./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix003.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/mix003.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix003.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix003.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:46:55,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:46:55,393 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:46:55,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:46:55,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:46:55,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:46:55,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:46:55,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:46:55,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:46:55,430 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:46:55,430 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:46:55,431 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:46:55,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:46:55,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:46:55,434 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:46:55,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:46:55,436 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:46:55,439 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:46:55,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:46:55,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:46:55,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:46:55,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:46:55,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:46:55,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:46:55,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:46:55,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:46:55,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:46:55,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:46:55,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:46:55,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:46:55,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:46:55,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:46:55,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:46:55,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:46:55,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:46:55,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:46:55,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:46:55,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:46:55,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:46:55,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:46:55,446 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:46:55,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:46:55,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:46:55,448 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:46:55,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:46:55,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:46:55,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:46:55,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:46:55,738 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:46:55,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix003.oepc.i [2024-06-14 11:46:56,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:46:57,135 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:46:57,135 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix003.oepc.i [2024-06-14 11:46:57,156 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b862ae6e7/5e2100fa14814481ae4b27298fc76567/FLAGe761f51d9 [2024-06-14 11:46:57,168 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b862ae6e7/5e2100fa14814481ae4b27298fc76567 [2024-06-14 11:46:57,170 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:46:57,171 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:46:57,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix003.oepc.yml/witness.yml [2024-06-14 11:46:57,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:46:57,366 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:46:57,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:46:57,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:46:57,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:46:57,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:46:57" (1/2) ... [2024-06-14 11:46:57,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea7b340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:46:57, skipping insertion in model container [2024-06-14 11:46:57,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:46:57" (1/2) ... [2024-06-14 11:46:57,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6bce31dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:46:57, skipping insertion in model container [2024-06-14 11:46:57,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:57" (2/2) ... [2024-06-14 11:46:57,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ea7b340 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:57, skipping insertion in model container [2024-06-14 11:46:57,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:57" (2/2) ... [2024-06-14 11:46:57,377 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:46:57,484 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:46:57,486 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:46:57,486 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:46:57,486 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:46:57,486 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:46:57,487 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-14 11:46:57,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:46:57,944 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:46:57,954 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:46:58,116 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:46:58,156 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:46:58,156 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58 WrapperNode [2024-06-14 11:46:58,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:46:58,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:46:58,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:46:58,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:46:58,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,223 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-14 11:46:58,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:46:58,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:46:58,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:46:58,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:46:58,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,262 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,289 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:46:58,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:46:58,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:46:58,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:46:58,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:46:58,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (1/1) ... [2024-06-14 11:46:58,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:46:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:46:58,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:46:58,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:46:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:46:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:46:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:46:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:46:58,405 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:46:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:46:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:46:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:46:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:46:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:46:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:46:58,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:46:58,409 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:46:58,579 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:46:58,581 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:46:58,949 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:46:58,949 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:46:59,146 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:46:59,146 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:46:59,147 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:46:59 BoogieIcfgContainer [2024-06-14 11:46:59,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:46:59,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:46:59,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:46:59,153 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:46:59,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:46:57" (1/4) ... [2024-06-14 11:46:59,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699b1120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:46:59, skipping insertion in model container [2024-06-14 11:46:59,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:57" (2/4) ... [2024-06-14 11:46:59,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699b1120 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:46:59, skipping insertion in model container [2024-06-14 11:46:59,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:58" (3/4) ... [2024-06-14 11:46:59,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699b1120 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:46:59, skipping insertion in model container [2024-06-14 11:46:59,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:46:59" (4/4) ... [2024-06-14 11:46:59,157 INFO L112 eAbstractionObserver]: Analyzing ICFG mix003.oepc.i [2024-06-14 11:46:59,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:46:59,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:46:59,173 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:46:59,223 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:46:59,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:46:59,374 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 11:46:59,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:46:59,376 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. [2024-06-14 11:46:59,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:46:59,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 11:46:59,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:46:59,399 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;@57405237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:46:59,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:46:59,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:46:59,411 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:46:59,411 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:46:59,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:59,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:46:59,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:59,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1094158895, now seen corresponding path program 1 times [2024-06-14 11:46:59,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536055311] [2024-06-14 11:46:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:00,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536055311] [2024-06-14 11:47:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536055311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:00,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:00,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:47:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100497705] [2024-06-14 11:47:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:47:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:47:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:47:01,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 11:47:01,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 11:47:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:01,446 INFO L124 PetriNetUnfolderBase]: 1116/1767 cut-off events. [2024-06-14 11:47:01,446 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 11:47:01,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1767 events. 1116/1767 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8825 event pairs, 765 based on Foata normal form. 1/1723 useless extension candidates. Maximal degree in co-relation 3505. Up to 1676 conditions per place. [2024-06-14 11:47:01,462 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 11:47:01,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-14 11:47:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:47:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:47:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-14 11:47:01,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-14 11:47:01,476 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-14 11:47:01,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-14 11:47:01,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:01,482 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 11:47:01,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 11:47:01,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 11:47:01,487 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 11:47:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:01,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:01,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:47:01,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:01,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 780326320, now seen corresponding path program 1 times [2024-06-14 11:47:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:01,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036452951] [2024-06-14 11:47:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036452951] [2024-06-14 11:47:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036452951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:02,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:02,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:47:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887539505] [2024-06-14 11:47:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:02,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:47:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:47:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:47:02,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 11:47:02,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:02,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:02,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 11:47:02,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:02,775 INFO L124 PetriNetUnfolderBase]: 1110/1774 cut-off events. [2024-06-14 11:47:02,776 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-06-14 11:47:02,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3997 conditions, 1774 events. 1110/1774 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8876 event pairs, 641 based on Foata normal form. 3/1768 useless extension candidates. Maximal degree in co-relation 3982. Up to 1652 conditions per place. [2024-06-14 11:47:02,788 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 11:47:02,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-14 11:47:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:47:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:47:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 11:47:02,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 11:47:02,792 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-14 11:47:02,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-14 11:47:02,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:47:02,796 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 11:47:02,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 11:47:02,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 11:47:02,797 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 11:47:02,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:02,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:02,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:02,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:47:02,801 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:02,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:02,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1725644401, now seen corresponding path program 1 times [2024-06-14 11:47:02,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:02,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155254902] [2024-06-14 11:47:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:02,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155254902] [2024-06-14 11:47:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155254902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:04,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:47:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120175737] [2024-06-14 11:47:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:47:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:47:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:47:04,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:47:04,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:04,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:04,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:47:04,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:04,995 INFO L124 PetriNetUnfolderBase]: 1345/2123 cut-off events. [2024-06-14 11:47:04,996 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2024-06-14 11:47:04,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5304 conditions, 2123 events. 1345/2123 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10686 event pairs, 592 based on Foata normal form. 3/2114 useless extension candidates. Maximal degree in co-relation 5287. Up to 1965 conditions per place. [2024-06-14 11:47:05,010 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-14 11:47:05,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 378 flow [2024-06-14 11:47:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:47:05,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2024-06-14 11:47:05,016 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:47:05,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 378 flow [2024-06-14 11:47:05,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:47:05,019 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-14 11:47:05,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 11:47:05,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 11:47:05,021 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-14 11:47:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:05,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:05,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:05,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:47:05,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:05,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1955367603, now seen corresponding path program 1 times [2024-06-14 11:47:05,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:05,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614695239] [2024-06-14 11:47:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:05,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614695239] [2024-06-14 11:47:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614695239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:06,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:06,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182275466] [2024-06-14 11:47:06,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:06,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:06,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:47:06,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:06,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:06,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:47:06,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:07,375 INFO L124 PetriNetUnfolderBase]: 1336/2104 cut-off events. [2024-06-14 11:47:07,376 INFO L125 PetriNetUnfolderBase]: For 2265/2265 co-relation queries the response was YES. [2024-06-14 11:47:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5875 conditions, 2104 events. 1336/2104 cut-off events. For 2265/2265 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10519 event pairs, 450 based on Foata normal form. 6/2096 useless extension candidates. Maximal degree in co-relation 5856. Up to 1920 conditions per place. [2024-06-14 11:47:07,392 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-14 11:47:07,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 438 flow [2024-06-14 11:47:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:47:07,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 11:47:07,394 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:47:07,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 438 flow [2024-06-14 11:47:07,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:07,398 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 219 flow [2024-06-14 11:47:07,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 11:47:07,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 11:47:07,399 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 219 flow [2024-06-14 11:47:07,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:07,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:07,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:07,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:47:07,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:07,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1646147003, now seen corresponding path program 1 times [2024-06-14 11:47:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815368269] [2024-06-14 11:47:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:08,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815368269] [2024-06-14 11:47:08,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815368269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:47:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57141501] [2024-06-14 11:47:08,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:08,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:47:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:47:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:47:08,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:08,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:08,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:08,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:08,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:08,798 INFO L124 PetriNetUnfolderBase]: 1627/2519 cut-off events. [2024-06-14 11:47:08,798 INFO L125 PetriNetUnfolderBase]: For 3937/3937 co-relation queries the response was YES. [2024-06-14 11:47:08,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 2519 events. 