 12:28:13,871 INFO L125 PetriNetUnfolderBase]: For 1355047/1355054 co-relation queries the response was YES. [2024-06-14 12:28:13,995 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. [2024-06-14 12:28:14,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 676 selfloop transitions, 87 changer transitions 0/766 dead transitions. [2024-06-14 12:28:14,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 766 transitions, 13178 flow [2024-06-14 12:28:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:28:14,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:28:14,044 INFO L175 Difference]: Start difference. First operand has 424 places, 728 transitions, 10737 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:28:14,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 766 transitions, 13178 flow [2024-06-14 12:28:18,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 766 transitions, 13061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:18,633 INFO L231 Difference]: Finished difference. Result has 428 places, 741 transitions, 11015 flow [2024-06-14 12:28:18,633 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} [2024-06-14 12:28:18,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 12:28:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 741 transitions, 11015 flow [2024-06-14 12:28:18,634 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) [2024-06-14 12:28:18,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:18,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:28:18,636 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)] === [2024-06-14 12:28:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2041049750, now seen corresponding path program 6 times [2024-06-14 12:28:18,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:18,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156792461] [2024-06-14 12:28:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:19,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156792461] [2024-06-14 12:28:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156792461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:19,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:19,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121403614] [2024-06-14 12:28:19,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:19,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:19,551 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) [2024-06-14 12:28:19,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:19,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:22,522 INFO L124 PetriNetUnfolderBase]: 6898/10845 cut-off events. [2024-06-14 12:28:22,523 INFO L125 PetriNetUnfolderBase]: For 1388527/1388535 co-relation queries the response was YES. [2024-06-14 12:28:22,672 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. [2024-06-14 12:28:22,722 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 167 changer transitions 0/769 dead transitions. [2024-06-14 12:28:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 769 transitions, 13245 flow [2024-06-14 12:28:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:28:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:28:22,723 INFO L175 Difference]: Start difference. First operand has 428 places, 741 transitions, 11015 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:28:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 769 transitions, 13245 flow [2024-06-14 12:28:27,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 769 transitions, 13126 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 12:28:27,522 INFO L231 Difference]: Finished difference. Result has 434 places, 744 transitions, 11280 flow [2024-06-14 12:28:27,522 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} [2024-06-14 12:28:27,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 12:28:27,523 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 744 transitions, 11280 flow [2024-06-14 12:28:27,523 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) [2024-06-14 12:28:27,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:27,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:27,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:28:27,523 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)] === [2024-06-14 12:28:27,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:27,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2041049936, now seen corresponding path program 2 times [2024-06-14 12:28:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362010282] [2024-06-14 12:28:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:27,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:28,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362010282] [2024-06-14 12:28:28,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362010282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:28,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:28,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499163471] [2024-06-14 12:28:28,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:28,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:28,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:28,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:28,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:28,405 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) [2024-06-14 12:28:28,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:28,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:28,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:31,276 INFO L124 PetriNetUnfolderBase]: 6936/10901 cut-off events. [2024-06-14 12:28:31,276 INFO L125 PetriNetUnfolderBase]: For 1441516/1441523 co-relation queries the response was YES. [2024-06-14 12:28:31,424 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. [2024-06-14 12:28:31,474 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 668 selfloop transitions, 92 changer transitions 0/792 dead transitions. [2024-06-14 12:28:31,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 792 transitions, 13839 flow [2024-06-14 12:28:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:28:31,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:28:31,475 INFO L175 Difference]: Start difference. First operand has 434 places, 744 transitions, 11280 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:28:31,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 792 transitions, 13839 flow [2024-06-14 12:28:37,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 792 transitions, 13527 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:37,453 INFO L231 Difference]: Finished difference. Result has 439 places, 763 transitions, 11536 flow [2024-06-14 12:28:37,453 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} [2024-06-14 12:28:37,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 12:28:37,454 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 763 transitions, 11536 flow [2024-06-14 12:28:37,454 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) [2024-06-14 12:28:37,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:28:37,454 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)] === [2024-06-14 12:28:37,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -748462202, now seen corresponding path program 2 times [2024-06-14 12:28:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684600361] [2024-06-14 12:28:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:38,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:38,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684600361] [2024-06-14 12:28:38,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684600361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:38,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:38,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:38,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285502443] [2024-06-14 12:28:38,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:38,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:38,228 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) [2024-06-14 12:28:38,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:38,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:38,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:41,208 INFO L124 PetriNetUnfolderBase]: 7031/10998 cut-off events. [2024-06-14 12:28:41,209 INFO L125 PetriNetUnfolderBase]: For 1465673/1465680 co-relation queries the response was YES. [2024-06-14 12:28:41,363 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. [2024-06-14 12:28:41,417 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 689 selfloop transitions, 95 changer transitions 0/787 dead transitions. [2024-06-14 12:28:41,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 787 transitions, 13632 flow [2024-06-14 12:28:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:28:41,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:28:41,418 INFO L175 Difference]: Start difference. First operand has 439 places, 763 transitions, 11536 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:28:41,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 787 transitions, 13632 flow [2024-06-14 12:28:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 787 transitions, 13526 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-14 12:28:46,816 INFO L231 Difference]: Finished difference. Result has 446 places, 766 transitions, 11661 flow [2024-06-14 12:28:46,817 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} [2024-06-14 12:28:46,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-14 12:28:46,817 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 766 transitions, 11661 flow [2024-06-14 12:28:46,817 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) [2024-06-14 12:28:46,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:46,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:46,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:28:46,818 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)] === [2024-06-14 12:28:46,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:46,819 INFO L85 PathProgramCache]: Analyzing trace with hash -768682600, now seen corresponding path program 3 times [2024-06-14 12:28:46,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:46,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480938110] [2024-06-14 12:28:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:46,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480938110] [2024-06-14 12:28:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480938110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:47,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:47,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:47,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968140113] [2024-06-14 12:28:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:47,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:28:47,702 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) [2024-06-14 12:28:47,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:47,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:28:47,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:50,922 INFO L124 PetriNetUnfolderBase]: 6935/10902 cut-off events. [2024-06-14 12:28:50,922 INFO L125 PetriNetUnfolderBase]: For 1489180/1489187 co-relation queries the response was YES. [2024-06-14 12:28:51,083 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. [2024-06-14 12:28:51,137 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 660 selfloop transitions, 97 changer transitions 0/790 dead transitions. [2024-06-14 12:28:51,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 790 transitions, 13703 flow [2024-06-14 12:28:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:28:51,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:28:51,138 INFO L175 Difference]: Start difference. First operand has 446 places, 766 transitions, 11661 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:28:51,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 790 transitions, 13703 flow [2024-06-14 12:28:57,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 790 transitions, 13456 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:57,804 INFO L231 Difference]: Finished difference. Result has 449 places, 766 transitions, 11620 flow [2024-06-14 12:28:57,805 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} [2024-06-14 12:28:57,805 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-14 12:28:57,805 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 766 transitions, 11620 flow [2024-06-14 12:28:57,805 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) [2024-06-14 12:28:57,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:57,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:57,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:28:57,806 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)] === [2024-06-14 12:28:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2076785654, now seen corresponding path program 3 times [2024-06-14 12:28:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:57,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921857037] [2024-06-14 12:28:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:58,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:58,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921857037] [2024-06-14 12:28:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921857037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:58,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:58,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:28:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253455592] [2024-06-14 12:28:58,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:58,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:28:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:58,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:28:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:28:58,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:28:58,660 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) [2024-06-14 12:28:58,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:58,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:28:58,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:02,345 INFO L124 PetriNetUnfolderBase]: 7022/10986 cut-off events. [2024-06-14 12:29:02,346 INFO L125 PetriNetUnfolderBase]: For 1497315/1497322 co-relation queries the response was YES. [2024-06-14 12:29:02,495 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. [2024-06-14 12:29:02,545 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 692 selfloop transitions, 92 changer transitions 0/787 dead transitions. [2024-06-14 12:29:02,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 787 transitions, 13690 flow [2024-06-14 12:29:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:29:02,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:29:02,546 INFO L175 Difference]: Start difference. First operand has 449 places, 766 transitions, 11620 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:29:02,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 787 transitions, 13690 flow [2024-06-14 12:29:07,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 787 transitions, 13475 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:07,248 INFO L231 Difference]: Finished difference. Result has 451 places, 766 transitions, 11595 flow [2024-06-14 12:29:07,249 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} [2024-06-14 12:29:07,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:29:07,249 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 766 transitions, 11595 flow [2024-06-14 12:29:07,249 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) [2024-06-14 12:29:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:07,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:07,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:29:07,250 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)] === [2024-06-14 12:29:07,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2045691380, now seen corresponding path program 7 times [2024-06-14 12:29:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102776054] [2024-06-14 12:29:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:08,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:08,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102776054] [2024-06-14 12:29:08,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102776054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:08,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:08,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560944070] [2024-06-14 12:29:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:08,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:08,142 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) [2024-06-14 12:29:08,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:08,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:08,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:11,709 INFO L124 PetriNetUnfolderBase]: 6929/10889 cut-off events. [2024-06-14 12:29:11,709 INFO L125 PetriNetUnfolderBase]: For 1520456/1520464 co-relation queries the response was YES. [2024-06-14 12:29:11,843 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. [2024-06-14 12:29:11,892 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 583 selfloop transitions, 172 changer transitions 0/788 dead transitions. [2024-06-14 12:29:11,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 788 transitions, 13827 flow [2024-06-14 12:29:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:29:11,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:29:11,894 INFO L175 Difference]: Start difference. First operand has 451 places, 766 transitions, 11595 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:29:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 788 transitions, 13827 flow [2024-06-14 12:29:18,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 788 transitions, 13631 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:18,129 INFO L231 Difference]: Finished difference. Result has 453 places, 766 transitions, 11749 flow [2024-06-14 12:29:18,148 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} [2024-06-14 12:29:18,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 12:29:18,150 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 766 transitions, 11749 flow [2024-06-14 12:29:18,150 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) [2024-06-14 12:29:18,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:18,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:29:18,152 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)] === [2024-06-14 12:29:18,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2076905996, now seen corresponding path program 8 times [2024-06-14 12:29:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3872622] [2024-06-14 12:29:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:18,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3872622] [2024-06-14 12:29:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3872622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710161557] [2024-06-14 12:29:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:19,140 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) [2024-06-14 12:29:19,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:19,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:22,573 INFO L124 PetriNetUnfolderBase]: 6926/10891 cut-off events. [2024-06-14 12:29:22,574 INFO L125 PetriNetUnfolderBase]: For 1540440/1540445 co-relation queries the response was YES. [2024-06-14 12:29:22,704 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. [2024-06-14 12:29:22,749 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 77 changer transitions 0/785 dead transitions. [2024-06-14 12:29:22,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 785 transitions, 13327 flow [2024-06-14 12:29:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:29:22,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:29:22,751 INFO L175 Difference]: Start difference. First operand has 453 places, 766 transitions, 11749 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:29:22,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 785 transitions, 13327 flow [2024-06-14 12:29:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 785 transitions, 13003 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:28,663 INFO L231 Difference]: Finished difference. Result has 456 places, 766 transitions, 11586 flow [2024-06-14 12:29:28,663 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} [2024-06-14 12:29:28,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-14 12:29:28,664 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 766 transitions, 11586 flow [2024-06-14 12:29:28,664 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) [2024-06-14 12:29:28,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:28,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:29:28,665 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)] === [2024-06-14 12:29:28,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1999309448, now seen corresponding path program 4 times [2024-06-14 12:29:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632436049] [2024-06-14 12:29:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:28,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:29,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632436049] [2024-06-14 12:29:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632436049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:29,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:29,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:29,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700395595] [2024-06-14 12:29:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:29,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:29,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:29,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:29,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:29,823 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) [2024-06-14 12:29:29,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:29,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:29,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:33,303 INFO L124 PetriNetUnfolderBase]: 6971/10962 cut-off events. [2024-06-14 12:29:33,303 INFO L125 PetriNetUnfolderBase]: For 1584935/1584939 co-relation queries the response was YES. [2024-06-14 12:29:33,430 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. [2024-06-14 12:29:33,474 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 674 selfloop transitions, 103 changer transitions 0/810 dead transitions. [2024-06-14 12:29:33,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 810 transitions, 13601 flow [2024-06-14 12:29:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:29:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:29:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:29:33,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 12:29:33,475 INFO L175 Difference]: Start difference. First operand has 456 places, 766 transitions, 11586 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:29:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 810 transitions, 13601 flow [2024-06-14 12:29:39,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 810 transitions, 13396 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 12:29:39,495 INFO L231 Difference]: Finished difference. Result has 457 places, 776 transitions, 11743 flow [2024-06-14 12:29:39,495 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} [2024-06-14 12:29:39,496 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 12:29:39,496 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 776 transitions, 11743 flow [2024-06-14 12:29:39,496 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) [2024-06-14 12:29:39,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:39,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:39,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:29:39,496 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)] === [2024-06-14 12:29:39,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1922839434, now seen corresponding path program 2 times [2024-06-14 12:29:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484160407] [2024-06-14 12:29:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:39,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484160407] [2024-06-14 12:29:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484160407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141448017] [2024-06-14 12:29:40,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:40,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:40,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:40,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:29:40,482 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) [2024-06-14 12:29:40,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:40,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:29:40,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:43,906 INFO L124 PetriNetUnfolderBase]: 7089/11089 cut-off events. [2024-06-14 12:29:43,906 INFO L125 PetriNetUnfolderBase]: For 1606200/1606204 co-relation queries the response was YES. [2024-06-14 12:29:44,062 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. [2024-06-14 12:29:44,118 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 697 selfloop transitions, 120 changer transitions 0/820 dead transitions. [2024-06-14 12:29:44,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 820 transitions, 13896 flow [2024-06-14 12:29:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:29:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:29:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:29:44,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:29:44,120 INFO L175 Difference]: Start difference. First operand has 457 places, 776 transitions, 11743 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:29:44,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 820 transitions, 13896 flow [2024-06-14 12:29:49,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 820 transitions, 13773 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:49,812 INFO L231 Difference]: Finished difference. Result has 461 places, 792 transitions, 12072 flow [2024-06-14 12:29:49,812 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} [2024-06-14 12:29:49,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 12:29:49,813 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 792 transitions, 12072 flow [2024-06-14 12:29:49,813 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) [2024-06-14 12:29:49,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:49,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:49,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:29:49,813 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)] === [2024-06-14 12:29:49,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:49,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1922839124, now seen corresponding path program 5 times [2024-06-14 12:29:49,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:49,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330499371] [2024-06-14 12:29:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:49,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330499371] [2024-06-14 12:29:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330499371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:50,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:50,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194547794] [2024-06-14 12:29:50,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:50,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:50,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:29:50,869 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) [2024-06-14 12:29:50,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:50,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:29:50,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:54,286 INFO L124 PetriNetUnfolderBase]: 7012/11020 cut-off events. [2024-06-14 12:29:54,287 INFO L125 PetriNetUnfolderBase]: For 1643562/1643566 co-relation queries the response was YES. [2024-06-14 12:29:54,425 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. [2024-06-14 12:29:54,653 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 693 selfloop transitions, 93 changer transitions 0/824 dead transitions. [2024-06-14 12:29:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 824 transitions, 13815 flow [2024-06-14 12:29:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:29:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:29:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 12:29:54,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 12:29:54,654 INFO L175 Difference]: Start difference. First operand has 461 places, 792 transitions, 12072 flow. Second operand 10 states and 178 transitions. [2024-06-14 12:29:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 824 transitions, 13815 flow [2024-06-14 12:30:00,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 824 transitions, 13701 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:00,249 INFO L231 Difference]: Finished difference. Result has 467 places, 796 transitions, 12222 flow [2024-06-14 12:30:00,250 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} [2024-06-14 12:30:00,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-14 12:30:00,258 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 796 transitions, 12222 flow [2024-06-14 12:30:00,258 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) [2024-06-14 12:30:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:30:00,258 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)] === [2024-06-14 12:30:00,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1931170994, now seen corresponding path program 6 times [2024-06-14 12:30:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:00,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456485208] [2024-06-14 12:30:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:00,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456485208] [2024-06-14 12:30:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456485208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:01,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554188904] [2024-06-14 12:30:01,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:01,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:30:01,489 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) [2024-06-14 12:30:01,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:01,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:30:01,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:05,003 INFO L124 PetriNetUnfolderBase]: 7022/11031 cut-off events. [2024-06-14 12:30:05,003 INFO L125 PetriNetUnfolderBase]: For 1670807/1670811 co-relation queries the response was YES. [2024-06-14 12:30:05,345 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. [2024-06-14 12:30:05,391 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 703 selfloop transitions, 81 changer transitions 0/822 dead transitions. [2024-06-14 12:30:05,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 822 transitions, 13920 flow [2024-06-14 12:30:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:30:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:30:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:30:05,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:30:05,393 INFO L175 Difference]: Start difference. First operand has 467 places, 796 transitions, 12222 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:30:05,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 822 transitions, 13920 flow [2024-06-14 12:30:11,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 822 transitions, 13722 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:30:11,369 INFO L231 Difference]: Finished difference. Result has 469 places, 798 transitions, 12240 flow [2024-06-14 12:30:11,370 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} [2024-06-14 12:30:11,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-14 12:30:11,370 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 798 transitions, 12240 flow [2024-06-14 12:30:11,370 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) [2024-06-14 12:30:11,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:11,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:11,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:30:11,371 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)] === [2024-06-14 12:30:11,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:11,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1931181534, now seen corresponding path program 3 times [2024-06-14 12:30:11,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:11,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198534294] [2024-06-14 12:30:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:11,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat