./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:47:26,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:47:27,023 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:47:27,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:47:27,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:47:27,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:47:27,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:47:27,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:47:27,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:47:27,061 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:47:27,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:47:27,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:47:27,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:47:27,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:47:27,064 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:47:27,064 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:47:27,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:47:27,064 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:47:27,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:47:27,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:47:27,065 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:47:27,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:47:27,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:47:27,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:47:27,066 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:47:27,066 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:47:27,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:47:27,066 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:47:27,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:47:27,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:47:27,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:47:27,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:47:27,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:47:27,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:47:27,069 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:47:27,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:47:27,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:47:27,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:47:27,070 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:47:27,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:47:27,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:47:27,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:47:27,283 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:47:27,283 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:47:27,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix042.oepc.yml/witness.yml [2024-06-03 19:47:27,505 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:47:27,505 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:47:27,506 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-03 19:47:28,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:47:28,671 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:47:28,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-03 19:47:28,692 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4783acec9/5dcf9117200d4890ba43060c909b8cd1/FLAG3c263f405 [2024-06-03 19:47:28,703 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4783acec9/5dcf9117200d4890ba43060c909b8cd1 [2024-06-03 19:47:28,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:47:28,704 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:47:28,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:47:28,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:47:28,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:47:28,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:47:27" (1/2) ... [2024-06-03 19:47:28,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d146447 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:47:28, skipping insertion in model container [2024-06-03 19:47:28,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:47:27" (1/2) ... [2024-06-03 19:47:28,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40b73d7e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:47:28, skipping insertion in model container [2024-06-03 19:47:28,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:47:28" (2/2) ... [2024-06-03 19:47:28,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d146447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:28, skipping insertion in model container [2024-06-03 19:47:28,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:47:28" (2/2) ... [2024-06-03 19:47:28,712 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:47:28,776 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:47:28,777 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:47:28,777 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:47:28,777 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 19:47:28,777 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:47:28,777 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-03 19:47:28,814 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:47:29,164 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:47:29,173 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:47:29,311 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:47:29,349 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:47:29,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29 WrapperNode [2024-06-03 19:47:29,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:47:29,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:47:29,351 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:47:29,351 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:47:29,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,384 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,417 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-03 19:47:29,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:47:29,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:47:29,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:47:29,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:47:29,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,441 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,467 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:47:29,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:47:29,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:47:29,506 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:47:29,506 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:47:29,507 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (1/1) ... [2024-06-03 19:47:29,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:47:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:47:29,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:47:29,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:47:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:47:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:47:29,584 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:47:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:47:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:47:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:47:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:47:29,585 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:47:29,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:47:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:47:29,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:47:29,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:47:29,587 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:47:29,710 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:47:29,712 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:47:30,013 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:47:30,014 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:47:30,152 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:47:30,153 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:47:30,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:47:30 BoogieIcfgContainer [2024-06-03 19:47:30,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:47:30,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:47:30,155 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:47:30,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:47:30,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:47:27" (1/4) ... [2024-06-03 19:47:30,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680b6b18 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:47:30, skipping insertion in model container [2024-06-03 19:47:30,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:47:28" (2/4) ... [2024-06-03 19:47:30,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680b6b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:47:30, skipping insertion in model container [2024-06-03 19:47:30,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:47:29" (3/4) ... [2024-06-03 19:47:30,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680b6b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:47:30, skipping insertion in model container [2024-06-03 19:47:30,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:47:30" (4/4) ... [2024-06-03 19:47:30,159 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.oepc.i [2024-06-03 19:47:30,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:47:30,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:47:30,171 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:47:30,203 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:47:30,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:47:30,244 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:47:30,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:47:30,246 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 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:47:30,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:47:30,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:47:30,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:47:30,285 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;@2d8114f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:47:30,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:47:30,289 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:47:30,289 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 19:47:30,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:47:30,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:30,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:47:30,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:30,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:30,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1196790123, now seen corresponding path program 1 times [2024-06-03 19:47:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949696880] [2024-06-03 19:47:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:30,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949696880] [2024-06-03 19:47:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949696880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:31,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:47:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832305319] [2024-06-03 19:47:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:31,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:47:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:47:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:47:31,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:31,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:31,693 INFO L124 PetriNetUnfolderBase]: 1566/2407 cut-off events. [2024-06-03 19:47:31,693 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 19:47:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 2407 events. 1566/2407 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11613 event pairs, 1097 based on Foata normal form. 1/2345 useless extension candidates. Maximal degree in co-relation 4805. Up to 2326 conditions per place. [2024-06-03 19:47:31,711 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:47:31,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-03 19:47:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:47:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:47:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-03 19:47:31,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-03 19:47:31,723 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 75 transitions. [2024-06-03 19:47:31,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-03 19:47:31,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:31,728 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:47:31,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:47:31,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:47:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:47:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:31,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:31,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:31,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:47:31,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:31,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:31,735 INFO L85 PathProgramCache]: Analyzing trace with hash 935955316, now seen corresponding path program 1 times [2024-06-03 19:47:31,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:31,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498536875] [2024-06-03 19:47:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:31,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498536875] [2024-06-03 19:47:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498536875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:32,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:32,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:47:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291856525] [2024-06-03 19:47:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:32,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:47:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:47:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:47:32,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:47:32,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:47:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:32,651 INFO L124 PetriNetUnfolderBase]: 1560/2398 cut-off events. [2024-06-03 19:47:32,651 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-03 19:47:32,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 2398 events. 1560/2398 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11610 event pairs, 930 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 5401. Up to 2302 conditions per place. [2024-06-03 19:47:32,661 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 19:47:32,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2024-06-03 19:47:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:47:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:47:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 19:47:32,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-03 19:47:32,663 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-06-03 19:47:32,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2024-06-03 19:47:32,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:47:32,666 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:47:32,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:47:32,667 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:47:32,667 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:47:32,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:32,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:32,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:32,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:47:32,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:32,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:32,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1804923987, now seen corresponding path program 1 times [2024-06-03 19:47:32,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:32,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46585879] [2024-06-03 19:47:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:32,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46585879] [2024-06-03 19:47:33,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46585879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:47:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278218605] [2024-06-03 19:47:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:47:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:47:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:47:33,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:33,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:33,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:33,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:33,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:34,091 INFO L124 PetriNetUnfolderBase]: 1893/2883 cut-off events. [2024-06-03 19:47:34,091 INFO L125 PetriNetUnfolderBase]: For 1453/1453 co-relation queries the response was YES. [2024-06-03 19:47:34,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 2883 events. 1893/2883 cut-off events. For 1453/1453 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13805 event pairs, 878 based on Foata normal form. 3/2850 useless extension candidates. Maximal degree in co-relation 7155. Up to 2753 conditions per place. [2024-06-03 19:47:34,103 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-03 19:47:34,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 382 flow [2024-06-03 19:47:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:47:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:47:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 19:47:34,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155038759689923 [2024-06-03 19:47:34,106 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 133 transitions. [2024-06-03 19:47:34,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 382 flow [2024-06-03 19:47:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 362 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:47:34,109 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-03 19:47:34,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 19:47:34,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-03 19:47:34,110 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-03 19:47:34,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:34,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:34,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:34,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:47:34,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:34,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:34,111 INFO L85 PathProgramCache]: Analyzing trace with hash 118069753, now seen corresponding path program 1 times [2024-06-03 19:47:34,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:34,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355586667] [2024-06-03 19:47:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:35,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:35,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355586667] [2024-06-03 19:47:35,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355586667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:35,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:47:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517805770] [2024-06-03 19:47:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:35,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:47:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:47:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:47:35,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:35,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:35,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:35,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:35,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:35,531 INFO L124 PetriNetUnfolderBase]: 1884/2868 cut-off events. [2024-06-03 19:47:35,531 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-03 19:47:35,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7941 conditions, 2868 events. 1884/2868 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13674 event pairs, 690 based on Foata normal form. 6/2838 useless extension candidates. Maximal degree in co-relation 7922. Up to 2708 conditions per place. [2024-06-03 19:47:35,548 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-03 19:47:35,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 442 flow [2024-06-03 19:47:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 19:47:35,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-03 19:47:35,550 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 149 transitions. [2024-06-03 19:47:35,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 442 flow [2024-06-03 19:47:35,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 414 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:35,556 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-03 19:47:35,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:47:35,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-03 19:47:35,557 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-03 19:47:35,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:35,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:35,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:35,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:47:35,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:35,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:35,558 INFO L85 PathProgramCache]: Analyzing trace with hash -318663339, now seen corresponding path program 1 times [2024-06-03 19:47:35,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:35,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474346399] [2024-06-03 19:47:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:36,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474346399] [2024-06-03 19:47:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474346399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:36,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:36,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:47:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9787613] [2024-06-03 19:47:36,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:47:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:47:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:47:36,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:36,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:36,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:36,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:36,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:36,528 INFO L124 PetriNetUnfolderBase]: 1879/2861 cut-off events. [2024-06-03 19:47:36,528 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-03 19:47:36,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8418 conditions, 2861 events. 1879/2861 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13595 event pairs, 812 based on Foata normal form. 2/2827 useless extension candidates. Maximal degree in co-relation 8398. Up to 2767 conditions per place. [2024-06-03 19:47:36,545 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-03 19:47:36,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 377 flow [2024-06-03 19:47:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:47:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:47:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-03 19:47:36,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:47:36,546 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 93 transitions. [2024-06-03 19:47:36,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 377 flow [2024-06-03 19:47:36,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 338 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:36,550 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-03 19:47:36,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-03 19:47:36,550 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-03 19:47:36,551 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-03 19:47:36,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:36,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:36,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:47:36,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:36,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1288627549, now seen corresponding path program 1 times [2024-06-03 19:47:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:36,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377270091] [2024-06-03 19:47:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:36,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:37,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:37,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377270091] [2024-06-03 19:47:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377270091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:37,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:47:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202540591] [2024-06-03 19:47:37,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:47:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:47:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:47:37,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:37,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:37,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:37,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:37,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:37,872 INFO L124 PetriNetUnfolderBase]: 1883/2868 cut-off events. [2024-06-03 19:47:37,872 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-03 19:47:37,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8978 conditions, 2868 events. 1883/2868 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13583 event pairs, 763 based on Foata normal form. 6/2874 useless extension candidates. Maximal degree in co-relation 8956. Up to 2725 conditions per place. [2024-06-03 19:47:37,887 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-03 19:47:37,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 498 flow [2024-06-03 19:47:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:47:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:47:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 19:47:37,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:47:37,888 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 117 transitions. [2024-06-03 19:47:37,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 498 flow [2024-06-03 19:47:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 476 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:37,892 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 329 flow [2024-06-03 19:47:37,892 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=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-03 19:47:37,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-03 19:47:37,893 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 329 flow [2024-06-03 19:47:37,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:37,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:37,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:37,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:47:37,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1836004428, now seen corresponding path program 1 times [2024-06-03 19:47:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27118320] [2024-06-03 19:47:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:38,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:38,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27118320] [2024-06-03 19:47:38,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27118320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:38,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:47:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849580323] [2024-06-03 19:47:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:47:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:47:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:47:38,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:38,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 329 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:38,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:38,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:38,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:39,023 INFO L124 PetriNetUnfolderBase]: 1894/2919 cut-off events. [2024-06-03 19:47:39,024 INFO L125 PetriNetUnfolderBase]: For 9071/9075 co-relation queries the response was YES. [2024-06-03 19:47:39,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 2919 events. 1894/2919 cut-off events. For 9071/9075 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14036 event pairs, 771 based on Foata normal form. 6/2924 useless extension candidates. Maximal degree in co-relation 10139. Up to 2754 conditions per place. [2024-06-03 19:47:39,046 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-03 19:47:39,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 617 flow [2024-06-03 19:47:39,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:47:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:47:39,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 19:47:39,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:47:39,048 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 329 flow. Second operand 6 states and 116 transitions. [2024-06-03 19:47:39,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 617 flow [2024-06-03 19:47:39,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 601 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 19:47:39,056 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 407 flow [2024-06-03 19:47:39,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-03 19:47:39,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 19:47:39,058 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 407 flow [2024-06-03 19:47:39,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:39,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:39,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:39,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:47:39,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:39,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash -376681642, now seen corresponding path program 2 times [2024-06-03 19:47:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:39,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795264175] [2024-06-03 19:47:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:39,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:39,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795264175] [2024-06-03 19:47:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795264175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:39,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:47:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032257776] [2024-06-03 19:47:39,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:39,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:47:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:39,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:47:39,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:47:39,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:39,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:39,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:39,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:39,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:40,222 INFO L124 PetriNetUnfolderBase]: 1889/2911 cut-off events. [2024-06-03 19:47:40,222 INFO L125 PetriNetUnfolderBase]: For 11512/11512 co-relation queries the response was YES. [2024-06-03 19:47:40,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10764 conditions, 2911 events. 1889/2911 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13968 event pairs, 767 based on Foata normal form. 2/2912 useless extension candidates. Maximal degree in co-relation 10736. Up to 2773 conditions per place. [2024-06-03 19:47:40,237 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-03 19:47:40,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 601 flow [2024-06-03 19:47:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:47:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:47:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 19:47:40,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-03 19:47:40,240 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 407 flow. Second operand 6 states and 109 transitions. [2024-06-03 19:47:40,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 601 flow [2024-06-03 19:47:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 559 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 19:47:40,249 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-03 19:47:40,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-03 19:47:40,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-03 19:47:40,250 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-03 19:47:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:40,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:40,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:47:40,251 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1597946296, now seen corresponding path program 1 times [2024-06-03 19:47:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161330690] [2024-06-03 19:47:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161330690] [2024-06-03 19:47:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161330690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:41,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:41,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:41,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021090763] [2024-06-03 19:47:41,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:41,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:41,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:41,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:41,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:41,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:41,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:41,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:41,652 INFO L124 PetriNetUnfolderBase]: 1900/2927 cut-off events. [2024-06-03 19:47:41,652 INFO L125 PetriNetUnfolderBase]: For 13299/13299 co-relation queries the response was YES. [2024-06-03 19:47:41,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10970 conditions, 2927 events. 1900/2927 cut-off events. For 13299/13299 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14059 event pairs, 746 based on Foata normal form. 2/2928 useless extension candidates. Maximal degree in co-relation 10940. Up to 2768 conditions per place. [2024-06-03 19:47:41,669 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 77 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-03 19:47:41,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 669 flow [2024-06-03 19:47:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:47:41,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:47:41,671 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:47:41,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 669 flow [2024-06-03 19:47:41,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 635 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:41,682 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 431 flow [2024-06-03 19:47:41,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-03 19:47:41,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-03 19:47:41,683 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 431 flow [2024-06-03 19:47:41,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:41,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:41,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:47:41,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:41,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1597826140, now seen corresponding path program 1 times [2024-06-03 19:47:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996757628] [2024-06-03 19:47:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:42,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:42,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996757628] [2024-06-03 19:47:42,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996757628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:42,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:42,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:42,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329330455] [2024-06-03 19:47:42,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:42,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:42,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:42,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:42,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:42,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:42,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:42,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:43,025 INFO L124 PetriNetUnfolderBase]: 1984/3045 cut-off events. [2024-06-03 19:47:43,026 INFO L125 PetriNetUnfolderBase]: For 16924/16924 co-relation queries the response was YES. [2024-06-03 19:47:43,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12031 conditions, 3045 events. 1984/3045 cut-off events. For 16924/16924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14610 event pairs, 682 based on Foata normal form. 6/3051 useless extension candidates. Maximal degree in co-relation 12001. Up to 2747 conditions per place. [2024-06-03 19:47:43,041 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 87 selfloop transitions, 28 changer transitions 0/119 dead transitions. [2024-06-03 19:47:43,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 939 flow [2024-06-03 19:47:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:47:43,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-03 19:47:43,043 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 431 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:47:43,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 939 flow [2024-06-03 19:47:43,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 893 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:43,052 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 606 flow [2024-06-03 19:47:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=606, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-03 19:47:43,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-03 19:47:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 606 flow [2024-06-03 19:47:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:43,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:47:43,054 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:43,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1597826326, now seen corresponding path program 2 times [2024-06-03 19:47:43,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:43,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946770158] [2024-06-03 19:47:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:43,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:43,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946770158] [2024-06-03 19:47:43,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946770158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:43,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:43,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452244486] [2024-06-03 19:47:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:43,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:43,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:43,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:43,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:44,327 INFO L124 PetriNetUnfolderBase]: 1995/3063 cut-off events. [2024-06-03 19:47:44,328 INFO L125 PetriNetUnfolderBase]: For 21859/21863 co-relation queries the response was YES. [2024-06-03 19:47:44,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13523 conditions, 3063 events. 1995/3063 cut-off events. For 21859/21863 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14656 event pairs, 719 based on Foata normal form. 6/3068 useless extension candidates. Maximal degree in co-relation 13489. Up to 2856 conditions per place. [2024-06-03 19:47:44,343 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 87 selfloop transitions, 26 changer transitions 0/117 dead transitions. [2024-06-03 19:47:44,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1008 flow [2024-06-03 19:47:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:47:44,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:47:44,345 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 606 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:47:44,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1008 flow [2024-06-03 19:47:44,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 972 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-03 19:47:44,357 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 712 flow [2024-06-03 19:47:44,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-03 19:47:44,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-03 19:47:44,358 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 712 flow [2024-06-03 19:47:44,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:44,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:44,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:44,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:47:44,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:44,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash -160839662, now seen corresponding path program 2 times [2024-06-03 19:47:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:44,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596691435] [2024-06-03 19:47:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:44,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:45,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:45,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596691435] [2024-06-03 19:47:45,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596691435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:45,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:45,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662080563] [2024-06-03 19:47:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:45,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:45,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 712 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:45,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:45,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:45,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:45,684 INFO L124 PetriNetUnfolderBase]: 2031/3112 cut-off events. [2024-06-03 19:47:45,684 INFO L125 PetriNetUnfolderBase]: For 26534/26534 co-relation queries the response was YES. [2024-06-03 19:47:45,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14383 conditions, 3112 events. 2031/3112 cut-off events. For 26534/26534 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14879 event pairs, 702 based on Foata normal form. 6/3118 useless extension candidates. Maximal degree in co-relation 14346. Up to 2931 conditions per place. [2024-06-03 19:47:45,703 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 96 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-03 19:47:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1096 flow [2024-06-03 19:47:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:47:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:47:45,705 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 712 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:47:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1096 flow [2024-06-03 19:47:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 1044 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:45,723 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 777 flow [2024-06-03 19:47:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=777, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-03 19:47:45,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-03 19:47:45,725 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 777 flow [2024-06-03 19:47:45,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:45,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:45,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:47:45,725 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1420694806, now seen corresponding path program 3 times [2024-06-03 19:47:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:45,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887723006] [2024-06-03 19:47:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:45,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:46,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887723006] [2024-06-03 19:47:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887723006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:46,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826894842] [2024-06-03 19:47:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:46,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:46,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 777 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:46,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:46,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:46,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:47,073 INFO L124 PetriNetUnfolderBase]: 2026/3120 cut-off events. [2024-06-03 19:47:47,073 INFO L125 PetriNetUnfolderBase]: For 30390/30390 co-relation queries the response was YES. [2024-06-03 19:47:47,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14824 conditions, 3120 events. 2026/3120 cut-off events. For 30390/30390 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15083 event pairs, 1020 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 14784. Up to 2960 conditions per place. [2024-06-03 19:47:47,090 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-06-03 19:47:47,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1071 flow [2024-06-03 19:47:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:47:47,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 19:47:47,091 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 777 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:47:47,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1071 flow [2024-06-03 19:47:47,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 119 transitions, 993 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:47,112 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 762 flow [2024-06-03 19:47:47,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-03 19:47:47,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-03 19:47:47,113 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 762 flow [2024-06-03 19:47:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:47,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:47,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:47,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:47:47,114 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:47,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 293486564, now seen corresponding path program 3 times [2024-06-03 19:47:47,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:47,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796970731] [2024-06-03 19:47:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:47,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796970731] [2024-06-03 19:47:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796970731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652793019] [2024-06-03 19:47:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:47,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:47,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:47,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 762 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:47,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:47,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:47,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:48,455 INFO L124 PetriNetUnfolderBase]: 2030/3124 cut-off events. [2024-06-03 19:47:48,455 INFO L125 PetriNetUnfolderBase]: For 33325/33325 co-relation queries the response was YES. [2024-06-03 19:47:48,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14971 conditions, 3124 events. 2030/3124 cut-off events. For 33325/33325 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15084 event pairs, 1012 based on Foata normal form. 6/3130 useless extension candidates. Maximal degree in co-relation 14930. Up to 2870 conditions per place. [2024-06-03 19:47:48,500 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 98 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-03 19:47:48,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 1231 flow [2024-06-03 19:47:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:47:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:47:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:47:48,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:47:48,501 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 762 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:47:48,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 1231 flow [2024-06-03 19:47:48,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1184 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 19:47:48,527 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 881 flow [2024-06-03 19:47:48,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-03 19:47:48,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-03 19:47:48,528 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 881 flow [2024-06-03 19:47:48,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:48,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:48,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:47:48,528 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:48,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash 293732642, now seen corresponding path program 1 times [2024-06-03 19:47:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:48,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215718872] [2024-06-03 19:47:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215718872] [2024-06-03 19:47:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215718872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:49,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251070954] [2024-06-03 19:47:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:49,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:49,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:49,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 881 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:49,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:49,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:49,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:50,159 INFO L124 PetriNetUnfolderBase]: 2033/3128 cut-off events. [2024-06-03 19:47:50,160 INFO L125 PetriNetUnfolderBase]: For 38178/38178 co-relation queries the response was YES. [2024-06-03 19:47:50,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 3128 events. 2033/3128 cut-off events. For 38178/38178 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15101 event pairs, 989 based on Foata normal form. 6/3134 useless extension candidates. Maximal degree in co-relation 15531. Up to 2915 conditions per place. [2024-06-03 19:47:50,178 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-03 19:47:50,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1285 flow [2024-06-03 19:47:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:47:50,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:47:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:47:50,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:47:50,180 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 881 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:47:50,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1285 flow [2024-06-03 19:47:50,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1230 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:50,204 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 932 flow [2024-06-03 19:47:50,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-03 19:47:50,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-03 19:47:50,206 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 932 flow [2024-06-03 19:47:50,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:50,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:50,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:50,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:47:50,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:50,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2030543120, now seen corresponding path program 1 times [2024-06-03 19:47:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704096686] [2024-06-03 19:47:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:50,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:50,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704096686] [2024-06-03 19:47:50,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704096686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:50,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:50,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:47:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096743969] [2024-06-03 19:47:50,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:47:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:47:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:47:50,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:50,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 932 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:50,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:50,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:50,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:51,308 INFO L124 PetriNetUnfolderBase]: 1897/2978 cut-off events. [2024-06-03 19:47:51,308 INFO L125 PetriNetUnfolderBase]: For 40980/40984 co-relation queries the response was YES. [2024-06-03 19:47:51,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15374 conditions, 2978 events. 1897/2978 cut-off events. For 40980/40984 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14826 event pairs, 1003 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 15330. Up to 2769 conditions per place. [2024-06-03 19:47:51,326 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 95 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-06-03 19:47:51,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 118 transitions, 1158 flow [2024-06-03 19:47:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:47:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:47:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-03 19:47:51,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:47:51,327 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 932 flow. Second operand 5 states and 93 transitions. [2024-06-03 19:47:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 118 transitions, 1158 flow [2024-06-03 19:47:51,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 118 transitions, 1068 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:51,352 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 866 flow [2024-06-03 19:47:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-03 19:47:51,352 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-03 19:47:51,352 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 866 flow [2024-06-03 19:47:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:51,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:47:51,353 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:51,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1761917217, now seen corresponding path program 1 times [2024-06-03 19:47:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849315806] [2024-06-03 19:47:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:52,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:52,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849315806] [2024-06-03 19:47:52,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849315806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:52,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:52,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:47:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907849161] [2024-06-03 19:47:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:47:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:47:52,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:47:52,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:52,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 866 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:52,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:52,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:52,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:52,771 INFO L124 PetriNetUnfolderBase]: 2109/3234 cut-off events. [2024-06-03 19:47:52,772 INFO L125 PetriNetUnfolderBase]: For 44954/44958 co-relation queries the response was YES. [2024-06-03 19:47:52,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16742 conditions, 3234 events. 2109/3234 cut-off events. For 44954/44958 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15554 event pairs, 679 based on Foata normal form. 6/3240 useless extension candidates. Maximal degree in co-relation 16697. Up to 2992 conditions per place. [2024-06-03 19:47:52,788 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 37 changer transitions 0/170 dead transitions. [2024-06-03 19:47:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1600 flow [2024-06-03 19:47:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:47:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:47:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 19:47:52,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:47:52,793 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 866 flow. Second operand 10 states and 186 transitions. [2024-06-03 19:47:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1600 flow [2024-06-03 19:47:52,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 170 transitions, 1576 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:52,862 INFO L231 Difference]: Finished difference. Result has 105 places, 132 transitions, 1152 flow [2024-06-03 19:47:52,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1152, PETRI_PLACES=105, PETRI_TRANSITIONS=132} [2024-06-03 19:47:52,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-03 19:47:52,863 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 132 transitions, 1152 flow [2024-06-03 19:47:52,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:52,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:52,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:52,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:47:52,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:52,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1030142181, now seen corresponding path program 2 times [2024-06-03 19:47:52,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:52,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342863665] [2024-06-03 19:47:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:52,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:54,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342863665] [2024-06-03 19:47:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342863665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:54,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:54,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455448166] [2024-06-03 19:47:54,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:54,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:54,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:54,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 132 transitions, 1152 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:54,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:54,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:54,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:54,990 INFO L124 PetriNetUnfolderBase]: 2209/3390 cut-off events. [2024-06-03 19:47:54,991 INFO L125 PetriNetUnfolderBase]: For 53959/53963 co-relation queries the response was YES. [2024-06-03 19:47:55,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18456 conditions, 3390 events. 2209/3390 cut-off events. For 53959/53963 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16484 event pairs, 856 based on Foata normal form. 7/3397 useless extension candidates. Maximal degree in co-relation 18408. Up to 3143 conditions per place. [2024-06-03 19:47:55,016 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 149 selfloop transitions, 48 changer transitions 0/201 dead transitions. [2024-06-03 19:47:55,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 2025 flow [2024-06-03 19:47:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:47:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:47:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:47:55,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:47:55,019 INFO L175 Difference]: Start difference. First operand has 105 places, 132 transitions, 1152 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:47:55,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 2025 flow [2024-06-03 19:47:55,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1898 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:55,060 INFO L231 Difference]: Finished difference. Result has 116 places, 167 transitions, 1595 flow [2024-06-03 19:47:55,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1595, PETRI_PLACES=116, PETRI_TRANSITIONS=167} [2024-06-03 19:47:55,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-03 19:47:55,061 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 167 transitions, 1595 flow [2024-06-03 19:47:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:55,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:55,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:47:55,062 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:55,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash -289321938, now seen corresponding path program 1 times [2024-06-03 19:47:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:55,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217232723] [2024-06-03 19:47:55,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:55,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:55,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217232723] [2024-06-03 19:47:55,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217232723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:55,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:55,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:55,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703755003] [2024-06-03 19:47:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:55,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:55,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:55,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:55,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:55,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 167 transitions, 1595 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:55,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:55,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:55,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:56,741 INFO L124 PetriNetUnfolderBase]: 2353/3586 cut-off events. [2024-06-03 19:47:56,741 INFO L125 PetriNetUnfolderBase]: For 62209/62211 co-relation queries the response was YES. [2024-06-03 19:47:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20252 conditions, 3586 events. 2353/3586 cut-off events. For 62209/62211 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17488 event pairs, 873 based on Foata normal form. 8/3590 useless extension candidates. Maximal degree in co-relation 20198. Up to 3222 conditions per place. [2024-06-03 19:47:56,764 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 184 selfloop transitions, 56 changer transitions 0/244 dead transitions. [2024-06-03 19:47:56,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 244 transitions, 2827 flow [2024-06-03 19:47:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:47:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:47:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:47:56,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:47:56,780 INFO L175 Difference]: Start difference. First operand has 116 places, 167 transitions, 1595 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:47:56,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 244 transitions, 2827 flow [2024-06-03 19:47:56,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 244 transitions, 2710 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-03 19:47:56,830 INFO L231 Difference]: Finished difference. Result has 127 places, 195 transitions, 1912 flow [2024-06-03 19:47:56,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1912, PETRI_PLACES=127, PETRI_TRANSITIONS=195} [2024-06-03 19:47:56,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-03 19:47:56,832 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 195 transitions, 1912 flow [2024-06-03 19:47:56,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:56,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:56,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:56,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:47:56,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:56,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1030051816, now seen corresponding path program 2 times [2024-06-03 19:47:56,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:56,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941002163] [2024-06-03 19:47:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:56,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941002163] [2024-06-03 19:47:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941002163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:57,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360789179] [2024-06-03 19:47:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:57,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:57,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 195 transitions, 1912 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:57,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:57,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:57,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:58,472 INFO L124 PetriNetUnfolderBase]: 2541/3852 cut-off events. [2024-06-03 19:47:58,472 INFO L125 PetriNetUnfolderBase]: For 75789/75791 co-relation queries the response was YES. [2024-06-03 19:47:58,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23514 conditions, 3852 events. 2541/3852 cut-off events. For 75789/75791 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18837 event pairs, 867 based on Foata normal form. 12/3861 useless extension candidates. Maximal degree in co-relation 23456. Up to 3504 conditions per place. [2024-06-03 19:47:58,495 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 191 selfloop transitions, 72 changer transitions 0/267 dead transitions. [2024-06-03 19:47:58,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 267 transitions, 3185 flow [2024-06-03 19:47:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:47:58,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:47:58,497 INFO L175 Difference]: Start difference. First operand has 127 places, 195 transitions, 1912 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:47:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 267 transitions, 3185 flow [2024-06-03 19:47:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 267 transitions, 2912 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:58,565 INFO L231 Difference]: Finished difference. Result has 133 places, 230 transitions, 2334 flow [2024-06-03 19:47:58,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=133, PETRI_TRANSITIONS=230} [2024-06-03 19:47:58,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-03 19:47:58,566 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 230 transitions, 2334 flow [2024-06-03 19:47:58,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:58,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:58,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:47:58,567 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:58,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -139752741, now seen corresponding path program 3 times [2024-06-03 19:47:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:58,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078448796] [2024-06-03 19:47:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:59,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078448796] [2024-06-03 19:47:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078448796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:59,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:59,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:47:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981547955] [2024-06-03 19:47:59,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:59,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:47:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:47:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:47:59,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:47:59,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 230 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:59,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:59,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:47:59,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:00,421 INFO L124 PetriNetUnfolderBase]: 2602/3947 cut-off events. [2024-06-03 19:48:00,422 INFO L125 PetriNetUnfolderBase]: For 83069/83079 co-relation queries the response was YES. [2024-06-03 19:48:00,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24716 conditions, 3947 events. 2602/3947 cut-off events. For 83069/83079 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 19390 event pairs, 877 based on Foata normal form. 12/3956 useless extension candidates. Maximal degree in co-relation 24656. Up to 3634 conditions per place. [2024-06-03 19:48:00,457 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 202 selfloop transitions, 75 changer transitions 0/281 dead transitions. [2024-06-03 19:48:00,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 281 transitions, 3206 flow [2024-06-03 19:48:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:48:00,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:48:00,458 INFO L175 Difference]: Start difference. First operand has 133 places, 230 transitions, 2334 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:48:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 281 transitions, 3206 flow [2024-06-03 19:48:00,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 281 transitions, 3121 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-03 19:48:00,543 INFO L231 Difference]: Finished difference. Result has 142 places, 251 transitions, 2646 flow [2024-06-03 19:48:00,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2646, PETRI_PLACES=142, PETRI_TRANSITIONS=251} [2024-06-03 19:48:00,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-03 19:48:00,544 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 251 transitions, 2646 flow [2024-06-03 19:48:00,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:00,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:00,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:00,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:48:00,545 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:00,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -139752586, now seen corresponding path program 3 times [2024-06-03 19:48:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929686629] [2024-06-03 19:48:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:01,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:01,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929686629] [2024-06-03 19:48:01,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929686629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:01,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:01,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:01,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337804082] [2024-06-03 19:48:01,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:01,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:01,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:01,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:01,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 251 transitions, 2646 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:01,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:01,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:01,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:02,226 INFO L124 PetriNetUnfolderBase]: 2916/4389 cut-off events. [2024-06-03 19:48:02,227 INFO L125 PetriNetUnfolderBase]: For 100503/100509 co-relation queries the response was YES. [2024-06-03 19:48:02,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28348 conditions, 4389 events. 2916/4389 cut-off events. For 100503/100509 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21876 event pairs, 884 based on Foata normal form. 12/4399 useless extension candidates. Maximal degree in co-relation 28284. Up to 3382 conditions per place. [2024-06-03 19:48:02,255 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 226 selfloop transitions, 124 changer transitions 0/354 dead transitions. [2024-06-03 19:48:02,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 354 transitions, 4461 flow [2024-06-03 19:48:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 19:48:02,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:48:02,256 INFO L175 Difference]: Start difference. First operand has 142 places, 251 transitions, 2646 flow. Second operand 9 states and 189 transitions. [2024-06-03 19:48:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 354 transitions, 4461 flow [2024-06-03 19:48:02,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 354 transitions, 4325 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-03 19:48:02,333 INFO L231 Difference]: Finished difference. Result has 152 places, 288 transitions, 3279 flow [2024-06-03 19:48:02,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3279, PETRI_PLACES=152, PETRI_TRANSITIONS=288} [2024-06-03 19:48:02,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-03 19:48:02,334 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 288 transitions, 3279 flow [2024-06-03 19:48:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:02,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:02,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:02,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:48:02,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:02,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash -139747006, now seen corresponding path program 4 times [2024-06-03 19:48:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691197638] [2024-06-03 19:48:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:03,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691197638] [2024-06-03 19:48:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691197638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:03,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:03,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:03,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447735277] [2024-06-03 19:48:03,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:03,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:03,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 288 transitions, 3279 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:03,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:03,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:03,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:04,171 INFO L124 PetriNetUnfolderBase]: 2920/4395 cut-off events. [2024-06-03 19:48:04,171 INFO L125 PetriNetUnfolderBase]: For 113423/113429 co-relation queries the response was YES. [2024-06-03 19:48:04,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30687 conditions, 4395 events. 2920/4395 cut-off events. For 113423/113429 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21904 event pairs, 865 based on Foata normal form. 12/4405 useless extension candidates. Maximal degree in co-relation 30618. Up to 3391 conditions per place. [2024-06-03 19:48:04,207 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 213 selfloop transitions, 139 changer transitions 0/356 dead transitions. [2024-06-03 19:48:04,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 356 transitions, 4772 flow [2024-06-03 19:48:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 19:48:04,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-03 19:48:04,209 INFO L175 Difference]: Start difference. First operand has 152 places, 288 transitions, 3279 flow. Second operand 9 states and 187 transitions. [2024-06-03 19:48:04,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 356 transitions, 4772 flow [2024-06-03 19:48:04,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 356 transitions, 4632 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-03 19:48:04,323 INFO L231 Difference]: Finished difference. Result has 161 places, 294 transitions, 3616 flow [2024-06-03 19:48:04,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3616, PETRI_PLACES=161, PETRI_TRANSITIONS=294} [2024-06-03 19:48:04,323 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-03 19:48:04,323 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 294 transitions, 3616 flow [2024-06-03 19:48:04,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:04,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:04,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:48:04,324 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:04,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2003183379, now seen corresponding path program 4 times [2024-06-03 19:48:04,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241305122] [2024-06-03 19:48:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241305122] [2024-06-03 19:48:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241305122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:05,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927276308] [2024-06-03 19:48:05,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:05,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:05,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:05,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 294 transitions, 3616 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:05,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:05,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:06,285 INFO L124 PetriNetUnfolderBase]: 2912/4388 cut-off events. [2024-06-03 19:48:06,286 INFO L125 PetriNetUnfolderBase]: For 120059/120061 co-relation queries the response was YES. [2024-06-03 19:48:06,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 4388 events. 2912/4388 cut-off events. For 120059/120061 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 21873 event pairs, 970 based on Foata normal form. 5/4390 useless extension candidates. Maximal degree in co-relation 31313. Up to 4056 conditions per place. [2024-06-03 19:48:06,383 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-06-03 19:48:06,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 326 transitions, 4416 flow [2024-06-03 19:48:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:48:06,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:48:06,385 INFO L175 Difference]: Start difference. First operand has 161 places, 294 transitions, 3616 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:48:06,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 326 transitions, 4416 flow [2024-06-03 19:48:06,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 326 transitions, 4136 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:06,488 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3512 flow [2024-06-03 19:48:06,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3512, PETRI_PLACES=165, PETRI_TRANSITIONS=294} [2024-06-03 19:48:06,489 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-03 19:48:06,489 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3512 flow [2024-06-03 19:48:06,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:06,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:06,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:48:06,490 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:06,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2003273744, now seen corresponding path program 5 times [2024-06-03 19:48:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:06,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054573831] [2024-06-03 19:48:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:06,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:07,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:07,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054573831] [2024-06-03 19:48:07,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054573831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:07,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:07,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290539753] [2024-06-03 19:48:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:07,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:07,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 294 transitions, 3512 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:07,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:07,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:07,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:08,326 INFO L124 PetriNetUnfolderBase]: 3111/4678 cut-off events. [2024-06-03 19:48:08,327 INFO L125 PetriNetUnfolderBase]: For 131282/131282 co-relation queries the response was YES. [2024-06-03 19:48:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33508 conditions, 4678 events. 3111/4678 cut-off events. For 131282/131282 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23546 event pairs, 1110 based on Foata normal form. 10/4685 useless extension candidates. Maximal degree in co-relation 33434. Up to 4296 conditions per place. [2024-06-03 19:48:08,364 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 298 selfloop transitions, 80 changer transitions 0/382 dead transitions. [2024-06-03 19:48:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 382 transitions, 5510 flow [2024-06-03 19:48:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:48:08,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:48:08,366 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3512 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:48:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 382 transitions, 5510 flow [2024-06-03 19:48:08,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 382 transitions, 5324 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:08,480 INFO L231 Difference]: Finished difference. Result has 170 places, 348 transitions, 4599 flow [2024-06-03 19:48:08,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4599, PETRI_PLACES=170, PETRI_TRANSITIONS=348} [2024-06-03 19:48:08,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-03 19:48:08,481 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 348 transitions, 4599 flow [2024-06-03 19:48:08,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:08,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:08,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:08,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:48:08,482 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:08,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2006992659, now seen corresponding path program 5 times [2024-06-03 19:48:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:08,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919940530] [2024-06-03 19:48:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:09,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919940530] [2024-06-03 19:48:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919940530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:09,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:09,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412987452] [2024-06-03 19:48:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:09,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:09,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:09,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:09,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 348 transitions, 4599 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:09,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:09,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:09,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:10,256 INFO L124 PetriNetUnfolderBase]: 3122/4691 cut-off events. [2024-06-03 19:48:10,257 INFO L125 PetriNetUnfolderBase]: For 134488/134498 co-relation queries the response was YES. [2024-06-03 19:48:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34789 conditions, 4691 events. 3122/4691 cut-off events. For 134488/134498 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23584 event pairs, 936 based on Foata normal form. 12/4700 useless extension candidates. Maximal degree in co-relation 34711. Up to 4335 conditions per place. [2024-06-03 19:48:10,304 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 85 changer transitions 0/377 dead transitions. [2024-06-03 19:48:10,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 377 transitions, 5579 flow [2024-06-03 19:48:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:48:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:48:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:48:10,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:48:10,305 INFO L175 Difference]: Start difference. First operand has 170 places, 348 transitions, 4599 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:48:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 377 transitions, 5579 flow [2024-06-03 19:48:10,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 377 transitions, 5484 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 19:48:10,469 INFO L231 Difference]: Finished difference. Result has 175 places, 351 transitions, 4771 flow [2024-06-03 19:48:10,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4771, PETRI_PLACES=175, PETRI_TRANSITIONS=351} [2024-06-03 19:48:10,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-03 19:48:10,470 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 351 transitions, 4771 flow [2024-06-03 19:48:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:10,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:10,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:10,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:48:10,470 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:10,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2006992814, now seen corresponding path program 6 times [2024-06-03 19:48:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:10,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341949382] [2024-06-03 19:48:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:10,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341949382] [2024-06-03 19:48:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341949382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:11,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:11,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884513319] [2024-06-03 19:48:11,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:11,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:11,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 351 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:11,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:11,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:11,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:12,341 INFO L124 PetriNetUnfolderBase]: 3456/5167 cut-off events. [2024-06-03 19:48:12,341 INFO L125 PetriNetUnfolderBase]: For 159383/159385 co-relation queries the response was YES. [2024-06-03 19:48:12,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39341 conditions, 5167 events. 3456/5167 cut-off events. For 159383/159385 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26330 event pairs, 1151 based on Foata normal form. 12/5176 useless extension candidates. Maximal degree in co-relation 39261. Up to 4082 conditions per place. [2024-06-03 19:48:12,385 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 294 selfloop transitions, 150 changer transitions 0/448 dead transitions. [2024-06-03 19:48:12,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 448 transitions, 7021 flow [2024-06-03 19:48:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:48:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-03 19:48:12,390 INFO L175 Difference]: Start difference. First operand has 175 places, 351 transitions, 4771 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:48:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 448 transitions, 7021 flow [2024-06-03 19:48:12,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 448 transitions, 6773 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:12,563 INFO L231 Difference]: Finished difference. Result has 180 places, 392 transitions, 5549 flow [2024-06-03 19:48:12,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5549, PETRI_PLACES=180, PETRI_TRANSITIONS=392} [2024-06-03 19:48:12,564 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-03 19:48:12,564 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 392 transitions, 5549 flow [2024-06-03 19:48:12,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:12,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:12,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:12,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:48:12,565 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:12,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:12,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1332441652, now seen corresponding path program 7 times [2024-06-03 19:48:12,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:12,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214463998] [2024-06-03 19:48:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:13,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:13,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214463998] [2024-06-03 19:48:13,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214463998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:13,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:13,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:13,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101364854] [2024-06-03 19:48:13,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:13,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:13,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:13,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:13,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 392 transitions, 5549 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:13,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:13,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:13,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:14,446 INFO L124 PetriNetUnfolderBase]: 3468/5187 cut-off events. [2024-06-03 19:48:14,447 INFO L125 PetriNetUnfolderBase]: For 174695/174697 co-relation queries the response was YES. [2024-06-03 19:48:14,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41404 conditions, 5187 events. 3468/5187 cut-off events. For 174695/174697 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26468 event pairs, 1131 based on Foata normal form. 12/5196 useless extension candidates. Maximal degree in co-relation 41321. Up to 4103 conditions per place. [2024-06-03 19:48:14,501 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 276 selfloop transitions, 173 changer transitions 0/453 dead transitions. [2024-06-03 19:48:14,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 453 transitions, 7262 flow [2024-06-03 19:48:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:48:14,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:48:14,503 INFO L175 Difference]: Start difference. First operand has 180 places, 392 transitions, 5549 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:48:14,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 453 transitions, 7262 flow [2024-06-03 19:48:14,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 453 transitions, 7022 flow, removed 112 selfloop flow, removed 3 redundant places. [2024-06-03 19:48:14,725 INFO L231 Difference]: Finished difference. Result has 188 places, 405 transitions, 6046 flow [2024-06-03 19:48:14,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6046, PETRI_PLACES=188, PETRI_TRANSITIONS=405} [2024-06-03 19:48:14,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-03 19:48:14,725 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 405 transitions, 6046 flow [2024-06-03 19:48:14,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:14,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:14,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:14,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:48:14,726 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:14,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1206409858, now seen corresponding path program 8 times [2024-06-03 19:48:14,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:14,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382838672] [2024-06-03 19:48:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:14,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:15,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382838672] [2024-06-03 19:48:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382838672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536172416] [2024-06-03 19:48:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:15,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:15,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 405 transitions, 6046 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:16,485 INFO L124 PetriNetUnfolderBase]: 3518/5258 cut-off events. [2024-06-03 19:48:16,485 INFO L125 PetriNetUnfolderBase]: For 185845/185845 co-relation queries the response was YES. [2024-06-03 19:48:16,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43058 conditions, 5258 events. 3518/5258 cut-off events. For 185845/185845 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26895 event pairs, 1229 based on Foata normal form. 8/5263 useless extension candidates. Maximal degree in co-relation 42971. Up to 4991 conditions per place. [2024-06-03 19:48:16,538 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 405 selfloop transitions, 33 changer transitions 0/442 dead transitions. [2024-06-03 19:48:16,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 442 transitions, 7322 flow [2024-06-03 19:48:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:48:16,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:48:16,540 INFO L175 Difference]: Start difference. First operand has 188 places, 405 transitions, 6046 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:48:16,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 442 transitions, 7322 flow [2024-06-03 19:48:16,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 442 transitions, 7048 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:16,775 INFO L231 Difference]: Finished difference. Result has 192 places, 413 transitions, 6033 flow [2024-06-03 19:48:16,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6033, PETRI_PLACES=192, PETRI_TRANSITIONS=413} [2024-06-03 19:48:16,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-03 19:48:16,777 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 413 transitions, 6033 flow [2024-06-03 19:48:16,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:16,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:16,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:48:16,777 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:16,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 975446935, now seen corresponding path program 1 times [2024-06-03 19:48:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485356601] [2024-06-03 19:48:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:17,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:17,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485356601] [2024-06-03 19:48:17,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485356601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:17,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:17,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995183957] [2024-06-03 19:48:17,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:17,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:17,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:17,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:17,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 413 transitions, 6033 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:17,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:17,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:18,855 INFO L124 PetriNetUnfolderBase]: 3520/5267 cut-off events. [2024-06-03 19:48:18,856 INFO L125 PetriNetUnfolderBase]: For 190133/190133 co-relation queries the response was YES. [2024-06-03 19:48:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42649 conditions, 5267 events. 3520/5267 cut-off events. For 190133/190133 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26997 event pairs, 1220 based on Foata normal form. 3/5270 useless extension candidates. Maximal degree in co-relation 42561. Up to 5008 conditions per place. [2024-06-03 19:48:18,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 33 changer transitions 0/439 dead transitions. [2024-06-03 19:48:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 439 transitions, 7168 flow [2024-06-03 19:48:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:48:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:48:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:48:18,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:48:18,932 INFO L175 Difference]: Start difference. First operand has 192 places, 413 transitions, 6033 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:48:18,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 439 transitions, 7168 flow [2024-06-03 19:48:19,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 439 transitions, 7003 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:19,145 INFO L231 Difference]: Finished difference. Result has 192 places, 417 transitions, 6040 flow [2024-06-03 19:48:19,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6040, PETRI_PLACES=192, PETRI_TRANSITIONS=417} [2024-06-03 19:48:19,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-03 19:48:19,146 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 417 transitions, 6040 flow [2024-06-03 19:48:19,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:19,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:19,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:19,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:48:19,146 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1091859078, now seen corresponding path program 9 times [2024-06-03 19:48:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:19,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263902940] [2024-06-03 19:48:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:19,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:19,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:19,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263902940] [2024-06-03 19:48:19,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263902940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:19,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:19,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:19,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136192306] [2024-06-03 19:48:19,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:19,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:19,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:20,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:20,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 417 transitions, 6040 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:20,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:20,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:20,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:21,069 INFO L124 PetriNetUnfolderBase]: 3616/5403 cut-off events. [2024-06-03 19:48:21,069 INFO L125 PetriNetUnfolderBase]: For 206586/206586 co-relation queries the response was YES. [2024-06-03 19:48:21,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44410 conditions, 5403 events. 3616/5403 cut-off events. For 206586/206586 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27729 event pairs, 1225 based on Foata normal form. 10/5413 useless extension candidates. Maximal degree in co-relation 44321. Up to 4834 conditions per place. [2024-06-03 19:48:21,130 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 395 selfloop transitions, 73 changer transitions 0/472 dead transitions. [2024-06-03 19:48:21,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 472 transitions, 7842 flow [2024-06-03 19:48:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:48:21,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:48:21,132 INFO L175 Difference]: Start difference. First operand has 192 places, 417 transitions, 6040 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:48:21,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 472 transitions, 7842 flow [2024-06-03 19:48:21,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 472 transitions, 7730 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:48:21,431 INFO L231 Difference]: Finished difference. Result has 197 places, 436 transitions, 6532 flow [2024-06-03 19:48:21,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6532, PETRI_PLACES=197, PETRI_TRANSITIONS=436} [2024-06-03 19:48:21,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-03 19:48:21,431 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 436 transitions, 6532 flow [2024-06-03 19:48:21,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:21,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:21,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:48:21,432 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:21,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1091864813, now seen corresponding path program 6 times [2024-06-03 19:48:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:21,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450729598] [2024-06-03 19:48:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:22,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:22,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450729598] [2024-06-03 19:48:22,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450729598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:22,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:22,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:22,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099471460] [2024-06-03 19:48:22,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:22,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:22,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:22,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:22,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:22,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 436 transitions, 6532 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:22,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:22,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:23,569 INFO L124 PetriNetUnfolderBase]: 3611/5397 cut-off events. [2024-06-03 19:48:23,569 INFO L125 PetriNetUnfolderBase]: For 216608/216608 co-relation queries the response was YES. [2024-06-03 19:48:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45200 conditions, 5397 events. 3611/5397 cut-off events. For 216608/216608 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27696 event pairs, 1252 based on Foata normal form. 2/5399 useless extension candidates. Maximal degree in co-relation 45109. Up to 5192 conditions per place. [2024-06-03 19:48:23,624 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 23 changer transitions 0/461 dead transitions. [2024-06-03 19:48:23,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 461 transitions, 7666 flow [2024-06-03 19:48:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:48:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:48:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:48:23,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:48:23,626 INFO L175 Difference]: Start difference. First operand has 197 places, 436 transitions, 6532 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:48:23,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 461 transitions, 7666 flow [2024-06-03 19:48:23,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 461 transitions, 7291 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:23,869 INFO L231 Difference]: Finished difference. Result has 199 places, 439 transitions, 6316 flow [2024-06-03 19:48:23,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6316, PETRI_PLACES=199, PETRI_TRANSITIONS=439} [2024-06-03 19:48:23,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-03 19:48:23,870 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 439 transitions, 6316 flow [2024-06-03 19:48:23,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:23,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:23,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:23,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:48:23,871 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:23,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash 508144494, now seen corresponding path program 10 times [2024-06-03 19:48:23,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:23,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606713633] [2024-06-03 19:48:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:23,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:24,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606713633] [2024-06-03 19:48:24,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606713633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:24,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:24,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:24,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019527492] [2024-06-03 19:48:24,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:24,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:24,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 439 transitions, 6316 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:24,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:24,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:24,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:25,748 INFO L124 PetriNetUnfolderBase]: 3591/5368 cut-off events. [2024-06-03 19:48:25,748 INFO L125 PetriNetUnfolderBase]: For 218089/218089 co-relation queries the response was YES. [2024-06-03 19:48:25,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44184 conditions, 5368 events. 3591/5368 cut-off events. For 218089/218089 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27490 event pairs, 1196 based on Foata normal form. 10/5378 useless extension candidates. Maximal degree in co-relation 44092. Up to 4818 conditions per place. [2024-06-03 19:48:25,807 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 400 selfloop transitions, 71 changer transitions 0/475 dead transitions. [2024-06-03 19:48:25,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 475 transitions, 7693 flow [2024-06-03 19:48:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:48:25,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:48:25,809 INFO L175 Difference]: Start difference. First operand has 199 places, 439 transitions, 6316 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:48:25,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 475 transitions, 7693 flow [2024-06-03 19:48:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 475 transitions, 7488 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:26,072 INFO L231 Difference]: Finished difference. Result has 202 places, 439 transitions, 6269 flow [2024-06-03 19:48:26,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6269, PETRI_PLACES=202, PETRI_TRANSITIONS=439} [2024-06-03 19:48:26,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:48:26,073 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 439 transitions, 6269 flow [2024-06-03 19:48:26,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:26,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:26,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:26,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:48:26,074 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:26,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1477671676, now seen corresponding path program 1 times [2024-06-03 19:48:26,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:26,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668165711] [2024-06-03 19:48:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:26,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:26,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:26,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668165711] [2024-06-03 19:48:26,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668165711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:26,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:26,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:48:26,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216304389] [2024-06-03 19:48:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:48:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:48:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:48:26,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:26,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 439 transitions, 6269 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:26,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:26,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:26,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:27,704 INFO L124 PetriNetUnfolderBase]: 3571/5268 cut-off events. [2024-06-03 19:48:27,704 INFO L125 PetriNetUnfolderBase]: For 247108/247247 co-relation queries the response was YES. [2024-06-03 19:48:27,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44894 conditions, 5268 events. 3571/5268 cut-off events. For 247108/247247 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26591 event pairs, 1277 based on Foata normal form. 53/5285 useless extension candidates. Maximal degree in co-relation 44801. Up to 5065 conditions per place. [2024-06-03 19:48:27,765 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 413 selfloop transitions, 12 changer transitions 0/450 dead transitions. [2024-06-03 19:48:27,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 450 transitions, 7177 flow [2024-06-03 19:48:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:48:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:48:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 19:48:27,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:48:27,766 INFO L175 Difference]: Start difference. First operand has 202 places, 439 transitions, 6269 flow. Second operand 6 states and 102 transitions. [2024-06-03 19:48:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 450 transitions, 7177 flow [2024-06-03 19:48:28,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 450 transitions, 7013 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:28,022 INFO L231 Difference]: Finished difference. Result has 200 places, 442 transitions, 6167 flow [2024-06-03 19:48:28,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6167, PETRI_PLACES=200, PETRI_TRANSITIONS=442} [2024-06-03 19:48:28,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-03 19:48:28,022 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 442 transitions, 6167 flow [2024-06-03 19:48:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:28,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:28,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:48:28,023 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:28,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash 629099501, now seen corresponding path program 1 times [2024-06-03 19:48:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:28,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250672543] [2024-06-03 19:48:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250672543] [2024-06-03 19:48:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250672543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:28,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:28,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046768876] [2024-06-03 19:48:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:28,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:28,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 442 transitions, 6167 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:28,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:28,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:28,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:29,771 INFO L124 PetriNetUnfolderBase]: 3736/5559 cut-off events. [2024-06-03 19:48:29,771 INFO L125 PetriNetUnfolderBase]: For 266339/266346 co-relation queries the response was YES. [2024-06-03 19:48:29,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47531 conditions, 5559 events. 3736/5559 cut-off events. For 266339/266346 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 28503 event pairs, 890 based on Foata normal form. 10/5569 useless extension candidates. Maximal degree in co-relation 47438. Up to 5032 conditions per place. [2024-06-03 19:48:29,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 406 selfloop transitions, 80 changer transitions 0/491 dead transitions. [2024-06-03 19:48:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 491 transitions, 7799 flow [2024-06-03 19:48:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:48:29,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-03 19:48:29,832 INFO L175 Difference]: Start difference. First operand has 200 places, 442 transitions, 6167 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:48:29,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 491 transitions, 7799 flow [2024-06-03 19:48:30,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 491 transitions, 7759 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:30,123 INFO L231 Difference]: Finished difference. Result has 208 places, 451 transitions, 6615 flow [2024-06-03 19:48:30,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6615, PETRI_PLACES=208, PETRI_TRANSITIONS=451} [2024-06-03 19:48:30,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-03 19:48:30,124 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 451 transitions, 6615 flow [2024-06-03 19:48:30,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:30,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:30,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:30,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:48:30,125 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:30,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:30,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1215174109, now seen corresponding path program 1 times [2024-06-03 19:48:30,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:30,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541012521] [2024-06-03 19:48:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:30,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541012521] [2024-06-03 19:48:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541012521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:30,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:30,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:30,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563071489] [2024-06-03 19:48:30,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:30,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:30,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:30,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:30,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 451 transitions, 6615 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:30,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:30,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:30,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:32,194 INFO L124 PetriNetUnfolderBase]: 3954/5857 cut-off events. [2024-06-03 19:48:32,194 INFO L125 PetriNetUnfolderBase]: For 296782/296792 co-relation queries the response was YES. [2024-06-03 19:48:32,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51732 conditions, 5857 events. 3954/5857 cut-off events. For 296782/296792 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30209 event pairs, 1011 based on Foata normal form. 8/5853 useless extension candidates. Maximal degree in co-relation 51636. Up to 4752 conditions per place. [2024-06-03 19:48:32,262 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 389 selfloop transitions, 142 changer transitions 0/536 dead transitions. [2024-06-03 19:48:32,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 536 transitions, 9138 flow [2024-06-03 19:48:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 19:48:32,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-03 19:48:32,264 INFO L175 Difference]: Start difference. First operand has 208 places, 451 transitions, 6615 flow. Second operand 11 states and 222 transitions. [2024-06-03 19:48:32,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 536 transitions, 9138 flow [2024-06-03 19:48:32,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 536 transitions, 8885 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:32,615 INFO L231 Difference]: Finished difference. Result has 215 places, 478 transitions, 7208 flow [2024-06-03 19:48:32,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6362, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7208, PETRI_PLACES=215, PETRI_TRANSITIONS=478} [2024-06-03 19:48:32,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-03 19:48:32,616 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 478 transitions, 7208 flow [2024-06-03 19:48:32,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:32,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:32,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:48:32,617 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:32,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:32,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1212343065, now seen corresponding path program 2 times [2024-06-03 19:48:32,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940176044] [2024-06-03 19:48:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940176044] [2024-06-03 19:48:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940176044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629239591] [2024-06-03 19:48:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:33,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 478 transitions, 7208 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:33,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:33,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:34,771 INFO L124 PetriNetUnfolderBase]: 4046/6017 cut-off events. [2024-06-03 19:48:34,772 INFO L125 PetriNetUnfolderBase]: For 319269/319278 co-relation queries the response was YES. [2024-06-03 19:48:34,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 6017 events. 4046/6017 cut-off events. For 319269/319278 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 31410 event pairs, 1090 based on Foata normal form. 12/6024 useless extension candidates. Maximal degree in co-relation 54108. Up to 5515 conditions per place. [2024-06-03 19:48:34,835 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 438 selfloop transitions, 91 changer transitions 0/534 dead transitions. [2024-06-03 19:48:34,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 534 transitions, 8886 flow [2024-06-03 19:48:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-03 19:48:34,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-03 19:48:34,837 INFO L175 Difference]: Start difference. First operand has 215 places, 478 transitions, 7208 flow. Second operand 11 states and 204 transitions. [2024-06-03 19:48:34,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 534 transitions, 8886 flow [2024-06-03 19:48:35,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 534 transitions, 8730 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-03 19:48:35,223 INFO L231 Difference]: Finished difference. Result has 224 places, 492 transitions, 7582 flow [2024-06-03 19:48:35,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7582, PETRI_PLACES=224, PETRI_TRANSITIONS=492} [2024-06-03 19:48:35,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-03 19:48:35,224 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 492 transitions, 7582 flow [2024-06-03 19:48:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:35,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:35,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:48:35,224 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1185591615, now seen corresponding path program 3 times [2024-06-03 19:48:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713138521] [2024-06-03 19:48:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:35,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713138521] [2024-06-03 19:48:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713138521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:35,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:35,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:48:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416053924] [2024-06-03 19:48:35,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:35,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:48:35,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:35,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:48:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:48:36,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:36,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 492 transitions, 7582 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:36,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:36,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:36,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:37,697 INFO L124 PetriNetUnfolderBase]: 4049/6026 cut-off events. [2024-06-03 19:48:37,698 INFO L125 PetriNetUnfolderBase]: For 329629/329633 co-relation queries the response was YES. [2024-06-03 19:48:37,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54673 conditions, 6026 events. 4049/6026 cut-off events. For 329629/329633 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31479 event pairs, 1114 based on Foata normal form. 8/6029 useless extension candidates. Maximal degree in co-relation 54571. Up to 5610 conditions per place. [2024-06-03 19:48:37,766 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 81 changer transitions 0/530 dead transitions. [2024-06-03 19:48:37,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 530 transitions, 8868 flow [2024-06-03 19:48:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-03 19:48:37,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42071881606765327 [2024-06-03 19:48:37,767 INFO L175 Difference]: Start difference. First operand has 224 places, 492 transitions, 7582 flow. Second operand 11 states and 199 transitions. [2024-06-03 19:48:37,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 530 transitions, 8868 flow [2024-06-03 19:48:38,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 530 transitions, 8674 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:38,212 INFO L231 Difference]: Finished difference. Result has 229 places, 494 transitions, 7636 flow [2024-06-03 19:48:38,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7388, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7636, PETRI_PLACES=229, PETRI_TRANSITIONS=494} [2024-06-03 19:48:38,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-03 19:48:38,213 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 494 transitions, 7636 flow [2024-06-03 19:48:38,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:38,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:38,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:38,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:48:38,213 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:38,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1869695745, now seen corresponding path program 4 times [2024-06-03 19:48:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:38,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411874526] [2024-06-03 19:48:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:39,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411874526] [2024-06-03 19:48:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411874526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:39,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:39,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008767112] [2024-06-03 19:48:39,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:39,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:39,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 494 transitions, 7636 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:39,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:39,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:40,767 INFO L124 PetriNetUnfolderBase]: 4207/6274 cut-off events. [2024-06-03 19:48:40,768 INFO L125 PetriNetUnfolderBase]: For 353497/353501 co-relation queries the response was YES. [2024-06-03 19:48:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57342 conditions, 6274 events. 4207/6274 cut-off events. For 353497/353501 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33235 event pairs, 1096 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 57238. Up to 5822 conditions per place. [2024-06-03 19:48:40,839 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 473 selfloop transitions, 80 changer transitions 0/558 dead transitions. [2024-06-03 19:48:40,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 558 transitions, 9580 flow [2024-06-03 19:48:40,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 19:48:40,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-03 19:48:40,840 INFO L175 Difference]: Start difference. First operand has 229 places, 494 transitions, 7636 flow. Second operand 11 states and 202 transitions. [2024-06-03 19:48:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 558 transitions, 9580 flow [2024-06-03 19:48:41,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 9245 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-03 19:48:41,424 INFO L231 Difference]: Finished difference. Result has 232 places, 516 transitions, 8056 flow [2024-06-03 19:48:41,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8056, PETRI_PLACES=232, PETRI_TRANSITIONS=516} [2024-06-03 19:48:41,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-03 19:48:41,426 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 516 transitions, 8056 flow [2024-06-03 19:48:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:41,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:41,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:41,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:48:41,427 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:41,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1869635295, now seen corresponding path program 5 times [2024-06-03 19:48:41,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:41,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627464438] [2024-06-03 19:48:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:41,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627464438] [2024-06-03 19:48:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627464438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:42,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276138230] [2024-06-03 19:48:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:42,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:42,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:42,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 516 transitions, 8056 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:42,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:42,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:42,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:44,062 INFO L124 PetriNetUnfolderBase]: 4189/6250 cut-off events. [2024-06-03 19:48:44,063 INFO L125 PetriNetUnfolderBase]: For 360263/360267 co-relation queries the response was YES. [2024-06-03 19:48:44,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57054 conditions, 6250 events. 4189/6250 cut-off events. For 360263/360267 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33175 event pairs, 1114 based on Foata normal form. 10/6255 useless extension candidates. Maximal degree in co-relation 56948. Up to 5903 conditions per place. [2024-06-03 19:48:44,141 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 480 selfloop transitions, 68 changer transitions 0/553 dead transitions. [2024-06-03 19:48:44,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 553 transitions, 9305 flow [2024-06-03 19:48:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-03 19:48:44,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-03 19:48:44,142 INFO L175 Difference]: Start difference. First operand has 232 places, 516 transitions, 8056 flow. Second operand 11 states and 197 transitions. [2024-06-03 19:48:44,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 553 transitions, 9305 flow [2024-06-03 19:48:44,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 553 transitions, 8968 flow, removed 137 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:44,832 INFO L231 Difference]: Finished difference. Result has 237 places, 516 transitions, 7870 flow [2024-06-03 19:48:44,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7870, PETRI_PLACES=237, PETRI_TRANSITIONS=516} [2024-06-03 19:48:44,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-03 19:48:44,834 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 516 transitions, 7870 flow [2024-06-03 19:48:44,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:44,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:44,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:48:44,835 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:44,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1869635171, now seen corresponding path program 2 times [2024-06-03 19:48:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144295817] [2024-06-03 19:48:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144295817] [2024-06-03 19:48:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144295817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:45,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:45,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:45,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825827535] [2024-06-03 19:48:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:46,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:46,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 516 transitions, 7870 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:46,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:46,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:46,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:47,536 INFO L124 PetriNetUnfolderBase]: 4371/6510 cut-off events. [2024-06-03 19:48:47,536 INFO L125 PetriNetUnfolderBase]: For 381254/381258 co-relation queries the response was YES. [2024-06-03 19:48:47,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59457 conditions, 6510 events. 4371/6510 cut-off events. For 381254/381258 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34760 event pairs, 1096 based on Foata normal form. 12/6517 useless extension candidates. Maximal degree in co-relation 59349. Up to 5774 conditions per place. [2024-06-03 19:48:47,612 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 447 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-03 19:48:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 595 transitions, 10212 flow [2024-06-03 19:48:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:48:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:48:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-03 19:48:47,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:48:47,614 INFO L175 Difference]: Start difference. First operand has 237 places, 516 transitions, 7870 flow. Second operand 12 states and 234 transitions. [2024-06-03 19:48:47,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 595 transitions, 10212 flow [2024-06-03 19:48:48,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 595 transitions, 10091 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:48,187 INFO L231 Difference]: Finished difference. Result has 243 places, 544 transitions, 8618 flow [2024-06-03 19:48:48,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8618, PETRI_PLACES=243, PETRI_TRANSITIONS=544} [2024-06-03 19:48:48,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-03 19:48:48,188 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 544 transitions, 8618 flow [2024-06-03 19:48:48,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:48,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:48,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:48,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:48:48,189 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:48,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1751542841, now seen corresponding path program 3 times [2024-06-03 19:48:48,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:48,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799709819] [2024-06-03 19:48:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:49,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:49,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:49,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799709819] [2024-06-03 19:48:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799709819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:49,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:49,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:49,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385153164] [2024-06-03 19:48:49,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:49,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:49,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:49,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:49,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:49,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 544 transitions, 8618 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:49,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:49,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:49,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:51,018 INFO L124 PetriNetUnfolderBase]: 4417/6575 cut-off events. [2024-06-03 19:48:51,019 INFO L125 PetriNetUnfolderBase]: For 405271/405279 co-relation queries the response was YES. [2024-06-03 19:48:51,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61382 conditions, 6575 events. 4417/6575 cut-off events. For 405271/405279 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35227 event pairs, 1021 based on Foata normal form. 12/6582 useless extension candidates. Maximal degree in co-relation 61271. Up to 5154 conditions per place. [2024-06-03 19:48:51,093 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 401 selfloop transitions, 220 changer transitions 0/626 dead transitions. [2024-06-03 19:48:51,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 626 transitions, 11006 flow [2024-06-03 19:48:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 19:48:51,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:48:51,095 INFO L175 Difference]: Start difference. First operand has 243 places, 544 transitions, 8618 flow. Second operand 10 states and 205 transitions. [2024-06-03 19:48:51,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 626 transitions, 11006 flow [2024-06-03 19:48:51,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 626 transitions, 10682 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-06-03 19:48:51,690 INFO L231 Difference]: Finished difference. Result has 247 places, 548 transitions, 8862 flow [2024-06-03 19:48:51,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8862, PETRI_PLACES=247, PETRI_TRANSITIONS=548} [2024-06-03 19:48:51,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-03 19:48:51,692 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 548 transitions, 8862 flow [2024-06-03 19:48:51,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:51,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:51,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:48:51,693 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:51,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1520501369, now seen corresponding path program 6 times [2024-06-03 19:48:51,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:51,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204375265] [2024-06-03 19:48:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:52,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:52,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204375265] [2024-06-03 19:48:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204375265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:52,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:52,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435485088] [2024-06-03 19:48:52,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:52,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:52,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:52,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:52,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:52,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 548 transitions, 8862 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:52,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:52,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:52,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:54,323 INFO L124 PetriNetUnfolderBase]: 4422/6583 cut-off events. [2024-06-03 19:48:54,324 INFO L125 PetriNetUnfolderBase]: For 421315/421327 co-relation queries the response was YES. [2024-06-03 19:48:54,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62985 conditions, 6583 events. 4422/6583 cut-off events. For 421315/421327 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35099 event pairs, 1102 based on Foata normal form. 12/6590 useless extension candidates. Maximal degree in co-relation 62872. Up to 6187 conditions per place. [2024-06-03 19:48:54,404 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 489 selfloop transitions, 91 changer transitions 0/585 dead transitions. [2024-06-03 19:48:54,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 585 transitions, 10335 flow [2024-06-03 19:48:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:48:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:48:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-03 19:48:54,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-03 19:48:54,406 INFO L175 Difference]: Start difference. First operand has 247 places, 548 transitions, 8862 flow. Second operand 10 states and 183 transitions. [2024-06-03 19:48:54,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 585 transitions, 10335 flow [2024-06-03 19:48:54,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 585 transitions, 9825 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:54,974 INFO L231 Difference]: Finished difference. Result has 250 places, 550 transitions, 8649 flow [2024-06-03 19:48:54,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8649, PETRI_PLACES=250, PETRI_TRANSITIONS=550} [2024-06-03 19:48:54,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-03 19:48:54,975 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 550 transitions, 8649 flow [2024-06-03 19:48:54,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:54,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:54,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:54,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:48:54,976 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:54,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1520501245, now seen corresponding path program 4 times [2024-06-03 19:48:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:54,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668932863] [2024-06-03 19:48:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668932863] [2024-06-03 19:48:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668932863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:55,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643776129] [2024-06-03 19:48:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:55,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:55,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:55,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:55,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 550 transitions, 8649 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:55,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:55,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:55,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:57,735 INFO L124 PetriNetUnfolderBase]: 4526/6733 cut-off events. [2024-06-03 19:48:57,736 INFO L125 PetriNetUnfolderBase]: For 448165/448175 co-relation queries the response was YES. [2024-06-03 19:48:57,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64050 conditions, 6733 events. 4526/6733 cut-off events. For 448165/448175 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36154 event pairs, 1021 based on Foata normal form. 12/6740 useless extension candidates. Maximal degree in co-relation 63936. Up to 5184 conditions per place. [2024-06-03 19:48:57,822 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 409 selfloop transitions, 230 changer transitions 0/644 dead transitions. [2024-06-03 19:48:57,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 644 transitions, 11467 flow [2024-06-03 19:48:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:48:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:48:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-03 19:48:57,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780126849894294 [2024-06-03 19:48:57,823 INFO L175 Difference]: Start difference. First operand has 250 places, 550 transitions, 8649 flow. Second operand 11 states and 226 transitions. [2024-06-03 19:48:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 644 transitions, 11467 flow [2024-06-03 19:48:58,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 644 transitions, 11188 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:58,440 INFO L231 Difference]: Finished difference. Result has 254 places, 558 transitions, 9086 flow [2024-06-03 19:48:58,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9086, PETRI_PLACES=254, PETRI_TRANSITIONS=558} [2024-06-03 19:48:58,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-03 19:48:58,441 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 558 transitions, 9086 flow [2024-06-03 19:48:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:58,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:58,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:48:58,442 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:58,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash -37188677, now seen corresponding path program 5 times [2024-06-03 19:48:58,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666818888] [2024-06-03 19:48:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666818888] [2024-06-03 19:48:59,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666818888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:59,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:59,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793879012] [2024-06-03 19:48:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:59,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:59,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:59,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:59,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:48:59,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 558 transitions, 9086 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:59,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:59,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:48:59,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:01,437 INFO L124 PetriNetUnfolderBase]: 4530/6739 cut-off events. [2024-06-03 19:49:01,438 INFO L125 PetriNetUnfolderBase]: For 469523/469533 co-relation queries the response was YES. [2024-06-03 19:49:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65760 conditions, 6739 events. 4530/6739 cut-off events. For 469523/469533 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36200 event pairs, 995 based on Foata normal form. 12/6746 useless extension candidates. Maximal degree in co-relation 65644. Up to 5318 conditions per place. [2024-06-03 19:49:01,510 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 395 selfloop transitions, 240 changer transitions 0/640 dead transitions. [2024-06-03 19:49:01,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 640 transitions, 11472 flow [2024-06-03 19:49:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 19:49:01,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-03 19:49:01,512 INFO L175 Difference]: Start difference. First operand has 254 places, 558 transitions, 9086 flow. Second operand 10 states and 204 transitions. [2024-06-03 19:49:01,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 640 transitions, 11472 flow [2024-06-03 19:49:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 640 transitions, 11039 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:02,114 INFO L231 Difference]: Finished difference. Result has 257 places, 562 transitions, 9282 flow [2024-06-03 19:49:02,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8679, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9282, PETRI_PLACES=257, PETRI_TRANSITIONS=562} [2024-06-03 19:49:02,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-03 19:49:02,114 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 562 transitions, 9282 flow [2024-06-03 19:49:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:02,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:02,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:49:02,115 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:02,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash -37181733, now seen corresponding path program 1 times [2024-06-03 19:49:02,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:02,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408018781] [2024-06-03 19:49:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:02,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:02,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408018781] [2024-06-03 19:49:02,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408018781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:02,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:02,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:49:02,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726969556] [2024-06-03 19:49:02,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:02,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:49:02,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:49:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:49:03,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:03,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 562 transitions, 9282 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:03,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:03,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:03,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:04,807 INFO L124 PetriNetUnfolderBase]: 4590/6825 cut-off events. [2024-06-03 19:49:04,807 INFO L125 PetriNetUnfolderBase]: For 489477/489485 co-relation queries the response was YES. [2024-06-03 19:49:04,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67681 conditions, 6825 events. 4590/6825 cut-off events. For 489477/489485 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36746 event pairs, 1097 based on Foata normal form. 10/6830 useless extension candidates. Maximal degree in co-relation 67563. Up to 6219 conditions per place. [2024-06-03 19:49:04,894 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 519 selfloop transitions, 100 changer transitions 0/624 dead transitions. [2024-06-03 19:49:04,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 624 transitions, 11456 flow [2024-06-03 19:49:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:49:04,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-03 19:49:04,896 INFO L175 Difference]: Start difference. First operand has 257 places, 562 transitions, 9282 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:49:04,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 624 transitions, 11456 flow [2024-06-03 19:49:05,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 624 transitions, 10974 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:05,626 INFO L231 Difference]: Finished difference. Result has 260 places, 582 transitions, 9388 flow [2024-06-03 19:49:05,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8806, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9388, PETRI_PLACES=260, PETRI_TRANSITIONS=582} [2024-06-03 19:49:05,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-03 19:49:05,627 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 582 transitions, 9388 flow [2024-06-03 19:49:05,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:05,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:05,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:49:05,628 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:05,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1699628745, now seen corresponding path program 1 times [2024-06-03 19:49:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734479550] [2024-06-03 19:49:05,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:06,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734479550] [2024-06-03 19:49:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734479550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:06,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:06,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:49:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350907908] [2024-06-03 19:49:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:06,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:49:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:49:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:49:06,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:06,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 582 transitions, 9388 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:06,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:06,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:06,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:07,998 INFO L124 PetriNetUnfolderBase]: 4340/6531 cut-off events. [2024-06-03 19:49:07,999 INFO L125 PetriNetUnfolderBase]: For 496924/497039 co-relation queries the response was YES. [2024-06-03 19:49:08,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64972 conditions, 6531 events. 4340/6531 cut-off events. For 496924/497039 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35800 event pairs, 1086 based on Foata normal form. 21/6517 useless extension candidates. Maximal degree in co-relation 64852. Up to 6107 conditions per place. [2024-06-03 19:49:08,098 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 509 selfloop transitions, 56 changer transitions 0/600 dead transitions. [2024-06-03 19:49:08,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 600 transitions, 10692 flow [2024-06-03 19:49:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:49:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:49:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:49:08,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:49:08,099 INFO L175 Difference]: Start difference. First operand has 260 places, 582 transitions, 9388 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:49:08,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 600 transitions, 10692 flow [2024-06-03 19:49:08,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 600 transitions, 10093 flow, removed 109 selfloop flow, removed 9 redundant places. [2024-06-03 19:49:08,783 INFO L231 Difference]: Finished difference. Result has 258 places, 582 transitions, 8926 flow [2024-06-03 19:49:08,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8926, PETRI_PLACES=258, PETRI_TRANSITIONS=582} [2024-06-03 19:49:08,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-03 19:49:08,784 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 582 transitions, 8926 flow [2024-06-03 19:49:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:08,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:08,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:08,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:49:08,785 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:08,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:08,785 INFO L85 PathProgramCache]: Analyzing trace with hash 979598911, now seen corresponding path program 7 times [2024-06-03 19:49:08,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:08,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633607015] [2024-06-03 19:49:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:08,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:09,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:09,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633607015] [2024-06-03 19:49:09,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633607015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:09,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:09,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414237538] [2024-06-03 19:49:09,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:10,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:10,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 582 transitions, 8926 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:10,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:10,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:10,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:11,685 INFO L124 PetriNetUnfolderBase]: 4594/6844 cut-off events. [2024-06-03 19:49:11,685 INFO L125 PetriNetUnfolderBase]: For 518622/518635 co-relation queries the response was YES. [2024-06-03 19:49:11,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66389 conditions, 6844 events. 4594/6844 cut-off events. For 518622/518635 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 36968 event pairs, 940 based on Foata normal form. 14/6853 useless extension candidates. Maximal degree in co-relation 66272. Up to 6060 conditions per place. [2024-06-03 19:49:11,779 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 132 changer transitions 0/627 dead transitions. [2024-06-03 19:49:11,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 627 transitions, 10730 flow [2024-06-03 19:49:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 19:49:11,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:49:11,780 INFO L175 Difference]: Start difference. First operand has 258 places, 582 transitions, 8926 flow. Second operand 10 states and 186 transitions. [2024-06-03 19:49:11,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 627 transitions, 10730 flow [2024-06-03 19:49:12,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 627 transitions, 10607 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:49:12,615 INFO L231 Difference]: Finished difference. Result has 263 places, 586 transitions, 9246 flow [2024-06-03 19:49:12,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9246, PETRI_PLACES=263, PETRI_TRANSITIONS=586} [2024-06-03 19:49:12,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-03 19:49:12,616 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 586 transitions, 9246 flow [2024-06-03 19:49:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:12,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:12,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:12,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:49:12,617 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:12,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1969143849, now seen corresponding path program 8 times [2024-06-03 19:49:12,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:12,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128459229] [2024-06-03 19:49:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:12,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:13,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128459229] [2024-06-03 19:49:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128459229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:13,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804141702] [2024-06-03 19:49:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:13,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:13,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:13,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:13,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:13,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:13,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 586 transitions, 9246 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:13,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:13,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:13,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:15,483 INFO L124 PetriNetUnfolderBase]: 4576/6821 cut-off events. [2024-06-03 19:49:15,484 INFO L125 PetriNetUnfolderBase]: For 522889/522895 co-relation queries the response was YES. [2024-06-03 19:49:15,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66642 conditions, 6821 events. 4576/6821 cut-off events. For 522889/522895 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36790 event pairs, 1147 based on Foata normal form. 10/6826 useless extension candidates. Maximal degree in co-relation 66524. Up to 6312 conditions per place. [2024-06-03 19:49:15,573 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 516 selfloop transitions, 102 changer transitions 0/623 dead transitions. [2024-06-03 19:49:15,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 623 transitions, 10690 flow [2024-06-03 19:49:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:49:15,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-03 19:49:15,574 INFO L175 Difference]: Start difference. First operand has 263 places, 586 transitions, 9246 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:49:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 623 transitions, 10690 flow [2024-06-03 19:49:16,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 623 transitions, 10200 flow, removed 143 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:16,398 INFO L231 Difference]: Finished difference. Result has 265 places, 586 transitions, 8988 flow [2024-06-03 19:49:16,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8756, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8988, PETRI_PLACES=265, PETRI_TRANSITIONS=586} [2024-06-03 19:49:16,398 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-03 19:49:16,399 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 586 transitions, 8988 flow [2024-06-03 19:49:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:16,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:16,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:16,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:49:16,399 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:16,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash -116312795, now seen corresponding path program 6 times [2024-06-03 19:49:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:16,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685201715] [2024-06-03 19:49:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:17,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685201715] [2024-06-03 19:49:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685201715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:17,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632794881] [2024-06-03 19:49:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:17,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:17,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:17,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:17,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 586 transitions, 8988 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:17,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:17,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:17,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:19,130 INFO L124 PetriNetUnfolderBase]: 4980/7400 cut-off events. [2024-06-03 19:49:19,131 INFO L125 PetriNetUnfolderBase]: For 517802/517812 co-relation queries the response was YES. [2024-06-03 19:49:19,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70724 conditions, 7400 events. 4980/7400 cut-off events. For 517802/517812 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40411 event pairs, 1089 based on Foata normal form. 12/7400 useless extension candidates. Maximal degree in co-relation 70606. Up to 5935 conditions per place. [2024-06-03 19:49:19,232 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 453 selfloop transitions, 241 changer transitions 0/699 dead transitions. [2024-06-03 19:49:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 699 transitions, 12331 flow [2024-06-03 19:49:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:49:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:49:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-03 19:49:19,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-03 19:49:19,234 INFO L175 Difference]: Start difference. First operand has 265 places, 586 transitions, 8988 flow. Second operand 10 states and 203 transitions. [2024-06-03 19:49:19,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 699 transitions, 12331 flow [2024-06-03 19:49:19,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 699 transitions, 12049 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 19:49:19,921 INFO L231 Difference]: Finished difference. Result has 267 places, 642 transitions, 10258 flow [2024-06-03 19:49:19,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10258, PETRI_PLACES=267, PETRI_TRANSITIONS=642} [2024-06-03 19:49:19,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-03 19:49:19,922 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 642 transitions, 10258 flow [2024-06-03 19:49:19,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:19,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:19,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:19,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:49:19,923 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:19,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1971945133, now seen corresponding path program 7 times [2024-06-03 19:49:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943998667] [2024-06-03 19:49:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:20,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:20,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943998667] [2024-06-03 19:49:20,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943998667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:20,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:20,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189902732] [2024-06-03 19:49:20,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:20,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:20,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:20,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:20,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:20,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 642 transitions, 10258 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:20,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:22,797 INFO L124 PetriNetUnfolderBase]: 5166/7662 cut-off events. [2024-06-03 19:49:22,797 INFO L125 PetriNetUnfolderBase]: For 512080/512090 co-relation queries the response was YES. [2024-06-03 19:49:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73664 conditions, 7662 events. 5166/7662 cut-off events. For 512080/512090 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42054 event pairs, 1184 based on Foata normal form. 12/7663 useless extension candidates. Maximal degree in co-relation 73545. Up to 6812 conditions per place. [2024-06-03 19:49:22,911 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 528 selfloop transitions, 171 changer transitions 0/704 dead transitions. [2024-06-03 19:49:22,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 704 transitions, 12523 flow [2024-06-03 19:49:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 19:49:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-03 19:49:22,918 INFO L175 Difference]: Start difference. First operand has 267 places, 642 transitions, 10258 flow. Second operand 9 states and 176 transitions. [2024-06-03 19:49:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 704 transitions, 12523 flow [2024-06-03 19:49:23,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 704 transitions, 11894 flow, removed 153 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:23,681 INFO L231 Difference]: Finished difference. Result has 270 places, 664 transitions, 10397 flow [2024-06-03 19:49:23,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10397, PETRI_PLACES=270, PETRI_TRANSITIONS=664} [2024-06-03 19:49:23,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-03 19:49:23,682 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 664 transitions, 10397 flow [2024-06-03 19:49:23,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:23,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:23,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:23,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:49:23,682 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:23,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1971940483, now seen corresponding path program 8 times [2024-06-03 19:49:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:23,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167353304] [2024-06-03 19:49:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:24,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167353304] [2024-06-03 19:49:24,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167353304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:24,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:24,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461026311] [2024-06-03 19:49:24,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:24,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:24,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:24,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:24,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 664 transitions, 10397 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:24,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:24,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:24,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:26,632 INFO L124 PetriNetUnfolderBase]: 5344/7927 cut-off events. [2024-06-03 19:49:26,632 INFO L125 PetriNetUnfolderBase]: For 523328/523332 co-relation queries the response was YES. [2024-06-03 19:49:26,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74708 conditions, 7927 events. 5344/7927 cut-off events. For 523328/523332 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43747 event pairs, 1511 based on Foata normal form. 10/7932 useless extension candidates. Maximal degree in co-relation 74588. Up to 7171 conditions per place. [2024-06-03 19:49:26,738 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 608 selfloop transitions, 136 changer transitions 0/749 dead transitions. [2024-06-03 19:49:26,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 749 transitions, 13180 flow [2024-06-03 19:49:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:49:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:49:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 19:49:26,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-03 19:49:26,740 INFO L175 Difference]: Start difference. First operand has 270 places, 664 transitions, 10397 flow. Second operand 11 states and 202 transitions. [2024-06-03 19:49:26,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 749 transitions, 13180 flow [2024-06-03 19:49:27,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 749 transitions, 12741 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:27,745 INFO L231 Difference]: Finished difference. Result has 275 places, 700 transitions, 11002 flow [2024-06-03 19:49:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9976, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11002, PETRI_PLACES=275, PETRI_TRANSITIONS=700} [2024-06-03 19:49:27,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-03 19:49:27,746 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 700 transitions, 11002 flow [2024-06-03 19:49:27,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:27,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:49:27,747 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:27,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:27,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1774761, now seen corresponding path program 9 times [2024-06-03 19:49:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:27,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932189442] [2024-06-03 19:49:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:28,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932189442] [2024-06-03 19:49:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932189442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306723900] [2024-06-03 19:49:28,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:28,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:28,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 700 transitions, 11002 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:28,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:28,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:28,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:30,712 INFO L124 PetriNetUnfolderBase]: 5361/7952 cut-off events. [2024-06-03 19:49:30,712 INFO L125 PetriNetUnfolderBase]: For 539638/539650 co-relation queries the response was YES. [2024-06-03 19:49:30,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75707 conditions, 7952 events. 5361/7952 cut-off events. For 539638/539650 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43906 event pairs, 1193 based on Foata normal form. 12/7959 useless extension candidates. Maximal degree in co-relation 75585. Up to 7503 conditions per place. [2024-06-03 19:49:30,831 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 634 selfloop transitions, 94 changer transitions 0/733 dead transitions. [2024-06-03 19:49:30,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 733 transitions, 12801 flow [2024-06-03 19:49:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:49:30,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:49:30,833 INFO L175 Difference]: Start difference. First operand has 275 places, 700 transitions, 11002 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:49:30,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 733 transitions, 12801 flow [2024-06-03 19:49:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 733 transitions, 12457 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:31,953 INFO L231 Difference]: Finished difference. Result has 276 places, 702 transitions, 10986 flow [2024-06-03 19:49:31,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10986, PETRI_PLACES=276, PETRI_TRANSITIONS=702} [2024-06-03 19:49:31,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-03 19:49:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 702 transitions, 10986 flow [2024-06-03 19:49:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:31,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:49:31,955 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:31,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2087231653, now seen corresponding path program 9 times [2024-06-03 19:49:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081891077] [2024-06-03 19:49:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:32,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:32,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:32,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081891077] [2024-06-03 19:49:32,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081891077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:32,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:32,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118282803] [2024-06-03 19:49:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:32,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:33,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:33,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 702 transitions, 10986 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:33,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:33,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:35,152 INFO L124 PetriNetUnfolderBase]: 5566/8252 cut-off events. [2024-06-03 19:49:35,152 INFO L125 PetriNetUnfolderBase]: For 577450/577456 co-relation queries the response was YES. [2024-06-03 19:49:35,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78279 conditions, 8252 events. 5566/8252 cut-off events. For 577450/577456 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45848 event pairs, 1516 based on Foata normal form. 8/8255 useless extension candidates. Maximal degree in co-relation 78156. Up to 6766 conditions per place. [2024-06-03 19:49:35,256 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 564 selfloop transitions, 221 changer transitions 0/790 dead transitions. [2024-06-03 19:49:35,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 790 transitions, 14115 flow [2024-06-03 19:49:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:49:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:49:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-03 19:49:35,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-03 19:49:35,257 INFO L175 Difference]: Start difference. First operand has 276 places, 702 transitions, 10986 flow. Second operand 11 states and 212 transitions. [2024-06-03 19:49:35,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 790 transitions, 14115 flow [2024-06-03 19:49:36,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 790 transitions, 13796 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:36,091 INFO L231 Difference]: Finished difference. Result has 281 places, 727 transitions, 11640 flow [2024-06-03 19:49:36,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10686, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11640, PETRI_PLACES=281, PETRI_TRANSITIONS=727} [2024-06-03 19:49:36,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-03 19:49:36,096 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 727 transitions, 11640 flow [2024-06-03 19:49:36,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:36,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:36,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:36,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:49:36,097 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:36,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2087409283, now seen corresponding path program 10 times [2024-06-03 19:49:36,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:36,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834041812] [2024-06-03 19:49:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:36,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834041812] [2024-06-03 19:49:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834041812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709626067] [2024-06-03 19:49:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:37,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:37,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 727 transitions, 11640 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:37,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:37,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:37,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:39,115 INFO L124 PetriNetUnfolderBase]: 5579/8267 cut-off events. [2024-06-03 19:49:39,116 INFO L125 PetriNetUnfolderBase]: For 593856/593862 co-relation queries the response was YES. [2024-06-03 19:49:39,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80029 conditions, 8267 events. 5579/8267 cut-off events. For 593856/593862 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45728 event pairs, 999 based on Foata normal form. 10/8277 useless extension candidates. Maximal degree in co-relation 79904. Up to 6489 conditions per place. [2024-06-03 19:49:39,219 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 468 selfloop transitions, 312 changer transitions 0/785 dead transitions. [2024-06-03 19:49:39,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 785 transitions, 14265 flow [2024-06-03 19:49:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:49:39,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-03 19:49:39,220 INFO L175 Difference]: Start difference. First operand has 281 places, 727 transitions, 11640 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:49:39,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 785 transitions, 14265 flow [2024-06-03 19:49:40,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 785 transitions, 13844 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:40,110 INFO L231 Difference]: Finished difference. Result has 284 places, 734 transitions, 12196 flow [2024-06-03 19:49:40,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11245, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12196, PETRI_PLACES=284, PETRI_TRANSITIONS=734} [2024-06-03 19:49:40,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-03 19:49:40,111 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 734 transitions, 12196 flow [2024-06-03 19:49:40,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:40,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:40,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:40,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:49:40,112 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:40,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2087416227, now seen corresponding path program 2 times [2024-06-03 19:49:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:40,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964232753] [2024-06-03 19:49:40,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:40,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964232753] [2024-06-03 19:49:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964232753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:41,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:41,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:49:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951648624] [2024-06-03 19:49:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:49:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:49:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:49:41,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:41,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 734 transitions, 12196 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:41,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:41,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:41,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:42,990 INFO L124 PetriNetUnfolderBase]: 5601/8298 cut-off events. [2024-06-03 19:49:42,990 INFO L125 PetriNetUnfolderBase]: For 617859/617863 co-relation queries the response was YES. [2024-06-03 19:49:43,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82656 conditions, 8298 events. 5601/8298 cut-off events. For 617859/617863 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46061 event pairs, 1221 based on Foata normal form. 10/8308 useless extension candidates. Maximal degree in co-relation 82528. Up to 7637 conditions per place. [2024-06-03 19:49:43,101 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 665 selfloop transitions, 104 changer transitions 0/774 dead transitions. [2024-06-03 19:49:43,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 774 transitions, 14402 flow [2024-06-03 19:49:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:49:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:49:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 19:49:43,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:49:43,110 INFO L175 Difference]: Start difference. First operand has 284 places, 734 transitions, 12196 flow. Second operand 8 states and 160 transitions. [2024-06-03 19:49:43,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 774 transitions, 14402 flow [2024-06-03 19:49:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 774 transitions, 13792 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:44,214 INFO L231 Difference]: Finished difference. Result has 286 places, 737 transitions, 11937 flow [2024-06-03 19:49:44,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11586, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11937, PETRI_PLACES=286, PETRI_TRANSITIONS=737} [2024-06-03 19:49:44,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:49:44,215 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 737 transitions, 11937 flow [2024-06-03 19:49:44,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:44,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:44,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:49:44,216 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:44,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash 938294797, now seen corresponding path program 2 times [2024-06-03 19:49:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:44,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578975486] [2024-06-03 19:49:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:44,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:44,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578975486] [2024-06-03 19:49:44,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578975486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:44,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:44,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:49:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098443223] [2024-06-03 19:49:44,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:49:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:49:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:49:44,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:44,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 737 transitions, 11937 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:44,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:44,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:44,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:46,679 INFO L124 PetriNetUnfolderBase]: 5372/8030 cut-off events. [2024-06-03 19:49:46,679 INFO L125 PetriNetUnfolderBase]: For 632653/632764 co-relation queries the response was YES. [2024-06-03 19:49:46,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80118 conditions, 8030 events. 5372/8030 cut-off events. For 632653/632764 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 45310 event pairs, 1165 based on Foata normal form. 16/8016 useless extension candidates. Maximal degree in co-relation 79989. Up to 7577 conditions per place. [2024-06-03 19:49:46,793 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 661 selfloop transitions, 59 changer transitions 0/756 dead transitions. [2024-06-03 19:49:46,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 756 transitions, 13681 flow [2024-06-03 19:49:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:49:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:49:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 19:49:46,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:49:46,808 INFO L175 Difference]: Start difference. First operand has 286 places, 737 transitions, 11937 flow. Second operand 6 states and 116 transitions. [2024-06-03 19:49:46,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 756 transitions, 13681 flow [2024-06-03 19:49:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 756 transitions, 13360 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-03 19:49:47,805 INFO L231 Difference]: Finished difference. Result has 286 places, 742 transitions, 11898 flow [2024-06-03 19:49:47,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11620, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11898, PETRI_PLACES=286, PETRI_TRANSITIONS=742} [2024-06-03 19:49:47,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:49:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 742 transitions, 11898 flow [2024-06-03 19:49:47,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:47,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:47,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:49:47,807 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:47,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 518601857, now seen corresponding path program 3 times [2024-06-03 19:49:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136287134] [2024-06-03 19:49:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:48,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:48,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136287134] [2024-06-03 19:49:48,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136287134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:48,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:48,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:48,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108396141] [2024-06-03 19:49:48,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:48,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:48,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 742 transitions, 11898 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:48,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:48,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:50,921 INFO L124 PetriNetUnfolderBase]: 5636/8358 cut-off events. [2024-06-03 19:49:50,922 INFO L125 PetriNetUnfolderBase]: For 655024/655024 co-relation queries the response was YES. [2024-06-03 19:49:50,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82364 conditions, 8358 events. 5636/8358 cut-off events. For 655024/655024 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46531 event pairs, 1640 based on Foata normal form. 6/8364 useless extension candidates. Maximal degree in co-relation 82234. Up to 8013 conditions per place. [2024-06-03 19:49:51,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 729 selfloop transitions, 39 changer transitions 0/773 dead transitions. [2024-06-03 19:49:51,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 773 transitions, 13858 flow [2024-06-03 19:49:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:49:51,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:49:51,044 INFO L175 Difference]: Start difference. First operand has 286 places, 742 transitions, 11898 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:49:51,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 773 transitions, 13858 flow [2024-06-03 19:49:52,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 773 transitions, 13749 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:49:52,100 INFO L231 Difference]: Finished difference. Result has 291 places, 745 transitions, 12014 flow [2024-06-03 19:49:52,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11791, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12014, PETRI_PLACES=291, PETRI_TRANSITIONS=745} [2024-06-03 19:49:52,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 19:49:52,101 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 745 transitions, 12014 flow [2024-06-03 19:49:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:52,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:52,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:52,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:49:52,101 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:52,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1767607745, now seen corresponding path program 4 times [2024-06-03 19:49:52,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:52,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141721064] [2024-06-03 19:49:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:52,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:53,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141721064] [2024-06-03 19:49:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141721064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:53,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:53,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682000498] [2024-06-03 19:49:53,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:53,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:53,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:53,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 745 transitions, 12014 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:53,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:53,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:53,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:55,223 INFO L124 PetriNetUnfolderBase]: 5663/8401 cut-off events. [2024-06-03 19:49:55,223 INFO L125 PetriNetUnfolderBase]: For 662420/662420 co-relation queries the response was YES. [2024-06-03 19:49:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83094 conditions, 8401 events. 5663/8401 cut-off events. For 662420/662420 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 46883 event pairs, 1632 based on Foata normal form. 6/8407 useless extension candidates. Maximal degree in co-relation 82964. Up to 7987 conditions per place. [2024-06-03 19:49:55,513 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 727 selfloop transitions, 48 changer transitions 0/780 dead transitions. [2024-06-03 19:49:55,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 780 transitions, 14118 flow [2024-06-03 19:49:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:49:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:49:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:49:55,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:49:55,514 INFO L175 Difference]: Start difference. First operand has 291 places, 745 transitions, 12014 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:49:55,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 780 transitions, 14118 flow [2024-06-03 19:49:56,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 780 transitions, 13925 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:56,381 INFO L231 Difference]: Finished difference. Result has 292 places, 748 transitions, 12067 flow [2024-06-03 19:49:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11821, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12067, PETRI_PLACES=292, PETRI_TRANSITIONS=748} [2024-06-03 19:49:56,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-03 19:49:56,382 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 748 transitions, 12067 flow [2024-06-03 19:49:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:56,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:56,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:49:56,383 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:56,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1199314527, now seen corresponding path program 11 times [2024-06-03 19:49:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447930765] [2024-06-03 19:49:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:57,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:57,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447930765] [2024-06-03 19:49:57,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447930765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:57,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:57,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:57,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629911355] [2024-06-03 19:49:57,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:57,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:57,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:57,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 748 transitions, 12067 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:57,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:57,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:57,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:59,533 INFO L124 PetriNetUnfolderBase]: 5699/8453 cut-off events. [2024-06-03 19:49:59,533 INFO L125 PetriNetUnfolderBase]: For 686373/686373 co-relation queries the response was YES. [2024-06-03 19:49:59,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84189 conditions, 8453 events. 5699/8453 cut-off events. For 686373/686373 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47146 event pairs, 1631 based on Foata normal form. 6/8459 useless extension candidates. Maximal degree in co-relation 84058. Up to 8091 conditions per place. [2024-06-03 19:49:59,651 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 743 selfloop transitions, 38 changer transitions 0/786 dead transitions. [2024-06-03 19:49:59,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 786 transitions, 14143 flow [2024-06-03 19:49:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:49:59,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:49:59,652 INFO L175 Difference]: Start difference. First operand has 292 places, 748 transitions, 12067 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:49:59,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 786 transitions, 14143 flow [2024-06-03 19:50:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 786 transitions, 13925 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-03 19:50:00,662 INFO L231 Difference]: Finished difference. Result has 295 places, 752 transitions, 12112 flow [2024-06-03 19:50:00,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11849, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12112, PETRI_PLACES=295, PETRI_TRANSITIONS=752} [2024-06-03 19:50:00,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-03 19:50:00,663 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 752 transitions, 12112 flow [2024-06-03 19:50:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:00,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:00,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:00,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:50:00,664 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:00,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1191033621, now seen corresponding path program 1 times [2024-06-03 19:50:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:00,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237390098] [2024-06-03 19:50:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:01,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237390098] [2024-06-03 19:50:01,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237390098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:01,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:01,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178369125] [2024-06-03 19:50:01,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:01,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:01,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:01,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 752 transitions, 12112 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:01,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:01,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:01,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:03,839 INFO L124 PetriNetUnfolderBase]: 5702/8457 cut-off events. [2024-06-03 19:50:03,839 INFO L125 PetriNetUnfolderBase]: For 697854/697854 co-relation queries the response was YES. [2024-06-03 19:50:03,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84521 conditions, 8457 events. 5702/8457 cut-off events. For 697854/697854 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47163 event pairs, 1644 based on Foata normal form. 3/8460 useless extension candidates. Maximal degree in co-relation 84389. Up to 8089 conditions per place. [2024-06-03 19:50:03,949 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 733 selfloop transitions, 48 changer transitions 0/786 dead transitions. [2024-06-03 19:50:03,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 786 transitions, 14162 flow [2024-06-03 19:50:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:50:03,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:50:03,950 INFO L175 Difference]: Start difference. First operand has 295 places, 752 transitions, 12112 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:50:03,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 786 transitions, 14162 flow [2024-06-03 19:50:05,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 786 transitions, 13933 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:05,110 INFO L231 Difference]: Finished difference. Result has 297 places, 756 transitions, 12162 flow [2024-06-03 19:50:05,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11883, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12162, PETRI_PLACES=297, PETRI_TRANSITIONS=756} [2024-06-03 19:50:05,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 19:50:05,111 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 756 transitions, 12162 flow [2024-06-03 19:50:05,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:05,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:05,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:05,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:50:05,112 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:05,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1427215677, now seen corresponding path program 12 times [2024-06-03 19:50:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:05,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699159375] [2024-06-03 19:50:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699159375] [2024-06-03 19:50:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699159375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:06,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:06,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:06,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797921818] [2024-06-03 19:50:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:06,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:06,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:06,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:06,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 756 transitions, 12162 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:06,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:06,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:06,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:08,157 INFO L124 PetriNetUnfolderBase]: 5738/8509 cut-off events. [2024-06-03 19:50:08,157 INFO L125 PetriNetUnfolderBase]: For 726251/726251 co-relation queries the response was YES. [2024-06-03 19:50:08,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85297 conditions, 8509 events. 5738/8509 cut-off events. For 726251/726251 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47521 event pairs, 1616 based on Foata normal form. 6/8515 useless extension candidates. Maximal degree in co-relation 85164. Up to 7788 conditions per place. [2024-06-03 19:50:08,263 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 707 selfloop transitions, 93 changer transitions 0/805 dead transitions. [2024-06-03 19:50:08,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 805 transitions, 14551 flow [2024-06-03 19:50:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:50:08,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:50:08,265 INFO L175 Difference]: Start difference. First operand has 297 places, 756 transitions, 12162 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:50:08,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 805 transitions, 14551 flow [2024-06-03 19:50:09,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 805 transitions, 14352 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:09,327 INFO L231 Difference]: Finished difference. Result has 299 places, 760 transitions, 12346 flow [2024-06-03 19:50:09,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11963, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12346, PETRI_PLACES=299, PETRI_TRANSITIONS=760} [2024-06-03 19:50:09,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-03 19:50:09,328 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 760 transitions, 12346 flow [2024-06-03 19:50:09,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:09,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:09,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:50:09,328 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:09,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1767423171, now seen corresponding path program 13 times [2024-06-03 19:50:09,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:09,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314491630] [2024-06-03 19:50:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314491630] [2024-06-03 19:50:10,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314491630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:10,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:10,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999664193] [2024-06-03 19:50:10,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:10,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:10,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:10,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 760 transitions, 12346 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:10,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:10,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:10,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:12,528 INFO L124 PetriNetUnfolderBase]: 5765/8548 cut-off events. [2024-06-03 19:50:12,529 INFO L125 PetriNetUnfolderBase]: For 749673/749673 co-relation queries the response was YES. [2024-06-03 19:50:12,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86757 conditions, 8548 events. 5765/8548 cut-off events. For 749673/749673 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47693 event pairs, 1616 based on Foata normal form. 6/8554 useless extension candidates. Maximal degree in co-relation 86623. Up to 7740 conditions per place. [2024-06-03 19:50:12,635 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 716 selfloop transitions, 94 changer transitions 0/815 dead transitions. [2024-06-03 19:50:12,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 815 transitions, 15087 flow [2024-06-03 19:50:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:50:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:50:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:50:12,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:50:12,636 INFO L175 Difference]: Start difference. First operand has 299 places, 760 transitions, 12346 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:50:12,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 815 transitions, 15087 flow [2024-06-03 19:50:13,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 815 transitions, 14667 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:13,960 INFO L231 Difference]: Finished difference. Result has 303 places, 768 transitions, 12489 flow [2024-06-03 19:50:13,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11926, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12489, PETRI_PLACES=303, PETRI_TRANSITIONS=768} [2024-06-03 19:50:13,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-03 19:50:13,961 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 768 transitions, 12489 flow [2024-06-03 19:50:13,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:13,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:13,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:13,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:50:13,962 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:13,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1427393431, now seen corresponding path program 10 times [2024-06-03 19:50:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:13,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850211044] [2024-06-03 19:50:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:14,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850211044] [2024-06-03 19:50:14,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850211044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:14,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:14,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:14,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980775371] [2024-06-03 19:50:14,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:14,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:15,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:15,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 768 transitions, 12489 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:15,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:15,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:15,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:17,064 INFO L124 PetriNetUnfolderBase]: 5757/8536 cut-off events. [2024-06-03 19:50:17,064 INFO L125 PetriNetUnfolderBase]: For 767178/767178 co-relation queries the response was YES. [2024-06-03 19:50:17,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86838 conditions, 8536 events. 5757/8536 cut-off events. For 767178/767178 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 47673 event pairs, 1647 based on Foata normal form. 4/8540 useless extension candidates. Maximal degree in co-relation 86702. Up to 8270 conditions per place. [2024-06-03 19:50:17,178 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 766 selfloop transitions, 26 changer transitions 0/797 dead transitions. [2024-06-03 19:50:17,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 797 transitions, 14396 flow [2024-06-03 19:50:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:50:17,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:50:17,180 INFO L175 Difference]: Start difference. First operand has 303 places, 768 transitions, 12489 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:50:17,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 797 transitions, 14396 flow [2024-06-03 19:50:18,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 797 transitions, 14042 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-06-03 19:50:18,436 INFO L231 Difference]: Finished difference. Result has 306 places, 770 transitions, 12350 flow [2024-06-03 19:50:18,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12135, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12350, PETRI_PLACES=306, PETRI_TRANSITIONS=770} [2024-06-03 19:50:18,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-03 19:50:18,438 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 770 transitions, 12350 flow [2024-06-03 19:50:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:18,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:18,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:50:18,440 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:18,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1190736703, now seen corresponding path program 5 times [2024-06-03 19:50:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694508103] [2024-06-03 19:50:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694508103] [2024-06-03 19:50:19,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694508103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:19,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:19,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030178992] [2024-06-03 19:50:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:19,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:19,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 770 transitions, 12350 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:19,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:19,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:19,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:21,539 INFO L124 PetriNetUnfolderBase]: 5761/8542 cut-off events. [2024-06-03 19:50:21,540 INFO L125 PetriNetUnfolderBase]: For 779908/779908 co-relation queries the response was YES. [2024-06-03 19:50:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86411 conditions, 8542 events. 5761/8542 cut-off events. For 779908/779908 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47776 event pairs, 1622 based on Foata normal form. 6/8548 useless extension candidates. Maximal degree in co-relation 86273. Up to 8225 conditions per place. [2024-06-03 19:50:21,657 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 763 selfloop transitions, 30 changer transitions 0/798 dead transitions. [2024-06-03 19:50:21,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 798 transitions, 14358 flow [2024-06-03 19:50:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:50:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:50:21,659 INFO L175 Difference]: Start difference. First operand has 306 places, 770 transitions, 12350 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:50:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 798 transitions, 14358 flow [2024-06-03 19:50:22,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 798 transitions, 14161 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:22,834 INFO L231 Difference]: Finished difference. Result has 308 places, 773 transitions, 12383 flow [2024-06-03 19:50:22,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12153, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12383, PETRI_PLACES=308, PETRI_TRANSITIONS=773} [2024-06-03 19:50:22,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-03 19:50:22,835 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 773 transitions, 12383 flow [2024-06-03 19:50:22,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:22,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:22,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:22,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:50:22,836 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1436805487, now seen corresponding path program 3 times [2024-06-03 19:50:22,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:22,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393908131] [2024-06-03 19:50:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:23,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:23,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393908131] [2024-06-03 19:50:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393908131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:23,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:23,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:50:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449636485] [2024-06-03 19:50:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:50:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:50:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:50:23,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:23,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 773 transitions, 12383 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:23,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:23,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:23,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:25,373 INFO L124 PetriNetUnfolderBase]: 5501/8237 cut-off events. [2024-06-03 19:50:25,373 INFO L125 PetriNetUnfolderBase]: For 797697/797815 co-relation queries the response was YES. [2024-06-03 19:50:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84146 conditions, 8237 events. 5501/8237 cut-off events. For 797697/797815 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 47023 event pairs, 1573 based on Foata normal form. 23/8224 useless extension candidates. Maximal degree in co-relation 84007. Up to 7826 conditions per place. [2024-06-03 19:50:25,484 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 728 selfloop transitions, 14 changer transitions 0/781 dead transitions. [2024-06-03 19:50:25,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 781 transitions, 13905 flow [2024-06-03 19:50:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:50:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:50:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 19:50:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-03 19:50:25,490 INFO L175 Difference]: Start difference. First operand has 308 places, 773 transitions, 12383 flow. Second operand 6 states and 107 transitions. [2024-06-03 19:50:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 781 transitions, 13905 flow [2024-06-03 19:50:26,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 781 transitions, 13677 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:26,665 INFO L231 Difference]: Finished difference. Result has 307 places, 773 transitions, 12191 flow [2024-06-03 19:50:26,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12155, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12191, PETRI_PLACES=307, PETRI_TRANSITIONS=773} [2024-06-03 19:50:26,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-03 19:50:26,666 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 773 transitions, 12191 flow [2024-06-03 19:50:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:26,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:26,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:50:26,667 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:26,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash 944014669, now seen corresponding path program 1 times [2024-06-03 19:50:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:26,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581123684] [2024-06-03 19:50:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:27,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:27,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581123684] [2024-06-03 19:50:27,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581123684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:27,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:27,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:50:27,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906478631] [2024-06-03 19:50:27,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:50:27,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:50:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:50:27,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:27,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 773 transitions, 12191 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:27,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:27,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:27,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:29,403 INFO L124 PetriNetUnfolderBase]: 5754/8533 cut-off events. [2024-06-03 19:50:29,404 INFO L125 PetriNetUnfolderBase]: For 798353/798353 co-relation queries the response was YES. [2024-06-03 19:50:29,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86156 conditions, 8533 events. 5754/8533 cut-off events. For 798353/798353 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 47705 event pairs, 1647 based on Foata normal form. 3/8536 useless extension candidates. Maximal degree in co-relation 86016. Up to 8276 conditions per place. [2024-06-03 19:50:29,513 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 758 selfloop transitions, 25 changer transitions 0/788 dead transitions. [2024-06-03 19:50:29,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 788 transitions, 13987 flow [2024-06-03 19:50:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:50:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:50:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 19:50:29,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:50:29,515 INFO L175 Difference]: Start difference. First operand has 307 places, 773 transitions, 12191 flow. Second operand 6 states and 112 transitions. [2024-06-03 19:50:29,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 788 transitions, 13987 flow [2024-06-03 19:50:30,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 788 transitions, 13927 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:30,774 INFO L231 Difference]: Finished difference. Result has 308 places, 776 transitions, 12240 flow [2024-06-03 19:50:30,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12131, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12240, PETRI_PLACES=308, PETRI_TRANSITIONS=776} [2024-06-03 19:50:30,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-03 19:50:30,775 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 776 transitions, 12240 flow [2024-06-03 19:50:30,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:30,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:30,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:30,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:50:30,775 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:30,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1436811439, now seen corresponding path program 2 times [2024-06-03 19:50:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:30,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038795142] [2024-06-03 19:50:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:30,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038795142] [2024-06-03 19:50:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038795142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:31,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:31,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:50:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398779882] [2024-06-03 19:50:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:31,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:50:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:50:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:50:31,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:31,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 776 transitions, 12240 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:31,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:31,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:31,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:33,502 INFO L124 PetriNetUnfolderBase]: 5722/8486 cut-off events. [2024-06-03 19:50:33,503 INFO L125 PetriNetUnfolderBase]: For 813750/813752 co-relation queries the response was YES. [2024-06-03 19:50:33,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86180 conditions, 8486 events. 5722/8486 cut-off events. For 813750/813752 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 47371 event pairs, 1658 based on Foata normal form. 1/8487 useless extension candidates. Maximal degree in co-relation 86039. Up to 8230 conditions per place. [2024-06-03 19:50:33,611 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 753 selfloop transitions, 26 changer transitions 0/784 dead transitions. [2024-06-03 19:50:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 784 transitions, 13836 flow [2024-06-03 19:50:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:50:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:50:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 19:50:33,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-03 19:50:33,612 INFO L175 Difference]: Start difference. First operand has 308 places, 776 transitions, 12240 flow. Second operand 6 states and 109 transitions. [2024-06-03 19:50:33,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 784 transitions, 13836 flow [2024-06-03 19:50:34,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 784 transitions, 13782 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:50:34,865 INFO L231 Difference]: Finished difference. Result has 310 places, 776 transitions, 12244 flow [2024-06-03 19:50:34,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12186, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12244, PETRI_PLACES=310, PETRI_TRANSITIONS=776} [2024-06-03 19:50:34,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 19:50:34,866 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 776 transitions, 12244 flow [2024-06-03 19:50:34,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:34,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:34,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:50:34,866 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:34,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 949736525, now seen corresponding path program 1 times [2024-06-03 19:50:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429311048] [2024-06-03 19:50:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429311048] [2024-06-03 19:50:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429311048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:35,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:35,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:50:35,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829982865] [2024-06-03 19:50:35,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:50:35,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:50:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:50:35,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:35,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 776 transitions, 12244 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:35,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:35,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:35,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:37,716 INFO L124 PetriNetUnfolderBase]: 5622/8339 cut-off events. [2024-06-03 19:50:37,716 INFO L125 PetriNetUnfolderBase]: For 854080/854193 co-relation queries the response was YES. [2024-06-03 19:50:37,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85590 conditions, 8339 events. 5622/8339 cut-off events. For 854080/854193 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46725 event pairs, 1653 based on Foata normal form. 24/8327 useless extension candidates. Maximal degree in co-relation 85448. Up to 8029 conditions per place. [2024-06-03 19:50:37,827 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 738 selfloop transitions, 15 changer transitions 0/790 dead transitions. [2024-06-03 19:50:37,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 790 transitions, 13826 flow [2024-06-03 19:50:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:50:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:50:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:50:37,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-03 19:50:37,828 INFO L175 Difference]: Start difference. First operand has 310 places, 776 transitions, 12244 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:50:37,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 790 transitions, 13826 flow [2024-06-03 19:50:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 790 transitions, 13758 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:39,112 INFO L231 Difference]: Finished difference. Result has 312 places, 779 transitions, 12250 flow [2024-06-03 19:50:39,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12176, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12250, PETRI_PLACES=312, PETRI_TRANSITIONS=779} [2024-06-03 19:50:39,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-03 19:50:39,113 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 779 transitions, 12250 flow [2024-06-03 19:50:39,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:39,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:39,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:50:39,114 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:39,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash -705293403, now seen corresponding path program 1 times [2024-06-03 19:50:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:39,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914091827] [2024-06-03 19:50:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:39,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:39,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914091827] [2024-06-03 19:50:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914091827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:39,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:39,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115260274] [2024-06-03 19:50:39,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:39,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:39,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:39,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:39,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:39,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 779 transitions, 12250 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:39,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:39,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:42,667 INFO L124 PetriNetUnfolderBase]: 6331/9385 cut-off events. [2024-06-03 19:50:42,667 INFO L125 PetriNetUnfolderBase]: For 1113157/1113180 co-relation queries the response was YES. [2024-06-03 19:50:42,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104640 conditions, 9385 events. 6331/9385 cut-off events. For 1113157/1113180 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53544 event pairs, 1109 based on Foata normal form. 30/9383 useless extension candidates. Maximal degree in co-relation 104497. Up to 5620 conditions per place. [2024-06-03 19:50:42,800 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 248 changer transitions 0/857 dead transitions. [2024-06-03 19:50:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 857 transitions, 15884 flow [2024-06-03 19:50:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:50:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:50:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 19:50:42,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:50:42,801 INFO L175 Difference]: Start difference. First operand has 312 places, 779 transitions, 12250 flow. Second operand 11 states and 231 transitions. [2024-06-03 19:50:42,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 857 transitions, 15884 flow [2024-06-03 19:50:44,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 857 transitions, 15832 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:44,474 INFO L231 Difference]: Finished difference. Result has 321 places, 787 transitions, 13216 flow [2024-06-03 19:50:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12198, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13216, PETRI_PLACES=321, PETRI_TRANSITIONS=787} [2024-06-03 19:50:44,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-03 19:50:44,475 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 787 transitions, 13216 flow [2024-06-03 19:50:44,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:44,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:44,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:50:44,475 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:44,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash -635781003, now seen corresponding path program 2 times [2024-06-03 19:50:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263039148] [2024-06-03 19:50:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:45,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:45,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263039148] [2024-06-03 19:50:45,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263039148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:45,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:45,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:45,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594227605] [2024-06-03 19:50:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:45,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:45,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:45,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:45,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 787 transitions, 13216 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:45,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:45,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:45,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:48,348 INFO L124 PetriNetUnfolderBase]: 7153/10705 cut-off events. [2024-06-03 19:50:48,348 INFO L125 PetriNetUnfolderBase]: For 1482721/1482736 co-relation queries the response was YES. [2024-06-03 19:50:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130649 conditions, 10705 events. 7153/10705 cut-off events. For 1482721/1482736 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63585 event pairs, 1639 based on Foata normal form. 46/10735 useless extension candidates. Maximal degree in co-relation 130502. Up to 7239 conditions per place. [2024-06-03 19:50:48,503 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 618 selfloop transitions, 264 changer transitions 0/887 dead transitions. [2024-06-03 19:50:48,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 887 transitions, 17528 flow [2024-06-03 19:50:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:50:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:50:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 19:50:48,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-03 19:50:48,505 INFO L175 Difference]: Start difference. First operand has 321 places, 787 transitions, 13216 flow. Second operand 12 states and 248 transitions. [2024-06-03 19:50:48,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 887 transitions, 17528 flow [2024-06-03 19:50:50,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 887 transitions, 16934 flow, removed 165 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:50,805 INFO L231 Difference]: Finished difference. Result has 330 places, 801 transitions, 14047 flow [2024-06-03 19:50:50,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12796, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14047, PETRI_PLACES=330, PETRI_TRANSITIONS=801} [2024-06-03 19:50:50,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-03 19:50:50,806 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 801 transitions, 14047 flow [2024-06-03 19:50:50,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:50,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:50,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:50,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:50:50,807 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:50,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:50,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1014784071, now seen corresponding path program 3 times [2024-06-03 19:50:50,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:50,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396868278] [2024-06-03 19:50:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:50,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396868278] [2024-06-03 19:50:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396868278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973495296] [2024-06-03 19:50:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:51,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:51,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:51,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:51,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 801 transitions, 14047 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:51,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:51,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:51,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:55,930 INFO L124 PetriNetUnfolderBase]: 7498/11262 cut-off events. [2024-06-03 19:50:55,930 INFO L125 PetriNetUnfolderBase]: For 1665412/1665422 co-relation queries the response was YES. [2024-06-03 19:50:56,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141291 conditions, 11262 events. 7498/11262 cut-off events. For 1665412/1665422 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 68063 event pairs, 2009 based on Foata normal form. 42/11288 useless extension candidates. Maximal degree in co-relation 141140. Up to 8478 conditions per place. [2024-06-03 19:50:56,121 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 629 selfloop transitions, 252 changer transitions 0/886 dead transitions. [2024-06-03 19:50:56,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 886 transitions, 17857 flow [2024-06-03 19:50:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:50:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:50:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 19:50:56,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-03 19:50:56,123 INFO L175 Difference]: Start difference. First operand has 330 places, 801 transitions, 14047 flow. Second operand 12 states and 244 transitions. [2024-06-03 19:50:56,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 886 transitions, 17857 flow [2024-06-03 19:50:59,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 886 transitions, 17417 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:59,116 INFO L231 Difference]: Finished difference. Result has 336 places, 807 transitions, 14532 flow [2024-06-03 19:50:59,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13607, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14532, PETRI_PLACES=336, PETRI_TRANSITIONS=807} [2024-06-03 19:50:59,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-03 19:50:59,117 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 807 transitions, 14532 flow [2024-06-03 19:50:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:59,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:59,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:59,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:50:59,118 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:59,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1014780351, now seen corresponding path program 4 times [2024-06-03 19:50:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:59,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414959817] [2024-06-03 19:50:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:59,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:59,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:59,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414959817] [2024-06-03 19:50:59,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414959817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:59,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:59,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097458246] [2024-06-03 19:50:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:00,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:00,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 807 transitions, 14532 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:00,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:00,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:00,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:03,807 INFO L124 PetriNetUnfolderBase]: 7486/11252 cut-off events. [2024-06-03 19:51:03,807 INFO L125 PetriNetUnfolderBase]: For 1644803/1644813 co-relation queries the response was YES. [2024-06-03 19:51:04,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139323 conditions, 11252 events. 7486/11252 cut-off events. For 1644803/1644813 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 67875 event pairs, 2050 based on Foata normal form. 50/11286 useless extension candidates. Maximal degree in co-relation 139169. Up to 9117 conditions per place. [2024-06-03 19:51:04,081 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 604 selfloop transitions, 272 changer transitions 0/881 dead transitions. [2024-06-03 19:51:04,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 881 transitions, 17755 flow [2024-06-03 19:51:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:51:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:51:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-03 19:51:04,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46705426356589147 [2024-06-03 19:51:04,082 INFO L175 Difference]: Start difference. First operand has 336 places, 807 transitions, 14532 flow. Second operand 12 states and 241 transitions. [2024-06-03 19:51:04,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 881 transitions, 17755 flow [2024-06-03 19:51:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 881 transitions, 17315 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-03 19:51:07,571 INFO L231 Difference]: Finished difference. Result has 340 places, 809 transitions, 14824 flow [2024-06-03 19:51:07,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14092, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14824, PETRI_PLACES=340, PETRI_TRANSITIONS=809} [2024-06-03 19:51:07,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-03 19:51:07,572 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 809 transitions, 14824 flow [2024-06-03 19:51:07,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:07,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:07,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:07,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:51:07,573 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:07,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2125991879, now seen corresponding path program 5 times [2024-06-03 19:51:07,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:07,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309610422] [2024-06-03 19:51:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:07,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309610422] [2024-06-03 19:51:08,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309610422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:08,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:08,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:51:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9069455] [2024-06-03 19:51:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:51:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:51:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:51:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:08,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 809 transitions, 14824 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:08,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:08,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:08,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:13,175 INFO L124 PetriNetUnfolderBase]: 8907/13496 cut-off events. [2024-06-03 19:51:13,175 INFO L125 PetriNetUnfolderBase]: For 2135709/2135711 co-relation queries the response was YES. [2024-06-03 19:51:13,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178465 conditions, 13496 events. 8907/13496 cut-off events. For 2135709/2135711 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 85838 event pairs, 2451 based on Foata normal form. 42/13538 useless extension candidates. Maximal degree in co-relation 178309. Up to 10104 conditions per place. [2024-06-03 19:51:13,580 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 701 selfloop transitions, 197 changer transitions 0/903 dead transitions. [2024-06-03 19:51:13,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 903 transitions, 18998 flow [2024-06-03 19:51:13,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:51:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:51:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 19:51:13,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-03 19:51:13,582 INFO L175 Difference]: Start difference. First operand has 340 places, 809 transitions, 14824 flow. Second operand 12 states and 244 transitions. [2024-06-03 19:51:13,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 903 transitions, 18998 flow [2024-06-03 19:51:17,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 903 transitions, 18334 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-03 19:51:17,457 INFO L231 Difference]: Finished difference. Result has 345 places, 832 transitions, 15759 flow [2024-06-03 19:51:17,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14261, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15759, PETRI_PLACES=345, PETRI_TRANSITIONS=832} [2024-06-03 19:51:17,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-03 19:51:17,459 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 832 transitions, 15759 flow [2024-06-03 19:51:17,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:17,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:17,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:51:17,459 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:17,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2124114209, now seen corresponding path program 6 times [2024-06-03 19:51:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:17,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576227159] [2024-06-03 19:51:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:18,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576227159] [2024-06-03 19:51:18,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576227159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:18,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:51:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801833548] [2024-06-03 19:51:18,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:18,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:51:18,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:51:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:51:18,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:18,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 832 transitions, 15759 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:18,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:18,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:23,537 INFO L124 PetriNetUnfolderBase]: 9125/13862 cut-off events. [2024-06-03 19:51:23,538 INFO L125 PetriNetUnfolderBase]: For 2275794/2275796 co-relation queries the response was YES. [2024-06-03 19:51:23,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181654 conditions, 13862 events. 9125/13862 cut-off events. For 2275794/2275796 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 89031 event pairs, 2832 based on Foata normal form. 74/13936 useless extension candidates. Maximal degree in co-relation 181495. Up to 12100 conditions per place. [2024-06-03 19:51:23,749 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 683 selfloop transitions, 206 changer transitions 0/894 dead transitions. [2024-06-03 19:51:23,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 894 transitions, 18517 flow [2024-06-03 19:51:23,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 19:51:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 19:51:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 252 transitions. [2024-06-03 19:51:23,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45080500894454384 [2024-06-03 19:51:23,751 INFO L175 Difference]: Start difference. First operand has 345 places, 832 transitions, 15759 flow. Second operand 13 states and 252 transitions. [2024-06-03 19:51:23,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 894 transitions, 18517 flow [2024-06-03 19:51:27,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 894 transitions, 18148 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-03 19:51:27,952 INFO L231 Difference]: Finished difference. Result has 351 places, 836 transitions, 16089 flow [2024-06-03 19:51:27,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15390, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16089, PETRI_PLACES=351, PETRI_TRANSITIONS=836} [2024-06-03 19:51:27,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-03 19:51:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 836 transitions, 16089 flow [2024-06-03 19:51:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:27,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:27,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:51:27,954 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:27,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:27,954 INFO L85 PathProgramCache]: Analyzing trace with hash -856660751, now seen corresponding path program 7 times [2024-06-03 19:51:27,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:27,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783877008] [2024-06-03 19:51:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:27,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:29,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:29,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783877008] [2024-06-03 19:51:29,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783877008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:29,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:29,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:51:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376463710] [2024-06-03 19:51:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:51:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:51:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:51:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:29,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 836 transitions, 16089 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:29,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:29,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:29,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:34,045 INFO L124 PetriNetUnfolderBase]: 9175/13950 cut-off events. [2024-06-03 19:51:34,045 INFO L125 PetriNetUnfolderBase]: For 2182198/2182200 co-relation queries the response was YES. [2024-06-03 19:51:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180640 conditions, 13950 events. 9175/13950 cut-off events. For 2182198/2182200 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 89565 event pairs, 2720 based on Foata normal form. 58/14008 useless extension candidates. Maximal degree in co-relation 180479. Up to 11116 conditions per place. [2024-06-03 19:51:34,259 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 710 selfloop transitions, 190 changer transitions 0/905 dead transitions. [2024-06-03 19:51:34,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 905 transitions, 19337 flow [2024-06-03 19:51:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:51:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:51:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-03 19:51:34,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:51:34,261 INFO L175 Difference]: Start difference. First operand has 351 places, 836 transitions, 16089 flow. Second operand 12 states and 237 transitions. [2024-06-03 19:51:34,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 905 transitions, 19337 flow [2024-06-03 19:51:39,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 905 transitions, 18830 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-06-03 19:51:39,692 INFO L231 Difference]: Finished difference. Result has 352 places, 846 transitions, 16594 flow [2024-06-03 19:51:39,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15582, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16594, PETRI_PLACES=352, PETRI_TRANSITIONS=846} [2024-06-03 19:51:39,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:51:39,693 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 846 transitions, 16594 flow [2024-06-03 19:51:39,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:39,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:39,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:39,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:51:39,694 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:39,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1158357993, now seen corresponding path program 8 times [2024-06-03 19:51:39,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:39,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137226941] [2024-06-03 19:51:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:39,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:40,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137226941] [2024-06-03 19:51:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137226941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:40,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:40,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:51:40,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196655704] [2024-06-03 19:51:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:51:40,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:51:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:51:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:40,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 846 transitions, 16594 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:40,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:40,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:40,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:45,819 INFO L124 PetriNetUnfolderBase]: 9498/14465 cut-off events. [2024-06-03 19:51:45,820 INFO L125 PetriNetUnfolderBase]: For 2210340/2210346 co-relation queries the response was YES. [2024-06-03 19:51:46,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188420 conditions, 14465 events. 9498/14465 cut-off events. For 2210340/2210346 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 93994 event pairs, 2989 based on Foata normal form. 30/14495 useless extension candidates. Maximal degree in co-relation 188257. Up to 12159 conditions per place. [2024-06-03 19:51:46,080 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 689 selfloop transitions, 248 changer transitions 0/942 dead transitions. [2024-06-03 19:51:46,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 942 transitions, 20601 flow [2024-06-03 19:51:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:51:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:51:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 19:51:46,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:51:46,081 INFO L175 Difference]: Start difference. First operand has 352 places, 846 transitions, 16594 flow. Second operand 11 states and 231 transitions. [2024-06-03 19:51:46,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 942 transitions, 20601 flow