1627/2519 cut-off events. For 3937/3937 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12328 event pairs, 689 based on Foata normal form. 2/2519 useless extension candidates. Maximal degree in co-relation 7408. Up to 2407 conditions per place. [2024-06-14 11:47:08,813 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 11:47:08,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 375 flow [2024-06-14 11:47:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:47:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:47:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-14 11:47:08,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-14 11:47:08,814 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 219 flow. Second operand 5 states and 97 transitions. [2024-06-14 11:47:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 375 flow [2024-06-14 11:47:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 336 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:08,819 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-14 11:47:08,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-14 11:47:08,820 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 11:47:08,820 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-14 11:47:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:08,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:08,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:08,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:47:08,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:08,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -518880449, now seen corresponding path program 1 times [2024-06-14 11:47:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:08,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375644072] [2024-06-14 11:47:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:09,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:09,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375644072] [2024-06-14 11:47:09,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375644072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:09,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:09,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:09,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699907833] [2024-06-14 11:47:09,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:09,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:09,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:09,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:09,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:09,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:10,413 INFO L124 PetriNetUnfolderBase]: 1617/2514 cut-off events. [2024-06-14 11:47:10,414 INFO L125 PetriNetUnfolderBase]: For 5575/5575 co-relation queries the response was YES. [2024-06-14 11:47:10,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7872 conditions, 2514 events. 1617/2514 cut-off events. For 5575/5575 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12388 event pairs, 653 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 7850. Up to 2375 conditions per place. [2024-06-14 11:47:10,431 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-14 11:47:10,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 414 flow [2024-06-14 11:47:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 11:47:10,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 11:47:10,433 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 115 transitions. [2024-06-14 11:47:10,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 414 flow [2024-06-14 11:47:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 392 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:10,439 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-14 11:47:10,440 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 11:47:10,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 11:47:10,442 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-14 11:47:10,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:10,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:47:10,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:10,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1088854480, now seen corresponding path program 1 times [2024-06-14 11:47:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:10,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672819755] [2024-06-14 11:47:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:11,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:11,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672819755] [2024-06-14 11:47:11,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672819755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:11,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:11,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155667190] [2024-06-14 11:47:11,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:11,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:11,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:11,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:12,033 INFO L124 PetriNetUnfolderBase]: 1628/2560 cut-off events. [2024-06-14 11:47:12,034 INFO L125 PetriNetUnfolderBase]: For 7208/7214 co-relation queries the response was YES. [2024-06-14 11:47:12,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 2560 events. 1628/2560 cut-off events. For 7208/7214 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12726 event pairs, 654 based on Foata normal form. 6/2563 useless extension candidates. Maximal degree in co-relation 8510. Up to 2374 conditions per place. [2024-06-14 11:47:12,058 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-14 11:47:12,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 526 flow [2024-06-14 11:47:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 11:47:12,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 11:47:12,061 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 121 transitions. [2024-06-14 11:47:12,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 526 flow [2024-06-14 11:47:12,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 494 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:12,066 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-14 11:47:12,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-14 11:47:12,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 11:47:12,067 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-14 11:47:12,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:12,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:12,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:12,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:47:12,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:12,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:12,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1410055090, now seen corresponding path program 2 times [2024-06-14 11:47:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:12,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736329868] [2024-06-14 11:47:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:13,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:13,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736329868] [2024-06-14 11:47:13,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736329868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:13,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:13,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:13,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107331347] [2024-06-14 11:47:13,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:13,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:13,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:13,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:13,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:13,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:13,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:13,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:13,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:13,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:13,644 INFO L124 PetriNetUnfolderBase]: 1623/2552 cut-off events. [2024-06-14 11:47:13,644 INFO L125 PetriNetUnfolderBase]: For 9223/9223 co-relation queries the response was YES. [2024-06-14 11:47:13,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 2552 events. 1623/2552 cut-off events. For 9223/9223 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12710 event pairs, 650 based on Foata normal form. 2/2552 useless extension candidates. Maximal degree in co-relation 9011. Up to 2393 conditions per place. [2024-06-14 11:47:13,659 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-14 11:47:13,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 74 transitions, 494 flow [2024-06-14 11:47:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 11:47:13,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:47:13,661 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 6 states and 114 transitions. [2024-06-14 11:47:13,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 74 transitions, 494 flow [2024-06-14 11:47:13,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 456 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 11:47:13,669 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 310 flow [2024-06-14 11:47:13,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-14 11:47:13,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-14 11:47:13,672 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 310 flow [2024-06-14 11:47:13,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:13,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:13,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:13,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:47:13,673 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:13,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash -605368604, now seen corresponding path program 1 times [2024-06-14 11:47:13,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:13,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777732207] [2024-06-14 11:47:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:14,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:14,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777732207] [2024-06-14 11:47:14,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777732207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:14,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:14,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:14,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353094194] [2024-06-14 11:47:14,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:14,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:14,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:14,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:14,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:14,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:14,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:14,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:15,546 INFO L124 PetriNetUnfolderBase]: 1634/2567 cut-off events. [2024-06-14 11:47:15,546 INFO L125 PetriNetUnfolderBase]: For 10726/10726 co-relation queries the response was YES. [2024-06-14 11:47:15,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9227 conditions, 2567 events. 1634/2567 cut-off events. For 10726/10726 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12736 event pairs, 632 based on Foata normal form. 2/2567 useless extension candidates. Maximal degree in co-relation 9201. Up to 2388 conditions per place. [2024-06-14 11:47:15,560 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-14 11:47:15,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 564 flow [2024-06-14 11:47:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:47:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-14 11:47:15,562 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 310 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:47:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 564 flow [2024-06-14 11:47:15,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 530 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:15,571 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-14 11:47:15,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 11:47:15,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 11:47:15,572 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-14 11:47:15,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:15,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:15,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:15,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:47:15,573 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -434546018, now seen corresponding path program 1 times [2024-06-14 11:47:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806515744] [2024-06-14 11:47:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:16,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:16,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806515744] [2024-06-14 11:47:16,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806515744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:16,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478657466] [2024-06-14 11:47:16,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:16,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:16,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:16,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:16,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:16,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:16,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:16,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:16,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:17,177 INFO L124 PetriNetUnfolderBase]: 1672/2620 cut-off events. [2024-06-14 11:47:17,177 INFO L125 PetriNetUnfolderBase]: For 13675/13681 co-relation queries the response was YES. [2024-06-14 11:47:17,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9997 conditions, 2620 events. 1672/2620 cut-off events. For 13675/13681 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12962 event pairs, 591 based on Foata normal form. 5/2621 useless extension candidates. Maximal degree in co-relation 9971. Up to 2384 conditions per place. [2024-06-14 11:47:17,195 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 69 selfloop transitions, 23 changer transitions 0/97 dead transitions. [2024-06-14 11:47:17,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 690 flow [2024-06-14 11:47:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 11:47:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-14 11:47:17,221 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 142 transitions. [2024-06-14 11:47:17,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 690 flow [2024-06-14 11:47:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 646 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:17,231 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 436 flow [2024-06-14 11:47:17,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-14 11:47:17,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-14 11:47:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 436 flow [2024-06-14 11:47:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:17,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:17,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:17,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:47:17,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:17,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash -605248634, now seen corresponding path program 2 times [2024-06-14 11:47:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:17,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746542795] [2024-06-14 11:47:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:18,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746542795] [2024-06-14 11:47:18,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746542795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:18,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:18,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:18,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138850302] [2024-06-14 11:47:18,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:18,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:18,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:18,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:18,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:18,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:18,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:18,803 INFO L124 PetriNetUnfolderBase]: 1683/2637 cut-off events. [2024-06-14 11:47:18,803 INFO L125 PetriNetUnfolderBase]: For 16775/16778 co-relation queries the response was YES. [2024-06-14 11:47:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10835 conditions, 2637 events. 1683/2637 cut-off events. For 16775/16778 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13039 event pairs, 602 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 10807. Up to 2412 conditions per place. [2024-06-14 11:47:18,818 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 70 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-14 11:47:18,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 796 flow [2024-06-14 11:47:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:47:18,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:47:18,820 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 436 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:47:18,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 796 flow [2024-06-14 11:47:18,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 770 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 11:47:18,832 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 544 flow [2024-06-14 11:47:18,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-14 11:47:18,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-14 11:47:18,833 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 544 flow [2024-06-14 11:47:18,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:18,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:18,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:18,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:47:18,834 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)] === [2024-06-14 11:47:18,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 762273020, now seen corresponding path program 2 times [2024-06-14 11:47:18,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:18,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123767354] [2024-06-14 11:47:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:18,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:19,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123767354] [2024-06-14 11:47:19,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123767354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639569374] [2024-06-14 11:47:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:19,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:19,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:19,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:19,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:20,509 INFO L124 PetriNetUnfolderBase]: 1705/2673 cut-off events. [2024-06-14 11:47:20,510 INFO L125 PetriNetUnfolderBase]: For 20676/20676 co-relation queries the response was YES. [2024-06-14 11:47:20,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11580 conditions, 2673 events. 1705/2673 cut-off events. For 20676/20676 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13206 event pairs, 598 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 11549. Up to 2494 conditions per place. [2024-06-14 11:47:20,526 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 81 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-14 11:47:20,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 818 flow [2024-06-14 11:47:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:47:20,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 11:47:20,528 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 544 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:47:20,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 818 flow [2024-06-14 11:47:20,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 774 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:20,544 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 574 flow [2024-06-14 11:47:20,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=574, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-14 11:47:20,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 11:47:20,545 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 574 flow [2024-06-14 11:47:20,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:20,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:20,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:47:20,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:20,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -428116928, now seen corresponding path program 3 times [2024-06-14 11:47:20,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:20,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715664307] [2024-06-14 11:47:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:21,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715664307] [2024-06-14 11:47:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715664307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:21,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478319868] [2024-06-14 11:47:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 574 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:21,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:21,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:22,145 INFO L124 PetriNetUnfolderBase]: 1695/2659 cut-off events. [2024-06-14 11:47:22,145 INFO L125 PetriNetUnfolderBase]: For 23061/23061 co-relation queries the response was YES. [2024-06-14 11:47:22,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11751 conditions, 2659 events. 1695/2659 cut-off events. For 23061/23061 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13141 event pairs, 596 based on Foata normal form. 4/2661 useless extension candidates. Maximal degree in co-relation 11718. Up to 2453 conditions per place. [2024-06-14 11:47:22,161 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-06-14 11:47:22,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 822 flow [2024-06-14 11:47:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 11:47:22,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 11:47:22,163 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 574 flow. Second operand 7 states and 135 transitions. [2024-06-14 11:47:22,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 822 flow [2024-06-14 11:47:22,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 760 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:22,183 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 558 flow [2024-06-14 11:47:22,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-14 11:47:22,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 11:47:22,184 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 558 flow [2024-06-14 11:47:22,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:22,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:22,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:22,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:47:22,185 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:22,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1779156582, now seen corresponding path program 3 times [2024-06-14 11:47:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:22,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641266444] [2024-06-14 11:47:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:23,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:23,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:23,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641266444] [2024-06-14 11:47:23,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641266444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:23,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:23,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266570264] [2024-06-14 11:47:23,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:23,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 558 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:23,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:23,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:23,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:23,840 INFO L124 PetriNetUnfolderBase]: 1690/2652 cut-off events. [2024-06-14 11:47:23,841 INFO L125 PetriNetUnfolderBase]: For 25196/25196 co-relation queries the response was YES. [2024-06-14 11:47:23,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11896 conditions, 2652 events. 1690/2652 cut-off events. For 25196/25196 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13114 event pairs, 596 based on Foata normal form. 2/2652 useless extension candidates. Maximal degree in co-relation 11863. Up to 2482 conditions per place. [2024-06-14 11:47:23,858 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-14 11:47:23,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 794 flow [2024-06-14 11:47:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:47:23,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 11:47:23,859 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 558 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:47:23,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 794 flow [2024-06-14 11:47:23,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 716 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:23,884 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 516 flow [2024-06-14 11:47:23,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-14 11:47:23,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 11:47:23,884 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 516 flow [2024-06-14 11:47:23,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:23,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:23,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:47:23,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -957401917, now seen corresponding path program 1 times [2024-06-14 11:47:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063028298] [2024-06-14 11:47:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:24,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:24,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063028298] [2024-06-14 11:47:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063028298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:24,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:47:24,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487276164] [2024-06-14 11:47:24,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:24,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:47:24,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:47:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:47:24,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:24,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 516 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:24,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:24,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:24,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:25,256 INFO L124 PetriNetUnfolderBase]: 2009/3104 cut-off events. [2024-06-14 11:47:25,256 INFO L125 PetriNetUnfolderBase]: For 35735/35735 co-relation queries the response was YES. [2024-06-14 11:47:25,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14115 conditions, 3104 events. 2009/3104 cut-off events. For 35735/35735 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15259 event pairs, 833 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 14081. Up to 2949 conditions per place. [2024-06-14 11:47:25,274 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 66 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-14 11:47:25,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 704 flow [2024-06-14 11:47:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:47:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:47:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 11:47:25,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 11:47:25,276 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 516 flow. Second operand 5 states and 93 transitions. [2024-06-14 11:47:25,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 704 flow [2024-06-14 11:47:25,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 658 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:25,297 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 518 flow [2024-06-14 11:47:25,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-14 11:47:25,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 11:47:25,298 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 518 flow [2024-06-14 11:47:25,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:25,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:25,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:47:25,299 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:25,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1586646865, now seen corresponding path program 1 times [2024-06-14 11:47:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439132938] [2024-06-14 11:47:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:25,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:26,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:26,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439132938] [2024-06-14 11:47:26,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439132938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:26,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:26,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742891414] [2024-06-14 11:47:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:26,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:26,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:26,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:26,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:26,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:26,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:27,398 INFO L124 PetriNetUnfolderBase]: 1803/2789 cut-off events. [2024-06-14 11:47:27,399 INFO L125 PetriNetUnfolderBase]: For 36017/36017 co-relation queries the response was YES. [2024-06-14 11:47:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13600 conditions, 2789 events. 1803/2789 cut-off events. For 36017/36017 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13810 event pairs, 615 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 13565. Up to 2560 conditions per place. [2024-06-14 11:47:27,412 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-14 11:47:27,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 986 flow [2024-06-14 11:47:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 11:47:27,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 11:47:27,414 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 518 flow. Second operand 9 states and 177 transitions. [2024-06-14 11:47:27,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 986 flow [2024-06-14 11:47:27,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 960 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:27,434 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 624 flow [2024-06-14 11:47:27,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=624, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-14 11:47:27,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 11:47:27,435 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 624 flow [2024-06-14 11:47:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:27,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:27,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:27,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:47:27,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:27,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1686014759, now seen corresponding path program 2 times [2024-06-14 11:47:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:27,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114476665] [2024-06-14 11:47:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:27,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114476665] [2024-06-14 11:47:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114476665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:28,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:28,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377498511] [2024-06-14 11:47:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:29,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:29,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 624 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:29,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:29,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:29,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:29,666 INFO L124 PetriNetUnfolderBase]: 1798/2782 cut-off events. [2024-06-14 11:47:29,666 INFO L125 PetriNetUnfolderBase]: For 40931/40931 co-relation queries the response was YES. [2024-06-14 11:47:29,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14190 conditions, 2782 events. 1798/2782 cut-off events. For 40931/40931 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13747 event pairs, 615 based on Foata normal form. 2/2782 useless extension candidates. Maximal degree in co-relation 14154. Up to 2579 conditions per place. [2024-06-14 11:47:29,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-14 11:47:29,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 922 flow [2024-06-14 11:47:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:47:29,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 11:47:29,683 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 624 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:47:29,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 922 flow [2024-06-14 11:47:29,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 118 transitions, 848 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:29,702 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 592 flow [2024-06-14 11:47:29,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=592, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-06-14 11:47:29,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 11:47:29,703 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 592 flow [2024-06-14 11:47:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:29,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:29,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:47:29,704 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)] === [2024-06-14 11:47:29,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1686014604, now seen corresponding path program 1 times [2024-06-14 11:47:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103349888] [2024-06-14 11:47:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:30,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:30,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103349888] [2024-06-14 11:47:30,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103349888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:30,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:30,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900961886] [2024-06-14 11:47:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:30,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:30,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:30,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 592 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:30,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:30,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:30,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:31,483 INFO L124 PetriNetUnfolderBase]: 1822/2810 cut-off events. [2024-06-14 11:47:31,483 INFO L125 PetriNetUnfolderBase]: For 46007/46007 co-relation queries the response was YES. [2024-06-14 11:47:31,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14585 conditions, 2810 events. 1822/2810 cut-off events. For 46007/46007 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13861 event pairs, 609 based on Foata normal form. 4/2809 useless extension candidates. Maximal degree in co-relation 14547. Up to 2604 conditions per place. [2024-06-14 11:47:31,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 99 selfloop transitions, 17 changer transitions 0/122 dead transitions. [2024-06-14 11:47:31,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 122 transitions, 940 flow [2024-06-14 11:47:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:47:31,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:47:31,499 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 592 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:47:31,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 122 transitions, 940 flow [2024-06-14 11:47:31,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 898 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:31,516 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 636 flow [2024-06-14 11:47:31,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-06-14 11:47:31,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-14 11:47:31,517 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 636 flow [2024-06-14 11:47:31,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:31,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:31,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:31,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:47:31,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:31,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:31,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1682289954, now seen corresponding path program 2 times [2024-06-14 11:47:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:31,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319080647] [2024-06-14 11:47:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:31,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:32,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319080647] [2024-06-14 11:47:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319080647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:32,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727128333] [2024-06-14 11:47:32,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:32,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:32,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 636 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:32,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:32,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:32,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:33,151 INFO L124 PetriNetUnfolderBase]: 1897/2923 cut-off events. [2024-06-14 11:47:33,151 INFO L125 PetriNetUnfolderBase]: For 53043/53046 co-relation queries the response was YES. [2024-06-14 11:47:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15880 conditions, 2923 events. 1897/2923 cut-off events. For 53043/53046 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14516 event pairs, 593 based on Foata normal form. 4/2921 useless extension candidates. Maximal degree in co-relation 15841. Up to 2511 conditions per place. [2024-06-14 11:47:33,168 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 84 selfloop transitions, 44 changer transitions 0/134 dead transitions. [2024-06-14 11:47:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 134 transitions, 1250 flow [2024-06-14 11:47:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:47:33,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 11:47:33,170 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 636 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:47:33,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 134 transitions, 1250 flow [2024-06-14 11:47:33,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1188 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:33,200 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 808 flow [2024-06-14 11:47:33,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=808, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-14 11:47:33,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 11:47:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 808 flow [2024-06-14 11:47:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:33,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:33,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:33,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:47:33,202 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:33,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1682295689, now seen corresponding path program 3 times [2024-06-14 11:47:33,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:33,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485823152] [2024-06-14 11:47:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:33,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:34,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485823152] [2024-06-14 11:47:34,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485823152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:34,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:34,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797219580] [2024-06-14 11:47:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:34,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:34,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 808 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:34,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:34,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:34,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:35,151 INFO L124 PetriNetUnfolderBase]: 1908/2940 cut-off events. [2024-06-14 11:47:35,151 INFO L125 PetriNetUnfolderBase]: For 59547/59550 co-relation queries the response was YES. [2024-06-14 11:47:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16644 conditions, 2940 events. 1908/2940 cut-off events. For 59547/59550 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14645 event pairs, 626 based on Foata normal form. 4/2939 useless extension candidates. Maximal degree in co-relation 16604. Up to 2690 conditions per place. [2024-06-14 11:47:35,168 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-14 11:47:35,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1168 flow [2024-06-14 11:47:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:47:35,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:47:35,171 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 808 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:47:35,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1168 flow [2024-06-14 11:47:35,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1102 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:35,195 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 860 flow [2024-06-14 11:47:35,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-14 11:47:35,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 11:47:35,196 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 860 flow [2024-06-14 11:47:35,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:35,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:35,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:35,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:47:35,197 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:35,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1682295534, now seen corresponding path program 3 times [2024-06-14 11:47:35,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:35,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313556812] [2024-06-14 11:47:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:35,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313556812] [2024-06-14 11:47:36,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313556812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:36,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:36,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043027717] [2024-06-14 11:47:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:36,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:36,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:36,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:36,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:36,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:36,943 INFO L124 PetriNetUnfolderBase]: 1898/2930 cut-off events. [2024-06-14 11:47:36,943 INFO L125 PetriNetUnfolderBase]: For 65004/65007 co-relation queries the response was YES. [2024-06-14 11:47:36,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17056 conditions, 2930 events. 1898/2930 cut-off events. For 65004/65007 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14558 event pairs, 586 based on Foata normal form. 4/2928 useless extension candidates. Maximal degree in co-relation 17014. Up to 2519 conditions per place. [2024-06-14 11:47:36,962 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 87 selfloop transitions, 43 changer transitions 0/136 dead transitions. [2024-06-14 11:47:36,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 136 transitions, 1284 flow [2024-06-14 11:47:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:47:36,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 11:47:36,964 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 860 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:47:36,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 136 transitions, 1284 flow [2024-06-14 11:47:36,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1170 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:36,994 INFO L231 Difference]: Finished difference. Result has 98 places, 104 transitions, 840 flow [2024-06-14 11:47:36,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=840, PETRI_PLACES=98, PETRI_TRANSITIONS=104} [2024-06-14 11:47:36,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 11:47:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 104 transitions, 840 flow [2024-06-14 11:47:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:36,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:36,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:47:36,996 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:36,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2146696687, now seen corresponding path program 4 times [2024-06-14 11:47:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:36,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415028291] [2024-06-14 11:47:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:38,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:38,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415028291] [2024-06-14 11:47:38,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415028291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:38,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:38,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:38,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573319028] [2024-06-14 11:47:38,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:38,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:38,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 104 transitions, 840 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:38,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:38,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:38,883 INFO L124 PetriNetUnfolderBase]: 1893/2918 cut-off events. [2024-06-14 11:47:38,883 INFO L125 PetriNetUnfolderBase]: For 69275/69275 co-relation queries the response was YES. [2024-06-14 11:47:38,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17236 conditions, 2918 events. 1893/2918 cut-off events. For 69275/69275 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14480 event pairs, 620 based on Foata normal form. 2/2916 useless extension candidates. Maximal degree in co-relation 17193. Up to 2726 conditions per place. [2024-06-14 11:47:38,900 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-14 11:47:38,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 130 transitions, 1198 flow [2024-06-14 11:47:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:47:38,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:47:38,901 INFO L175 Difference]: Start difference. First operand has 98 places, 104 transitions, 840 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:47:38,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 130 transitions, 1198 flow [2024-06-14 11:47:38,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1094 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:38,929 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 836 flow [2024-06-14 11:47:38,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-14 11:47:38,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 11:47:38,929 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 836 flow [2024-06-14 11:47:38,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:38,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:38,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:47:38,930 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:38,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash -379370376, now seen corresponding path program 4 times [2024-06-14 11:47:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:38,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125321773] [2024-06-14 11:47:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125321773] [2024-06-14 11:47:39,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125321773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:39,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:39,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:39,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570121524] [2024-06-14 11:47:39,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:39,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:39,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:39,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:40,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:40,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:40,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:40,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:40,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:40,644 INFO L124 PetriNetUnfolderBase]: 1915/2950 cut-off events. [2024-06-14 11:47:40,644 INFO L125 PetriNetUnfolderBase]: For 76475/76475 co-relation queries the response was YES. [2024-06-14 11:47:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17819 conditions, 2950 events. 1915/2950 cut-off events. For 76475/76475 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14711 event pairs, 620 based on Foata normal form. 4/2950 useless extension candidates. Maximal degree in co-relation 17775. Up to 2735 conditions per place. [2024-06-14 11:47:40,662 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 112 selfloop transitions, 17 changer transitions 0/135 dead transitions. [2024-06-14 11:47:40,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 135 transitions, 1210 flow [2024-06-14 11:47:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:47:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 11:47:40,664 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 836 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:47:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 135 transitions, 1210 flow [2024-06-14 11:47:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 135 transitions, 1134 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:40,708 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 858 flow [2024-06-14 11:47:40,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-14 11:47:40,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 11:47:40,709 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 858 flow [2024-06-14 11:47:40,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:40,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:40,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:47:40,710 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -386722026, now seen corresponding path program 5 times [2024-06-14 11:47:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069220104] [2024-06-14 11:47:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069220104] [2024-06-14 11:47:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069220104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:41,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:41,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657593973] [2024-06-14 11:47:41,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:41,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:41,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 858 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:41,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:41,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:41,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:42,421 INFO L124 PetriNetUnfolderBase]: 1937/2987 cut-off events. [2024-06-14 11:47:42,421 INFO L125 PetriNetUnfolderBase]: For 82920/82920 co-relation queries the response was YES. [2024-06-14 11:47:42,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18294 conditions, 2987 events. 1937/2987 cut-off events. For 82920/82920 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14914 event pairs, 620 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 18249. Up to 2684 conditions per place. [2024-06-14 11:47:42,442 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 106 selfloop transitions, 29 changer transitions 0/141 dead transitions. [2024-06-14 11:47:42,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1348 flow [2024-06-14 11:47:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:47:42,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 11:47:42,444 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 858 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:47:42,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1348 flow [2024-06-14 11:47:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1280 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:42,497 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 912 flow [2024-06-14 11:47:42,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=912, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 11:47:42,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 11:47:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 912 flow [2024-06-14 11:47:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:42,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:42,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:47:42,498 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:42,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash -386727606, now seen corresponding path program 6 times [2024-06-14 11:47:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:42,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369582614] [2024-06-14 11:47:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:43,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:43,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369582614] [2024-06-14 11:47:43,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369582614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:43,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:43,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:43,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681470] [2024-06-14 11:47:43,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:43,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:43,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:43,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:43,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:43,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 912 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:43,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:43,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:43,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:44,063 INFO L124 PetriNetUnfolderBase]: 1927/2973 cut-off events. [2024-06-14 11:47:44,063 INFO L125 PetriNetUnfolderBase]: For 87543/87543 co-relation queries the response was YES. [2024-06-14 11:47:44,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18359 conditions, 2973 events. 1927/2973 cut-off events. For 87543/87543 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14805 event pairs, 613 based on Foata normal form. 4/2973 useless extension candidates. Maximal degree in co-relation 18313. Up to 2676 conditions per place. [2024-06-14 11:47:44,082 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 30 changer transitions 0/139 dead transitions. [2024-06-14 11:47:44,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 1248 flow [2024-06-14 11:47:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:47:44,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 11:47:44,083 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 912 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:47:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 1248 flow [2024-06-14 11:47:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 139 transitions, 1094 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:44,126 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 826 flow [2024-06-14 11:47:44,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-14 11:47:44,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 11:47:44,127 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 826 flow [2024-06-14 11:47:44,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:44,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:44,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:47:44,127 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:44,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash -379093329, now seen corresponding path program 1 times [2024-06-14 11:47:44,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:44,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318027984] [2024-06-14 11:47:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:44,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:45,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:45,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318027984] [2024-06-14 11:47:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318027984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:45,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324846363] [2024-06-14 11:47:45,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:45,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:45,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:47:45,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 826 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:45,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:45,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:47:45,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:46,421 INFO L124 PetriNetUnfolderBase]: 2291/3467 cut-off events. [2024-06-14 11:47:46,422 INFO L125 PetriNetUnfolderBase]: For 106278/106278 co-relation queries the response was YES. [2024-06-14 11:47:46,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20998 conditions, 3467 events. 2291/3467 cut-off events. For 106278/106278 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16686 event pairs, 756 based on Foata normal form. 4/3467 useless extension candidates. Maximal degree in co-relation 20951. Up to 3280 conditions per place. [2024-06-14 11:47:46,442 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 18 changer transitions 0/142 dead transitions. [2024-06-14 11:47:46,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 1224 flow [2024-06-14 11:47:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:47:46,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 11:47:46,444 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 826 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:47:46,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 1224 flow [2024-06-14 11:47:46,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 142 transitions, 1152 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:46,482 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 871 flow [2024-06-14 11:47:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2024-06-14 11:47:46,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 11:47:46,483 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 871 flow [2024-06-14 11:47:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:46,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:46,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:46,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:47:46,483 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:46,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash 385313202, now seen corresponding path program 1 times [2024-06-14 11:47:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418054325] [2024-06-14 11:47:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:46,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:47,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418054325] [2024-06-14 11:47:47,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418054325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:47,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:47,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:47,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458670963] [2024-06-14 11:47:47,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:47,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:47,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:47,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 871 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:47,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:47,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:47,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:47,952 INFO L124 PetriNetUnfolderBase]: 2136/3286 cut-off events. [2024-06-14 11:47:47,952 INFO L125 PetriNetUnfolderBase]: For 111521/111531 co-relation queries the response was YES. [2024-06-14 11:47:47,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20365 conditions, 3286 events. 2136/3286 cut-off events. For 111521/111531 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16092 event pairs, 782 based on Foata normal form. 11/3285 useless extension candidates. Maximal degree in co-relation 20316. Up to 3111 conditions per place. [2024-06-14 11:47:47,972 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 100 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-06-14 11:47:47,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 132 transitions, 1145 flow [2024-06-14 11:47:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 11:47:47,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 11:47:47,973 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 871 flow. Second operand 6 states and 109 transitions. [2024-06-14 11:47:47,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 132 transitions, 1145 flow [2024-06-14 11:47:48,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 132 transitions, 1076 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:48,022 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 862 flow [2024-06-14 11:47:48,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=862, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2024-06-14 11:47:48,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 11:47:48,023 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 862 flow [2024-06-14 11:47:48,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:48,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:48,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:48,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:47:48,024 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:48,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1941472093, now seen corresponding path program 1 times [2024-06-14 11:47:48,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:48,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981276064] [2024-06-14 11:47:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:48,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981276064] [2024-06-14 11:47:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981276064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:49,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594130335] [2024-06-14 11:47:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:49,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:49,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:49,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:49,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:49,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:50,278 INFO L124 PetriNetUnfolderBase]: 2192/3367 cut-off events. [2024-06-14 11:47:50,278 INFO L125 PetriNetUnfolderBase]: For 118558/118558 co-relation queries the response was YES. [2024-06-14 11:47:50,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21636 conditions, 3367 events. 2192/3367 cut-off events. For 118558/118558 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16851 event pairs, 531 based on Foata normal form. 4/3359 useless extension candidates. Maximal degree in co-relation 21586. Up to 3033 conditions per place. [2024-06-14 11:47:50,300 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 28 changer transitions 0/169 dead transitions. [2024-06-14 11:47:50,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 169 transitions, 1500 flow [2024-06-14 11:47:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:47:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:47:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 11:47:50,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 11:47:50,302 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 862 flow. Second operand 10 states and 195 transitions. [2024-06-14 11:47:50,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 169 transitions, 1500 flow [2024-06-14 11:47:50,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 1462 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:50,403 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 991 flow [2024-06-14 11:47:50,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=991, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-06-14 11:47:50,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 11:47:50,404 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 991 flow [2024-06-14 11:47:50,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:50,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:50,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:47:50,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:50,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash -729645447, now seen corresponding path program 1 times [2024-06-14 11:47:50,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:50,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114163354] [2024-06-14 11:47:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:51,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114163354] [2024-06-14 11:47:51,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114163354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:51,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:51,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522169616] [2024-06-14 11:47:51,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:51,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:51,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:51,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 991 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:51,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:51,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:52,540 INFO L124 PetriNetUnfolderBase]: 2258/3467 cut-off events. [2024-06-14 11:47:52,540 INFO L125 PetriNetUnfolderBase]: For 132296/132296 co-relation queries the response was YES. [2024-06-14 11:47:52,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22960 conditions, 3467 events. 2258/3467 cut-off events. For 132296/132296 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17458 event pairs, 635 based on Foata normal form. 4/3456 useless extension candidates. Maximal degree in co-relation 22909. Up to 3146 conditions per place. [2024-06-14 11:47:52,564 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 139 selfloop transitions, 30 changer transitions 0/176 dead transitions. [2024-06-14 11:47:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 176 transitions, 1667 flow [2024-06-14 11:47:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:47:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:47:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:47:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-14 11:47:52,565 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 991 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:47:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 176 transitions, 1667 flow [2024-06-14 11:47:52,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 176 transitions, 1577 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:52,627 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1087 flow [2024-06-14 11:47:52,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1087, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-14 11:47:52,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-14 11:47:52,628 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1087 flow [2024-06-14 11:47:52,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:52,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:52,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:52,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:47:52,629 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:52,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -729645571, now seen corresponding path program 2 times [2024-06-14 11:47:52,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:52,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056966129] [2024-06-14 11:47:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:52,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:53,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:53,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056966129] [2024-06-14 11:47:53,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056966129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:53,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:53,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:53,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637900651] [2024-06-14 11:47:53,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:53,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:53,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:53,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:54,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:54,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:54,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:54,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:54,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:54,902 INFO L124 PetriNetUnfolderBase]: 2260/3464 cut-off events. [2024-06-14 11:47:54,902 INFO L125 PetriNetUnfolderBase]: For 140716/140716 co-relation queries the response was YES. [2024-06-14 11:47:54,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23403 conditions, 3464 events. 2260/3464 cut-off events. For 140716/140716 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17421 event pairs, 646 based on Foata normal form. 4/3455 useless extension candidates. Maximal degree in co-relation 23350. Up to 3191 conditions per place. [2024-06-14 11:47:54,927 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 140 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-06-14 11:47:54,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 172 transitions, 1521 flow [2024-06-14 11:47:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:47:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:47:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 11:47:54,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-14 11:47:54,928 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1087 flow. Second operand 10 states and 191 transitions. [2024-06-14 11:47:54,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 172 transitions, 1521 flow [2024-06-14 11:47:54,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 1407 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:54,997 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1031 flow [2024-06-14 11:47:54,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1031, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-06-14 11:47:54,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 11:47:54,998 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1031 flow [2024-06-14 11:47:54,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:54,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:54,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:47:54,999 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:54,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash -726844287, now seen corresponding path program 2 times [2024-06-14 11:47:54,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:54,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220660251] [2024-06-14 11:47:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:56,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220660251] [2024-06-14 11:47:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220660251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:56,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:56,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580324466] [2024-06-14 11:47:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:56,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:56,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1031 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:56,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:56,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:56,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:57,234 INFO L124 PetriNetUnfolderBase]: 2277/3494 cut-off events. [2024-06-14 11:47:57,234 INFO L125 PetriNetUnfolderBase]: For 149165/149165 co-relation queries the response was YES. [2024-06-14 11:47:57,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 3494 events. 2277/3494 cut-off events. For 149165/149165 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17610 event pairs, 637 based on Foata normal form. 4/3484 useless extension candidates. Maximal degree in co-relation 23666. Up to 3233 conditions per place. [2024-06-14 11:47:57,260 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 142 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-06-14 11:47:57,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 169 transitions, 1497 flow [2024-06-14 11:47:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:47:57,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 11:47:57,261 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1031 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:47:57,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 169 transitions, 1497 flow [2024-06-14 11:47:57,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 169 transitions, 1442 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 11:47:57,307 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1080 flow [2024-06-14 11:47:57,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1080, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-14 11:47:57,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 11:47:57,308 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1080 flow [2024-06-14 11:47:57,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:57,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:57,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:57,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:47:57,309 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1408155647, now seen corresponding path program 3 times [2024-06-14 11:47:57,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:57,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048378284] [2024-06-14 11:47:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048378284] [2024-06-14 11:47:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048378284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335576423] [2024-06-14 11:47:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:58,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:47:58,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1080 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:58,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:58,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:47:58,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:59,452 INFO L124 PetriNetUnfolderBase]: 2267/3480 cut-off events. [2024-06-14 11:47:59,452 INFO L125 PetriNetUnfolderBase]: For 156344/156344 co-relation queries the response was YES. [2024-06-14 11:47:59,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23823 conditions, 3480 events. 2267/3480 cut-off events. For 156344/156344 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17533 event pairs, 635 based on Foata normal form. 4/3470 useless extension candidates. Maximal degree in co-relation 23767. Up to 3192 conditions per place. [2024-06-14 11:47:59,476 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 138 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 11:47:59,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 1502 flow [2024-06-14 11:47:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:47:59,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 11:47:59,478 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1080 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:47:59,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 1502 flow [2024-06-14 11:47:59,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 170 transitions, 1400 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:59,540 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 1036 flow [2024-06-14 11:47:59,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1036, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2024-06-14 11:47:59,540 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 11:47:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 1036 flow [2024-06-14 11:47:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:59,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:59,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:47:59,541 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)] === [2024-06-14 11:47:59,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -611380137, now seen corresponding path program 4 times [2024-06-14 11:47:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488846378] [2024-06-14 11:47:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488846378] [2024-06-14 11:48:00,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488846378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:00,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:00,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615532257] [2024-06-14 11:48:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:00,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:00,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 1036 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:00,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:00,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:01,477 INFO L124 PetriNetUnfolderBase]: 2288/3521 cut-off events. [2024-06-14 11:48:01,477 INFO L125 PetriNetUnfolderBase]: For 165684/165687 co-relation queries the response was YES. [2024-06-14 11:48:01,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24233 conditions, 3521 events. 2288/3521 cut-off events. For 165684/165687 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17885 event pairs, 585 based on Foata normal form. 4/3517 useless extension candidates. Maximal degree in co-relation 24176. Up to 2986 conditions per place. [2024-06-14 11:48:01,503 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 110 selfloop transitions, 60 changer transitions 0/177 dead transitions. [2024-06-14 11:48:01,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 177 transitions, 1726 flow [2024-06-14 11:48:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:48:01,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 11:48:01,505 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 1036 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:48:01,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 177 transitions, 1726 flow [2024-06-14 11:48:01,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1650 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:01,569 INFO L231 Difference]: Finished difference. Result has 126 places, 140 transitions, 1249 flow [2024-06-14 11:48:01,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=126, PETRI_TRANSITIONS=140} [2024-06-14 11:48:01,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 11:48:01,569 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 140 transitions, 1249 flow [2024-06-14 11:48:01,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:01,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:01,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:48:01,570 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:01,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1403682347, now seen corresponding path program 5 times [2024-06-14 11:48:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778257018] [2024-06-14 11:48:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:02,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:02,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778257018] [2024-06-14 11:48:02,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778257018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:02,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:02,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510291881] [2024-06-14 11:48:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:02,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:03,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:03,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 140 transitions, 1249 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:03,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:03,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:03,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:03,790 INFO L124 PetriNetUnfolderBase]: 2295/3530 cut-off events. [2024-06-14 11:48:03,790 INFO L125 PetriNetUnfolderBase]: For 176560/176563 co-relation queries the response was YES. [2024-06-14 11:48:03,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25237 conditions, 3530 events. 2295/3530 cut-off events. For 176560/176563 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17870 event pairs, 596 based on Foata normal form. 4/3525 useless extension candidates. Maximal degree in co-relation 25178. Up to 3025 conditions per place. [2024-06-14 11:48:03,818 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 117 selfloop transitions, 54 changer transitions 0/178 dead transitions. [2024-06-14 11:48:03,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 178 transitions, 1755 flow [2024-06-14 11:48:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:48:03,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-14 11:48:03,820 INFO L175 Difference]: Start difference. First operand has 126 places, 140 transitions, 1249 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:48:03,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 178 transitions, 1755 flow [2024-06-14 11:48:03,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 1659 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:03,911 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1343 flow [2024-06-14 11:48:03,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1343, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-14 11:48:03,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 11:48:03,912 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1343 flow [2024-06-14 11:48:03,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:03,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:03,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:03,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:48:03,921 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:03,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1823323963, now seen corresponding path program 3 times [2024-06-14 11:48:03,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:03,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925830742] [2024-06-14 11:48:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:03,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:05,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925830742] [2024-06-14 11:48:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925830742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444406224] [2024-06-14 11:48:05,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:05,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:05,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1343 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:05,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:05,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:05,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:06,186 INFO L124 PetriNetUnfolderBase]: 2312/3558 cut-off events. [2024-06-14 11:48:06,186 INFO L125 PetriNetUnfolderBase]: For 188121/188124 co-relation queries the response was YES. [2024-06-14 11:48:06,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26164 conditions, 3558 events. 2312/3558 cut-off events. For 188121/188124 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18072 event pairs, 644 based on Foata normal form. 6/3558 useless extension candidates. Maximal degree in co-relation 26103. Up to 3252 conditions per place. [2024-06-14 11:48:06,216 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-14 11:48:06,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 176 transitions, 1819 flow [2024-06-14 11:48:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:48:06,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:48:06,217 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1343 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:48:06,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 176 transitions, 1819 flow [2024-06-14 11:48:06,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 176 transitions, 1653 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:06,302 INFO L231 Difference]: Finished difference. Result has 132 places, 145 transitions, 1310 flow [2024-06-14 11:48:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=132, PETRI_TRANSITIONS=145} [2024-06-14 11:48:06,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 11:48:06,303 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 145 transitions, 1310 flow [2024-06-14 11:48:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:06,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:06,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:48:06,303 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:06,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1823323839, now seen corresponding path program 6 times [2024-06-14 11:48:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942184172] [2024-06-14 11:48:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942184172] [2024-06-14 11:48:07,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942184172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:07,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:07,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:07,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279209704] [2024-06-14 11:48:07,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:07,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:07,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:07,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:07,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 145 transitions, 1310 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:07,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:07,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:07,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:08,514 INFO L124 PetriNetUnfolderBase]: 2342/3610 cut-off events. [2024-06-14 11:48:08,514 INFO L125 PetriNetUnfolderBase]: For 201520/201523 co-relation queries the response was YES. [2024-06-14 11:48:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3610 events. 2342/3610 cut-off events. For 201520/201523 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18429 event pairs, 581 based on Foata normal form. 4/3606 useless extension candidates. Maximal degree in co-relation 26785. Up to 3053 conditions per place. [2024-06-14 11:48:08,544 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 118 selfloop transitions, 63 changer transitions 0/188 dead transitions. [2024-06-14 11:48:08,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 1858 flow [2024-06-14 11:48:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:08,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:48:08,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:48:08,545 INFO L175 Difference]: Start difference. First operand has 132 places, 145 transitions, 1310 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:48:08,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 1858 flow [2024-06-14 11:48:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 1743 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:08,639 INFO L231 Difference]: Finished difference. Result has 135 places, 148 transitions, 1415 flow [2024-06-14 11:48:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1415, PETRI_PLACES=135, PETRI_TRANSITIONS=148} [2024-06-14 11:48:08,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 11:48:08,639 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 148 transitions, 1415 flow [2024-06-14 11:48:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:48:08,640 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:08,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash -952586078, now seen corresponding path program 1 times [2024-06-14 11:48:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:08,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310020120] [2024-06-14 11:48:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310020120] [2024-06-14 11:48:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310020120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910702939] [2024-06-14 11:48:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:09,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:09,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:09,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:09,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 148 transitions, 1415 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:09,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:09,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:09,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:10,190 INFO L124 PetriNetUnfolderBase]: 2375/3648 cut-off events. [2024-06-14 11:48:10,190 INFO L125 PetriNetUnfolderBase]: For 214531/214539 co-relation queries the response was YES. [2024-06-14 11:48:10,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27642 conditions, 3648 events. 2375/3648 cut-off events. For 214531/214539 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18245 event pairs, 764 based on Foata normal form. 8/3637 useless extension candidates. Maximal degree in co-relation 27579. Up to 3426 conditions per place. [2024-06-14 11:48:10,221 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 128 selfloop transitions, 18 changer transitions 0/170 dead transitions. [2024-06-14 11:48:10,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 170 transitions, 1883 flow [2024-06-14 11:48:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-14 11:48:10,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 11:48:10,222 INFO L175 Difference]: Start difference. First operand has 135 places, 148 transitions, 1415 flow. Second operand 6 states and 116 transitions. [2024-06-14 11:48:10,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 170 transitions, 1883 flow [2024-06-14 11:48:10,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 170 transitions, 1689 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:10,319 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1336 flow [2024-06-14 11:48:10,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1336, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-14 11:48:10,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 11:48:10,320 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1336 flow [2024-06-14 11:48:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:10,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:10,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:10,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:48:10,320 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:10,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 896342337, now seen corresponding path program 7 times [2024-06-14 11:48:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:10,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116911758] [2024-06-14 11:48:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:11,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:11,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116911758] [2024-06-14 11:48:11,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116911758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:11,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846277180] [2024-06-14 11:48:11,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:11,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:11,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:11,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1336 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:11,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:11,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:11,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:12,521 INFO L124 PetriNetUnfolderBase]: 2413/3702 cut-off events. [2024-06-14 11:48:12,522 INFO L125 PetriNetUnfolderBase]: For 212714/212714 co-relation queries the response was YES. [2024-06-14 11:48:12,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27902 conditions, 3702 events. 2413/3702 cut-off events. For 212714/212714 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18840 event pairs, 599 based on Foata normal form. 4/3697 useless extension candidates. Maximal degree in co-relation 27838. Up to 3256 conditions per place. [2024-06-14 11:48:12,550 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 148 selfloop transitions, 41 changer transitions 0/198 dead transitions. [2024-06-14 11:48:12,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 2106 flow [2024-06-14 11:48:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:48:12,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-14 11:48:12,551 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1336 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:48:12,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 2106 flow [2024-06-14 11:48:12,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 198 transitions, 2072 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:48:12,660 INFO L231 Difference]: Finished difference. Result has 141 places, 160 transitions, 1551 flow [2024-06-14 11:48:12,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1551, PETRI_PLACES=141, PETRI_TRANSITIONS=160} [2024-06-14 11:48:12,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 11:48:12,661 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 160 transitions, 1551 flow [2024-06-14 11:48:12,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:12,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:12,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:12,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:48:12,662 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)] === [2024-06-14 11:48:12,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash -445918757, now seen corresponding path program 4 times [2024-06-14 11:48:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997010535] [2024-06-14 11:48:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997010535] [2024-06-14 11:48:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997010535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084536963] [2024-06-14 11:48:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:13,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:13,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 1551 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:13,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:13,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:13,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:14,601 INFO L124 PetriNetUnfolderBase]: 2403/3688 cut-off events. [2024-06-14 11:48:14,601 INFO L125 PetriNetUnfolderBase]: For 223409/223409 co-relation queries the response was YES. [2024-06-14 11:48:14,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28452 conditions, 3688 events. 2403/3688 cut-off events. For 223409/223409 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18770 event pairs, 620 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 28386. Up to 3436 conditions per place. [2024-06-14 11:48:14,632 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 162 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-14 11:48:14,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 190 transitions, 2049 flow [2024-06-14 11:48:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 11:48:14,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 11:48:14,633 INFO L175 Difference]: Start difference. First operand has 141 places, 160 transitions, 1551 flow. Second operand 9 states and 165 transitions. [2024-06-14 11:48:14,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 190 transitions, 2049 flow [2024-06-14 11:48:14,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 190 transitions, 1910 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:14,773 INFO L231 Difference]: Finished difference. Result has 144 places, 162 transitions, 1527 flow [2024-06-14 11:48:14,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1527, PETRI_PLACES=144, PETRI_TRANSITIONS=162} [2024-06-14 11:48:14,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 11:48:14,774 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 162 transitions, 1527 flow [2024-06-14 11:48:14,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:14,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:14,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:14,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:48:14,774 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)] === [2024-06-14 11:48:14,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash -445741003, now seen corresponding path program 8 times [2024-06-14 11:48:14,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:14,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635193805] [2024-06-14 11:48:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:15,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:15,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635193805] [2024-06-14 11:48:15,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635193805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:15,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:15,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:15,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120134566] [2024-06-14 11:48:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:16,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:16,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 162 transitions, 1527 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:16,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:16,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:16,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:16,792 INFO L124 PetriNetUnfolderBase]: 2418/3713 cut-off events. [2024-06-14 11:48:16,792 INFO L125 PetriNetUnfolderBase]: For 233670/233670 co-relation queries the response was YES. [2024-06-14 11:48:16,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28778 conditions, 3713 events. 2418/3713 cut-off events. For 233670/233670 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18923 event pairs, 605 based on Foata normal form. 4/3708 useless extension candidates. Maximal degree in co-relation 28710. Up to 3338 conditions per place. [2024-06-14 11:48:16,823 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 153 selfloop transitions, 34 changer transitions 0/196 dead transitions. [2024-06-14 11:48:16,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 2039 flow [2024-06-14 11:48:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 11:48:16,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 11:48:16,824 INFO L175 Difference]: Start difference. First operand has 144 places, 162 transitions, 1527 flow. Second operand 9 states and 173 transitions. [2024-06-14 11:48:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 2039 flow [2024-06-14 11:48:16,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 1942 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:16,959 INFO L231 Difference]: Finished difference. Result has 146 places, 165 transitions, 1566 flow [2024-06-14 11:48:16,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1566, PETRI_PLACES=146, PETRI_TRANSITIONS=165} [2024-06-14 11:48:16,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 11:48:16,960 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 165 transitions, 1566 flow [2024-06-14 11:48:16,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:16,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:16,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:16,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:48:16,961 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)] === [2024-06-14 11:48:16,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1132710641, now seen corresponding path program 1 times [2024-06-14 11:48:16,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:16,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853944099] [2024-06-14 11:48:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853944099] [2024-06-14 11:48:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853944099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:18,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743327910] [2024-06-14 11:48:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:18,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:48:18,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 165 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:18,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:18,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:48:18,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:19,249 INFO L124 PetriNetUnfolderBase]: 2678/4033 cut-off events. [2024-06-14 11:48:19,249 INFO L125 PetriNetUnfolderBase]: For 254564/254574 co-relation queries the response was YES. [2024-06-14 11:48:19,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30947 conditions, 4033 events. 2678/4033 cut-off events. For 254564/254574 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19803 event pairs, 1164 based on Foata normal form. 2/4014 useless extension candidates. Maximal degree in co-relation 30878. Up to 3830 conditions per place. [2024-06-14 11:48:19,279 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 165 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-06-14 11:48:19,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 2112 flow [2024-06-14 11:48:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 11:48:19,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 11:48:19,280 INFO L175 Difference]: Start difference. First operand has 146 places, 165 transitions, 1566 flow. Second operand 9 states and 153 transitions. [2024-06-14 11:48:19,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 2112 flow [2024-06-14 11:48:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2000 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:19,441 INFO L231 Difference]: Finished difference. Result has 149 places, 173 transitions, 1639 flow [2024-06-14 11:48:19,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1639, PETRI_PLACES=149, PETRI_TRANSITIONS=173} [2024-06-14 11:48:19,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 11:48:19,442 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 173 transitions, 1639 flow [2024-06-14 11:48:19,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:19,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:19,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:19,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:48:19,442 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)] === [2024-06-14 11:48:19,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1124421117, now seen corresponding path program 9 times [2024-06-14 11:48:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:19,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011021227] [2024-06-14 11:48:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:20,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011021227] [2024-06-14 11:48:20,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011021227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:20,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:20,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:20,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393750921] [2024-06-14 11:48:20,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:20,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:20,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:20,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 173 transitions, 1639 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:20,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:20,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:20,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:21,664 INFO L124 PetriNetUnfolderBase]: 2435/3738 cut-off events. [2024-06-14 11:48:21,664 INFO L125 PetriNetUnfolderBase]: For 257360/257370 co-relation queries the response was YES. [2024-06-14 11:48:21,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29362 conditions, 3738 events. 2435/3738 cut-off events. For 257360/257370 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19182 event pairs, 978 based on Foata normal form. 6/3719 useless extension candidates. Maximal degree in co-relation 29291. Up to 3408 conditions per place. [2024-06-14 11:48:21,697 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 167 selfloop transitions, 26 changer transitions 0/202 dead transitions. [2024-06-14 11:48:21,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 202 transitions, 2103 flow [2024-06-14 11:48:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:48:21,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:48:21,698 INFO L175 Difference]: Start difference. First operand has 149 places, 173 transitions, 1639 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:48:21,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 202 transitions, 2103 flow [2024-06-14 11:48:21,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 202 transitions, 1987 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:21,887 INFO L231 Difference]: Finished difference. Result has 152 places, 173 transitions, 1583 flow [2024-06-14 11:48:21,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1583, PETRI_PLACES=152, PETRI_TRANSITIONS=173} [2024-06-14 11:48:21,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 11:48:21,888 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 173 transitions, 1583 flow [2024-06-14 11:48:21,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:21,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:21,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:21,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:48:21,889 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:21,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:21,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1490271493, now seen corresponding path program 1 times [2024-06-14 11:48:21,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:21,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435356208] [2024-06-14 11:48:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:21,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:22,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435356208] [2024-06-14 11:48:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435356208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:22,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316649563] [2024-06-14 11:48:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:22,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:22,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 173 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 11:48:22,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:22,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:22,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:23,537 INFO L124 PetriNetUnfolderBase]: 2503/3804 cut-off events. [2024-06-14 11:48:23,537 INFO L125 PetriNetUnfolderBase]: For 272055/272098 co-relation queries the response was YES. [2024-06-14 11:48:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29381 conditions, 3804 events. 2503/3804 cut-off events. For 272055/272098 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19211 event pairs, 1197 based on Foata normal form. 21/3776 useless extension candidates. Maximal degree in co-relation 29309. Up to 3601 conditions per place. [2024-06-14 11:48:23,571 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 148 selfloop transitions, 15 changer transitions 0/190 dead transitions. [2024-06-14 11:48:23,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 190 transitions, 1981 flow [2024-06-14 11:48:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 11:48:23,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 11:48:23,572 INFO L175 Difference]: Start difference. First operand has 152 places, 173 transitions, 1583 flow. Second operand 7 states and 123 transitions. [2024-06-14 11:48:23,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 190 transitions, 1981 flow [2024-06-14 11:48:23,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 190 transitions, 1911 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:23,733 INFO L231 Difference]: Finished difference. Result has 152 places, 179 transitions, 1611 flow [2024-06-14 11:48:23,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1611, PETRI_PLACES=152, PETRI_TRANSITIONS=179} [2024-06-14 11:48:23,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 11:48:23,734 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 179 transitions, 1611 flow [2024-06-14 11:48:23,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 11:48:23,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:23,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:23,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:48:23,734 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:23,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash -940205918, now seen corresponding path program 2 times [2024-06-14 11:48:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824232399] [2024-06-14 11:48:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:23,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:24,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:24,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824232399] [2024-06-14 11:48:24,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824232399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:24,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63979817] [2024-06-14 11:48:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:24,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:24,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 179 transitions, 1611 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:24,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:24,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:24,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:25,128 INFO L124 PetriNetUnfolderBase]: 2497/3796 cut-off events. [2024-06-14 11:48:25,129 INFO L125 PetriNetUnfolderBase]: For 278130/278173 co-relation queries the response was YES. [2024-06-14 11:48:25,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29854 conditions, 3796 events. 2497/3796 cut-off events. For 278130/278173 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19158 event pairs, 1196 based on Foata normal form. 19/3766 useless extension candidates. Maximal degree in co-relation 29780. Up to 3603 conditions per place. [2024-06-14 11:48:25,165 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 148 selfloop transitions, 12 changer transitions 0/187 dead transitions. [2024-06-14 11:48:25,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 1951 flow [2024-06-14 11:48:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 11:48:25,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 11:48:25,166 INFO L175 Difference]: Start difference. First operand has 152 places, 179 transitions, 1611 flow. Second operand 6 states and 107 transitions. [2024-06-14 11:48:25,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 1951 flow [2024-06-14 11:48:25,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 1883 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:25,346 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1573 flow [2024-06-14 11:48:25,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1573, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-14 11:48:25,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-14 11:48:25,347 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1573 flow [2024-06-14 11:48:25,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:25,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:25,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:25,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:48:25,347 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:25,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 581942396, now seen corresponding path program 1 times [2024-06-14 11:48:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:25,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465667311] [2024-06-14 11:48:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465667311] [2024-06-14 11:48:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465667311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:26,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:26,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:26,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276895731] [2024-06-14 11:48:26,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:26,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:26,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:48:26,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1573 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:26,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:26,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:48:26,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:26,828 INFO L124 PetriNetUnfolderBase]: 2833/4194 cut-off events. [2024-06-14 11:48:26,829 INFO L125 PetriNetUnfolderBase]: For 281319/281319 co-relation queries the response was YES. [2024-06-14 11:48:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32215 conditions, 4194 events. 2833/4194 cut-off events. For 281319/281319 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19837 event pairs, 1284 based on Foata normal form. 1/4193 useless extension candidates. Maximal degree in co-relation 32140. Up to 4149 conditions per place. [2024-06-14 11:48:26,865 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 177 selfloop transitions, 17 changer transitions 0/197 dead transitions. [2024-06-14 11:48:26,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 197 transitions, 2161 flow [2024-06-14 11:48:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 11:48:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 11:48:26,869 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1573 flow. Second operand 6 states and 103 transitions. [2024-06-14 11:48:26,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 197 transitions, 2161 flow [2024-06-14 11:48:27,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 2120 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:27,143 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1662 flow [2024-06-14 11:48:27,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1662, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-14 11:48:27,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 11:48:27,143 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1662 flow [2024-06-14 11:48:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:27,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:27,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:48:27,144 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:27,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -453117116, now seen corresponding path program 2 times [2024-06-14 11:48:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281832084] [2024-06-14 11:48:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281832084] [2024-06-14 11:48:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281832084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:27,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738952191] [2024-06-14 11:48:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:27,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 11:48:27,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:27,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:27,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 11:48:27,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:28,670 INFO L124 PetriNetUnfolderBase]: 2830/4191 cut-off events. [2024-06-14 11:48:28,671 INFO L125 PetriNetUnfolderBase]: For 293160/293163 co-relation queries the response was YES. [2024-06-14 11:48:28,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32739 conditions, 4191 events. 2830/4191 cut-off events. For 293160/293163 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19865 event pairs, 1287 based on Foata normal form. 3/4191 useless extension candidates. Maximal degree in co-relation 32663. Up to 4146 conditions per place. [2024-06-14 11:48:28,702 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 173 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2024-06-14 11:48:28,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 193 transitions, 2062 flow [2024-06-14 11:48:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 11:48:28,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 11:48:28,702 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1662 flow. Second operand 6 states and 99 transitions. [2024-06-14 11:48:28,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 193 transitions, 2062 flow [2024-06-14 11:48:28,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 193 transitions, 1989 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 11:48:28,896 INFO L231 Difference]: Finished difference. Result has 159 places, 185 transitions, 1629 flow [2024-06-14 11:48:28,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1629, PETRI_PLACES=159, PETRI_TRANSITIONS=185} [2024-06-14 11:48:28,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 11:48:28,897 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 185 transitions, 1629 flow [2024-06-14 11:48:28,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:28,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:28,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:48:28,897 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:28,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash -449399949, now seen corresponding path program 1 times [2024-06-14 11:48:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:28,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797094005] [2024-06-14 11:48:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797094005] [2024-06-14 11:48:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797094005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:30,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662755364] [2024-06-14 11:48:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:30,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:30,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:30,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:30,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:30,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 185 transitions, 1629 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:30,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:30,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:30,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:31,485 INFO L124 PetriNetUnfolderBase]: 2853/4414 cut-off events. [2024-06-14 11:48:31,485 INFO L125 PetriNetUnfolderBase]: For 343792/343798 co-relation queries the response was YES. [2024-06-14 11:48:31,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35470 conditions, 4414 events. 2853/4414 cut-off events. For 343792/343798 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23640 event pairs, 691 based on Foata normal form. 22/4416 useless extension candidates. Maximal degree in co-relation 35392. Up to 3613 conditions per place. [2024-06-14 11:48:31,526 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 228 selfloop transitions, 50 changer transitions 0/289 dead transitions. [2024-06-14 11:48:31,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 289 transitions, 2934 flow [2024-06-14 11:48:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:48:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:48:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-14 11:48:31,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-14 11:48:31,527 INFO L175 Difference]: Start difference. First operand has 159 places, 185 transitions, 1629 flow. Second operand 13 states and 258 transitions. [2024-06-14 11:48:31,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 289 transitions, 2934 flow [2024-06-14 11:48:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 2888 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:31,791 INFO L231 Difference]: Finished difference. Result has 173 places, 221 transitions, 2115 flow [2024-06-14 11:48:31,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2115, PETRI_PLACES=173, PETRI_TRANSITIONS=221} [2024-06-14 11:48:31,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 11:48:31,792 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 221 transitions, 2115 flow [2024-06-14 11:48:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:31,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:48:31,792 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:31,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1118389837, now seen corresponding path program 2 times [2024-06-14 11:48:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:31,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609331485] [2024-06-14 11:48:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:31,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:32,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:32,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609331485] [2024-06-14 11:48:32,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609331485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:32,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:32,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:32,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712110976] [2024-06-14 11:48:32,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:32,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:33,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:33,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 221 transitions, 2115 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:33,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:33,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:33,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:34,389 INFO L124 PetriNetUnfolderBase]: 3516/5491 cut-off events. [2024-06-14 11:48:34,389 INFO L125 PetriNetUnfolderBase]: For 427989/428001 co-relation queries the response was YES. [2024-06-14 11:48:34,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46011 conditions, 5491 events. 3516/5491 cut-off events. For 427989/428001 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 31170 event pairs, 947 based on Foata normal form. 22/5492 useless extension candidates. Maximal degree in co-relation 45926. Up to 4351 conditions per place. [2024-06-14 11:48:34,438 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 259 selfloop transitions, 83 changer transitions 0/353 dead transitions. [2024-06-14 11:48:34,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 353 transitions, 4094 flow [2024-06-14 11:48:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:48:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:48:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-14 11:48:34,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:48:34,439 INFO L175 Difference]: Start difference. First operand has 173 places, 221 transitions, 2115 flow. Second operand 12 states and 240 transitions. [2024-06-14 11:48:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 353 transitions, 4094 flow [2024-06-14 11:48:34,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 353 transitions, 3995 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:34,842 INFO L231 Difference]: Finished difference. Result has 187 places, 289 transitions, 3240 flow [2024-06-14 11:48:34,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3240, PETRI_PLACES=187, PETRI_TRANSITIONS=289} [2024-06-14 11:48:34,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 11:48:34,842 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 289 transitions, 3240 flow [2024-06-14 11:48:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:34,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:34,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:48:34,843 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:34,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -77447271, now seen corresponding path program 3 times [2024-06-14 11:48:34,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:34,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31042898] [2024-06-14 11:48:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31042898] [2024-06-14 11:48:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31042898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633557979] [2024-06-14 11:48:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:35,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:35,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:35,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 289 transitions, 3240 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:35,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:35,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:35,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:37,478 INFO L124 PetriNetUnfolderBase]: 4353/6871 cut-off events. [2024-06-14 11:48:37,478 INFO L125 PetriNetUnfolderBase]: For 575418/575444 co-relation queries the response was YES. [2024-06-14 11:48:37,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61030 conditions, 6871 events. 4353/6871 cut-off events. For 575418/575444 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 41898 event pairs, 863 based on Foata normal form. 26/6847 useless extension candidates. Maximal degree in co-relation 60937. Up to 3965 conditions per place. [2024-06-14 11:48:37,562 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 228 selfloop transitions, 142 changer transitions 0/381 dead transitions. [2024-06-14 11:48:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 381 transitions, 5205 flow [2024-06-14 11:48:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:48:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:48:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 11:48:37,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799154334038055 [2024-06-14 11:48:37,565 INFO L175 Difference]: Start difference. First operand has 187 places, 289 transitions, 3240 flow. Second operand 11 states and 227 transitions. [2024-06-14 11:48:37,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 381 transitions, 5205 flow [2024-06-14 11:48:38,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 381 transitions, 5100 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-14 11:48:38,105 INFO L231 Difference]: Finished difference. Result has 199 places, 318 transitions, 4145 flow [2024-06-14 11:48:38,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4145, PETRI_PLACES=199, PETRI_TRANSITIONS=318} [2024-06-14 11:48:38,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-14 11:48:38,105 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 318 transitions, 4145 flow [2024-06-14 11:48:38,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:38,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:38,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:48:38,106 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1331748185, now seen corresponding path program 4 times [2024-06-14 11:48:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401462186] [2024-06-14 11:48:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:39,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401462186] [2024-06-14 11:48:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401462186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:39,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:39,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96989130] [2024-06-14 11:48:39,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:39,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:39,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:39,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 318 transitions, 4145 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:39,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:39,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:39,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:40,999 INFO L124 PetriNetUnfolderBase]: 5075/8072 cut-off events. [2024-06-14 11:48:40,999 INFO L125 PetriNetUnfolderBase]: For 691457/691481 co-relation queries the response was YES. [2024-06-14 11:48:41,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73768 conditions, 8072 events. 5075/8072 cut-off events. For 691457/691481 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 51131 event pairs, 1371 based on Foata normal form. 34/8064 useless extension candidates. Maximal degree in co-relation 73670. Up to 5407 conditions per place. [2024-06-14 11:48:41,082 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 247 selfloop transitions, 183 changer transitions 0/441 dead transitions. [2024-06-14 11:48:41,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 441 transitions, 6565 flow [2024-06-14 11:48:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:48:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:48:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 11:48:41,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 11:48:41,084 INFO L175 Difference]: Start difference. First operand has 199 places, 318 transitions, 4145 flow. Second operand 12 states and 242 transitions. [2024-06-14 11:48:41,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 441 transitions, 6565 flow [2024-06-14 11:48:41,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 441 transitions, 6326 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:41,879 INFO L231 Difference]: Finished difference. Result has 210 places, 378 transitions, 5529 flow [2024-06-14 11:48:41,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5529, PETRI_PLACES=210, PETRI_TRANSITIONS=378} [2024-06-14 11:48:41,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 11:48:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 378 transitions, 5529 flow [2024-06-14 11:48:41,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:41,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:41,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:41,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:48:41,880 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:41,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1329870515, now seen corresponding path program 5 times [2024-06-14 11:48:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:41,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143884730] [2024-06-14 11:48:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:41,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:42,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:42,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143884730] [2024-06-14 11:48:42,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143884730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:42,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:42,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:42,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146141894] [2024-06-14 11:48:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:42,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:42,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:43,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:43,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 378 transitions, 5529 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:43,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:43,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:43,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:45,011 INFO L124 PetriNetUnfolderBase]: 5539/8874 cut-off events. [2024-06-14 11:48:45,012 INFO L125 PetriNetUnfolderBase]: For 819495/819507 co-relation queries the response was YES. [2024-06-14 11:48:45,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81881 conditions, 8874 events. 5539/8874 cut-off events. For 819495/819507 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 57816 event pairs, 1938 based on Foata normal form. 90/8922 useless extension candidates. Maximal degree in co-relation 81777. Up to 7129 conditions per place. [2024-06-14 11:48:45,338 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 287 selfloop transitions, 178 changer transitions 0/476 dead transitions. [2024-06-14 11:48:45,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 476 transitions, 7707 flow [2024-06-14 11:48:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:48:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:48:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-14 11:48:45,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 11:48:45,340 INFO L175 Difference]: Start difference. First operand has 210 places, 378 transitions, 5529 flow. Second operand 12 states and 236 transitions. [2024-06-14 11:48:45,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 476 transitions, 7707 flow [2024-06-14 11:48:46,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 476 transitions, 7544 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:46,151 INFO L231 Difference]: Finished difference. Result has 218 places, 419 transitions, 6671 flow [2024-06-14 11:48:46,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6671, PETRI_PLACES=218, PETRI_TRANSITIONS=419} [2024-06-14 11:48:46,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 11:48:46,152 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 419 transitions, 6671 flow [2024-06-14 11:48:46,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:46,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:46,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:48:46,152 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)] === [2024-06-14 11:48:46,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1014128075, now seen corresponding path program 6 times [2024-06-14 11:48:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39620562] [2024-06-14 11:48:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:46,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39620562] [2024-06-14 11:48:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39620562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:47,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:47,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499534688] [2024-06-14 11:48:47,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:47,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:47,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 419 transitions, 6671 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:47,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:47,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:49,412 INFO L124 PetriNetUnfolderBase]: 5679/9097 cut-off events. [2024-06-14 11:48:49,412 INFO L125 PetriNetUnfolderBase]: For 780057/780069 co-relation queries the response was YES. [2024-06-14 11:48:49,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83311 conditions, 9097 events. 5679/9097 cut-off events. For 780057/780069 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59575 event pairs, 1766 based on Foata normal form. 66/9121 useless extension candidates. Maximal degree in co-relation 83206. Up to 6887 conditions per place. [2024-06-14 11:48:49,523 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 290 selfloop transitions, 188 changer transitions 0/489 dead transitions. [2024-06-14 11:48:49,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 489 transitions, 8325 flow [2024-06-14 11:48:49,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:48:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:48:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-14 11:48:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-14 11:48:49,524 INFO L175 Difference]: Start difference. First operand has 218 places, 419 transitions, 6671 flow. Second operand 12 states and 239 transitions. [2024-06-14 11:48:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 489 transitions, 8325 flow [2024-06-14 11:48:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 489 transitions, 7915 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:50,787 INFO L231 Difference]: Finished difference. Result has 223 places, 428 transitions, 7008 flow [2024-06-14 11:48:50,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7008, PETRI_PLACES=223, PETRI_TRANSITIONS=428} [2024-06-14 11:48:50,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 11:48:50,787 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 428 transitions, 7008 flow [2024-06-14 11:48:50,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:50,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:50,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:50,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:48:50,788 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:50,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash 359487659, now seen corresponding path program 7 times [2024-06-14 11:48:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502881804] [2024-06-14 11:48:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502881804] [2024-06-14 11:48:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502881804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:52,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:52,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:52,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393148965] [2024-06-14 11:48:52,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:52,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:52,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 428 transitions, 7008 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:52,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:52,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:52,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:55,152 INFO L124 PetriNetUnfolderBase]: 5782/9315 cut-off events. [2024-06-14 11:48:55,152 INFO L125 PetriNetUnfolderBase]: For 768064/768076 co-relation queries the response was YES. [2024-06-14 11:48:55,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84271 conditions, 9315 events. 5782/9315 cut-off events. For 768064/768076 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 61756 event pairs, 2043 based on Foata normal form. 66/9362 useless extension candidates. Maximal degree in co-relation 84164. Up to 7864 conditions per place. [2024-06-14 11:48:55,251 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 368 selfloop transitions, 116 changer transitions 0/495 dead transitions. [2024-06-14 11:48:55,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 495 transitions, 8578 flow [2024-06-14 11:48:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:48:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:48:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 247 transitions. [2024-06-14 11:48:55,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:48:55,253 INFO L175 Difference]: Start difference. First operand has 223 places, 428 transitions, 7008 flow. Second operand 13 states and 247 transitions. [2024-06-14 11:48:55,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 495 transitions, 8578 flow [2024-06-14 11:48:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 495 transitions, 8050 flow, removed 90 selfloop flow, removed 9 redundant places. [2024-06-14 11:48:56,126 INFO L231 Difference]: Finished difference. Result has 230 places, 440 transitions, 7150 flow [2024-06-14 11:48:56,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7150, PETRI_PLACES=230, PETRI_TRANSITIONS=440} [2024-06-14 11:48:56,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-14 11:48:56,127 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 440 transitions, 7150 flow [2024-06-14 11:48:56,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:56,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:56,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:48:56,128 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:56,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash 359483939, now seen corresponding path program 8 times [2024-06-14 11:48:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:56,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493431977] [2024-06-14 11:48:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:56,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:57,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:57,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493431977] [2024-06-14 11:48:57,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493431977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:57,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:57,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268274241] [2024-06-14 11:48:57,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:57,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:57,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:57,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:48:57,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 440 transitions, 7150 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:48:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:00,363 INFO L124 PetriNetUnfolderBase]: 5700/9179 cut-off events. [2024-06-14 11:49:00,364 INFO L125 PetriNetUnfolderBase]: For 688415/688427 co-relation queries the response was YES. [2024-06-14 11:49:00,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80079 conditions, 9179 events. 5700/9179 cut-off events. For 688415/688427 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 60627 event pairs, 1834 based on Foata normal form. 46/9206 useless extension candidates. Maximal degree in co-relation 79968. Up to 7314 conditions per place. [2024-06-14 11:49:00,456 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 362 selfloop transitions, 124 changer transitions 0/497 dead transitions. [2024-06-14 11:49:00,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 497 transitions, 8419 flow [2024-06-14 11:49:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:49:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:49:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-14 11:49:00,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45542635658914726 [2024-06-14 11:49:00,457 INFO L175 Difference]: Start difference. First operand has 230 places, 440 transitions, 7150 flow. Second operand 12 states and 235 transitions. [2024-06-14 11:49:00,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 497 transitions, 8419 flow [2024-06-14 11:49:01,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 497 transitions, 8137 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:01,436 INFO L231 Difference]: Finished difference. Result has 235 places, 442 transitions, 7198 flow [2024-06-14 11:49:01,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7198, PETRI_PLACES=235, PETRI_TRANSITIONS=442} [2024-06-14 11:49:01,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 11:49:01,436 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 442 transitions, 7198 flow [2024-06-14 11:49:01,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:01,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:01,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:49:01,437 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:01,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1747042313, now seen corresponding path program 9 times [2024-06-14 11:49:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523674907] [2024-06-14 11:49:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:02,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:02,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523674907] [2024-06-14 11:49:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523674907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:02,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473061314] [2024-06-14 11:49:02,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:02,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:02,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 442 transitions, 7198 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:02,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:02,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:02,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:05,712 INFO L124 PetriNetUnfolderBase]: 6062/9752 cut-off events. [2024-06-14 11:49:05,712 INFO L125 PetriNetUnfolderBase]: For 677150/677169 co-relation queries the response was YES. [2024-06-14 11:49:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83426 conditions, 9752 events. 6062/9752 cut-off events. For 677150/677169 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 65169 event pairs, 2001 based on Foata normal form. 32/9764 useless extension candidates. Maximal degree in co-relation 83313. Up to 8547 conditions per place. [2024-06-14 11:49:05,814 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 427 selfloop transitions, 135 changer transitions 0/573 dead transitions. [2024-06-14 11:49:05,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 573 transitions, 9357 flow [2024-06-14 11:49:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:49:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:49:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-14 11:49:05,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46723044397463004 [2024-06-14 11:49:05,816 INFO L175 Difference]: Start difference. First operand has 235 places, 442 transitions, 7198 flow. Second operand 11 states and 221 transitions. [2024-06-14 11:49:05,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 573 transitions, 9357 flow [2024-06-14 11:49:06,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 573 transitions, 9083 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-14 11:49:06,820 INFO L231 Difference]: Finished difference. Result has 242 places, 509 transitions, 8032 flow [2024-06-14 11:49:06,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6924, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8032, PETRI_PLACES=242, PETRI_TRANSITIONS=509} [2024-06-14 11:49:06,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 11:49:06,821 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 509 transitions, 8032 flow [2024-06-14 11:49:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:06,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:06,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:49:06,822 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash -269039546, now seen corresponding path program 1 times [2024-06-14 11:49:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616053392] [2024-06-14 11:49:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:08,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:08,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616053392] [2024-06-14 11:49:08,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616053392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:08,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:08,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:08,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216019627] [2024-06-14 11:49:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:08,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:08,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:08,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:08,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:08,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 11:49:08,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 509 transitions, 8032 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:08,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:08,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 11:49:08,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:11,249 INFO L124 PetriNetUnfolderBase]: 7133/11064 cut-off events. [2024-06-14 11:49:11,249 INFO L125 PetriNetUnfolderBase]: For 715554/715569 co-relation queries the response was YES. [2024-06-14 11:49:11,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94579 conditions, 11064 events. 7133/11064 cut-off events. For 715554/715569 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 69950 event pairs, 2905 based on Foata normal form. 6/11037 useless extension candidates. Maximal degree in co-relation 94460. Up to 10546 conditions per place. [2024-06-14 11:49:11,367 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 486 selfloop transitions, 76 changer transitions 0/571 dead transitions. [2024-06-14 11:49:11,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 571 transitions, 9651 flow [2024-06-14 11:49:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:11,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 11:49:11,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-14 11:49:11,368 INFO L175 Difference]: Start difference. First operand has 242 places, 509 transitions, 8032 flow. Second operand 10 states and 189 transitions. [2024-06-14 11:49:11,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 571 transitions, 9651 flow [2024-06-14 11:49:12,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 571 transitions, 9594 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 11:49:12,703 INFO L231 Difference]: Finished difference. Result has 252 places, 531 transitions, 8455 flow [2024-06-14 11:49:12,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8455, PETRI_PLACES=252, PETRI_TRANSITIONS=531} [2024-06-14 11:49:12,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 11:49:12,704 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 531 transitions, 8455 flow [2024-06-14 11:49:12,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:12,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:12,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:12,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:49:12,705 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:12,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -274617407, now seen corresponding path program 10 times [2024-06-14 11:49:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298385687] [2024-06-14 11:49:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:14,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:14,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298385687] [2024-06-14 11:49:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298385687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:14,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:14,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655403397] [2024-06-14 11:49:14,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:14,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:14,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:14,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:14,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 531 transitions, 8455 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:14,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:14,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:14,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:17,253 INFO L124 PetriNetUnfolderBase]: 6219/10015 cut-off events. [2024-06-14 11:49:17,253 INFO L125 PetriNetUnfolderBase]: For 714103/714137 co-relation queries the response was YES. [2024-06-14 11:49:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87524 conditions, 10015 events. 6219/10015 cut-off events. For 714103/714137 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 67270 event pairs, 2030 based on Foata normal form. 38/10033 useless extension candidates. Maximal degree in co-relation 87401. Up to 8786 conditions per place. [2024-06-14 11:49:17,363 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 449 selfloop transitions, 135 changer transitions 0/596 dead transitions. [2024-06-14 11:49:17,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 596 transitions, 10149 flow [2024-06-14 11:49:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:49:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:49:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:49:17,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-14 11:49:17,365 INFO L175 Difference]: Start difference. First operand has 252 places, 531 transitions, 8455 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:49:17,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 596 transitions, 10149 flow [2024-06-14 11:49:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 596 transitions, 9936 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:18,564 INFO L231 Difference]: Finished difference. Result has 259 places, 535 transitions, 8616 flow [2024-06-14 11:49:18,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8254, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8616, PETRI_PLACES=259, PETRI_TRANSITIONS=535} [2024-06-14 11:49:18,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 11:49:18,565 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 535 transitions, 8616 flow [2024-06-14 11:49:18,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:18,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:18,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:49:18,566 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -274765277, now seen corresponding path program 11 times [2024-06-14 11:49:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:18,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111404092] [2024-06-14 11:49:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:20,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111404092] [2024-06-14 11:49:20,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111404092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:20,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068428743] [2024-06-14 11:49:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:20,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:20,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 535 transitions, 8616 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:20,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:20,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:20,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:23,305 INFO L124 PetriNetUnfolderBase]: 6431/10365 cut-off events. [2024-06-14 11:49:23,305 INFO L125 PetriNetUnfolderBase]: For 768278/768318 co-relation queries the response was YES. [2024-06-14 11:49:23,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91770 conditions, 10365 events. 6431/10365 cut-off events. For 768278/768318 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 70354 event pairs, 2104 based on Foata normal form. 30/10372 useless extension candidates. Maximal degree in co-relation 91647. Up to 8662 conditions per place. [2024-06-14 11:49:23,427 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 452 selfloop transitions, 147 changer transitions 0/611 dead transitions. [2024-06-14 11:49:23,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 611 transitions, 10642 flow [2024-06-14 11:49:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:49:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:49:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 11:49:23,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820295983086681 [2024-06-14 11:49:23,429 INFO L175 Difference]: Start difference. First operand has 259 places, 535 transitions, 8616 flow. Second operand 11 states and 228 transitions. [2024-06-14 11:49:23,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 611 transitions, 10642 flow [2024-06-14 11:49:24,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 611 transitions, 10386 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:24,667 INFO L231 Difference]: Finished difference. Result has 267 places, 544 transitions, 8866 flow [2024-06-14 11:49:24,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8866, PETRI_PLACES=267, PETRI_TRANSITIONS=544} [2024-06-14 11:49:24,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 11:49:24,668 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 544 transitions, 8866 flow [2024-06-14 11:49:24,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:24,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:24,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:24,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:49:24,668 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)] === [2024-06-14 11:49:24,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash -274761557, now seen corresponding path program 12 times [2024-06-14 11:49:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:24,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295115085] [2024-06-14 11:49:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:26,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:26,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295115085] [2024-06-14 11:49:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295115085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:26,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:26,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:26,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458483792] [2024-06-14 11:49:26,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:26,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:26,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:26,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:26,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:26,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 544 transitions, 8866 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:26,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:26,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:26,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:29,331 INFO L124 PetriNetUnfolderBase]: 6395/10309 cut-off events. [2024-06-14 11:49:29,331 INFO L125 PetriNetUnfolderBase]: For 763659/763699 co-relation queries the response was YES. [2024-06-14 11:49:29,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90659 conditions, 10309 events. 6395/10309 cut-off events. For 763659/763699 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 69889 event pairs, 2111 based on Foata normal form. 34/10320 useless extension candidates. Maximal degree in co-relation 90533. Up to 8910 conditions per place. [2024-06-14 11:49:29,474 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 454 selfloop transitions, 145 changer transitions 0/611 dead transitions. [2024-06-14 11:49:29,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 611 transitions, 10530 flow [2024-06-14 11:49:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:49:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:49:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 11:49:29,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 11:49:29,476 INFO L175 Difference]: Start difference. First operand has 267 places, 544 transitions, 8866 flow. Second operand 12 states and 242 transitions. [2024-06-14 11:49:29,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 611 transitions, 10530 flow [2024-06-14 11:49:30,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 611 transitions, 10324 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:30,925 INFO L231 Difference]: Finished difference. Result has 274 places, 545 transitions, 8977 flow [2024-06-14 11:49:30,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8660, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8977, PETRI_PLACES=274, PETRI_TRANSITIONS=545} [2024-06-14 11:49:30,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-14 11:49:30,927 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 545 transitions, 8977 flow [2024-06-14 11:49:30,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:30,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:30,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:49:30,927 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:30,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:30,928 INFO L85 PathProgramCache]: Analyzing trace with hash -982420301, now seen corresponding path program 2 times [2024-06-14 11:49:30,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:30,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476120098] [2024-06-14 11:49:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:31,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:31,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476120098] [2024-06-14 11:49:31,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476120098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:31,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:31,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:31,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582168853] [2024-06-14 11:49:31,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:31,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:31,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:31,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:31,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 545 transitions, 8977 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 11:49:31,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:31,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:31,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:34,717 INFO L124 PetriNetUnfolderBase]: 6987/10996 cut-off events. [2024-06-14 11:49:34,717 INFO L125 PetriNetUnfolderBase]: For 823712/823910 co-relation queries the response was YES. [2024-06-14 11:49:34,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97635 conditions, 10996 events. 6987/10996 cut-off events. For 823712/823910 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 72121 event pairs, 2555 based on Foata normal form. 75/10958 useless extension candidates. Maximal degree in co-relation 97506. Up to 10360 conditions per place. [2024-06-14 11:49:34,862 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 469 selfloop transitions, 43 changer transitions 0/577 dead transitions. [2024-06-14 11:49:34,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 577 transitions, 10304 flow [2024-06-14 11:49:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:49:34,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:49:34,863 INFO L175 Difference]: Start difference. First operand has 274 places, 545 transitions, 8977 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:49:34,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 577 transitions, 10304 flow [2024-06-14 11:49:36,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 577 transitions, 10052 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:36,452 INFO L231 Difference]: Finished difference. Result has 276 places, 556 transitions, 8963 flow [2024-06-14 11:49:36,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8725, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8963, PETRI_PLACES=276, PETRI_TRANSITIONS=556} [2024-06-14 11:49:36,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 11:49:36,452 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 556 transitions, 8963 flow [2024-06-14 11:49:36,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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) [2024-06-14 11:49:36,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:36,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:36,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:49:36,453 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)] === [2024-06-14 11:49:36,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash -706816311, now seen corresponding path program 13 times [2024-06-14 11:49:36,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:36,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415644982] [2024-06-14 11:49:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:36,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:38,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415644982] [2024-06-14 11:49:38,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415644982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:38,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157162789] [2024-06-14 11:49:38,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:38,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:38,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:38,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:49:38,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 556 transitions, 8963 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:38,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:38,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:49:38,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand