./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:22:22,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:22:22,860 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:22:22,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:22:22,866 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:22:22,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:22:22,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:22:22,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:22:22,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:22:22,893 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:22:22,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:22:22,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:22:22,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:22:22,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:22:22,895 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:22:22,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:22:22,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:22:22,895 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:22:22,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:22:22,897 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:22:22,897 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:22:22,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:22:22,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:22:22,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:22:22,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:22:22,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:22:22,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:22:22,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:22:22,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:22:22,899 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:22:22,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:22:22,900 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:22:23,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:22:23,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:22:23,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:22:23,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:22:23,167 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:22:23,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-14 12:22:24,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:22:24,247 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:22:24,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-14 12:22:24,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f87c7a/f5e62071292141b2bd2c3c6bbfb956d2/FLAG1ea504a4f [2024-06-14 12:22:24,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f87c7a/f5e62071292141b2bd2c3c6bbfb956d2 [2024-06-14 12:22:24,276 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:22:24,277 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:22:24,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml [2024-06-14 12:22:24,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:22:24,428 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:22:24,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:22:24,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:22:24,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:22:24,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:22:24" (1/2) ... [2024-06-14 12:22:24,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d19c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:22:24, skipping insertion in model container [2024-06-14 12:22:24,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:22:24" (1/2) ... [2024-06-14 12:22:24,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19489828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:22:24, skipping insertion in model container [2024-06-14 12:22:24,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:22:24" (2/2) ... [2024-06-14 12:22:24,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d19c42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:22:24, skipping insertion in model container [2024-06-14 12:22:24,437 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:22:24" (2/2) ... [2024-06-14 12:22:24,437 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:22:24,533 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:22:24,535 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-14 12:22:24,535 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-14 12:22:24,535 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-14 12:22:24,535 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:22:24,535 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-14 12:22:24,572 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:22:24,853 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:22:24,864 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:22:24,963 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:22:24,990 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:22:24,991 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:22:24 WrapperNode [2024-06-14 12:22:24,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:22:24,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:22:24,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:22:24,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:22:24,997 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,016 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,065 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-14 12:22:25,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:22:25,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:22:25,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:22:25,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:22:25,099 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,099 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,102 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,113 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:22:25,114 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,115 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,121 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,122 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,124 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,125 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,127 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:22:25,128 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:22:25,128 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:22:25,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:22:25,128 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 12:22:24" (1/1) ... [2024-06-14 12:22:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:22:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:22:25,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:22:25,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:22:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:22:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:22:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:22:25,210 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:22:25,210 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:22:25,211 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:22:25,211 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:22:25,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:22:25,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:22:25,212 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:22:25,328 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:22:25,330 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:22:25,646 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:22:25,647 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:22:25,777 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:22:25,777 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:22:25,778 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:22:25 BoogieIcfgContainer [2024-06-14 12:22:25,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:22:25,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:22:25,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:22:25,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:22:25,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:22:24" (1/4) ... [2024-06-14 12:22:25,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7ad1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:22:25, skipping insertion in model container [2024-06-14 12:22:25,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:22:24" (2/4) ... [2024-06-14 12:22:25,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7ad1f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:22:25, skipping insertion in model container [2024-06-14 12:22:25,784 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 12:22:24" (3/4) ... [2024-06-14 12:22:25,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f7ad1f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:22:25, skipping insertion in model container [2024-06-14 12:22:25,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:22:25" (4/4) ... [2024-06-14 12:22:25,786 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_pso.opt_tso.opt.i [2024-06-14 12:22:25,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:22:25,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:22:25,799 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:22:25,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:22:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:22:25,890 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:22:25,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:22:25,891 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 65 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:22:25,892 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:22:25,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:22:25,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:22:25,906 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;@765757c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:22:25,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:22:25,909 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:22:25,909 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:22:25,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:22:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:22:25,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:25,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1632138003, now seen corresponding path program 1 times [2024-06-14 12:22:25,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:25,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423871039] [2024-06-14 12:22:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:27,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423871039] [2024-06-14 12:22:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423871039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:27,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:27,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:22:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532321086] [2024-06-14 12:22:27,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:27,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:22:27,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:22:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:22:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-14 12:22:27,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:27,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:27,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-14 12:22:27,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:27,394 INFO L124 PetriNetUnfolderBase]: 869/1439 cut-off events. [2024-06-14 12:22:27,395 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 12:22:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2819 conditions, 1439 events. 869/1439 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7341 event pairs, 566 based on Foata normal form. 1/1386 useless extension candidates. Maximal degree in co-relation 2804. Up to 1315 conditions per place. [2024-06-14 12:22:27,408 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:22:27,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-14 12:22:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:22:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:22:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-14 12:22:27,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-14 12:22:27,419 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-14 12:22:27,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-14 12:22:27,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:27,423 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:22:27,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:22:27,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:22:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:22:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:27,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:27,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:22:27,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -821543540, now seen corresponding path program 1 times [2024-06-14 12:22:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042902917] [2024-06-14 12:22:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:28,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042902917] [2024-06-14 12:22:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042902917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:28,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:28,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:22:28,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918796221] [2024-06-14 12:22:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:22:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:22:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:22:28,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 12:22:28,245 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 12:22:28,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:28,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 12:22:28,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:28,454 INFO L124 PetriNetUnfolderBase]: 996/1590 cut-off events. [2024-06-14 12:22:28,455 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-14 12:22:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1590 events. 996/1590 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8017 event pairs, 519 based on Foata normal form. 3/1570 useless extension candidates. Maximal degree in co-relation 3592. Up to 1484 conditions per place. [2024-06-14 12:22:28,462 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:22:28,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-14 12:22:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:22:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:22:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 12:22:28,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-14 12:22:28,464 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-14 12:22:28,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-14 12:22:28,465 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 12:22:28,466 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:22:28,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:22:28,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:22:28,467 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:22:28,467 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 12:22:28,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:28,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:22:28,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1879442065, now seen corresponding path program 1 times [2024-06-14 12:22:28,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:28,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409254141] [2024-06-14 12:22:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:28,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:29,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:29,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409254141] [2024-06-14 12:22:29,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409254141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:29,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:29,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:22:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123160762] [2024-06-14 12:22:29,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:29,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:22:29,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:22:29,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:22:29,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:29,638 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 12:22:29,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:29,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:29,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:29,934 INFO L124 PetriNetUnfolderBase]: 1265/1984 cut-off events. [2024-06-14 12:22:29,935 INFO L125 PetriNetUnfolderBase]: For 1076/1076 co-relation queries the response was YES. [2024-06-14 12:22:29,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 1984 events. 1265/1984 cut-off events. For 1076/1076 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9784 event pairs, 445 based on Foata normal form. 6/1959 useless extension candidates. Maximal degree in co-relation 4966. Up to 1828 conditions per place. [2024-06-14 12:22:29,943 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-14 12:22:29,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 356 flow [2024-06-14 12:22:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:29,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 12:22:29,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-14 12:22:29,945 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 139 transitions. [2024-06-14 12:22:29,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 356 flow [2024-06-14 12:22:29,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:22:29,947 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 12:22:29,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 12:22:29,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 12:22:29,948 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 12:22:29,948 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 12:22:29,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:29,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:22:29,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:29,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1919090944, now seen corresponding path program 1 times [2024-06-14 12:22:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764544392] [2024-06-14 12:22:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:30,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:30,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764544392] [2024-06-14 12:22:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764544392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:30,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:30,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:22:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798488008] [2024-06-14 12:22:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:30,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:22:30,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:22:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:22:30,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:30,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:30,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:30,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:30,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:30,971 INFO L124 PetriNetUnfolderBase]: 1085/1811 cut-off events. [2024-06-14 12:22:30,971 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-14 12:22:30,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 1811 events. 1085/1811 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9338 event pairs, 442 based on Foata normal form. 4/1807 useless extension candidates. Maximal degree in co-relation 4850. Up to 1611 conditions per place. [2024-06-14 12:22:30,981 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 43 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-14 12:22:30,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 342 flow [2024-06-14 12:22:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:22:30,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 12:22:30,984 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:22:30,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 342 flow [2024-06-14 12:22:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 313 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:30,989 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 218 flow [2024-06-14 12:22:30,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-14 12:22:30,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 12:22:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 218 flow [2024-06-14 12:22:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:30,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:30,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:22:30,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:30,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1425082109, now seen corresponding path program 1 times [2024-06-14 12:22:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:30,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581651918] [2024-06-14 12:22:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581651918] [2024-06-14 12:22:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581651918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:31,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011991345] [2024-06-14 12:22:31,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:31,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:31,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:31,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:31,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:31,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:32,260 INFO L124 PetriNetUnfolderBase]: 1277/2018 cut-off events. [2024-06-14 12:22:32,261 INFO L125 PetriNetUnfolderBase]: For 3037/3037 co-relation queries the response was YES. [2024-06-14 12:22:32,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 2018 events. 1277/2018 cut-off events. For 3037/3037 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9927 event pairs, 487 based on Foata normal form. 4/2011 useless extension candidates. Maximal degree in co-relation 5986. Up to 1826 conditions per place. [2024-06-14 12:22:32,271 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 54 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-14 12:22:32,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 468 flow [2024-06-14 12:22:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:32,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:32,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 12:22:32,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:22:32,273 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 218 flow. Second operand 6 states and 129 transitions. [2024-06-14 12:22:32,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 468 flow [2024-06-14 12:22:32,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:32,279 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 280 flow [2024-06-14 12:22:32,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-14 12:22:32,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:22:32,282 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 280 flow [2024-06-14 12:22:32,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:32,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:32,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:32,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:22:32,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash -760707647, now seen corresponding path program 2 times [2024-06-14 12:22:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184643437] [2024-06-14 12:22:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184643437] [2024-06-14 12:22:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184643437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:32,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678608794] [2024-06-14 12:22:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:32,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:33,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:33,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:33,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:33,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:33,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:33,498 INFO L124 PetriNetUnfolderBase]: 1267/2006 cut-off events. [2024-06-14 12:22:33,498 INFO L125 PetriNetUnfolderBase]: For 4382/4386 co-relation queries the response was YES. [2024-06-14 12:22:33,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6448 conditions, 2006 events. 1267/2006 cut-off events. For 4382/4386 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9883 event pairs, 485 based on Foata normal form. 8/2004 useless extension candidates. Maximal degree in co-relation 6425. Up to 1818 conditions per place. [2024-06-14 12:22:33,512 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-14 12:22:33,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 456 flow [2024-06-14 12:22:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 12:22:33,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:22:33,513 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 280 flow. Second operand 6 states and 123 transitions. [2024-06-14 12:22:33,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 456 flow [2024-06-14 12:22:33,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 425 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 12:22:33,518 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 289 flow [2024-06-14 12:22:33,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-06-14 12:22:33,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:22:33,519 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 289 flow [2024-06-14 12:22:33,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:33,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:33,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:22:33,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:33,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash 206911127, now seen corresponding path program 1 times [2024-06-14 12:22:33,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:33,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548100014] [2024-06-14 12:22:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:34,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548100014] [2024-06-14 12:22:34,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548100014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:34,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:34,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:34,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575632645] [2024-06-14 12:22:34,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:34,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:34,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:34,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:34,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:34,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:34,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:34,906 INFO L124 PetriNetUnfolderBase]: 1289/2044 cut-off events. [2024-06-14 12:22:34,906 INFO L125 PetriNetUnfolderBase]: For 5260/5260 co-relation queries the response was YES. [2024-06-14 12:22:34,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 2044 events. 1289/2044 cut-off events. For 5260/5260 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10197 event pairs, 513 based on Foata normal form. 4/2034 useless extension candidates. Maximal degree in co-relation 6667. Up to 1876 conditions per place. [2024-06-14 12:22:34,918 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 62 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-14 12:22:34,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 533 flow [2024-06-14 12:22:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:22:34,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-14 12:22:34,919 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 289 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:22:34,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 533 flow [2024-06-14 12:22:34,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 487 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:34,925 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 309 flow [2024-06-14 12:22:34,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 12:22:34,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 12:22:34,926 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 309 flow [2024-06-14 12:22:34,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:34,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:34,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:34,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:22:34,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:34,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1239447737, now seen corresponding path program 2 times [2024-06-14 12:22:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:34,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036785991] [2024-06-14 12:22:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:34,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036785991] [2024-06-14 12:22:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036785991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154580488] [2024-06-14 12:22:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:35,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:35,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:35,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:35,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:35,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:35,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:36,264 INFO L124 PetriNetUnfolderBase]: 1311/2090 cut-off events. [2024-06-14 12:22:36,265 INFO L125 PetriNetUnfolderBase]: For 7102/7102 co-relation queries the response was YES. [2024-06-14 12:22:36,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7259 conditions, 2090 events. 1311/2090 cut-off events. For 7102/7102 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10468 event pairs, 445 based on Foata normal form. 4/2081 useless extension candidates. Maximal degree in co-relation 7234. Up to 1797 conditions per place. [2024-06-14 12:22:36,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 27 changer transitions 0/91 dead transitions. [2024-06-14 12:22:36,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 631 flow [2024-06-14 12:22:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 12:22:36,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2024-06-14 12:22:36,287 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 309 flow. Second operand 7 states and 150 transitions. [2024-06-14 12:22:36,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 631 flow [2024-06-14 12:22:36,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 589 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:36,292 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 391 flow [2024-06-14 12:22:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-14 12:22:36,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:22:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 391 flow [2024-06-14 12:22:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:36,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:36,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:36,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:22:36,294 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:36,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2107099049, now seen corresponding path program 3 times [2024-06-14 12:22:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75484370] [2024-06-14 12:22:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:36,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:36,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75484370] [2024-06-14 12:22:36,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75484370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:36,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:36,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:36,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154153772] [2024-06-14 12:22:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:36,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:36,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:36,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:36,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:37,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:37,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:37,608 INFO L124 PetriNetUnfolderBase]: 1301/2075 cut-off events. [2024-06-14 12:22:37,608 INFO L125 PetriNetUnfolderBase]: For 9351/9353 co-relation queries the response was YES. [2024-06-14 12:22:37,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 2075 events. 1301/2075 cut-off events. For 9351/9353 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10329 event pairs, 454 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 7635. Up to 1789 conditions per place. [2024-06-14 12:22:37,619 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 26 changer transitions 0/86 dead transitions. [2024-06-14 12:22:37,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 607 flow [2024-06-14 12:22:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 12:22:37,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47840531561461797 [2024-06-14 12:22:37,622 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 391 flow. Second operand 7 states and 144 transitions. [2024-06-14 12:22:37,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 607 flow [2024-06-14 12:22:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 554 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:37,631 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 398 flow [2024-06-14 12:22:37,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-14 12:22:37,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-14 12:22:37,631 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 398 flow [2024-06-14 12:22:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:37,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:37,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:22:37,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:37,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1246123091, now seen corresponding path program 1 times [2024-06-14 12:22:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867460813] [2024-06-14 12:22:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:37,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:38,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:38,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867460813] [2024-06-14 12:22:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867460813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:38,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:38,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:22:38,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711997317] [2024-06-14 12:22:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:38,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:22:38,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:22:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:22:38,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:38,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 398 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:38,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:38,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:38,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:39,281 INFO L124 PetriNetUnfolderBase]: 1123/1875 cut-off events. [2024-06-14 12:22:39,281 INFO L125 PetriNetUnfolderBase]: For 8972/8972 co-relation queries the response was YES. [2024-06-14 12:22:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6953 conditions, 1875 events. 1123/1875 cut-off events. For 8972/8972 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9653 event pairs, 386 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 6925. Up to 1649 conditions per place. [2024-06-14 12:22:39,294 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-14 12:22:39,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 649 flow [2024-06-14 12:22:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:22:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:22:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:22:39,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:22:39,296 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 398 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:22:39,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 649 flow [2024-06-14 12:22:39,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 575 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:39,305 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 410 flow [2024-06-14 12:22:39,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 12:22:39,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 12:22:39,307 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 410 flow [2024-06-14 12:22:39,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:39,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:39,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:39,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:22:39,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1781372754, now seen corresponding path program 1 times [2024-06-14 12:22:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784589364] [2024-06-14 12:22:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:39,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:39,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784589364] [2024-06-14 12:22:39,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784589364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:39,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:22:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865055987] [2024-06-14 12:22:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:22:39,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:39,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:22:39,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:22:40,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 12:22:40,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:40,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:40,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 12:22:40,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:40,304 INFO L124 PetriNetUnfolderBase]: 1015/1751 cut-off events. [2024-06-14 12:22:40,304 INFO L125 PetriNetUnfolderBase]: For 10269/10271 co-relation queries the response was YES. [2024-06-14 12:22:40,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 1751 events. 1015/1751 cut-off events. For 10269/10271 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9351 event pairs, 395 based on Foata normal form. 3/1728 useless extension candidates. Maximal degree in co-relation 6795. Up to 1528 conditions per place. [2024-06-14 12:22:40,314 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 59 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-14 12:22:40,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 582 flow [2024-06-14 12:22:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:22:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:22:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-14 12:22:40,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 12:22:40,315 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 410 flow. Second operand 5 states and 105 transitions. [2024-06-14 12:22:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 582 flow [2024-06-14 12:22:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 79 transitions, 541 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:40,324 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 417 flow [2024-06-14 12:22:40,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-14 12:22:40,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 12:22:40,325 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 417 flow [2024-06-14 12:22:40,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:40,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:40,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:40,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:22:40,326 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:40,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash -612017814, now seen corresponding path program 1 times [2024-06-14 12:22:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:40,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668086167] [2024-06-14 12:22:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:41,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668086167] [2024-06-14 12:22:41,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668086167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:41,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:41,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435080910] [2024-06-14 12:22:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:41,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:41,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:41,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:41,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:41,474 INFO L124 PetriNetUnfolderBase]: 1167/1932 cut-off events. [2024-06-14 12:22:41,474 INFO L125 PetriNetUnfolderBase]: For 13965/13967 co-relation queries the response was YES. [2024-06-14 12:22:41,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 1932 events. 1167/1932 cut-off events. For 13965/13967 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10040 event pairs, 467 based on Foata normal form. 3/1929 useless extension candidates. Maximal degree in co-relation 8001. Up to 1751 conditions per place. [2024-06-14 12:22:41,485 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 61 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-06-14 12:22:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 605 flow [2024-06-14 12:22:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:22:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:22:41,487 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 417 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:22:41,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 605 flow [2024-06-14 12:22:41,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 579 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:41,495 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 449 flow [2024-06-14 12:22:41,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-14 12:22:41,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 12:22:41,495 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 449 flow [2024-06-14 12:22:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:41,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:41,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:22:41,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:41,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1701548530, now seen corresponding path program 1 times [2024-06-14 12:22:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361279743] [2024-06-14 12:22:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:42,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:42,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361279743] [2024-06-14 12:22:42,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361279743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:42,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:42,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:42,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729197037] [2024-06-14 12:22:42,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:42,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:42,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:42,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:42,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 449 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:42,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:42,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:42,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:43,123 INFO L124 PetriNetUnfolderBase]: 1511/2408 cut-off events. [2024-06-14 12:22:43,124 INFO L125 PetriNetUnfolderBase]: For 22817/22817 co-relation queries the response was YES. [2024-06-14 12:22:43,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 2408 events. 1511/2408 cut-off events. For 22817/22817 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12512 event pairs, 425 based on Foata normal form. 16/2423 useless extension candidates. Maximal degree in co-relation 10740. Up to 1921 conditions per place. [2024-06-14 12:22:43,136 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 95 selfloop transitions, 19 changer transitions 0/121 dead transitions. [2024-06-14 12:22:43,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 895 flow [2024-06-14 12:22:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 12:22:43,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-14 12:22:43,138 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 449 flow. Second operand 9 states and 188 transitions. [2024-06-14 12:22:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 895 flow [2024-06-14 12:22:43,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 859 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:43,149 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 495 flow [2024-06-14 12:22:43,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=495, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-14 12:22:43,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 12:22:43,149 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 495 flow [2024-06-14 12:22:43,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:43,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:43,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:43,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:22:43,150 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:43,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1016838898, now seen corresponding path program 2 times [2024-06-14 12:22:43,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:43,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505060341] [2024-06-14 12:22:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:43,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505060341] [2024-06-14 12:22:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505060341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:44,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85630783] [2024-06-14 12:22:44,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:44,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:44,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:44,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:44,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:44,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:44,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:44,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:44,740 INFO L124 PetriNetUnfolderBase]: 1475/2353 cut-off events. [2024-06-14 12:22:44,740 INFO L125 PetriNetUnfolderBase]: For 24468/24468 co-relation queries the response was YES. [2024-06-14 12:22:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10652 conditions, 2353 events. 1475/2353 cut-off events. For 24468/24468 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12143 event pairs, 529 based on Foata normal form. 20/2372 useless extension candidates. Maximal degree in co-relation 10619. Up to 2033 conditions per place. [2024-06-14 12:22:44,753 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 88 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-06-14 12:22:44,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 111 transitions, 809 flow [2024-06-14 12:22:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:22:44,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 12:22:44,755 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 495 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:22:44,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 111 transitions, 809 flow [2024-06-14 12:22:44,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 111 transitions, 777 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:44,768 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 502 flow [2024-06-14 12:22:44,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2024-06-14 12:22:44,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:22:44,769 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 502 flow [2024-06-14 12:22:44,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:44,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:44,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:22:44,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:44,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1761727544, now seen corresponding path program 3 times [2024-06-14 12:22:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404124139] [2024-06-14 12:22:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:44,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404124139] [2024-06-14 12:22:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404124139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:45,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795226963] [2024-06-14 12:22:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:45,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:45,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:45,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 502 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:45,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:45,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:45,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:46,308 INFO L124 PetriNetUnfolderBase]: 1550/2476 cut-off events. [2024-06-14 12:22:46,308 INFO L125 PetriNetUnfolderBase]: For 27830/27830 co-relation queries the response was YES. [2024-06-14 12:22:46,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11358 conditions, 2476 events. 1550/2476 cut-off events. For 27830/27830 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12931 event pairs, 489 based on Foata normal form. 20/2494 useless extension candidates. Maximal degree in co-relation 11323. Up to 2053 conditions per place. [2024-06-14 12:22:46,319 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-14 12:22:46,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 111 transitions, 834 flow [2024-06-14 12:22:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 12:22:46,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-14 12:22:46,321 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 502 flow. Second operand 8 states and 169 transitions. [2024-06-14 12:22:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 111 transitions, 834 flow [2024-06-14 12:22:46,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 797 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:22:46,336 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 554 flow [2024-06-14 12:22:46,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=554, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-06-14 12:22:46,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 12:22:46,337 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 554 flow [2024-06-14 12:22:46,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:46,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:46,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:46,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:22:46,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:46,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:46,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1761912242, now seen corresponding path program 1 times [2024-06-14 12:22:46,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:46,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931957091] [2024-06-14 12:22:46,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:46,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931957091] [2024-06-14 12:22:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931957091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:47,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559862685] [2024-06-14 12:22:47,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:47,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:47,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 554 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:47,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:47,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:48,042 INFO L124 PetriNetUnfolderBase]: 1567/2508 cut-off events. [2024-06-14 12:22:48,042 INFO L125 PetriNetUnfolderBase]: For 30154/30154 co-relation queries the response was YES. [2024-06-14 12:22:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11769 conditions, 2508 events. 1567/2508 cut-off events. For 30154/30154 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13209 event pairs, 504 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 11733. Up to 2261 conditions per place. [2024-06-14 12:22:48,055 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-14 12:22:48,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 879 flow [2024-06-14 12:22:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:22:48,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-14 12:22:48,057 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 554 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:22:48,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 879 flow [2024-06-14 12:22:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 810 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:48,076 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 597 flow [2024-06-14 12:22:48,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2024-06-14 12:22:48,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 12:22:48,077 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 597 flow [2024-06-14 12:22:48,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:48,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:48,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:22:48,077 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:48,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:48,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1804123087, now seen corresponding path program 1 times [2024-06-14 12:22:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110340888] [2024-06-14 12:22:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110340888] [2024-06-14 12:22:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110340888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:48,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:48,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924806293] [2024-06-14 12:22:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:48,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:48,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 597 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:48,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:49,266 INFO L124 PetriNetUnfolderBase]: 1491/2423 cut-off events. [2024-06-14 12:22:49,266 INFO L125 PetriNetUnfolderBase]: For 32489/32489 co-relation queries the response was YES. [2024-06-14 12:22:49,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11827 conditions, 2423 events. 1491/2423 cut-off events. For 32489/32489 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12952 event pairs, 512 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 11789. Up to 2181 conditions per place. [2024-06-14 12:22:49,278 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 73 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-14 12:22:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 833 flow [2024-06-14 12:22:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 12:22:49,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:22:49,279 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 597 flow. Second operand 6 states and 123 transitions. [2024-06-14 12:22:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 833 flow [2024-06-14 12:22:49,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 766 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:49,298 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 595 flow [2024-06-14 12:22:49,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-06-14 12:22:49,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 12:22:49,298 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 595 flow [2024-06-14 12:22:49,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:49,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:49,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:22:49,299 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 12:22:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash 186426424, now seen corresponding path program 4 times [2024-06-14 12:22:49,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:49,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614431499] [2024-06-14 12:22:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:49,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:50,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614431499] [2024-06-14 12:22:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614431499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:50,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:50,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138495659] [2024-06-14 12:22:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:50,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:50,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 595 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:50,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:50,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:50,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:50,831 INFO L124 PetriNetUnfolderBase]: 1632/2595 cut-off events. [2024-06-14 12:22:50,832 INFO L125 PetriNetUnfolderBase]: For 37772/37774 co-relation queries the response was YES. [2024-06-14 12:22:50,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12824 conditions, 2595 events. 1632/2595 cut-off events. For 37772/37774 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13517 event pairs, 506 based on Foata normal form. 20/2613 useless extension candidates. Maximal degree in co-relation 12785. Up to 2171 conditions per place. [2024-06-14 12:22:50,844 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 30 changer transitions 0/118 dead transitions. [2024-06-14 12:22:50,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 949 flow [2024-06-14 12:22:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:22:50,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 12:22:50,846 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 595 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:22:50,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 949 flow [2024-06-14 12:22:50,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 908 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:50,864 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 647 flow [2024-06-14 12:22:50,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=647, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2024-06-14 12:22:50,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-14 12:22:50,864 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 647 flow [2024-06-14 12:22:50,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:50,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:50,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:50,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:22:50,865 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:50,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -780109070, now seen corresponding path program 2 times [2024-06-14 12:22:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:50,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749026567] [2024-06-14 12:22:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:50,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:51,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:51,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749026567] [2024-06-14 12:22:51,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749026567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:51,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:51,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:51,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329096862] [2024-06-14 12:22:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:51,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:51,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:51,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:51,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:51,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:51,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:51,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:52,578 INFO L124 PetriNetUnfolderBase]: 1660/2646 cut-off events. [2024-06-14 12:22:52,578 INFO L125 PetriNetUnfolderBase]: For 40056/40060 co-relation queries the response was YES. [2024-06-14 12:22:52,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13354 conditions, 2646 events. 1660/2646 cut-off events. For 40056/40060 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13892 event pairs, 534 based on Foata normal form. 8/2653 useless extension candidates. Maximal degree in co-relation 13314. Up to 2391 conditions per place. [2024-06-14 12:22:52,589 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-14 12:22:52,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 119 transitions, 1013 flow [2024-06-14 12:22:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:22:52,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:22:52,596 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 647 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:22:52,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 119 transitions, 1013 flow [2024-06-14 12:22:52,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 119 transitions, 934 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:52,618 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 729 flow [2024-06-14 12:22:52,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=729, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-14 12:22:52,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-14 12:22:52,619 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 729 flow [2024-06-14 12:22:52,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:52,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:52,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:52,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:22:52,619 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash -771538190, now seen corresponding path program 3 times [2024-06-14 12:22:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014098919] [2024-06-14 12:22:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:53,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:53,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014098919] [2024-06-14 12:22:53,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014098919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:53,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:53,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:53,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32115739] [2024-06-14 12:22:53,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:53,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:53,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:53,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 729 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:53,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:53,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:53,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:54,365 INFO L124 PetriNetUnfolderBase]: 1677/2683 cut-off events. [2024-06-14 12:22:54,365 INFO L125 PetriNetUnfolderBase]: For 43712/43716 co-relation queries the response was YES. [2024-06-14 12:22:54,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13870 conditions, 2683 events. 1677/2683 cut-off events. For 43712/43716 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14180 event pairs, 470 based on Foata normal form. 8/2690 useless extension candidates. Maximal degree in co-relation 13828. Up to 2335 conditions per place. [2024-06-14 12:22:54,379 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-14 12:22:54,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 126 transitions, 1177 flow [2024-06-14 12:22:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:22:54,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-14 12:22:54,380 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 729 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:22:54,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 126 transitions, 1177 flow [2024-06-14 12:22:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 126 transitions, 1116 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:22:54,403 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 823 flow [2024-06-14 12:22:54,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=823, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-06-14 12:22:54,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:22:54,403 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 823 flow [2024-06-14 12:22:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:54,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:54,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:22:54,404 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:54,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1008010220, now seen corresponding path program 4 times [2024-06-14 12:22:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161905473] [2024-06-14 12:22:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161905473] [2024-06-14 12:22:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161905473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532452262] [2024-06-14 12:22:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:22:55,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:55,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:55,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:22:55,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:56,047 INFO L124 PetriNetUnfolderBase]: 1669/2671 cut-off events. [2024-06-14 12:22:56,048 INFO L125 PetriNetUnfolderBase]: For 46397/46401 co-relation queries the response was YES. [2024-06-14 12:22:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13771 conditions, 2671 events. 1669/2671 cut-off events. For 46397/46401 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14069 event pairs, 542 based on Foata normal form. 8/2678 useless extension candidates. Maximal degree in co-relation 13728. Up to 2406 conditions per place. [2024-06-14 12:22:56,061 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 88 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2024-06-14 12:22:56,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 123 transitions, 1117 flow [2024-06-14 12:22:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:22:56,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 12:22:56,063 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 823 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:22:56,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 123 transitions, 1117 flow [2024-06-14 12:22:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1031 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:56,098 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 800 flow [2024-06-14 12:22:56,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-14 12:22:56,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 12:22:56,099 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 800 flow [2024-06-14 12:22:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:56,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:56,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:56,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:22:56,100 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:56,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash -878409457, now seen corresponding path program 2 times [2024-06-14 12:22:56,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:56,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669575397] [2024-06-14 12:22:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:56,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669575397] [2024-06-14 12:22:56,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669575397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:56,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:56,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:56,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253890777] [2024-06-14 12:22:56,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:56,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:56,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:56,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:56,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 800 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:56,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:56,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:57,243 INFO L124 PetriNetUnfolderBase]: 1551/2529 cut-off events. [2024-06-14 12:22:57,243 INFO L125 PetriNetUnfolderBase]: For 49112/49112 co-relation queries the response was YES. [2024-06-14 12:22:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13233 conditions, 2529 events. 1551/2529 cut-off events. For 49112/49112 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13700 event pairs, 526 based on Foata normal form. 2/2518 useless extension candidates. Maximal degree in co-relation 13188. Up to 2266 conditions per place. [2024-06-14 12:22:57,258 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 75 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-14 12:22:57,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1040 flow [2024-06-14 12:22:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:22:57,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 12:22:57,259 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 800 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:22:57,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1040 flow [2024-06-14 12:22:57,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 943 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:22:57,286 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 781 flow [2024-06-14 12:22:57,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=781, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-06-14 12:22:57,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 12:22:57,287 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 781 flow [2024-06-14 12:22:57,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:57,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:57,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:22:57,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1798403215, now seen corresponding path program 1 times [2024-06-14 12:22:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797444038] [2024-06-14 12:22:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797444038] [2024-06-14 12:22:57,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797444038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:57,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:57,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:57,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73352912] [2024-06-14 12:22:57,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:57,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:57,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:58,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:58,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 781 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:58,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:58,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:58,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:58,401 INFO L124 PetriNetUnfolderBase]: 1503/2482 cut-off events. [2024-06-14 12:22:58,401 INFO L125 PetriNetUnfolderBase]: For 45553/45553 co-relation queries the response was YES. [2024-06-14 12:22:58,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12868 conditions, 2482 events. 1503/2482 cut-off events. For 45553/45553 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13456 event pairs, 464 based on Foata normal form. 2/2483 useless extension candidates. Maximal degree in co-relation 12824. Up to 2248 conditions per place. [2024-06-14 12:22:58,414 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2024-06-14 12:22:58,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 117 transitions, 1061 flow [2024-06-14 12:22:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:22:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 12:22:58,415 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 781 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:22:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 117 transitions, 1061 flow [2024-06-14 12:22:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 117 transitions, 1005 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:58,450 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 791 flow [2024-06-14 12:22:58,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=791, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2024-06-14 12:22:58,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 12:22:58,450 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 791 flow [2024-06-14 12:22:58,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:58,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:58,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:58,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:22:58,451 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:58,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash -878403505, now seen corresponding path program 2 times [2024-06-14 12:22:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589178159] [2024-06-14 12:22:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:58,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:59,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589178159] [2024-06-14 12:22:59,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589178159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:22:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382369236] [2024-06-14 12:22:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:59,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:22:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:22:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:22:59,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:22:59,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 791 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:59,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:59,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:22:59,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:59,572 INFO L124 PetriNetUnfolderBase]: 1505/2488 cut-off events. [2024-06-14 12:22:59,572 INFO L125 PetriNetUnfolderBase]: For 49184/49186 co-relation queries the response was YES. [2024-06-14 12:22:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13250 conditions, 2488 events. 1505/2488 cut-off events. For 49184/49186 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13490 event pairs, 468 based on Foata normal form. 4/2491 useless extension candidates. Maximal degree in co-relation 13205. Up to 2242 conditions per place. [2024-06-14 12:22:59,587 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-14 12:22:59,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 118 transitions, 1075 flow [2024-06-14 12:22:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:22:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:22:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 12:22:59,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-14 12:22:59,588 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 791 flow. Second operand 6 states and 121 transitions. [2024-06-14 12:22:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 118 transitions, 1075 flow [2024-06-14 12:22:59,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 1031 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:59,624 INFO L231 Difference]: Finished difference. Result has 105 places, 108 transitions, 829 flow [2024-06-14 12:22:59,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=829, PETRI_PLACES=105, PETRI_TRANSITIONS=108} [2024-06-14 12:22:59,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 12:22:59,625 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 108 transitions, 829 flow [2024-06-14 12:22:59,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:59,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:59,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:59,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:22:59,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:59,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash -878395569, now seen corresponding path program 1 times [2024-06-14 12:22:59,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128150226] [2024-06-14 12:22:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:59,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:00,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128150226] [2024-06-14 12:23:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128150226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:00,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370267002] [2024-06-14 12:23:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:00,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:23:00,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 108 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:00,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:00,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:23:00,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:00,955 INFO L124 PetriNetUnfolderBase]: 1488/2479 cut-off events. [2024-06-14 12:23:00,956 INFO L125 PetriNetUnfolderBase]: For 53137/53137 co-relation queries the response was YES. [2024-06-14 12:23:00,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 2479 events. 1488/2479 cut-off events. For 53137/53137 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13705 event pairs, 498 based on Foata normal form. 1/2470 useless extension candidates. Maximal degree in co-relation 13491. Up to 2224 conditions per place. [2024-06-14 12:23:00,971 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 88 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-06-14 12:23:00,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 120 transitions, 1091 flow [2024-06-14 12:23:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:00,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:23:00,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:00,973 INFO L175 Difference]: Start difference. First operand has 105 places, 108 transitions, 829 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:23:00,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 120 transitions, 1091 flow [2024-06-14 12:23:01,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1031 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:01,005 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 845 flow [2024-06-14 12:23:01,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-14 12:23:01,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 12:23:01,005 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 845 flow [2024-06-14 12:23:01,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:01,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:01,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:23:01,006 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:01,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:01,006 INFO L85 PathProgramCache]: Analyzing trace with hash 742020906, now seen corresponding path program 1 times [2024-06-14 12:23:01,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:01,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477321972] [2024-06-14 12:23:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:01,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:02,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:02,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477321972] [2024-06-14 12:23:02,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477321972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:02,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:02,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:02,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643349098] [2024-06-14 12:23:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:02,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:02,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 845 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:02,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:02,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:02,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:02,963 INFO L124 PetriNetUnfolderBase]: 1792/2907 cut-off events. [2024-06-14 12:23:02,964 INFO L125 PetriNetUnfolderBase]: For 70154/70154 co-relation queries the response was YES. [2024-06-14 12:23:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16397 conditions, 2907 events. 1792/2907 cut-off events. For 70154/70154 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15898 event pairs, 527 based on Foata normal form. 12/2917 useless extension candidates. Maximal degree in co-relation 16350. Up to 2283 conditions per place. [2024-06-14 12:23:02,981 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 43 changer transitions 0/156 dead transitions. [2024-06-14 12:23:02,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 156 transitions, 1357 flow [2024-06-14 12:23:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:23:02,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-14 12:23:02,982 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 845 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:23:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 156 transitions, 1357 flow [2024-06-14 12:23:03,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 156 transitions, 1303 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:03,032 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 997 flow [2024-06-14 12:23:03,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=997, PETRI_PLACES=114, PETRI_TRANSITIONS=119} [2024-06-14 12:23:03,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 12:23:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 997 flow [2024-06-14 12:23:03,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:03,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:03,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:23:03,034 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:03,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash -891033951, now seen corresponding path program 1 times [2024-06-14 12:23:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577799407] [2024-06-14 12:23:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577799407] [2024-06-14 12:23:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577799407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:03,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:03,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:03,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867939859] [2024-06-14 12:23:03,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:03,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:03,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:03,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:03,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:03,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 119 transitions, 997 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:03,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:03,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:04,441 INFO L124 PetriNetUnfolderBase]: 1756/2867 cut-off events. [2024-06-14 12:23:04,442 INFO L125 PetriNetUnfolderBase]: For 73919/73919 co-relation queries the response was YES. [2024-06-14 12:23:04,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16824 conditions, 2867 events. 1756/2867 cut-off events. For 73919/73919 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15832 event pairs, 555 based on Foata normal form. 2/2852 useless extension candidates. Maximal degree in co-relation 16774. Up to 2635 conditions per place. [2024-06-14 12:23:04,460 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 104 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-06-14 12:23:04,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 137 transitions, 1313 flow [2024-06-14 12:23:04,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:23:04,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:04,461 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 997 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:23:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 137 transitions, 1313 flow [2024-06-14 12:23:04,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1235 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:04,515 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 999 flow [2024-06-14 12:23:04,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=999, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-06-14 12:23:04,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 12:23:04,515 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 999 flow [2024-06-14 12:23:04,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:04,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:04,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:04,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:23:04,516 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:04,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1842924644, now seen corresponding path program 2 times [2024-06-14 12:23:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:04,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501621012] [2024-06-14 12:23:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:04,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501621012] [2024-06-14 12:23:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501621012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:05,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259821759] [2024-06-14 12:23:05,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:05,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:05,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 999 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:05,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:05,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:05,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:06,490 INFO L124 PetriNetUnfolderBase]: 1920/3131 cut-off events. [2024-06-14 12:23:06,490 INFO L125 PetriNetUnfolderBase]: For 81928/81928 co-relation queries the response was YES. [2024-06-14 12:23:06,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18303 conditions, 3131 events. 1920/3131 cut-off events. For 81928/81928 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17462 event pairs, 521 based on Foata normal form. 12/3142 useless extension candidates. Maximal degree in co-relation 18252. Up to 2576 conditions per place. [2024-06-14 12:23:06,510 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 107 selfloop transitions, 51 changer transitions 0/166 dead transitions. [2024-06-14 12:23:06,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1533 flow [2024-06-14 12:23:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:23:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:23:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 12:23:06,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 12:23:06,511 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 999 flow. Second operand 10 states and 198 transitions. [2024-06-14 12:23:06,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1533 flow [2024-06-14 12:23:06,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 166 transitions, 1473 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:06,582 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1178 flow [2024-06-14 12:23:06,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1178, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-14 12:23:06,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:23:06,583 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1178 flow [2024-06-14 12:23:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:06,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:06,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:06,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:23:06,583 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:06,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1783215484, now seen corresponding path program 3 times [2024-06-14 12:23:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:06,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024149099] [2024-06-14 12:23:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:07,675 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 12:23:07,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024149099] [2024-06-14 12:23:07,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024149099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:07,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:07,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754705991] [2024-06-14 12:23:07,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:07,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:07,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:07,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:07,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1178 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:08,431 INFO L124 PetriNetUnfolderBase]: 2002/3292 cut-off events. [2024-06-14 12:23:08,431 INFO L125 PetriNetUnfolderBase]: For 90549/90551 co-relation queries the response was YES. [2024-06-14 12:23:08,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19603 conditions, 3292 events. 2002/3292 cut-off events. For 90549/90551 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18913 event pairs, 409 based on Foata normal form. 12/3302 useless extension candidates. Maximal degree in co-relation 19548. Up to 2132 conditions per place. [2024-06-14 12:23:08,450 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 102 selfloop transitions, 59 changer transitions 0/169 dead transitions. [2024-06-14 12:23:08,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 1726 flow [2024-06-14 12:23:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:23:08,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-14 12:23:08,451 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1178 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:23:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 1726 flow [2024-06-14 12:23:08,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 169 transitions, 1659 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 12:23:08,511 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 1311 flow [2024-06-14 12:23:08,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1311, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-06-14 12:23:08,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:23:08,513 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 1311 flow [2024-06-14 12:23:08,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:08,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:08,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:23:08,513 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:08,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1183544220, now seen corresponding path program 4 times [2024-06-14 12:23:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:08,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719612638] [2024-06-14 12:23:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:08,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719612638] [2024-06-14 12:23:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719612638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872653594] [2024-06-14 12:23:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:09,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:09,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:09,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 1311 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:09,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:09,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:09,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:10,452 INFO L124 PetriNetUnfolderBase]: 1982/3260 cut-off events. [2024-06-14 12:23:10,453 INFO L125 PetriNetUnfolderBase]: For 91631/91633 co-relation queries the response was YES. [2024-06-14 12:23:10,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19218 conditions, 3260 events. 1982/3260 cut-off events. For 91631/91633 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18671 event pairs, 537 based on Foata normal form. 12/3270 useless extension candidates. Maximal degree in co-relation 19160. Up to 2686 conditions per place. [2024-06-14 12:23:10,473 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 47 changer transitions 0/166 dead transitions. [2024-06-14 12:23:10,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 166 transitions, 1699 flow [2024-06-14 12:23:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:23:10,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-14 12:23:10,474 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 1311 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:23:10,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 166 transitions, 1699 flow [2024-06-14 12:23:10,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1575 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:10,541 INFO L231 Difference]: Finished difference. Result has 135 places, 133 transitions, 1241 flow [2024-06-14 12:23:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1241, PETRI_PLACES=135, PETRI_TRANSITIONS=133} [2024-06-14 12:23:10,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 12:23:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 133 transitions, 1241 flow [2024-06-14 12:23:10,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:23:10,542 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1460472021, now seen corresponding path program 2 times [2024-06-14 12:23:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557764708] [2024-06-14 12:23:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:11,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557764708] [2024-06-14 12:23:11,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557764708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:11,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:11,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811250117] [2024-06-14 12:23:11,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:11,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:11,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:11,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:11,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 133 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:11,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:11,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:11,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:11,920 INFO L124 PetriNetUnfolderBase]: 1906/3148 cut-off events. [2024-06-14 12:23:11,920 INFO L125 PetriNetUnfolderBase]: For 91129/91135 co-relation queries the response was YES. [2024-06-14 12:23:11,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18646 conditions, 3148 events. 1906/3148 cut-off events. For 91129/91135 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18134 event pairs, 550 based on Foata normal form. 6/3128 useless extension candidates. Maximal degree in co-relation 18587. Up to 2883 conditions per place. [2024-06-14 12:23:11,940 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 103 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-14 12:23:11,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 149 transitions, 1671 flow [2024-06-14 12:23:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:23:11,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 12:23:11,941 INFO L175 Difference]: Start difference. First operand has 135 places, 133 transitions, 1241 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:23:11,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 149 transitions, 1671 flow [2024-06-14 12:23:12,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 149 transitions, 1506 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 12:23:12,019 INFO L231 Difference]: Finished difference. Result has 133 places, 139 transitions, 1228 flow [2024-06-14 12:23:12,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1228, PETRI_PLACES=133, PETRI_TRANSITIONS=139} [2024-06-14 12:23:12,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:23:12,020 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 139 transitions, 1228 flow [2024-06-14 12:23:12,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:12,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:12,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:23:12,020 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:12,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash 261023851, now seen corresponding path program 3 times [2024-06-14 12:23:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:12,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893579461] [2024-06-14 12:23:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893579461] [2024-06-14 12:23:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893579461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699231089] [2024-06-14 12:23:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:12,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:12,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:12,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:12,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 139 transitions, 1228 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:12,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:12,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:12,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:13,326 INFO L124 PetriNetUnfolderBase]: 1902/3141 cut-off events. [2024-06-14 12:23:13,326 INFO L125 PetriNetUnfolderBase]: For 94464/94470 co-relation queries the response was YES. [2024-06-14 12:23:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18606 conditions, 3141 events. 1902/3141 cut-off events. For 94464/94470 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18090 event pairs, 549 based on Foata normal form. 5/3121 useless extension candidates. Maximal degree in co-relation 18549. Up to 2880 conditions per place. [2024-06-14 12:23:13,346 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 103 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-14 12:23:13,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 1514 flow [2024-06-14 12:23:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:23:13,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 12:23:13,347 INFO L175 Difference]: Start difference. First operand has 133 places, 139 transitions, 1228 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:23:13,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 1514 flow [2024-06-14 12:23:13,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 148 transitions, 1434 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:13,432 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1212 flow [2024-06-14 12:23:13,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1212, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2024-06-14 12:23:13,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 12:23:13,432 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1212 flow [2024-06-14 12:23:13,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:13,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:13,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:13,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:23:13,433 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:13,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash 83956687, now seen corresponding path program 1 times [2024-06-14 12:23:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244206209] [2024-06-14 12:23:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:14,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244206209] [2024-06-14 12:23:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244206209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:14,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:14,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:14,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530693805] [2024-06-14 12:23:14,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:14,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:14,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:23:14,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1212 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:14,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:14,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:23:14,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:15,018 INFO L124 PetriNetUnfolderBase]: 1816/3072 cut-off events. [2024-06-14 12:23:15,018 INFO L125 PetriNetUnfolderBase]: For 85078/85078 co-relation queries the response was YES. [2024-06-14 12:23:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17612 conditions, 3072 events. 1816/3072 cut-off events. For 85078/85078 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17984 event pairs, 480 based on Foata normal form. 1/3072 useless extension candidates. Maximal degree in co-relation 17553. Up to 2769 conditions per place. [2024-06-14 12:23:15,037 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 131 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-06-14 12:23:15,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 157 transitions, 1586 flow [2024-06-14 12:23:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:23:15,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:23:15,038 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1212 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:23:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 157 transitions, 1586 flow [2024-06-14 12:23:15,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 157 transitions, 1510 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:15,122 INFO L231 Difference]: Finished difference. Result has 138 places, 142 transitions, 1222 flow [2024-06-14 12:23:15,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1222, PETRI_PLACES=138, PETRI_TRANSITIONS=142} [2024-06-14 12:23:15,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 12:23:15,122 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 142 transitions, 1222 flow [2024-06-14 12:23:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:15,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:15,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:23:15,123 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1467132309, now seen corresponding path program 1 times [2024-06-14 12:23:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34903406] [2024-06-14 12:23:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:15,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:15,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34903406] [2024-06-14 12:23:15,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34903406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:15,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:15,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:15,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005464944] [2024-06-14 12:23:15,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:15,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:15,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:15,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:15,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 142 transitions, 1222 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:15,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:15,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:15,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:16,433 INFO L124 PetriNetUnfolderBase]: 1903/3163 cut-off events. [2024-06-14 12:23:16,433 INFO L125 PetriNetUnfolderBase]: For 90531/90531 co-relation queries the response was YES. [2024-06-14 12:23:16,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18438 conditions, 3163 events. 1903/3163 cut-off events. For 90531/90531 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18221 event pairs, 503 based on Foata normal form. 2/3164 useless extension candidates. Maximal degree in co-relation 18378. Up to 2936 conditions per place. [2024-06-14 12:23:16,453 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 15 changer transitions 0/159 dead transitions. [2024-06-14 12:23:16,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 159 transitions, 1610 flow [2024-06-14 12:23:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:23:16,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:23:16,454 INFO L175 Difference]: Start difference. First operand has 138 places, 142 transitions, 1222 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:23:16,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 159 transitions, 1610 flow [2024-06-14 12:23:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 159 transitions, 1546 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:16,529 INFO L231 Difference]: Finished difference. Result has 140 places, 145 transitions, 1244 flow [2024-06-14 12:23:16,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=140, PETRI_TRANSITIONS=145} [2024-06-14 12:23:16,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 12:23:16,529 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 145 transitions, 1244 flow [2024-06-14 12:23:16,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:16,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:16,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:23:16,530 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:16,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 261445513, now seen corresponding path program 2 times [2024-06-14 12:23:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118054227] [2024-06-14 12:23:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:17,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:17,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118054227] [2024-06-14 12:23:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118054227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:17,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:17,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:17,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553341093] [2024-06-14 12:23:17,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:17,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:17,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:17,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:17,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:17,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 145 transitions, 1244 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:17,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:17,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:17,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:17,868 INFO L124 PetriNetUnfolderBase]: 1921/3191 cut-off events. [2024-06-14 12:23:17,868 INFO L125 PetriNetUnfolderBase]: For 96496/96498 co-relation queries the response was YES. [2024-06-14 12:23:17,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19091 conditions, 3191 events. 1921/3191 cut-off events. For 96496/96498 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18406 event pairs, 507 based on Foata normal form. 4/3194 useless extension candidates. Maximal degree in co-relation 19030. Up to 2932 conditions per place. [2024-06-14 12:23:17,889 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-14 12:23:17,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 164 transitions, 1764 flow [2024-06-14 12:23:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:23:17,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:17,890 INFO L175 Difference]: Start difference. First operand has 140 places, 145 transitions, 1244 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:23:17,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 164 transitions, 1764 flow [2024-06-14 12:23:17,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 164 transitions, 1700 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:17,977 INFO L231 Difference]: Finished difference. Result has 142 places, 151 transitions, 1348 flow [2024-06-14 12:23:17,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1348, PETRI_PLACES=142, PETRI_TRANSITIONS=151} [2024-06-14 12:23:17,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 12:23:17,977 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 151 transitions, 1348 flow [2024-06-14 12:23:17,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:17,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:17,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:17,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:23:17,978 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:17,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1460703219, now seen corresponding path program 3 times [2024-06-14 12:23:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107361670] [2024-06-14 12:23:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107361670] [2024-06-14 12:23:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107361670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:18,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123463539] [2024-06-14 12:23:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:18,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 151 transitions, 1348 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:18,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:19,323 INFO L124 PetriNetUnfolderBase]: 1915/3183 cut-off events. [2024-06-14 12:23:19,323 INFO L125 PetriNetUnfolderBase]: For 101851/101853 co-relation queries the response was YES. [2024-06-14 12:23:19,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19400 conditions, 3183 events. 1915/3183 cut-off events. For 101851/101853 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18357 event pairs, 509 based on Foata normal form. 4/3186 useless extension candidates. Maximal degree in co-relation 19338. Up to 2927 conditions per place. [2024-06-14 12:23:19,345 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-14 12:23:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 163 transitions, 1696 flow [2024-06-14 12:23:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:23:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:19,346 INFO L175 Difference]: Start difference. First operand has 142 places, 151 transitions, 1348 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:23:19,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 163 transitions, 1696 flow [2024-06-14 12:23:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 163 transitions, 1601 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:19,429 INFO L231 Difference]: Finished difference. Result has 146 places, 151 transitions, 1313 flow [2024-06-14 12:23:19,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1313, PETRI_PLACES=146, PETRI_TRANSITIONS=151} [2024-06-14 12:23:19,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 12:23:19,430 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 151 transitions, 1313 flow [2024-06-14 12:23:19,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:19,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:19,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:19,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:23:19,430 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 12:23:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash -845743800, now seen corresponding path program 1 times [2024-06-14 12:23:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:19,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395701389] [2024-06-14 12:23:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:19,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:20,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:20,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395701389] [2024-06-14 12:23:20,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395701389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:20,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49884884] [2024-06-14 12:23:20,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:20,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:20,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:20,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:20,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:20,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 151 transitions, 1313 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:20,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:20,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:20,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:20,783 INFO L124 PetriNetUnfolderBase]: 2023/3321 cut-off events. [2024-06-14 12:23:20,783 INFO L125 PetriNetUnfolderBase]: For 126774/126776 co-relation queries the response was YES. [2024-06-14 12:23:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21178 conditions, 3321 events. 2023/3321 cut-off events. For 126774/126776 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19121 event pairs, 550 based on Foata normal form. 4/3324 useless extension candidates. Maximal degree in co-relation 21114. Up to 3029 conditions per place. [2024-06-14 12:23:20,807 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 20 changer transitions 0/173 dead transitions. [2024-06-14 12:23:20,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 173 transitions, 1732 flow [2024-06-14 12:23:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:23:20,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:23:20,809 INFO L175 Difference]: Start difference. First operand has 146 places, 151 transitions, 1313 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:23:20,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 173 transitions, 1732 flow [2024-06-14 12:23:20,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 173 transitions, 1658 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:20,943 INFO L231 Difference]: Finished difference. Result has 147 places, 154 transitions, 1335 flow [2024-06-14 12:23:20,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=147, PETRI_TRANSITIONS=154} [2024-06-14 12:23:20,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 12:23:20,944 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 154 transitions, 1335 flow [2024-06-14 12:23:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:20,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:20,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:23:20,944 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:20,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1404546192, now seen corresponding path program 2 times [2024-06-14 12:23:20,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:20,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311554408] [2024-06-14 12:23:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311554408] [2024-06-14 12:23:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311554408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643081873] [2024-06-14 12:23:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:21,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:21,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 154 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:21,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:21,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:21,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:22,429 INFO L124 PetriNetUnfolderBase]: 2087/3421 cut-off events. [2024-06-14 12:23:22,429 INFO L125 PetriNetUnfolderBase]: For 136546/136548 co-relation queries the response was YES. [2024-06-14 12:23:22,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22345 conditions, 3421 events. 2087/3421 cut-off events. For 136546/136548 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19704 event pairs, 556 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 22280. Up to 3088 conditions per place. [2024-06-14 12:23:22,453 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 142 selfloop transitions, 34 changer transitions 0/189 dead transitions. [2024-06-14 12:23:22,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 189 transitions, 2058 flow [2024-06-14 12:23:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:23:22,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:23:22,455 INFO L175 Difference]: Start difference. First operand has 147 places, 154 transitions, 1335 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:23:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 189 transitions, 2058 flow [2024-06-14 12:23:22,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 189 transitions, 1943 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:22,562 INFO L231 Difference]: Finished difference. Result has 153 places, 172 transitions, 1566 flow [2024-06-14 12:23:22,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2024-06-14 12:23:22,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 12:23:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 1566 flow [2024-06-14 12:23:22,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:22,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:22,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:22,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:23:22,563 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:22,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -840021944, now seen corresponding path program 1 times [2024-06-14 12:23:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:22,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262287695] [2024-06-14 12:23:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:23,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:23,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262287695] [2024-06-14 12:23:23,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262287695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:23,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220160460] [2024-06-14 12:23:23,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:23,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:23,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:23,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:23,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:23,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:23,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:23,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:24,138 INFO L124 PetriNetUnfolderBase]: 2006/3309 cut-off events. [2024-06-14 12:23:24,138 INFO L125 PetriNetUnfolderBase]: For 141067/141079 co-relation queries the response was YES. [2024-06-14 12:23:24,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22182 conditions, 3309 events. 2006/3309 cut-off events. For 141067/141079 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19045 event pairs, 544 based on Foata normal form. 2/3288 useless extension candidates. Maximal degree in co-relation 22114. Up to 2985 conditions per place. [2024-06-14 12:23:24,162 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 24 changer transitions 0/190 dead transitions. [2024-06-14 12:23:24,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 190 transitions, 1978 flow [2024-06-14 12:23:24,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:23:24,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:23:24,163 INFO L175 Difference]: Start difference. First operand has 153 places, 172 transitions, 1566 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:23:24,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 190 transitions, 1978 flow [2024-06-14 12:23:24,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 190 transitions, 1920 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-14 12:23:24,273 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1608 flow [2024-06-14 12:23:24,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-14 12:23:24,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 12:23:24,273 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1608 flow [2024-06-14 12:23:24,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:24,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:24,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:24,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:23:24,274 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:24,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:24,274 INFO L85 PathProgramCache]: Analyzing trace with hash 481175928, now seen corresponding path program 3 times [2024-06-14 12:23:24,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:24,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194768697] [2024-06-14 12:23:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194768697] [2024-06-14 12:23:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194768697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:24,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349549401] [2024-06-14 12:23:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:24,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:24,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:25,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:25,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:25,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:25,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:25,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:25,629 INFO L124 PetriNetUnfolderBase]: 2094/3431 cut-off events. [2024-06-14 12:23:25,630 INFO L125 PetriNetUnfolderBase]: For 149815/149823 co-relation queries the response was YES. [2024-06-14 12:23:25,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23364 conditions, 3431 events. 2094/3431 cut-off events. For 149815/149823 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19652 event pairs, 551 based on Foata normal form. 4/3429 useless extension candidates. Maximal degree in co-relation 23293. Up to 3115 conditions per place. [2024-06-14 12:23:25,656 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-06-14 12:23:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 192 transitions, 2019 flow [2024-06-14 12:23:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:23:25,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 12:23:25,657 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1608 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:23:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 192 transitions, 2019 flow [2024-06-14 12:23:25,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 192 transitions, 1911 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:25,797 INFO L231 Difference]: Finished difference. Result has 161 places, 176 transitions, 1569 flow [2024-06-14 12:23:25,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1569, PETRI_PLACES=161, PETRI_TRANSITIONS=176} [2024-06-14 12:23:25,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:23:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 176 transitions, 1569 flow [2024-06-14 12:23:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:23:25,798 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:25,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash -816664986, now seen corresponding path program 4 times [2024-06-14 12:23:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:25,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385751794] [2024-06-14 12:23:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:26,621 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 12:23:26,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:26,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385751794] [2024-06-14 12:23:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385751794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:26,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322951883] [2024-06-14 12:23:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:26,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:26,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:26,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 176 transitions, 1569 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:26,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:26,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:26,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:27,264 INFO L124 PetriNetUnfolderBase]: 2109/3452 cut-off events. [2024-06-14 12:23:27,264 INFO L125 PetriNetUnfolderBase]: For 157097/157105 co-relation queries the response was YES. [2024-06-14 12:23:27,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23667 conditions, 3452 events. 2109/3452 cut-off events. For 157097/157105 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19780 event pairs, 549 based on Foata normal form. 4/3445 useless extension candidates. Maximal degree in co-relation 23595. Up to 3110 conditions per place. [2024-06-14 12:23:27,290 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 144 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-06-14 12:23:27,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 193 transitions, 2023 flow [2024-06-14 12:23:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:23:27,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 12:23:27,291 INFO L175 Difference]: Start difference. First operand has 161 places, 176 transitions, 1569 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:23:27,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 193 transitions, 2023 flow [2024-06-14 12:23:27,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 193 transitions, 1940 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:23:27,424 INFO L231 Difference]: Finished difference. Result has 161 places, 179 transitions, 1626 flow [2024-06-14 12:23:27,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1626, PETRI_PLACES=161, PETRI_TRANSITIONS=179} [2024-06-14 12:23:27,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:23:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 179 transitions, 1626 flow [2024-06-14 12:23:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:27,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:27,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:23:27,425 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:27,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1957114350, now seen corresponding path program 5 times [2024-06-14 12:23:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13240876] [2024-06-14 12:23:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:28,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:28,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13240876] [2024-06-14 12:23:28,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13240876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:28,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:28,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514913458] [2024-06-14 12:23:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:28,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:28,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:28,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:28,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 179 transitions, 1626 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:28,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:28,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:28,862 INFO L124 PetriNetUnfolderBase]: 2141/3507 cut-off events. [2024-06-14 12:23:28,862 INFO L125 PetriNetUnfolderBase]: For 169502/169514 co-relation queries the response was YES. [2024-06-14 12:23:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24707 conditions, 3507 events. 2141/3507 cut-off events. For 169502/169514 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20244 event pairs, 562 based on Foata normal form. 6/3502 useless extension candidates. Maximal degree in co-relation 24634. Up to 3107 conditions per place. [2024-06-14 12:23:28,893 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 56 changer transitions 0/206 dead transitions. [2024-06-14 12:23:28,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 206 transitions, 2426 flow [2024-06-14 12:23:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:23:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 12:23:28,894 INFO L175 Difference]: Start difference. First operand has 161 places, 179 transitions, 1626 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:23:28,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 206 transitions, 2426 flow [2024-06-14 12:23:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 206 transitions, 2308 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:29,017 INFO L231 Difference]: Finished difference. Result has 165 places, 191 transitions, 1887 flow [2024-06-14 12:23:29,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1887, PETRI_PLACES=165, PETRI_TRANSITIONS=191} [2024-06-14 12:23:29,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 12:23:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 191 transitions, 1887 flow [2024-06-14 12:23:29,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:29,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:29,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:29,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:23:29,018 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 12:23:29,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -952451642, now seen corresponding path program 6 times [2024-06-14 12:23:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:29,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381133622] [2024-06-14 12:23:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:29,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381133622] [2024-06-14 12:23:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381133622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:29,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:29,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:29,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142477220] [2024-06-14 12:23:29,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:29,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:29,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:29,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:29,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 191 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:29,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:29,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:30,468 INFO L124 PetriNetUnfolderBase]: 2135/3499 cut-off events. [2024-06-14 12:23:30,468 INFO L125 PetriNetUnfolderBase]: For 177503/177515 co-relation queries the response was YES. [2024-06-14 12:23:30,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25180 conditions, 3499 events. 2135/3499 cut-off events. For 177503/177515 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20219 event pairs, 564 based on Foata normal form. 6/3494 useless extension candidates. Maximal degree in co-relation 25104. Up to 3102 conditions per place. [2024-06-14 12:23:30,500 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 59 changer transitions 0/207 dead transitions. [2024-06-14 12:23:30,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 207 transitions, 2440 flow [2024-06-14 12:23:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:23:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:23:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:23:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 12:23:30,501 INFO L175 Difference]: Start difference. First operand has 165 places, 191 transitions, 1887 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:23:30,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 207 transitions, 2440 flow [2024-06-14 12:23:30,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 207 transitions, 2286 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-14 12:23:30,713 INFO L231 Difference]: Finished difference. Result has 171 places, 194 transitions, 1936 flow [2024-06-14 12:23:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=171, PETRI_TRANSITIONS=194} [2024-06-14 12:23:30,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 12:23:30,714 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 194 transitions, 1936 flow [2024-06-14 12:23:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:30,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:23:30,715 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 12:23:30,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1970009296, now seen corresponding path program 2 times [2024-06-14 12:23:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215036486] [2024-06-14 12:23:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:31,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:31,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215036486] [2024-06-14 12:23:31,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215036486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:31,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:31,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:31,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596924235] [2024-06-14 12:23:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:31,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:31,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 194 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:31,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:31,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:31,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:32,381 INFO L124 PetriNetUnfolderBase]: 2050/3374 cut-off events. [2024-06-14 12:23:32,381 INFO L125 PetriNetUnfolderBase]: For 177572/177593 co-relation queries the response was YES. [2024-06-14 12:23:32,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24294 conditions, 3374 events. 2050/3374 cut-off events. For 177572/177593 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19579 event pairs, 555 based on Foata normal form. 5/3353 useless extension candidates. Maximal degree in co-relation 24215. Up to 3005 conditions per place. [2024-06-14 12:23:32,407 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 48 changer transitions 0/217 dead transitions. [2024-06-14 12:23:32,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 217 transitions, 2656 flow [2024-06-14 12:23:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:23:32,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:23:32,408 INFO L175 Difference]: Start difference. First operand has 171 places, 194 transitions, 1936 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:23:32,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 217 transitions, 2656 flow [2024-06-14 12:23:32,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 217 transitions, 2578 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:32,544 INFO L231 Difference]: Finished difference. Result has 177 places, 205 transitions, 2136 flow [2024-06-14 12:23:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2136, PETRI_PLACES=177, PETRI_TRANSITIONS=205} [2024-06-14 12:23:32,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:23:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 205 transitions, 2136 flow [2024-06-14 12:23:32,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:32,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:32,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:23:32,545 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 12:23:32,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash -484861040, now seen corresponding path program 3 times [2024-06-14 12:23:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360829989] [2024-06-14 12:23:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:33,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360829989] [2024-06-14 12:23:33,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360829989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:33,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:33,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227453214] [2024-06-14 12:23:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:33,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:33,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 205 transitions, 2136 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:33,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:33,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:33,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:34,156 INFO L124 PetriNetUnfolderBase]: 2048/3370 cut-off events. [2024-06-14 12:23:34,157 INFO L125 PetriNetUnfolderBase]: For 184880/184899 co-relation queries the response was YES. [2024-06-14 12:23:34,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24663 conditions, 3370 events. 2048/3370 cut-off events. For 184880/184899 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19518 event pairs, 554 based on Foata normal form. 14/3358 useless extension candidates. Maximal degree in co-relation 24582. Up to 3004 conditions per place. [2024-06-14 12:23:34,187 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 50 changer transitions 0/216 dead transitions. [2024-06-14 12:23:34,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 216 transitions, 2622 flow [2024-06-14 12:23:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:23:34,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:23:34,190 INFO L175 Difference]: Start difference. First operand has 177 places, 205 transitions, 2136 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:23:34,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 216 transitions, 2622 flow [2024-06-14 12:23:34,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 216 transitions, 2514 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:34,366 INFO L231 Difference]: Finished difference. Result has 182 places, 205 transitions, 2134 flow [2024-06-14 12:23:34,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2134, PETRI_PLACES=182, PETRI_TRANSITIONS=205} [2024-06-14 12:23:34,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:23:34,367 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 205 transitions, 2134 flow [2024-06-14 12:23:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:34,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:34,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:34,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:23:34,367 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 12:23:34,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1957122286, now seen corresponding path program 4 times [2024-06-14 12:23:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:34,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329626013] [2024-06-14 12:23:34,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:35,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329626013] [2024-06-14 12:23:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329626013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:35,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:35,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:35,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684631668] [2024-06-14 12:23:35,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:35,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:35,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:35,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:35,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 205 transitions, 2134 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:35,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:35,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:35,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:35,964 INFO L124 PetriNetUnfolderBase]: 2044/3363 cut-off events. [2024-06-14 12:23:35,964 INFO L125 PetriNetUnfolderBase]: For 189650/189665 co-relation queries the response was YES. [2024-06-14 12:23:35,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24739 conditions, 3363 events. 2044/3363 cut-off events. For 189650/189665 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19459 event pairs, 553 based on Foata normal form. 5/3343 useless extension candidates. Maximal degree in co-relation 24656. Up to 3001 conditions per place. [2024-06-14 12:23:35,994 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 46 changer transitions 0/216 dead transitions. [2024-06-14 12:23:35,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 216 transitions, 2539 flow [2024-06-14 12:23:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:23:35,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:23:35,995 INFO L175 Difference]: Start difference. First operand has 182 places, 205 transitions, 2134 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:23:35,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 216 transitions, 2539 flow [2024-06-14 12:23:36,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 216 transitions, 2415 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:36,205 INFO L231 Difference]: Finished difference. Result has 184 places, 206 transitions, 2117 flow [2024-06-14 12:23:36,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2117, PETRI_PLACES=184, PETRI_TRANSITIONS=206} [2024-06-14 12:23:36,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:23:36,205 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 206 transitions, 2117 flow [2024-06-14 12:23:36,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:36,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:36,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:36,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:23:36,205 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:36,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1517126572, now seen corresponding path program 7 times [2024-06-14 12:23:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:36,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674241551] [2024-06-14 12:23:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:36,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674241551] [2024-06-14 12:23:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674241551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:36,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:36,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:23:36,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080784662] [2024-06-14 12:23:36,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:36,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:23:36,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:23:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:23:37,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:37,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 206 transitions, 2117 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:37,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:37,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:37,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:37,679 INFO L124 PetriNetUnfolderBase]: 2187/3578 cut-off events. [2024-06-14 12:23:37,680 INFO L125 PetriNetUnfolderBase]: For 197945/197947 co-relation queries the response was YES. [2024-06-14 12:23:37,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26128 conditions, 3578 events. 2187/3578 cut-off events. For 197945/197947 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20607 event pairs, 554 based on Foata normal form. 4/3573 useless extension candidates. Maximal degree in co-relation 26044. Up to 3209 conditions per place. [2024-06-14 12:23:37,711 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 182 selfloop transitions, 53 changer transitions 0/248 dead transitions. [2024-06-14 12:23:37,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 248 transitions, 2920 flow [2024-06-14 12:23:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:23:37,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:23:37,712 INFO L175 Difference]: Start difference. First operand has 184 places, 206 transitions, 2117 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:23:37,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 248 transitions, 2920 flow [2024-06-14 12:23:37,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 248 transitions, 2802 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:37,991 INFO L231 Difference]: Finished difference. Result has 189 places, 227 transitions, 2439 flow [2024-06-14 12:23:37,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=189, PETRI_TRANSITIONS=227} [2024-06-14 12:23:37,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 12:23:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 227 transitions, 2439 flow [2024-06-14 12:23:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:37,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:37,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:37,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:23:37,992 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:37,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1579744973, now seen corresponding path program 1 times [2024-06-14 12:23:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:37,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804256625] [2024-06-14 12:23:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:37,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:39,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:39,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804256625] [2024-06-14 12:23:39,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804256625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:39,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:39,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028912927] [2024-06-14 12:23:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:39,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:39,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 227 transitions, 2439 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:39,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:39,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:39,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:39,884 INFO L124 PetriNetUnfolderBase]: 2174/3565 cut-off events. [2024-06-14 12:23:39,885 INFO L125 PetriNetUnfolderBase]: For 202023/202023 co-relation queries the response was YES. [2024-06-14 12:23:39,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3565 events. 2174/3565 cut-off events. For 202023/202023 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20562 event pairs, 562 based on Foata normal form. 1/3565 useless extension candidates. Maximal degree in co-relation 26162. Up to 3277 conditions per place. [2024-06-14 12:23:39,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2024-06-14 12:23:39,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 246 transitions, 3017 flow [2024-06-14 12:23:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:39,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:23:39,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:23:39,918 INFO L175 Difference]: Start difference. First operand has 189 places, 227 transitions, 2439 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:23:39,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 246 transitions, 3017 flow [2024-06-14 12:23:40,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 246 transitions, 2889 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:40,212 INFO L231 Difference]: Finished difference. Result has 191 places, 230 transitions, 2421 flow [2024-06-14 12:23:40,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2421, PETRI_PLACES=191, PETRI_TRANSITIONS=230} [2024-06-14 12:23:40,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:23:40,212 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 230 transitions, 2421 flow [2024-06-14 12:23:40,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:40,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:40,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:23:40,213 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:40,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1688583472, now seen corresponding path program 1 times [2024-06-14 12:23:40,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:40,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766541761] [2024-06-14 12:23:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:40,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:41,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:41,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766541761] [2024-06-14 12:23:41,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766541761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:41,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:41,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:41,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549305123] [2024-06-14 12:23:41,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:41,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:41,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 230 transitions, 2421 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:41,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:41,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:41,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:41,799 INFO L124 PetriNetUnfolderBase]: 2184/3585 cut-off events. [2024-06-14 12:23:41,799 INFO L125 PetriNetUnfolderBase]: For 214260/214260 co-relation queries the response was YES. [2024-06-14 12:23:41,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26716 conditions, 3585 events. 2184/3585 cut-off events. For 214260/214260 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20730 event pairs, 557 based on Foata normal form. 4/3588 useless extension candidates. Maximal degree in co-relation 26629. Up to 3284 conditions per place. [2024-06-14 12:23:41,834 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 18 changer transitions 0/249 dead transitions. [2024-06-14 12:23:41,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 249 transitions, 3003 flow [2024-06-14 12:23:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:41,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:23:41,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:23:41,835 INFO L175 Difference]: Start difference. First operand has 191 places, 230 transitions, 2421 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:23:41,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 249 transitions, 3003 flow [2024-06-14 12:23:42,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 249 transitions, 2915 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:42,152 INFO L231 Difference]: Finished difference. Result has 193 places, 233 transitions, 2439 flow [2024-06-14 12:23:42,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2439, PETRI_PLACES=193, PETRI_TRANSITIONS=233} [2024-06-14 12:23:42,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 12:23:42,153 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 233 transitions, 2439 flow [2024-06-14 12:23:42,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:42,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:42,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:23:42,153 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:42,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -485121998, now seen corresponding path program 2 times [2024-06-14 12:23:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:42,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875857587] [2024-06-14 12:23:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:43,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875857587] [2024-06-14 12:23:43,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875857587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:43,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:43,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:43,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378976266] [2024-06-14 12:23:43,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:43,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:43,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:43,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 233 transitions, 2439 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:43,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:43,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:43,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:43,787 INFO L124 PetriNetUnfolderBase]: 2225/3655 cut-off events. [2024-06-14 12:23:43,787 INFO L125 PetriNetUnfolderBase]: For 231990/231992 co-relation queries the response was YES. [2024-06-14 12:23:43,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27946 conditions, 3655 events. 2225/3655 cut-off events. For 231990/231992 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21275 event pairs, 562 based on Foata normal form. 6/3657 useless extension candidates. Maximal degree in co-relation 27858. Up to 3273 conditions per place. [2024-06-14 12:23:43,823 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 205 selfloop transitions, 42 changer transitions 0/258 dead transitions. [2024-06-14 12:23:43,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 258 transitions, 3367 flow [2024-06-14 12:23:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:23:43,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:23:43,824 INFO L175 Difference]: Start difference. First operand has 193 places, 233 transitions, 2439 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:23:43,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 258 transitions, 3367 flow [2024-06-14 12:23:44,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 258 transitions, 3283 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:44,152 INFO L231 Difference]: Finished difference. Result has 195 places, 242 transitions, 2643 flow [2024-06-14 12:23:44,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2643, PETRI_PLACES=195, PETRI_TRANSITIONS=242} [2024-06-14 12:23:44,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-14 12:23:44,152 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 242 transitions, 2643 flow [2024-06-14 12:23:44,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:44,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:44,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:23:44,153 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:44,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1970460718, now seen corresponding path program 3 times [2024-06-14 12:23:44,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:44,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368481489] [2024-06-14 12:23:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:45,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:45,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368481489] [2024-06-14 12:23:45,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368481489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:45,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:45,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:45,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579674509] [2024-06-14 12:23:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:45,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:45,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:45,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:45,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 242 transitions, 2643 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:45,798 INFO L124 PetriNetUnfolderBase]: 2215/3641 cut-off events. [2024-06-14 12:23:45,798 INFO L125 PetriNetUnfolderBase]: For 237662/237664 co-relation queries the response was YES. [2024-06-14 12:23:45,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28140 conditions, 3641 events. 2215/3641 cut-off events. For 237662/237664 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21202 event pairs, 558 based on Foata normal form. 5/3645 useless extension candidates. Maximal degree in co-relation 28051. Up to 3267 conditions per place. [2024-06-14 12:23:45,833 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 202 selfloop transitions, 44 changer transitions 0/257 dead transitions. [2024-06-14 12:23:45,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 257 transitions, 3279 flow [2024-06-14 12:23:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:23:45,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:23:45,836 INFO L175 Difference]: Start difference. First operand has 195 places, 242 transitions, 2643 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:23:45,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 257 transitions, 3279 flow [2024-06-14 12:23:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 257 transitions, 3142 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 12:23:46,104 INFO L231 Difference]: Finished difference. Result has 200 places, 242 transitions, 2601 flow [2024-06-14 12:23:46,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2601, PETRI_PLACES=200, PETRI_TRANSITIONS=242} [2024-06-14 12:23:46,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 12:23:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 242 transitions, 2601 flow [2024-06-14 12:23:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:46,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:46,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:23:46,105 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:46,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1962842158, now seen corresponding path program 4 times [2024-06-14 12:23:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191052869] [2024-06-14 12:23:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191052869] [2024-06-14 12:23:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191052869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:47,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788367989] [2024-06-14 12:23:47,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:47,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:47,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 242 transitions, 2601 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:47,831 INFO L124 PetriNetUnfolderBase]: 2203/3625 cut-off events. [2024-06-14 12:23:47,831 INFO L125 PetriNetUnfolderBase]: For 239547/239549 co-relation queries the response was YES. [2024-06-14 12:23:47,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27932 conditions, 3625 events. 2203/3625 cut-off events. For 239547/239549 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21115 event pairs, 562 based on Foata normal form. 6/3628 useless extension candidates. Maximal degree in co-relation 27841. Up to 3259 conditions per place. [2024-06-14 12:23:47,860 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 204 selfloop transitions, 41 changer transitions 0/256 dead transitions. [2024-06-14 12:23:47,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 256 transitions, 3133 flow [2024-06-14 12:23:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:23:47,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:23:47,861 INFO L175 Difference]: Start difference. First operand has 200 places, 242 transitions, 2601 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:23:47,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 256 transitions, 3133 flow [2024-06-14 12:23:48,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 256 transitions, 3013 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:48,155 INFO L231 Difference]: Finished difference. Result has 202 places, 242 transitions, 2569 flow [2024-06-14 12:23:48,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=202, PETRI_TRANSITIONS=242} [2024-06-14 12:23:48,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 12:23:48,156 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 242 transitions, 2569 flow [2024-06-14 12:23:48,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:48,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:48,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:23:48,157 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:48,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1970470638, now seen corresponding path program 1 times [2024-06-14 12:23:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048088508] [2024-06-14 12:23:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048088508] [2024-06-14 12:23:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048088508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:49,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211171037] [2024-06-14 12:23:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:49,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:49,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:49,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 242 transitions, 2569 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:49,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:49,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:49,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:50,094 INFO L124 PetriNetUnfolderBase]: 2137/3525 cut-off events. [2024-06-14 12:23:50,094 INFO L125 PetriNetUnfolderBase]: For 241835/241839 co-relation queries the response was YES. [2024-06-14 12:23:50,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27351 conditions, 3525 events. 2137/3525 cut-off events. For 241835/241839 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20614 event pairs, 573 based on Foata normal form. 1/3504 useless extension candidates. Maximal degree in co-relation 27259. Up to 3204 conditions per place. [2024-06-14 12:23:50,130 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 21 changer transitions 0/256 dead transitions. [2024-06-14 12:23:50,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3093 flow [2024-06-14 12:23:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:23:50,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:23:50,132 INFO L175 Difference]: Start difference. First operand has 202 places, 242 transitions, 2569 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:23:50,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3093 flow [2024-06-14 12:23:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2967 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:23:50,532 INFO L231 Difference]: Finished difference. Result has 203 places, 245 transitions, 2555 flow [2024-06-14 12:23:50,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2555, PETRI_PLACES=203, PETRI_TRANSITIONS=245} [2024-06-14 12:23:50,532 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 12:23:50,532 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 245 transitions, 2555 flow [2024-06-14 12:23:50,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:50,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:50,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:50,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:23:50,533 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:50,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 298539060, now seen corresponding path program 1 times [2024-06-14 12:23:50,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123143595] [2024-06-14 12:23:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:50,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123143595] [2024-06-14 12:23:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123143595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:51,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:51,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523277265] [2024-06-14 12:23:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:51,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:51,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 245 transitions, 2555 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:51,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:51,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:51,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:52,206 INFO L124 PetriNetUnfolderBase]: 2248/3670 cut-off events. [2024-06-14 12:23:52,206 INFO L125 PetriNetUnfolderBase]: For 253856/253856 co-relation queries the response was YES. [2024-06-14 12:23:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28676 conditions, 3670 events. 2248/3670 cut-off events. For 253856/253856 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21269 event pairs, 549 based on Foata normal form. 2/3663 useless extension candidates. Maximal degree in co-relation 28583. Up to 3337 conditions per place. [2024-06-14 12:23:52,244 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 24 changer transitions 0/274 dead transitions. [2024-06-14 12:23:52,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 274 transitions, 3232 flow [2024-06-14 12:23:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:23:52,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:23:52,245 INFO L175 Difference]: Start difference. First operand has 203 places, 245 transitions, 2555 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:23:52,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 274 transitions, 3232 flow [2024-06-14 12:23:52,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 274 transitions, 3056 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 12:23:52,676 INFO L231 Difference]: Finished difference. Result has 202 places, 249 transitions, 2525 flow [2024-06-14 12:23:52,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2525, PETRI_PLACES=202, PETRI_TRANSITIONS=249} [2024-06-14 12:23:52,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 12:23:52,677 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 249 transitions, 2525 flow [2024-06-14 12:23:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:52,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:52,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:52,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:23:52,677 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:52,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1918118432, now seen corresponding path program 2 times [2024-06-14 12:23:52,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:52,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118291001] [2024-06-14 12:23:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:52,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:53,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:53,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118291001] [2024-06-14 12:23:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118291001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:53,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:53,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:23:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186491104] [2024-06-14 12:23:53,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:53,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:23:53,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:23:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:23:53,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:53,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 249 transitions, 2525 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:53,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:53,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:53,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:54,465 INFO L124 PetriNetUnfolderBase]: 2296/3745 cut-off events. [2024-06-14 12:23:54,465 INFO L125 PetriNetUnfolderBase]: For 266545/266545 co-relation queries the response was YES. [2024-06-14 12:23:54,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29736 conditions, 3745 events. 2296/3745 cut-off events. For 266545/266545 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21710 event pairs, 591 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 29642. Up to 3392 conditions per place. [2024-06-14 12:23:54,502 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 241 selfloop transitions, 34 changer transitions 0/289 dead transitions. [2024-06-14 12:23:54,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 289 transitions, 3423 flow [2024-06-14 12:23:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:23:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:23:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 12:23:54,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 12:23:54,503 INFO L175 Difference]: Start difference. First operand has 202 places, 249 transitions, 2525 flow. Second operand 10 states and 186 transitions. [2024-06-14 12:23:54,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 289 transitions, 3423 flow [2024-06-14 12:23:55,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 289 transitions, 3235 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:55,021 INFO L231 Difference]: Finished difference. Result has 209 places, 265 transitions, 2720 flow [2024-06-14 12:23:55,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2720, PETRI_PLACES=209, PETRI_TRANSITIONS=265} [2024-06-14 12:23:55,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 12:23:55,021 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 265 transitions, 2720 flow [2024-06-14 12:23:55,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:55,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:55,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:55,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:23:55,022 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:55,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash -448551266, now seen corresponding path program 3 times [2024-06-14 12:23:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:55,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726907941] [2024-06-14 12:23:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:55,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726907941] [2024-06-14 12:23:55,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726907941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:55,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:55,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566428592] [2024-06-14 12:23:55,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:55,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:55,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:55,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:55,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 265 transitions, 2720 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:55,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:55,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:55,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:56,597 INFO L124 PetriNetUnfolderBase]: 2306/3764 cut-off events. [2024-06-14 12:23:56,598 INFO L125 PetriNetUnfolderBase]: For 278628/278630 co-relation queries the response was YES. [2024-06-14 12:23:56,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 3764 events. 2306/3764 cut-off events. For 278628/278630 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21880 event pairs, 591 based on Foata normal form. 4/3755 useless extension candidates. Maximal degree in co-relation 30221. Up to 3334 conditions per place. [2024-06-14 12:23:56,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 229 selfloop transitions, 48 changer transitions 0/291 dead transitions. [2024-06-14 12:23:56,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 291 transitions, 3429 flow [2024-06-14 12:23:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:23:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:23:56,634 INFO L175 Difference]: Start difference. First operand has 209 places, 265 transitions, 2720 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:23:56,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 291 transitions, 3429 flow [2024-06-14 12:23:57,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 291 transitions, 3303 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:57,214 INFO L231 Difference]: Finished difference. Result has 213 places, 268 transitions, 2786 flow [2024-06-14 12:23:57,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2786, PETRI_PLACES=213, PETRI_TRANSITIONS=268} [2024-06-14 12:23:57,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 12:23:57,215 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 268 transitions, 2786 flow [2024-06-14 12:23:57,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:57,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:57,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:23:57,216 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:57,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1250402278, now seen corresponding path program 1 times [2024-06-14 12:23:57,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:57,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050200815] [2024-06-14 12:23:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:58,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050200815] [2024-06-14 12:23:58,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050200815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:58,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:58,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924236614] [2024-06-14 12:23:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:58,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:23:58,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 268 transitions, 2786 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:58,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:58,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:23:58,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:59,214 INFO L124 PetriNetUnfolderBase]: 2311/3771 cut-off events. [2024-06-14 12:23:59,214 INFO L125 PetriNetUnfolderBase]: For 289595/289595 co-relation queries the response was YES. [2024-06-14 12:23:59,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30953 conditions, 3771 events. 2311/3771 cut-off events. For 289595/289595 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21926 event pairs, 562 based on Foata normal form. 1/3758 useless extension candidates. Maximal degree in co-relation 30855. Up to 3373 conditions per place. [2024-06-14 12:23:59,247 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 44 changer transitions 0/293 dead transitions. [2024-06-14 12:23:59,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 3491 flow [2024-06-14 12:23:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:23:59,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:23:59,249 INFO L175 Difference]: Start difference. First operand has 213 places, 268 transitions, 2786 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:23:59,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 3491 flow [2024-06-14 12:23:59,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 293 transitions, 3318 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:59,590 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 2793 flow [2024-06-14 12:23:59,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2793, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-14 12:23:59,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 12:23:59,590 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 2793 flow [2024-06-14 12:23:59,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:59,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:59,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:59,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:23:59,591 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:23:59,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1216160778, now seen corresponding path program 1 times [2024-06-14 12:23:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:59,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882199501] [2024-06-14 12:23:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:59,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:00,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:00,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882199501] [2024-06-14 12:24:00,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882199501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:00,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:00,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313538726] [2024-06-14 12:24:00,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:00,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:00,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 2793 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:00,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:00,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:00,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:01,272 INFO L124 PetriNetUnfolderBase]: 2403/3875 cut-off events. [2024-06-14 12:24:01,272 INFO L125 PetriNetUnfolderBase]: For 301087/301091 co-relation queries the response was YES. [2024-06-14 12:24:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31802 conditions, 3875 events. 2403/3875 cut-off events. For 301087/301091 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22181 event pairs, 586 based on Foata normal form. 6/3880 useless extension candidates. Maximal degree in co-relation 31704. Up to 3583 conditions per place. [2024-06-14 12:24:01,308 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 41 changer transitions 0/292 dead transitions. [2024-06-14 12:24:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 292 transitions, 3494 flow [2024-06-14 12:24:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:24:01,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:24:01,309 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 2793 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:24:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 292 transitions, 3494 flow [2024-06-14 12:24:01,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 292 transitions, 3336 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:01,806 INFO L231 Difference]: Finished difference. Result has 218 places, 274 transitions, 2802 flow [2024-06-14 12:24:01,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2802, PETRI_PLACES=218, PETRI_TRANSITIONS=274} [2024-06-14 12:24:01,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 12:24:01,806 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 274 transitions, 2802 flow [2024-06-14 12:24:01,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:01,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:01,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:01,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:24:01,807 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:01,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -448252736, now seen corresponding path program 4 times [2024-06-14 12:24:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257230197] [2024-06-14 12:24:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:02,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:02,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257230197] [2024-06-14 12:24:02,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257230197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:02,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108296473] [2024-06-14 12:24:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:02,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:02,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:02,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:02,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:02,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 274 transitions, 2802 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:02,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:02,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:02,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:03,512 INFO L124 PetriNetUnfolderBase]: 2344/3818 cut-off events. [2024-06-14 12:24:03,512 INFO L125 PetriNetUnfolderBase]: For 317863/317881 co-relation queries the response was YES. [2024-06-14 12:24:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32186 conditions, 3818 events. 2344/3818 cut-off events. For 317863/317881 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22190 event pairs, 551 based on Foata normal form. 4/3804 useless extension candidates. Maximal degree in co-relation 32087. Up to 3334 conditions per place. [2024-06-14 12:24:03,550 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 220 selfloop transitions, 63 changer transitions 0/298 dead transitions. [2024-06-14 12:24:03,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 298 transitions, 3529 flow [2024-06-14 12:24:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:24:03,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:24:03,551 INFO L175 Difference]: Start difference. First operand has 218 places, 274 transitions, 2802 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:24:03,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 298 transitions, 3529 flow [2024-06-14 12:24:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 298 transitions, 3383 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:04,079 INFO L231 Difference]: Finished difference. Result has 220 places, 277 transitions, 2892 flow [2024-06-14 12:24:04,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2892, PETRI_PLACES=220, PETRI_TRANSITIONS=277} [2024-06-14 12:24:04,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 12:24:04,080 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 277 transitions, 2892 flow [2024-06-14 12:24:04,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:04,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:04,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:24:04,080 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:04,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1726292936, now seen corresponding path program 2 times [2024-06-14 12:24:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:04,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180722539] [2024-06-14 12:24:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180722539] [2024-06-14 12:24:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180722539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:04,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034420289] [2024-06-14 12:24:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:04,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:05,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:05,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 277 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:05,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:05,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:05,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:05,796 INFO L124 PetriNetUnfolderBase]: 2455/3954 cut-off events. [2024-06-14 12:24:05,796 INFO L125 PetriNetUnfolderBase]: For 336857/336859 co-relation queries the response was YES. [2024-06-14 12:24:05,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33767 conditions, 3954 events. 2455/3954 cut-off events. For 336857/336859 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22727 event pairs, 600 based on Foata normal form. 4/3957 useless extension candidates. Maximal degree in co-relation 33667. Up to 3559 conditions per place. [2024-06-14 12:24:05,836 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 234 selfloop transitions, 69 changer transitions 0/308 dead transitions. [2024-06-14 12:24:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 308 transitions, 4045 flow [2024-06-14 12:24:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:24:05,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:24:05,837 INFO L175 Difference]: Start difference. First operand has 220 places, 277 transitions, 2892 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:24:05,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 308 transitions, 4045 flow [2024-06-14 12:24:06,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 308 transitions, 3835 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:06,503 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 3123 flow [2024-06-14 12:24:06,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3123, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-14 12:24:06,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 12:24:06,504 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 3123 flow [2024-06-14 12:24:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:06,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:06,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:06,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:24:06,505 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:06,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1928069432, now seen corresponding path program 5 times [2024-06-14 12:24:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000522760] [2024-06-14 12:24:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:07,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:07,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000522760] [2024-06-14 12:24:07,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000522760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:07,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:07,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:07,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855626897] [2024-06-14 12:24:07,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:07,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:07,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:07,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:07,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:07,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 3123 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:07,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:07,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:07,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:08,197 INFO L124 PetriNetUnfolderBase]: 2424/3947 cut-off events. [2024-06-14 12:24:08,197 INFO L125 PetriNetUnfolderBase]: For 365547/365554 co-relation queries the response was YES. [2024-06-14 12:24:08,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34972 conditions, 3947 events. 2424/3947 cut-off events. For 365547/365554 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23176 event pairs, 568 based on Foata normal form. 9/3942 useless extension candidates. Maximal degree in co-relation 34870. Up to 3337 conditions per place. [2024-06-14 12:24:08,239 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 205 selfloop transitions, 93 changer transitions 0/317 dead transitions. [2024-06-14 12:24:08,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 317 transitions, 4329 flow [2024-06-14 12:24:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:24:08,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 12:24:08,240 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 3123 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:24:08,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 317 transitions, 4329 flow [2024-06-14 12:24:08,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 317 transitions, 4191 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:08,894 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 3497 flow [2024-06-14 12:24:08,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3497, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2024-06-14 12:24:08,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 12:24:08,894 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 3497 flow [2024-06-14 12:24:08,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:08,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:08,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:08,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:24:08,895 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:08,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1726172594, now seen corresponding path program 6 times [2024-06-14 12:24:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:08,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798007902] [2024-06-14 12:24:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:09,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:09,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798007902] [2024-06-14 12:24:09,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798007902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:09,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:09,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:09,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483789025] [2024-06-14 12:24:09,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:09,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:09,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:09,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 3497 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:09,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:09,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:10,684 INFO L124 PetriNetUnfolderBase]: 2438/3959 cut-off events. [2024-06-14 12:24:10,685 INFO L125 PetriNetUnfolderBase]: For 379055/379058 co-relation queries the response was YES. [2024-06-14 12:24:10,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35815 conditions, 3959 events. 2438/3959 cut-off events. For 379055/379058 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23058 event pairs, 601 based on Foata normal form. 5/3955 useless extension candidates. Maximal degree in co-relation 35711. Up to 3564 conditions per place. [2024-06-14 12:24:10,725 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 39 changer transitions 0/320 dead transitions. [2024-06-14 12:24:10,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 320 transitions, 4298 flow [2024-06-14 12:24:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:24:10,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:24:10,726 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 3497 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:24:10,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 320 transitions, 4298 flow [2024-06-14 12:24:11,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 320 transitions, 4120 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:11,239 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 3557 flow [2024-06-14 12:24:11,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3557, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2024-06-14 12:24:11,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 12:24:11,240 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 3557 flow [2024-06-14 12:24:11,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:11,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:11,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:11,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:24:11,240 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:11,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash 418777272, now seen corresponding path program 3 times [2024-06-14 12:24:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723898243] [2024-06-14 12:24:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:12,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:12,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723898243] [2024-06-14 12:24:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723898243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854785384] [2024-06-14 12:24:12,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:12,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:12,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:12,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 3557 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:12,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:12,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:12,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:12,924 INFO L124 PetriNetUnfolderBase]: 2506/4035 cut-off events. [2024-06-14 12:24:12,924 INFO L125 PetriNetUnfolderBase]: For 381408/381410 co-relation queries the response was YES. [2024-06-14 12:24:12,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36043 conditions, 4035 events. 2506/4035 cut-off events. For 381408/381410 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23236 event pairs, 599 based on Foata normal form. 4/4038 useless extension candidates. Maximal degree in co-relation 35937. Up to 3633 conditions per place. [2024-06-14 12:24:12,966 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 243 selfloop transitions, 74 changer transitions 0/322 dead transitions. [2024-06-14 12:24:12,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 322 transitions, 4371 flow [2024-06-14 12:24:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:24:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:24:12,967 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 3557 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:24:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 322 transitions, 4371 flow [2024-06-14 12:24:13,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 322 transitions, 4141 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:13,453 INFO L231 Difference]: Finished difference. Result has 236 places, 303 transitions, 3481 flow [2024-06-14 12:24:13,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3481, PETRI_PLACES=236, PETRI_TRANSITIONS=303} [2024-06-14 12:24:13,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 12:24:13,454 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 303 transitions, 3481 flow [2024-06-14 12:24:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:13,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:13,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:24:13,455 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:13,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash 295679124, now seen corresponding path program 1 times [2024-06-14 12:24:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948532361] [2024-06-14 12:24:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:13,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:14,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:14,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948532361] [2024-06-14 12:24:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948532361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:14,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:14,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:14,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221224115] [2024-06-14 12:24:14,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:14,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:14,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:14,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 303 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:14,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:14,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:14,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:15,139 INFO L124 PetriNetUnfolderBase]: 2440/3949 cut-off events. [2024-06-14 12:24:15,139 INFO L125 PetriNetUnfolderBase]: For 393128/393131 co-relation queries the response was YES. [2024-06-14 12:24:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35907 conditions, 3949 events. 2440/3949 cut-off events. For 393128/393131 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22903 event pairs, 469 based on Foata normal form. 5/3945 useless extension candidates. Maximal degree in co-relation 35800. Up to 3554 conditions per place. [2024-06-14 12:24:15,181 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 286 selfloop transitions, 26 changer transitions 0/331 dead transitions. [2024-06-14 12:24:15,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 4242 flow [2024-06-14 12:24:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:24:15,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:24:15,182 INFO L175 Difference]: Start difference. First operand has 236 places, 303 transitions, 3481 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:24:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 4242 flow [2024-06-14 12:24:15,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 331 transitions, 4096 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:15,799 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3456 flow [2024-06-14 12:24:15,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-14 12:24:15,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:24:15,799 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3456 flow [2024-06-14 12:24:15,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:15,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:15,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:15,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:24:15,800 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:15,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 304250004, now seen corresponding path program 2 times [2024-06-14 12:24:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:15,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827348047] [2024-06-14 12:24:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:16,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:16,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827348047] [2024-06-14 12:24:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827348047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:16,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:16,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730030715] [2024-06-14 12:24:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:16,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:16,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:16,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:16,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:16,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:17,563 INFO L124 PetriNetUnfolderBase]: 2448/3976 cut-off events. [2024-06-14 12:24:17,564 INFO L125 PetriNetUnfolderBase]: For 403729/403732 co-relation queries the response was YES. [2024-06-14 12:24:17,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 3976 events. 2448/3976 cut-off events. For 403729/403732 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23246 event pairs, 563 based on Foata normal form. 5/3972 useless extension candidates. Maximal degree in co-relation 36137. Up to 3596 conditions per place. [2024-06-14 12:24:17,611 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 280 selfloop transitions, 30 changer transitions 0/329 dead transitions. [2024-06-14 12:24:17,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 329 transitions, 4205 flow [2024-06-14 12:24:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:24:17,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:24:17,612 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3456 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:24:17,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 329 transitions, 4205 flow [2024-06-14 12:24:18,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 329 transitions, 4100 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:18,278 INFO L231 Difference]: Finished difference. Result has 240 places, 307 transitions, 3485 flow [2024-06-14 12:24:18,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3485, PETRI_PLACES=240, PETRI_TRANSITIONS=307} [2024-06-14 12:24:18,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 12:24:18,279 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 307 transitions, 3485 flow [2024-06-14 12:24:18,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:18,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:18,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:18,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:24:18,279 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:18,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1927946486, now seen corresponding path program 3 times [2024-06-14 12:24:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487095920] [2024-06-14 12:24:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:19,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:19,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487095920] [2024-06-14 12:24:19,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487095920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:19,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:19,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:19,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750410894] [2024-06-14 12:24:19,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:19,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:19,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:19,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:19,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:19,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 307 transitions, 3485 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:19,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:19,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:19,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:20,082 INFO L124 PetriNetUnfolderBase]: 2456/3987 cut-off events. [2024-06-14 12:24:20,083 INFO L125 PetriNetUnfolderBase]: For 416429/416432 co-relation queries the response was YES. [2024-06-14 12:24:20,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36587 conditions, 3987 events. 2456/3987 cut-off events. For 416429/416432 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23267 event pairs, 560 based on Foata normal form. 5/3983 useless extension candidates. Maximal degree in co-relation 36478. Up to 3594 conditions per place. [2024-06-14 12:24:20,129 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 269 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-14 12:24:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 326 transitions, 4216 flow [2024-06-14 12:24:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:24:20,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:24:20,130 INFO L175 Difference]: Start difference. First operand has 240 places, 307 transitions, 3485 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:24:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 326 transitions, 4216 flow [2024-06-14 12:24:20,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 326 transitions, 4008 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:20,826 INFO L231 Difference]: Finished difference. Result has 241 places, 309 transitions, 3430 flow [2024-06-14 12:24:20,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3430, PETRI_PLACES=241, PETRI_TRANSITIONS=309} [2024-06-14 12:24:20,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 12:24:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 309 transitions, 3430 flow [2024-06-14 12:24:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:20,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:20,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:24:20,828 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1172030072, now seen corresponding path program 1 times [2024-06-14 12:24:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145023896] [2024-06-14 12:24:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:21,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:21,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145023896] [2024-06-14 12:24:21,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145023896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:21,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:21,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:24:21,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202950156] [2024-06-14 12:24:21,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:21,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:24:21,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:24:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:24:21,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:21,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 309 transitions, 3430 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:21,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:21,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:21,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:22,696 INFO L124 PetriNetUnfolderBase]: 2362/3858 cut-off events. [2024-06-14 12:24:22,697 INFO L125 PetriNetUnfolderBase]: For 417516/417548 co-relation queries the response was YES. [2024-06-14 12:24:22,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35601 conditions, 3858 events. 2362/3858 cut-off events. For 417516/417548 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22555 event pairs, 561 based on Foata normal form. 9/3836 useless extension candidates. Maximal degree in co-relation 35493. Up to 3409 conditions per place. [2024-06-14 12:24:22,744 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 243 selfloop transitions, 44 changer transitions 0/329 dead transitions. [2024-06-14 12:24:22,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 329 transitions, 4125 flow [2024-06-14 12:24:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:24:22,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:24:22,745 INFO L175 Difference]: Start difference. First operand has 241 places, 309 transitions, 3430 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:24:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 329 transitions, 4125 flow [2024-06-14 12:24:23,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 329 transitions, 3988 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:23,441 INFO L231 Difference]: Finished difference. Result has 244 places, 312 transitions, 3465 flow [2024-06-14 12:24:23,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3465, PETRI_PLACES=244, PETRI_TRANSITIONS=312} [2024-06-14 12:24:23,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 12:24:23,442 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 312 transitions, 3465 flow [2024-06-14 12:24:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:23,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:23,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:24:23,442 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2086302140, now seen corresponding path program 2 times [2024-06-14 12:24:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:23,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555994607] [2024-06-14 12:24:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:24,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:24,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555994607] [2024-06-14 12:24:24,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555994607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:24,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:24,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:24,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832033789] [2024-06-14 12:24:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:24,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:24,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:24,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 312 transitions, 3465 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:24,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:24,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:24,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:25,483 INFO L124 PetriNetUnfolderBase]: 2471/4015 cut-off events. [2024-06-14 12:24:25,483 INFO L125 PetriNetUnfolderBase]: For 430862/430869 co-relation queries the response was YES. [2024-06-14 12:24:25,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37219 conditions, 4015 events. 2471/4015 cut-off events. For 430862/430869 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23455 event pairs, 564 based on Foata normal form. 8/4014 useless extension candidates. Maximal degree in co-relation 37110. Up to 3579 conditions per place. [2024-06-14 12:24:25,528 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 269 selfloop transitions, 47 changer transitions 0/335 dead transitions. [2024-06-14 12:24:25,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 335 transitions, 4266 flow [2024-06-14 12:24:25,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:24:25,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:24:25,530 INFO L175 Difference]: Start difference. First operand has 244 places, 312 transitions, 3465 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:24:25,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 335 transitions, 4266 flow [2024-06-14 12:24:26,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 335 transitions, 4116 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:26,383 INFO L231 Difference]: Finished difference. Result has 246 places, 315 transitions, 3529 flow [2024-06-14 12:24:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3529, PETRI_PLACES=246, PETRI_TRANSITIONS=315} [2024-06-14 12:24:26,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 12:24:26,384 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 315 transitions, 3529 flow [2024-06-14 12:24:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:24:26,384 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:26,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 25137348, now seen corresponding path program 3 times [2024-06-14 12:24:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938569279] [2024-06-14 12:24:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938569279] [2024-06-14 12:24:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938569279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:27,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682058858] [2024-06-14 12:24:27,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:27,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:27,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:27,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:27,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 315 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:27,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:28,386 INFO L124 PetriNetUnfolderBase]: 2476/4022 cut-off events. [2024-06-14 12:24:28,387 INFO L125 PetriNetUnfolderBase]: For 446062/446069 co-relation queries the response was YES. [2024-06-14 12:24:28,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37786 conditions, 4022 events. 2476/4022 cut-off events. For 446062/446069 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23503 event pairs, 564 based on Foata normal form. 8/4021 useless extension candidates. Maximal degree in co-relation 37676. Up to 3573 conditions per place. [2024-06-14 12:24:28,432 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 264 selfloop transitions, 56 changer transitions 0/339 dead transitions. [2024-06-14 12:24:28,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 339 transitions, 4586 flow [2024-06-14 12:24:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:28,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:24:28,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:24:28,434 INFO L175 Difference]: Start difference. First operand has 246 places, 315 transitions, 3529 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:24:28,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 339 transitions, 4586 flow [2024-06-14 12:24:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 339 transitions, 4406 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:29,094 INFO L231 Difference]: Finished difference. Result has 248 places, 321 transitions, 3701 flow [2024-06-14 12:24:29,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3701, PETRI_PLACES=248, PETRI_TRANSITIONS=321} [2024-06-14 12:24:29,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-14 12:24:29,094 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 321 transitions, 3701 flow [2024-06-14 12:24:29,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:29,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:29,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:29,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:24:29,095 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:29,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1858400990, now seen corresponding path program 4 times [2024-06-14 12:24:29,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:29,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979129952] [2024-06-14 12:24:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:29,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979129952] [2024-06-14 12:24:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979129952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:29,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032540307] [2024-06-14 12:24:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:30,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:30,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 321 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:30,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:30,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:30,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:30,954 INFO L124 PetriNetUnfolderBase]: 2473/4018 cut-off events. [2024-06-14 12:24:30,954 INFO L125 PetriNetUnfolderBase]: For 459151/459158 co-relation queries the response was YES. [2024-06-14 12:24:30,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38074 conditions, 4018 events. 2473/4018 cut-off events. For 459151/459158 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23500 event pairs, 565 based on Foata normal form. 8/4017 useless extension candidates. Maximal degree in co-relation 37963. Up to 3582 conditions per place. [2024-06-14 12:24:31,000 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 281 selfloop transitions, 42 changer transitions 0/342 dead transitions. [2024-06-14 12:24:31,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 342 transitions, 4413 flow [2024-06-14 12:24:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:24:31,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:24:31,001 INFO L175 Difference]: Start difference. First operand has 248 places, 321 transitions, 3701 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:24:31,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 342 transitions, 4413 flow [2024-06-14 12:24:31,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 342 transitions, 4162 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:31,540 INFO L231 Difference]: Finished difference. Result has 252 places, 321 transitions, 3540 flow [2024-06-14 12:24:31,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=252, PETRI_TRANSITIONS=321} [2024-06-14 12:24:31,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:24:31,541 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 321 transitions, 3540 flow [2024-06-14 12:24:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:31,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:31,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:24:31,541 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:31,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:31,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2031254638, now seen corresponding path program 7 times [2024-06-14 12:24:31,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:31,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707118870] [2024-06-14 12:24:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:32,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707118870] [2024-06-14 12:24:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707118870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:32,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:32,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:32,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773259913] [2024-06-14 12:24:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:32,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:32,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:32,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 321 transitions, 3540 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:32,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:32,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:32,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:33,251 INFO L124 PetriNetUnfolderBase]: 2483/4031 cut-off events. [2024-06-14 12:24:33,252 INFO L125 PetriNetUnfolderBase]: For 471690/471693 co-relation queries the response was YES. [2024-06-14 12:24:33,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38322 conditions, 4031 events. 2483/4031 cut-off events. For 471690/471693 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23514 event pairs, 573 based on Foata normal form. 5/4027 useless extension candidates. Maximal degree in co-relation 38209. Up to 3564 conditions per place. [2024-06-14 12:24:33,300 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 46 changer transitions 0/345 dead transitions. [2024-06-14 12:24:33,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 345 transitions, 4358 flow [2024-06-14 12:24:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:24:33,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:24:33,305 INFO L175 Difference]: Start difference. First operand has 252 places, 321 transitions, 3540 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:24:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 345 transitions, 4358 flow [2024-06-14 12:24:34,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 345 transitions, 4246 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:34,040 INFO L231 Difference]: Finished difference. Result has 253 places, 324 transitions, 3632 flow [2024-06-14 12:24:34,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3632, PETRI_PLACES=253, PETRI_TRANSITIONS=324} [2024-06-14 12:24:34,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 12:24:34,041 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 324 transitions, 3632 flow [2024-06-14 12:24:34,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:34,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:34,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:34,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:24:34,042 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1161171988, now seen corresponding path program 4 times [2024-06-14 12:24:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502491882] [2024-06-14 12:24:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:34,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:34,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502491882] [2024-06-14 12:24:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502491882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:34,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127814353] [2024-06-14 12:24:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:34,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:34,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 324 transitions, 3632 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:34,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:34,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:34,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:35,800 INFO L124 PetriNetUnfolderBase]: 2567/4128 cut-off events. [2024-06-14 12:24:35,801 INFO L125 PetriNetUnfolderBase]: For 481371/481375 co-relation queries the response was YES. [2024-06-14 12:24:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38983 conditions, 4128 events. 2567/4128 cut-off events. For 481371/481375 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23788 event pairs, 594 based on Foata normal form. 6/4133 useless extension candidates. Maximal degree in co-relation 38869. Up to 3814 conditions per place. [2024-06-14 12:24:35,851 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 40 changer transitions 0/346 dead transitions. [2024-06-14 12:24:35,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 346 transitions, 4448 flow [2024-06-14 12:24:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:24:35,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:24:35,852 INFO L175 Difference]: Start difference. First operand has 253 places, 324 transitions, 3632 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:24:35,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 346 transitions, 4448 flow [2024-06-14 12:24:36,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 346 transitions, 4190 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-14 12:24:36,535 INFO L231 Difference]: Finished difference. Result has 252 places, 327 transitions, 3541 flow [2024-06-14 12:24:36,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=252, PETRI_TRANSITIONS=327} [2024-06-14 12:24:36,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-14 12:24:36,535 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 327 transitions, 3541 flow [2024-06-14 12:24:36,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:36,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:36,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:36,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:24:36,536 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:36,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1161172360, now seen corresponding path program 8 times [2024-06-14 12:24:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083143654] [2024-06-14 12:24:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:37,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:37,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083143654] [2024-06-14 12:24:37,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083143654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:37,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:37,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779539180] [2024-06-14 12:24:37,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:37,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:37,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:37,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:37,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 327 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:37,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:37,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:37,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:38,321 INFO L124 PetriNetUnfolderBase]: 2485/4037 cut-off events. [2024-06-14 12:24:38,321 INFO L125 PetriNetUnfolderBase]: For 487892/487895 co-relation queries the response was YES. [2024-06-14 12:24:38,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38291 conditions, 4037 events. 2485/4037 cut-off events. For 487892/487895 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23589 event pairs, 607 based on Foata normal form. 5/4033 useless extension candidates. Maximal degree in co-relation 38177. Up to 3542 conditions per place. [2024-06-14 12:24:38,368 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 274 selfloop transitions, 53 changer transitions 0/347 dead transitions. [2024-06-14 12:24:38,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 347 transitions, 4259 flow [2024-06-14 12:24:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:24:38,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:24:38,369 INFO L175 Difference]: Start difference. First operand has 252 places, 327 transitions, 3541 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:24:38,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 347 transitions, 4259 flow [2024-06-14 12:24:39,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 347 transitions, 4076 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:39,168 INFO L231 Difference]: Finished difference. Result has 254 places, 327 transitions, 3471 flow [2024-06-14 12:24:39,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=254, PETRI_TRANSITIONS=327} [2024-06-14 12:24:39,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:24:39,168 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 327 transitions, 3471 flow [2024-06-14 12:24:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:39,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:39,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:24:39,169 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:39,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:39,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2082183110, now seen corresponding path program 5 times [2024-06-14 12:24:39,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:39,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576492964] [2024-06-14 12:24:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576492964] [2024-06-14 12:24:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576492964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:40,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:40,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369496351] [2024-06-14 12:24:40,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:40,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:40,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:40,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 327 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:40,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:40,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:40,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:40,909 INFO L124 PetriNetUnfolderBase]: 2587/4158 cut-off events. [2024-06-14 12:24:40,909 INFO L125 PetriNetUnfolderBase]: For 502748/502752 co-relation queries the response was YES. [2024-06-14 12:24:40,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39277 conditions, 4158 events. 2587/4158 cut-off events. For 502748/502752 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24013 event pairs, 589 based on Foata normal form. 6/4163 useless extension candidates. Maximal degree in co-relation 39162. Up to 3760 conditions per place. [2024-06-14 12:24:40,965 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 285 selfloop transitions, 63 changer transitions 0/353 dead transitions. [2024-06-14 12:24:40,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 4728 flow [2024-06-14 12:24:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:24:40,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:24:40,966 INFO L175 Difference]: Start difference. First operand has 254 places, 327 transitions, 3471 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:24:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 4728 flow [2024-06-14 12:24:41,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 353 transitions, 4528 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:24:41,745 INFO L231 Difference]: Finished difference. Result has 256 places, 334 transitions, 3653 flow [2024-06-14 12:24:41,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3653, PETRI_PLACES=256, PETRI_TRANSITIONS=334} [2024-06-14 12:24:41,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 12:24:41,746 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 334 transitions, 3653 flow [2024-06-14 12:24:41,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:41,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:41,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:41,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:24:41,746 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:41,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2082183482, now seen corresponding path program 9 times [2024-06-14 12:24:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:41,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303887660] [2024-06-14 12:24:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303887660] [2024-06-14 12:24:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303887660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:42,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:42,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114951736] [2024-06-14 12:24:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:42,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:42,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 334 transitions, 3653 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:42,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:42,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:42,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:43,512 INFO L124 PetriNetUnfolderBase]: 2522/4100 cut-off events. [2024-06-14 12:24:43,512 INFO L125 PetriNetUnfolderBase]: For 527456/527461 co-relation queries the response was YES. [2024-06-14 12:24:43,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39778 conditions, 4100 events. 2522/4100 cut-off events. For 527456/527461 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24146 event pairs, 604 based on Foata normal form. 7/4089 useless extension candidates. Maximal degree in co-relation 39661. Up to 3515 conditions per place. [2024-06-14 12:24:43,559 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 77 changer transitions 0/354 dead transitions. [2024-06-14 12:24:43,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 354 transitions, 4498 flow [2024-06-14 12:24:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:24:43,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:24:43,560 INFO L175 Difference]: Start difference. First operand has 256 places, 334 transitions, 3653 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:24:43,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 354 transitions, 4498 flow [2024-06-14 12:24:44,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 354 transitions, 4344 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:44,246 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 3793 flow [2024-06-14 12:24:44,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-14 12:24:44,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 12:24:44,246 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 3793 flow [2024-06-14 12:24:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:44,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:44,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:44,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:24:44,247 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -806493238, now seen corresponding path program 6 times [2024-06-14 12:24:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:44,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453727438] [2024-06-14 12:24:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:44,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:45,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:45,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453727438] [2024-06-14 12:24:45,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453727438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:45,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279470609] [2024-06-14 12:24:45,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:45,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:45,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 3793 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:45,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:45,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:45,964 INFO L124 PetriNetUnfolderBase]: 2591/4170 cut-off events. [2024-06-14 12:24:45,964 INFO L125 PetriNetUnfolderBase]: For 532022/532026 co-relation queries the response was YES. [2024-06-14 12:24:45,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40452 conditions, 4170 events. 2591/4170 cut-off events. For 532022/532026 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24114 event pairs, 624 based on Foata normal form. 6/4175 useless extension candidates. Maximal degree in co-relation 40333. Up to 3769 conditions per place. [2024-06-14 12:24:46,010 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 68 changer transitions 0/355 dead transitions. [2024-06-14 12:24:46,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 355 transitions, 4698 flow [2024-06-14 12:24:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:24:46,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:24:46,011 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 3793 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:24:46,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 355 transitions, 4698 flow [2024-06-14 12:24:47,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 355 transitions, 4372 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:47,013 INFO L231 Difference]: Finished difference. Result has 263 places, 337 transitions, 3609 flow [2024-06-14 12:24:47,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=263, PETRI_TRANSITIONS=337} [2024-06-14 12:24:47,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-14 12:24:47,014 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 337 transitions, 3609 flow [2024-06-14 12:24:47,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:47,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:47,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:24:47,014 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:47,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash 541003994, now seen corresponding path program 10 times [2024-06-14 12:24:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:47,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564692675] [2024-06-14 12:24:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:47,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:47,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564692675] [2024-06-14 12:24:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564692675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:47,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829778465] [2024-06-14 12:24:47,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:48,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:48,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 337 transitions, 3609 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:48,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:48,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:48,861 INFO L124 PetriNetUnfolderBase]: 2548/4152 cut-off events. [2024-06-14 12:24:48,861 INFO L125 PetriNetUnfolderBase]: For 562906/562913 co-relation queries the response was YES. [2024-06-14 12:24:48,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 4152 events. 2548/4152 cut-off events. For 562906/562913 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24615 event pairs, 631 based on Foata normal form. 9/4139 useless extension candidates. Maximal degree in co-relation 40986. Up to 3422 conditions per place. [2024-06-14 12:24:48,906 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 122 changer transitions 0/363 dead transitions. [2024-06-14 12:24:48,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 363 transitions, 5197 flow [2024-06-14 12:24:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:24:48,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:24:48,908 INFO L175 Difference]: Start difference. First operand has 263 places, 337 transitions, 3609 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:24:48,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 363 transitions, 5197 flow [2024-06-14 12:24:49,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 363 transitions, 5071 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:49,916 INFO L231 Difference]: Finished difference. Result has 265 places, 346 transitions, 4141 flow [2024-06-14 12:24:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4141, PETRI_PLACES=265, PETRI_TRANSITIONS=346} [2024-06-14 12:24:49,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 12:24:49,916 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 346 transitions, 4141 flow [2024-06-14 12:24:49,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:49,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:49,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:49,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:24:49,916 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:49,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash -647698904, now seen corresponding path program 7 times [2024-06-14 12:24:49,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:49,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923114118] [2024-06-14 12:24:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:49,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923114118] [2024-06-14 12:24:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923114118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:50,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:50,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462508585] [2024-06-14 12:24:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:50,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:50,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:50,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:50,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:50,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 346 transitions, 4141 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:50,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:50,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:51,803 INFO L124 PetriNetUnfolderBase]: 2659/4280 cut-off events. [2024-06-14 12:24:51,803 INFO L125 PetriNetUnfolderBase]: For 588832/588838 co-relation queries the response was YES. [2024-06-14 12:24:51,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42954 conditions, 4280 events. 2659/4280 cut-off events. For 588832/588838 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24942 event pairs, 594 based on Foata normal form. 8/4287 useless extension candidates. Maximal degree in co-relation 42833. Up to 3720 conditions per place. [2024-06-14 12:24:51,853 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 264 selfloop transitions, 107 changer transitions 0/376 dead transitions. [2024-06-14 12:24:51,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 376 transitions, 5737 flow [2024-06-14 12:24:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:24:51,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:24:51,855 INFO L175 Difference]: Start difference. First operand has 265 places, 346 transitions, 4141 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:24:51,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 376 transitions, 5737 flow [2024-06-14 12:24:52,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 376 transitions, 5357 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:52,821 INFO L231 Difference]: Finished difference. Result has 270 places, 359 transitions, 4365 flow [2024-06-14 12:24:52,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4365, PETRI_PLACES=270, PETRI_TRANSITIONS=359} [2024-06-14 12:24:52,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-14 12:24:52,821 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 359 transitions, 4365 flow [2024-06-14 12:24:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:52,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:52,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:24:52,822 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:52,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2135360168, now seen corresponding path program 8 times [2024-06-14 12:24:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:52,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67080118] [2024-06-14 12:24:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:53,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:53,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67080118] [2024-06-14 12:24:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67080118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:53,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:53,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:53,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5696362] [2024-06-14 12:24:53,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:53,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:53,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 359 transitions, 4365 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:53,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:53,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:53,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:54,731 INFO L124 PetriNetUnfolderBase]: 2685/4318 cut-off events. [2024-06-14 12:24:54,731 INFO L125 PetriNetUnfolderBase]: For 604526/604532 co-relation queries the response was YES. [2024-06-14 12:24:54,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43504 conditions, 4318 events. 2685/4318 cut-off events. For 604526/604532 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25171 event pairs, 630 based on Foata normal form. 8/4325 useless extension candidates. Maximal degree in co-relation 43381. Up to 3745 conditions per place. [2024-06-14 12:24:54,789 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 251 selfloop transitions, 125 changer transitions 0/381 dead transitions. [2024-06-14 12:24:54,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 381 transitions, 5698 flow [2024-06-14 12:24:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:54,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:24:54,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:24:54,790 INFO L175 Difference]: Start difference. First operand has 270 places, 359 transitions, 4365 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:24:54,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 381 transitions, 5698 flow [2024-06-14 12:24:55,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 381 transitions, 5398 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:55,736 INFO L231 Difference]: Finished difference. Result has 275 places, 365 transitions, 4544 flow [2024-06-14 12:24:55,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4121, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4544, PETRI_PLACES=275, PETRI_TRANSITIONS=365} [2024-06-14 12:24:55,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 12:24:55,737 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 365 transitions, 4544 flow [2024-06-14 12:24:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:55,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:55,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:55,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:24:55,737 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:55,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash 541241516, now seen corresponding path program 9 times [2024-06-14 12:24:55,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:55,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556993842] [2024-06-14 12:24:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:55,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:56,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:56,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556993842] [2024-06-14 12:24:56,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556993842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:56,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:56,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402118616] [2024-06-14 12:24:56,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:56,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:56,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:24:56,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 365 transitions, 4544 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:56,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:56,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:24:56,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:57,593 INFO L124 PetriNetUnfolderBase]: 2679/4312 cut-off events. [2024-06-14 12:24:57,593 INFO L125 PetriNetUnfolderBase]: For 607403/607409 co-relation queries the response was YES. [2024-06-14 12:24:57,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43456 conditions, 4312 events. 2679/4312 cut-off events. For 607403/607409 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25140 event pairs, 638 based on Foata normal form. 8/4319 useless extension candidates. Maximal degree in co-relation 43331. Up to 3740 conditions per place. [2024-06-14 12:24:57,645 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 114 changer transitions 0/382 dead transitions. [2024-06-14 12:24:57,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 382 transitions, 5820 flow [2024-06-14 12:24:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:24:57,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:24:57,646 INFO L175 Difference]: Start difference. First operand has 275 places, 365 transitions, 4544 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:24:57,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 382 transitions, 5820 flow [2024-06-14 12:24:58,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 382 transitions, 5501 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:58,674 INFO L231 Difference]: Finished difference. Result has 279 places, 365 transitions, 4459 flow [2024-06-14 12:24:58,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4459, PETRI_PLACES=279, PETRI_TRANSITIONS=365} [2024-06-14 12:24:58,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:24:58,674 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 365 transitions, 4459 flow [2024-06-14 12:24:58,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:58,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:58,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:24:58,675 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:24:58,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1735505366, now seen corresponding path program 11 times [2024-06-14 12:24:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933427129] [2024-06-14 12:24:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:59,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933427129] [2024-06-14 12:24:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933427129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:59,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:59,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066991618] [2024-06-14 12:24:59,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:59,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:59,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:24:59,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 365 transitions, 4459 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:59,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:59,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:24:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:00,651 INFO L124 PetriNetUnfolderBase]: 2599/4211 cut-off events. [2024-06-14 12:25:00,652 INFO L125 PetriNetUnfolderBase]: For 614415/614415 co-relation queries the response was YES. [2024-06-14 12:25:00,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42854 conditions, 4211 events. 2599/4211 cut-off events. For 614415/614415 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24694 event pairs, 629 based on Foata normal form. 2/4208 useless extension candidates. Maximal degree in co-relation 42728. Up to 3756 conditions per place. [2024-06-14 12:25:00,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 43 changer transitions 0/377 dead transitions. [2024-06-14 12:25:00,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 377 transitions, 5190 flow [2024-06-14 12:25:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:25:00,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:25:00,704 INFO L175 Difference]: Start difference. First operand has 279 places, 365 transitions, 4459 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:25:00,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 377 transitions, 5190 flow [2024-06-14 12:25:01,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 377 transitions, 4814 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:01,876 INFO L231 Difference]: Finished difference. Result has 280 places, 365 transitions, 4175 flow [2024-06-14 12:25:01,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4175, PETRI_PLACES=280, PETRI_TRANSITIONS=365} [2024-06-14 12:25:01,877 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 12:25:01,877 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 365 transitions, 4175 flow [2024-06-14 12:25:01,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:01,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:01,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:01,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:25:01,877 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:01,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2141074088, now seen corresponding path program 10 times [2024-06-14 12:25:01,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:01,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570282395] [2024-06-14 12:25:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:01,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:02,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570282395] [2024-06-14 12:25:02,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570282395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:02,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:02,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:02,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569890321] [2024-06-14 12:25:02,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:02,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:02,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:25:02,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 365 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:02,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:25:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:03,798 INFO L124 PetriNetUnfolderBase]: 2683/4316 cut-off events. [2024-06-14 12:25:03,798 INFO L125 PetriNetUnfolderBase]: For 623533/623539 co-relation queries the response was YES. [2024-06-14 12:25:03,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43054 conditions, 4316 events. 2683/4316 cut-off events. For 623533/623539 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25163 event pairs, 625 based on Foata normal form. 8/4323 useless extension candidates. Maximal degree in co-relation 42927. Up to 3742 conditions per place. [2024-06-14 12:25:03,849 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 250 selfloop transitions, 128 changer transitions 0/383 dead transitions. [2024-06-14 12:25:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 383 transitions, 5223 flow [2024-06-14 12:25:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:25:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:25:03,850 INFO L175 Difference]: Start difference. First operand has 280 places, 365 transitions, 4175 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:25:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 383 transitions, 5223 flow [2024-06-14 12:25:04,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 383 transitions, 5057 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:25:04,882 INFO L231 Difference]: Finished difference. Result has 279 places, 368 transitions, 4357 flow [2024-06-14 12:25:04,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4357, PETRI_PLACES=279, PETRI_TRANSITIONS=368} [2024-06-14 12:25:04,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:25:04,883 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 368 transitions, 4357 flow [2024-06-14 12:25:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:04,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:04,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:25:04,883 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1912757228, now seen corresponding path program 11 times [2024-06-14 12:25:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287763330] [2024-06-14 12:25:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:05,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:05,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287763330] [2024-06-14 12:25:05,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287763330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:05,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:05,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133923959] [2024-06-14 12:25:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:05,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:05,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:25:05,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 368 transitions, 4357 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:05,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:05,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:25:05,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:06,757 INFO L124 PetriNetUnfolderBase]: 2677/4310 cut-off events. [2024-06-14 12:25:06,757 INFO L125 PetriNetUnfolderBase]: For 630339/630345 co-relation queries the response was YES. [2024-06-14 12:25:06,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43218 conditions, 4310 events. 2677/4310 cut-off events. For 630339/630345 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25159 event pairs, 645 based on Foata normal form. 8/4317 useless extension candidates. Maximal degree in co-relation 43091. Up to 3737 conditions per place. [2024-06-14 12:25:06,808 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 261 selfloop transitions, 120 changer transitions 0/386 dead transitions. [2024-06-14 12:25:06,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 386 transitions, 5541 flow [2024-06-14 12:25:06,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:25:06,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:25:06,809 INFO L175 Difference]: Start difference. First operand has 279 places, 368 transitions, 4357 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:25:06,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 386 transitions, 5541 flow [2024-06-14 12:25:07,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 386 transitions, 5203 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:07,973 INFO L231 Difference]: Finished difference. Result has 282 places, 370 transitions, 4313 flow [2024-06-14 12:25:07,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4313, PETRI_PLACES=282, PETRI_TRANSITIONS=370} [2024-06-14 12:25:07,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 12:25:07,974 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 370 transitions, 4313 flow [2024-06-14 12:25:07,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:07,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:07,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:07,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:25:07,975 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:07,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1913172938, now seen corresponding path program 12 times [2024-06-14 12:25:07,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:07,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785292260] [2024-06-14 12:25:07,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:07,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:08,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:08,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785292260] [2024-06-14 12:25:08,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785292260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:08,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:08,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999511285] [2024-06-14 12:25:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:08,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:08,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:25:08,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 370 transitions, 4313 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:08,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:08,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:25:08,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:09,779 INFO L124 PetriNetUnfolderBase]: 2671/4304 cut-off events. [2024-06-14 12:25:09,779 INFO L125 PetriNetUnfolderBase]: For 635459/635465 co-relation queries the response was YES. [2024-06-14 12:25:09,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42976 conditions, 4304 events. 2671/4304 cut-off events. For 635459/635465 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25179 event pairs, 643 based on Foata normal form. 8/4311 useless extension candidates. Maximal degree in co-relation 42848. Up to 3732 conditions per place. [2024-06-14 12:25:09,832 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 123 changer transitions 0/385 dead transitions. [2024-06-14 12:25:09,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 385 transitions, 5283 flow [2024-06-14 12:25:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:25:09,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:25:09,833 INFO L175 Difference]: Start difference. First operand has 282 places, 370 transitions, 4313 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:25:09,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 385 transitions, 5283 flow [2024-06-14 12:25:10,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 385 transitions, 5029 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:10,861 INFO L231 Difference]: Finished difference. Result has 286 places, 370 transitions, 4311 flow [2024-06-14 12:25:10,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4311, PETRI_PLACES=286, PETRI_TRANSITIONS=370} [2024-06-14 12:25:10,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 12:25:10,861 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 370 transitions, 4311 flow [2024-06-14 12:25:10,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:10,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:10,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:10,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:25:10,862 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:10,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1912756856, now seen corresponding path program 12 times [2024-06-14 12:25:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994957376] [2024-06-14 12:25:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:11,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:11,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994957376] [2024-06-14 12:25:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994957376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:11,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:11,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:11,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320257689] [2024-06-14 12:25:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:11,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:11,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:11,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:11,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:11,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:11,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 370 transitions, 4311 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:11,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:11,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:11,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:12,702 INFO L124 PetriNetUnfolderBase]: 2585/4216 cut-off events. [2024-06-14 12:25:12,702 INFO L125 PetriNetUnfolderBase]: For 648955/648959 co-relation queries the response was YES. [2024-06-14 12:25:12,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42534 conditions, 4216 events. 2585/4216 cut-off events. For 648955/648959 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 25139 event pairs, 640 based on Foata normal form. 6/4204 useless extension candidates. Maximal degree in co-relation 42405. Up to 3469 conditions per place. [2024-06-14 12:25:12,754 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 127 changer transitions 0/385 dead transitions. [2024-06-14 12:25:12,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 385 transitions, 5233 flow [2024-06-14 12:25:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:25:12,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:25:12,755 INFO L175 Difference]: Start difference. First operand has 286 places, 370 transitions, 4311 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:25:12,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 385 transitions, 5233 flow [2024-06-14 12:25:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 385 transitions, 4897 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:14,142 INFO L231 Difference]: Finished difference. Result has 287 places, 370 transitions, 4235 flow [2024-06-14 12:25:14,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4235, PETRI_PLACES=287, PETRI_TRANSITIONS=370} [2024-06-14 12:25:14,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 12:25:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 370 transitions, 4235 flow [2024-06-14 12:25:14,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:14,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:14,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:14,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:25:14,143 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:14,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1781290132, now seen corresponding path program 4 times [2024-06-14 12:25:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914860744] [2024-06-14 12:25:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:14,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:15,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:15,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914860744] [2024-06-14 12:25:15,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914860744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:15,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:15,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114465632] [2024-06-14 12:25:15,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:15,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:15,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:15,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:15,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:15,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:15,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 370 transitions, 4235 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:15,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:15,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:15,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:16,062 INFO L124 PetriNetUnfolderBase]: 2588/4200 cut-off events. [2024-06-14 12:25:16,062 INFO L125 PetriNetUnfolderBase]: For 647572/647572 co-relation queries the response was YES. [2024-06-14 12:25:16,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42244 conditions, 4200 events. 2588/4200 cut-off events. For 647572/647572 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24746 event pairs, 592 based on Foata normal form. 2/4197 useless extension candidates. Maximal degree in co-relation 42114. Up to 3741 conditions per place. [2024-06-14 12:25:16,112 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 312 selfloop transitions, 42 changer transitions 0/384 dead transitions. [2024-06-14 12:25:16,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 384 transitions, 5056 flow [2024-06-14 12:25:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:25:16,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:25:16,113 INFO L175 Difference]: Start difference. First operand has 287 places, 370 transitions, 4235 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:25:16,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 384 transitions, 5056 flow [2024-06-14 12:25:17,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 384 transitions, 4764 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:17,263 INFO L231 Difference]: Finished difference. Result has 288 places, 372 transitions, 4116 flow [2024-06-14 12:25:17,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4116, PETRI_PLACES=288, PETRI_TRANSITIONS=372} [2024-06-14 12:25:17,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 12:25:17,263 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 372 transitions, 4116 flow [2024-06-14 12:25:17,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:17,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:17,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:17,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:25:17,264 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:17,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2145788630, now seen corresponding path program 2 times [2024-06-14 12:25:17,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:17,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801525107] [2024-06-14 12:25:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:17,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:18,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801525107] [2024-06-14 12:25:18,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801525107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:18,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:18,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:18,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256550782] [2024-06-14 12:25:18,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:18,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:18,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:18,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 372 transitions, 4116 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:18,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:18,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:18,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:19,387 INFO L124 PetriNetUnfolderBase]: 2477/4046 cut-off events. [2024-06-14 12:25:19,387 INFO L125 PetriNetUnfolderBase]: For 669943/669984 co-relation queries the response was YES. [2024-06-14 12:25:19,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41035 conditions, 4046 events. 2477/4046 cut-off events. For 669943/669984 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24055 event pairs, 622 based on Foata normal form. 7/4011 useless extension candidates. Maximal degree in co-relation 40904. Up to 3503 conditions per place. [2024-06-14 12:25:19,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 81 changer transitions 0/395 dead transitions. [2024-06-14 12:25:19,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 395 transitions, 5419 flow [2024-06-14 12:25:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:25:19,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:25:19,441 INFO L175 Difference]: Start difference. First operand has 288 places, 372 transitions, 4116 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:25:19,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 395 transitions, 5419 flow [2024-06-14 12:25:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 395 transitions, 5256 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:20,562 INFO L231 Difference]: Finished difference. Result has 291 places, 381 transitions, 4373 flow [2024-06-14 12:25:20,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4373, PETRI_PLACES=291, PETRI_TRANSITIONS=381} [2024-06-14 12:25:20,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:25:20,563 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 381 transitions, 4373 flow [2024-06-14 12:25:20,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:20,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:20,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:25:20,563 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:20,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2145774680, now seen corresponding path program 3 times [2024-06-14 12:25:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:20,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054809700] [2024-06-14 12:25:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:21,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054809700] [2024-06-14 12:25:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054809700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:21,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:21,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:21,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109109232] [2024-06-14 12:25:21,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:21,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:21,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:21,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 381 transitions, 4373 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:21,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:21,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:22,685 INFO L124 PetriNetUnfolderBase]: 2471/4046 cut-off events. [2024-06-14 12:25:22,685 INFO L125 PetriNetUnfolderBase]: For 672844/672860 co-relation queries the response was YES. [2024-06-14 12:25:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40936 conditions, 4046 events. 2471/4046 cut-off events. For 672844/672860 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24137 event pairs, 642 based on Foata normal form. 6/4014 useless extension candidates. Maximal degree in co-relation 40804. Up to 3614 conditions per place. [2024-06-14 12:25:22,737 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 314 selfloop transitions, 21 changer transitions 0/392 dead transitions. [2024-06-14 12:25:22,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 392 transitions, 5071 flow [2024-06-14 12:25:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:25:22,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:25:22,739 INFO L175 Difference]: Start difference. First operand has 291 places, 381 transitions, 4373 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:25:22,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 392 transitions, 5071 flow [2024-06-14 12:25:23,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 392 transitions, 4844 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:23,748 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 4194 flow [2024-06-14 12:25:23,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4194, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2024-06-14 12:25:23,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 12:25:23,748 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 4194 flow [2024-06-14 12:25:23,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:23,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:23,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:23,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:25:23,749 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:23,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1735871786, now seen corresponding path program 4 times [2024-06-14 12:25:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:23,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102634484] [2024-06-14 12:25:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:23,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:24,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:24,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102634484] [2024-06-14 12:25:24,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102634484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:24,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936503279] [2024-06-14 12:25:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:24,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:24,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:24,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:24,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 4194 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:24,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:24,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:24,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:25,656 INFO L124 PetriNetUnfolderBase]: 2476/4047 cut-off events. [2024-06-14 12:25:25,656 INFO L125 PetriNetUnfolderBase]: For 685231/685276 co-relation queries the response was YES. [2024-06-14 12:25:25,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40994 conditions, 4047 events. 2476/4047 cut-off events. For 685231/685276 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24075 event pairs, 619 based on Foata normal form. 7/4012 useless extension candidates. Maximal degree in co-relation 40860. Up to 3504 conditions per place. [2024-06-14 12:25:25,706 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 74 changer transitions 0/397 dead transitions. [2024-06-14 12:25:25,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 397 transitions, 5165 flow [2024-06-14 12:25:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:25,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:25:25,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:25:25,707 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 4194 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:25:25,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 397 transitions, 5165 flow [2024-06-14 12:25:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 397 transitions, 5115 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:26,751 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 4378 flow [2024-06-14 12:25:26,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4378, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-14 12:25:26,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 12:25:26,752 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 4378 flow [2024-06-14 12:25:26,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:26,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:26,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:25:26,752 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:26,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 940747754, now seen corresponding path program 5 times [2024-06-14 12:25:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:26,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093592915] [2024-06-14 12:25:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:26,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:27,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093592915] [2024-06-14 12:25:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093592915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:27,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:27,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331386] [2024-06-14 12:25:27,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:27,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:27,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:27,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:27,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:27,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:28,692 INFO L124 PetriNetUnfolderBase]: 2472/4040 cut-off events. [2024-06-14 12:25:28,692 INFO L125 PetriNetUnfolderBase]: For 691113/691146 co-relation queries the response was YES. [2024-06-14 12:25:28,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41042 conditions, 4040 events. 2472/4040 cut-off events. For 691113/691146 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24064 event pairs, 618 based on Foata normal form. 7/4006 useless extension candidates. Maximal degree in co-relation 40907. Up to 3501 conditions per place. [2024-06-14 12:25:28,743 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 259 selfloop transitions, 80 changer transitions 0/396 dead transitions. [2024-06-14 12:25:28,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 396 transitions, 5089 flow [2024-06-14 12:25:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:25:28,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:25:28,744 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 4378 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:25:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 396 transitions, 5089 flow [2024-06-14 12:25:29,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 396 transitions, 4838 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:29,775 INFO L231 Difference]: Finished difference. Result has 300 places, 384 transitions, 4293 flow [2024-06-14 12:25:29,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4293, PETRI_PLACES=300, PETRI_TRANSITIONS=384} [2024-06-14 12:25:29,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 12:25:29,776 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 384 transitions, 4293 flow [2024-06-14 12:25:29,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:29,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:29,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:25:29,776 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:29,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 19921532, now seen corresponding path program 13 times [2024-06-14 12:25:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056604803] [2024-06-14 12:25:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056604803] [2024-06-14 12:25:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056604803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:30,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284965815] [2024-06-14 12:25:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:30,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:30,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 384 transitions, 4293 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:30,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:30,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:30,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:31,689 INFO L124 PetriNetUnfolderBase]: 2699/4376 cut-off events. [2024-06-14 12:25:31,689 INFO L125 PetriNetUnfolderBase]: For 712637/712639 co-relation queries the response was YES. [2024-06-14 12:25:31,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43615 conditions, 4376 events. 2699/4376 cut-off events. For 712637/712639 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25918 event pairs, 622 based on Foata normal form. 4/4375 useless extension candidates. Maximal degree in co-relation 43479. Up to 3867 conditions per place. [2024-06-14 12:25:31,752 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 61 changer transitions 0/450 dead transitions. [2024-06-14 12:25:31,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 450 transitions, 5634 flow [2024-06-14 12:25:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:25:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:25:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-14 12:25:31,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-14 12:25:31,753 INFO L175 Difference]: Start difference. First operand has 300 places, 384 transitions, 4293 flow. Second operand 11 states and 211 transitions. [2024-06-14 12:25:31,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 450 transitions, 5634 flow [2024-06-14 12:25:32,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 450 transitions, 5398 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:25:32,831 INFO L231 Difference]: Finished difference. Result has 305 places, 416 transitions, 4665 flow [2024-06-14 12:25:32,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4665, PETRI_PLACES=305, PETRI_TRANSITIONS=416} [2024-06-14 12:25:32,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 12:25:32,832 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 416 transitions, 4665 flow [2024-06-14 12:25:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:32,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:32,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:25:32,832 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:32,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1697471348, now seen corresponding path program 14 times [2024-06-14 12:25:32,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:32,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186657295] [2024-06-14 12:25:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186657295] [2024-06-14 12:25:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186657295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:33,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:33,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:33,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694915529] [2024-06-14 12:25:33,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:33,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:33,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:33,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:33,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:33,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 416 transitions, 4665 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:33,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:33,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:33,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:34,817 INFO L124 PetriNetUnfolderBase]: 2771/4492 cut-off events. [2024-06-14 12:25:34,817 INFO L125 PetriNetUnfolderBase]: For 720585/720587 co-relation queries the response was YES. [2024-06-14 12:25:34,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44682 conditions, 4492 events. 2771/4492 cut-off events. For 720585/720587 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26735 event pairs, 625 based on Foata normal form. 4/4491 useless extension candidates. Maximal degree in co-relation 44542. Up to 3963 conditions per place. [2024-06-14 12:25:34,877 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 374 selfloop transitions, 73 changer transitions 0/477 dead transitions. [2024-06-14 12:25:34,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 477 transitions, 6126 flow [2024-06-14 12:25:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:25:34,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-14 12:25:34,878 INFO L175 Difference]: Start difference. First operand has 305 places, 416 transitions, 4665 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:25:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 477 transitions, 6126 flow [2024-06-14 12:25:36,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 477 transitions, 5748 flow, removed 125 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:36,214 INFO L231 Difference]: Finished difference. Result has 311 places, 449 transitions, 5021 flow [2024-06-14 12:25:36,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4407, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5021, PETRI_PLACES=311, PETRI_TRANSITIONS=449} [2024-06-14 12:25:36,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 12:25:36,215 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 449 transitions, 5021 flow [2024-06-14 12:25:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:36,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:36,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:25:36,215 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash 256138348, now seen corresponding path program 13 times [2024-06-14 12:25:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342785884] [2024-06-14 12:25:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342785884] [2024-06-14 12:25:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342785884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:37,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:37,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694684846] [2024-06-14 12:25:37,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:37,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:37,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:37,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:25:37,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 449 transitions, 5021 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:37,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:37,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:25:37,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:38,074 INFO L124 PetriNetUnfolderBase]: 2864/4598 cut-off events. [2024-06-14 12:25:38,074 INFO L125 PetriNetUnfolderBase]: For 720322/720326 co-relation queries the response was YES. [2024-06-14 12:25:38,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45025 conditions, 4598 events. 2864/4598 cut-off events. For 720322/720326 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27089 event pairs, 669 based on Foata normal form. 6/4603 useless extension candidates. Maximal degree in co-relation 44882. Up to 4229 conditions per place. [2024-06-14 12:25:38,136 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 427 selfloop transitions, 50 changer transitions 0/482 dead transitions. [2024-06-14 12:25:38,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 482 transitions, 6216 flow [2024-06-14 12:25:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:25:38,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:25:38,137 INFO L175 Difference]: Start difference. First operand has 311 places, 449 transitions, 5021 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:25:38,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 482 transitions, 6216 flow [2024-06-14 12:25:39,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 482 transitions, 6047 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:39,736 INFO L231 Difference]: Finished difference. Result has 317 places, 458 transitions, 5139 flow [2024-06-14 12:25:39,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5139, PETRI_PLACES=317, PETRI_TRANSITIONS=458} [2024-06-14 12:25:39,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:25:39,737 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 458 transitions, 5139 flow [2024-06-14 12:25:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:39,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:39,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:39,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:25:39,737 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:39,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1838155048, now seen corresponding path program 1 times [2024-06-14 12:25:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253734872] [2024-06-14 12:25:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253734872] [2024-06-14 12:25:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253734872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:40,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:40,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:40,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902240409] [2024-06-14 12:25:40,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:40,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:40,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:40,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:25:40,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 458 transitions, 5139 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:40,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:40,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:25:40,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:41,947 INFO L124 PetriNetUnfolderBase]: 2670/4394 cut-off events. [2024-06-14 12:25:41,947 INFO L125 PetriNetUnfolderBase]: For 734320/734320 co-relation queries the response was YES. [2024-06-14 12:25:41,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43940 conditions, 4394 events. 2670/4394 cut-off events. For 734320/734320 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26689 event pairs, 604 based on Foata normal form. 2/4377 useless extension candidates. Maximal degree in co-relation 43795. Up to 3858 conditions per place. [2024-06-14 12:25:42,009 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 428 selfloop transitions, 16 changer transitions 0/481 dead transitions. [2024-06-14 12:25:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 481 transitions, 6181 flow [2024-06-14 12:25:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:25:42,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:25:42,010 INFO L175 Difference]: Start difference. First operand has 317 places, 458 transitions, 5139 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:25:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 481 transitions, 6181 flow [2024-06-14 12:25:43,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 481 transitions, 5935 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 12:25:43,640 INFO L231 Difference]: Finished difference. Result has 315 places, 460 transitions, 5012 flow [2024-06-14 12:25:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5012, PETRI_PLACES=315, PETRI_TRANSITIONS=460} [2024-06-14 12:25:43,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 12:25:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 460 transitions, 5012 flow [2024-06-14 12:25:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:43,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:25:43,641 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:43,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash 2094942398, now seen corresponding path program 2 times [2024-06-14 12:25:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:43,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389391639] [2024-06-14 12:25:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:44,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:44,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389391639] [2024-06-14 12:25:44,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389391639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:44,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:44,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140144973] [2024-06-14 12:25:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:25:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 460 transitions, 5012 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:25:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:45,795 INFO L124 PetriNetUnfolderBase]: 2678/4406 cut-off events. [2024-06-14 12:25:45,795 INFO L125 PetriNetUnfolderBase]: For 743924/743924 co-relation queries the response was YES. [2024-06-14 12:25:45,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43731 conditions, 4406 events. 2678/4406 cut-off events. For 743924/743924 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26823 event pairs, 640 based on Foata normal form. 2/4389 useless extension candidates. Maximal degree in co-relation 43586. Up to 3887 conditions per place. [2024-06-14 12:25:45,858 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 425 selfloop transitions, 17 changer transitions 0/479 dead transitions. [2024-06-14 12:25:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 479 transitions, 6038 flow [2024-06-14 12:25:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:25:45,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 12:25:45,859 INFO L175 Difference]: Start difference. First operand has 315 places, 460 transitions, 5012 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:25:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 479 transitions, 6038 flow [2024-06-14 12:25:48,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 479 transitions, 5935 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:48,419 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 5034 flow [2024-06-14 12:25:48,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5034, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-14 12:25:48,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:25:48,420 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 5034 flow [2024-06-14 12:25:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:48,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:48,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:25:48,421 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:48,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -921949266, now seen corresponding path program 1 times [2024-06-14 12:25:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243843089] [2024-06-14 12:25:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:49,538 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 12:25:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243843089] [2024-06-14 12:25:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243843089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:49,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821195991] [2024-06-14 12:25:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:49,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:49,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:25:49,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:49,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:49,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:25:49,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:50,574 INFO L124 PetriNetUnfolderBase]: 2744/4474 cut-off events. [2024-06-14 12:25:50,574 INFO L125 PetriNetUnfolderBase]: For 747540/747540 co-relation queries the response was YES. [2024-06-14 12:25:50,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 4474 events. 2744/4474 cut-off events. For 747540/747540 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26858 event pairs, 668 based on Foata normal form. 2/4461 useless extension candidates. Maximal degree in co-relation 43726. Up to 4087 conditions per place. [2024-06-14 12:25:50,737 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 449 selfloop transitions, 22 changer transitions 0/482 dead transitions. [2024-06-14 12:25:50,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 482 transitions, 6138 flow [2024-06-14 12:25:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:25:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:25:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:25:50,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 12:25:50,738 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 5034 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:25:50,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 482 transitions, 6138 flow [2024-06-14 12:25:53,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 482 transitions, 6029 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:53,058 INFO L231 Difference]: Finished difference. Result has 321 places, 465 transitions, 5083 flow [2024-06-14 12:25:53,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5083, PETRI_PLACES=321, PETRI_TRANSITIONS=465} [2024-06-14 12:25:53,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 12:25:53,058 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 465 transitions, 5083 flow [2024-06-14 12:25:53,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:53,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:53,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:25:53,058 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:53,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash -806663056, now seen corresponding path program 3 times [2024-06-14 12:25:53,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:53,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708063463] [2024-06-14 12:25:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:54,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:54,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708063463] [2024-06-14 12:25:54,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708063463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:54,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:54,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:54,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885767945] [2024-06-14 12:25:54,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:54,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:54,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:54,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:54,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:25:54,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 465 transitions, 5083 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:54,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:54,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:25:54,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:55,307 INFO L124 PetriNetUnfolderBase]: 2680/4410 cut-off events. [2024-06-14 12:25:55,307 INFO L125 PetriNetUnfolderBase]: For 766320/766320 co-relation queries the response was YES. [2024-06-14 12:25:55,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44017 conditions, 4410 events. 2680/4410 cut-off events. For 766320/766320 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26803 event pairs, 634 based on Foata normal form. 2/4389 useless extension candidates. Maximal degree in co-relation 43870. Up to 3898 conditions per place. [2024-06-14 12:25:55,366 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 430 selfloop transitions, 17 changer transitions 0/484 dead transitions. [2024-06-14 12:25:55,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 484 transitions, 6135 flow [2024-06-14 12:25:55,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:25:55,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:25:55,367 INFO L175 Difference]: Start difference. First operand has 321 places, 465 transitions, 5083 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:25:55,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 484 transitions, 6135 flow [2024-06-14 12:25:57,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 484 transitions, 5999 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:57,505 INFO L231 Difference]: Finished difference. Result has 322 places, 470 transitions, 5108 flow [2024-06-14 12:25:57,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5108, PETRI_PLACES=322, PETRI_TRANSITIONS=470} [2024-06-14 12:25:57,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 12:25:57,506 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 470 transitions, 5108 flow [2024-06-14 12:25:57,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:57,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:57,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:57,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:25:57,506 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:25:57,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -641023922, now seen corresponding path program 4 times [2024-06-14 12:25:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:57,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659618586] [2024-06-14 12:25:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:57,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:58,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659618586] [2024-06-14 12:25:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659618586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:58,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:58,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:58,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609825457] [2024-06-14 12:25:58,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:58,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:58,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 12:25:58,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 470 transitions, 5108 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:58,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:58,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 12:25:58,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:59,666 INFO L124 PetriNetUnfolderBase]: 2675/4404 cut-off events. [2024-06-14 12:25:59,667 INFO L125 PetriNetUnfolderBase]: For 771446/771448 co-relation queries the response was YES. [2024-06-14 12:25:59,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44090 conditions, 4404 events. 2675/4404 cut-off events. For 771446/771448 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26798 event pairs, 633 based on Foata normal form. 4/4381 useless extension candidates. Maximal degree in co-relation 43941. Up to 3882 conditions per place. [2024-06-14 12:25:59,729 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 425 selfloop transitions, 24 changer transitions 0/486 dead transitions. [2024-06-14 12:25:59,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 486 transitions, 6155 flow [2024-06-14 12:25:59,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:25:59,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:25:59,730 INFO L175 Difference]: Start difference. First operand has 322 places, 470 transitions, 5108 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:25:59,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 486 transitions, 6155 flow [2024-06-14 12:26:02,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 486 transitions, 6040 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:02,373 INFO L231 Difference]: Finished difference. Result has 326 places, 475 transitions, 5173 flow [2024-06-14 12:26:02,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5173, PETRI_PLACES=326, PETRI_TRANSITIONS=475} [2024-06-14 12:26:02,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:26:02,373 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 475 transitions, 5173 flow [2024-06-14 12:26:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:02,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:02,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:02,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:26:02,373 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:02,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash 955049418, now seen corresponding path program 1 times [2024-06-14 12:26:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:02,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862765619] [2024-06-14 12:26:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:03,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862765619] [2024-06-14 12:26:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862765619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:03,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:03,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:26:03,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836249254] [2024-06-14 12:26:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:03,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:26:03,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:26:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:26:03,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:26:03,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 475 transitions, 5173 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:03,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:03,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:26:03,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:04,764 INFO L124 PetriNetUnfolderBase]: 2647/4325 cut-off events. [2024-06-14 12:26:04,765 INFO L125 PetriNetUnfolderBase]: For 771894/771912 co-relation queries the response was YES. [2024-06-14 12:26:04,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43401 conditions, 4325 events. 2647/4325 cut-off events. For 771894/771912 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 25981 event pairs, 656 based on Foata normal form. 2/4277 useless extension candidates. Maximal degree in co-relation 43250. Up to 3853 conditions per place. [2024-06-14 12:26:04,828 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 407 selfloop transitions, 23 changer transitions 0/490 dead transitions. [2024-06-14 12:26:04,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 490 transitions, 6151 flow [2024-06-14 12:26:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:26:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:26:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:26:04,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 12:26:04,828 INFO L175 Difference]: Start difference. First operand has 326 places, 475 transitions, 5173 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:26:04,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 490 transitions, 6151 flow [2024-06-14 12:26:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 490 transitions, 6016 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:06,964 INFO L231 Difference]: Finished difference. Result has 331 places, 477 transitions, 5175 flow [2024-06-14 12:26:06,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5175, PETRI_PLACES=331, PETRI_TRANSITIONS=477} [2024-06-14 12:26:06,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 12:26:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 477 transitions, 5175 flow [2024-06-14 12:26:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:06,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:06,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:06,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:26:06,965 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:06,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash -194811404, now seen corresponding path program 1 times [2024-06-14 12:26:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357374176] [2024-06-14 12:26:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:08,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357374176] [2024-06-14 12:26:08,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357374176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:08,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:08,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:08,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499197155] [2024-06-14 12:26:08,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:08,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:08,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:08,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:08,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:26:08,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 477 transitions, 5175 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:08,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:08,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:26:08,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:09,445 INFO L124 PetriNetUnfolderBase]: 2805/4553 cut-off events. [2024-06-14 12:26:09,445 INFO L125 PetriNetUnfolderBase]: For 787892/787894 co-relation queries the response was YES. [2024-06-14 12:26:09,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45347 conditions, 4553 events. 2805/4553 cut-off events. For 787892/787894 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27268 event pairs, 618 based on Foata normal form. 3/4543 useless extension candidates. Maximal degree in co-relation 45195. Up to 4003 conditions per place. [2024-06-14 12:26:09,503 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 59 changer transitions 0/507 dead transitions. [2024-06-14 12:26:09,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 507 transitions, 6373 flow [2024-06-14 12:26:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:26:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:26:09,506 INFO L175 Difference]: Start difference. First operand has 331 places, 477 transitions, 5175 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:26:09,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 507 transitions, 6373 flow [2024-06-14 12:26:11,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 507 transitions, 6252 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-14 12:26:11,722 INFO L231 Difference]: Finished difference. Result has 332 places, 480 transitions, 5330 flow [2024-06-14 12:26:11,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5330, PETRI_PLACES=332, PETRI_TRANSITIONS=480} [2024-06-14 12:26:11,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 12:26:11,723 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 480 transitions, 5330 flow [2024-06-14 12:26:11,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:11,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:11,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:11,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:26:11,724 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:11,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash 664777928, now seen corresponding path program 1 times [2024-06-14 12:26:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:11,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356778583] [2024-06-14 12:26:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356778583] [2024-06-14 12:26:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356778583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483654237] [2024-06-14 12:26:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:12,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:12,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 480 transitions, 5330 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:12,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:12,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:12,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:13,907 INFO L124 PetriNetUnfolderBase]: 2887/4639 cut-off events. [2024-06-14 12:26:13,907 INFO L125 PetriNetUnfolderBase]: For 810536/810538 co-relation queries the response was YES. [2024-06-14 12:26:13,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46419 conditions, 4639 events. 2887/4639 cut-off events. For 810536/810538 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27353 event pairs, 644 based on Foata normal form. 4/4642 useless extension candidates. Maximal degree in co-relation 46266. Up to 4191 conditions per place. [2024-06-14 12:26:13,970 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 430 selfloop transitions, 74 changer transitions 0/509 dead transitions. [2024-06-14 12:26:13,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 509 transitions, 6554 flow [2024-06-14 12:26:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:26:13,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:26:13,971 INFO L175 Difference]: Start difference. First operand has 332 places, 480 transitions, 5330 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:26:13,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 509 transitions, 6554 flow [2024-06-14 12:26:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 509 transitions, 6288 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:16,127 INFO L231 Difference]: Finished difference. Result has 334 places, 483 transitions, 5343 flow [2024-06-14 12:26:16,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5343, PETRI_PLACES=334, PETRI_TRANSITIONS=483} [2024-06-14 12:26:16,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 12:26:16,128 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 483 transitions, 5343 flow [2024-06-14 12:26:16,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:16,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:16,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:16,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:26:16,128 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:16,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash 842146598, now seen corresponding path program 2 times [2024-06-14 12:26:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787738173] [2024-06-14 12:26:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:17,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787738173] [2024-06-14 12:26:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787738173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:17,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816495304] [2024-06-14 12:26:17,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:17,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:17,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:17,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:17,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 483 transitions, 5343 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:18,261 INFO L124 PetriNetUnfolderBase]: 2918/4686 cut-off events. [2024-06-14 12:26:18,261 INFO L125 PetriNetUnfolderBase]: For 844268/844270 co-relation queries the response was YES. [2024-06-14 12:26:18,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47643 conditions, 4686 events. 2918/4686 cut-off events. For 844268/844270 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27646 event pairs, 596 based on Foata normal form. 4/4689 useless extension candidates. Maximal degree in co-relation 47489. Up to 4130 conditions per place. [2024-06-14 12:26:18,325 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 403 selfloop transitions, 113 changer transitions 0/521 dead transitions. [2024-06-14 12:26:18,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 521 transitions, 6956 flow [2024-06-14 12:26:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:26:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:26:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:26:18,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:26:18,326 INFO L175 Difference]: Start difference. First operand has 334 places, 483 transitions, 5343 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:26:18,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 521 transitions, 6956 flow [2024-06-14 12:26:20,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 521 transitions, 6709 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:20,820 INFO L231 Difference]: Finished difference. Result has 338 places, 492 transitions, 5632 flow [2024-06-14 12:26:20,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5096, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5632, PETRI_PLACES=338, PETRI_TRANSITIONS=492} [2024-06-14 12:26:20,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-14 12:26:20,821 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 492 transitions, 5632 flow [2024-06-14 12:26:20,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:20,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:20,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:20,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:26:20,821 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:20,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash 841909448, now seen corresponding path program 3 times [2024-06-14 12:26:20,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:20,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292480641] [2024-06-14 12:26:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292480641] [2024-06-14 12:26:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292480641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:21,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644865921] [2024-06-14 12:26:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:21,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:21,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 492 transitions, 5632 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:21,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:21,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:21,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:23,001 INFO L124 PetriNetUnfolderBase]: 2912/4680 cut-off events. [2024-06-14 12:26:23,001 INFO L125 PetriNetUnfolderBase]: For 855692/855694 co-relation queries the response was YES. [2024-06-14 12:26:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47898 conditions, 4680 events. 2912/4680 cut-off events. For 855692/855694 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27661 event pairs, 598 based on Foata normal form. 4/4683 useless extension candidates. Maximal degree in co-relation 47742. Up to 4125 conditions per place. [2024-06-14 12:26:23,071 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 408 selfloop transitions, 107 changer transitions 0/520 dead transitions. [2024-06-14 12:26:23,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 520 transitions, 6774 flow [2024-06-14 12:26:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:26:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:26:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:26:23,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-14 12:26:23,072 INFO L175 Difference]: Start difference. First operand has 338 places, 492 transitions, 5632 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:26:23,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 520 transitions, 6774 flow [2024-06-14 12:26:25,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 520 transitions, 6434 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:25,979 INFO L231 Difference]: Finished difference. Result has 342 places, 492 transitions, 5517 flow [2024-06-14 12:26:25,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5517, PETRI_PLACES=342, PETRI_TRANSITIONS=492} [2024-06-14 12:26:25,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 12:26:25,980 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 492 transitions, 5517 flow [2024-06-14 12:26:25,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:25,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:25,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:25,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:26:25,980 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:25,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash -56167934, now seen corresponding path program 2 times [2024-06-14 12:26:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306535037] [2024-06-14 12:26:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:26,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306535037] [2024-06-14 12:26:26,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306535037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:26,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:26,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790299502] [2024-06-14 12:26:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:26,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:26,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:26:26,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 492 transitions, 5517 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:26,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:26,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:26:26,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:28,173 INFO L124 PetriNetUnfolderBase]: 2854/4629 cut-off events. [2024-06-14 12:26:28,173 INFO L125 PetriNetUnfolderBase]: For 866988/866988 co-relation queries the response was YES. [2024-06-14 12:26:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47869 conditions, 4629 events. 2854/4629 cut-off events. For 866988/866988 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 27773 event pairs, 587 based on Foata normal form. 1/4616 useless extension candidates. Maximal degree in co-relation 47711. Up to 3893 conditions per place. [2024-06-14 12:26:28,248 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 402 selfloop transitions, 87 changer transitions 0/524 dead transitions. [2024-06-14 12:26:28,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 524 transitions, 6784 flow [2024-06-14 12:26:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:26:28,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-14 12:26:28,249 INFO L175 Difference]: Start difference. First operand has 342 places, 492 transitions, 5517 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:26:28,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 524 transitions, 6784 flow [2024-06-14 12:26:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 524 transitions, 6603 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:30,774 INFO L231 Difference]: Finished difference. Result has 344 places, 498 transitions, 5710 flow [2024-06-14 12:26:30,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5710, PETRI_PLACES=344, PETRI_TRANSITIONS=498} [2024-06-14 12:26:30,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 12:26:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 498 transitions, 5710 flow [2024-06-14 12:26:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:30,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:30,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:30,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:26:30,775 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:30,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1020185698, now seen corresponding path program 4 times [2024-06-14 12:26:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483729819] [2024-06-14 12:26:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483729819] [2024-06-14 12:26:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483729819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:31,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:31,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992319596] [2024-06-14 12:26:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:31,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:31,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:31,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 498 transitions, 5710 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:31,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:31,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:31,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:33,003 INFO L124 PetriNetUnfolderBase]: 2938/4718 cut-off events. [2024-06-14 12:26:33,003 INFO L125 PetriNetUnfolderBase]: For 893366/893368 co-relation queries the response was YES. [2024-06-14 12:26:33,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48973 conditions, 4718 events. 2938/4718 cut-off events. For 893366/893368 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27939 event pairs, 651 based on Foata normal form. 4/4721 useless extension candidates. Maximal degree in co-relation 48814. Up to 4236 conditions per place. [2024-06-14 12:26:33,063 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 442 selfloop transitions, 79 changer transitions 0/526 dead transitions. [2024-06-14 12:26:33,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 526 transitions, 6985 flow [2024-06-14 12:26:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:26:33,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:26:33,064 INFO L175 Difference]: Start difference. First operand has 344 places, 498 transitions, 5710 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:26:33,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 526 transitions, 6985 flow [2024-06-14 12:26:35,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 526 transitions, 6663 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:35,560 INFO L231 Difference]: Finished difference. Result has 347 places, 501 transitions, 5688 flow [2024-06-14 12:26:35,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5688, PETRI_PLACES=347, PETRI_TRANSITIONS=501} [2024-06-14 12:26:35,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-14 12:26:35,560 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 501 transitions, 5688 flow [2024-06-14 12:26:35,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:35,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:35,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:35,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:26:35,561 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:35,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1014943474, now seen corresponding path program 3 times [2024-06-14 12:26:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486154279] [2024-06-14 12:26:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:36,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:36,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486154279] [2024-06-14 12:26:36,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486154279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:36,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:36,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:36,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119251548] [2024-06-14 12:26:36,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:36,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:26:36,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 501 transitions, 5688 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:36,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:36,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:26:36,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:37,815 INFO L124 PetriNetUnfolderBase]: 2869/4652 cut-off events. [2024-06-14 12:26:37,815 INFO L125 PetriNetUnfolderBase]: For 911371/911371 co-relation queries the response was YES. [2024-06-14 12:26:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 4652 events. 2869/4652 cut-off events. For 911371/911371 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27904 event pairs, 627 based on Foata normal form. 1/4639 useless extension candidates. Maximal degree in co-relation 48986. Up to 3910 conditions per place. [2024-06-14 12:26:37,879 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 401 selfloop transitions, 93 changer transitions 0/530 dead transitions. [2024-06-14 12:26:37,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 530 transitions, 6947 flow [2024-06-14 12:26:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:26:37,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-14 12:26:37,880 INFO L175 Difference]: Start difference. First operand has 347 places, 501 transitions, 5688 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:26:37,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 530 transitions, 6947 flow [2024-06-14 12:26:40,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 530 transitions, 6669 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 12:26:40,165 INFO L231 Difference]: Finished difference. Result has 349 places, 504 transitions, 5778 flow [2024-06-14 12:26:40,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5778, PETRI_PLACES=349, PETRI_TRANSITIONS=504} [2024-06-14 12:26:40,165 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 12:26:40,165 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 504 transitions, 5778 flow [2024-06-14 12:26:40,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:40,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:40,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:26:40,165 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:40,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash 775640464, now seen corresponding path program 1 times [2024-06-14 12:26:40,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:40,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785722603] [2024-06-14 12:26:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:40,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:41,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:41,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785722603] [2024-06-14 12:26:41,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785722603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:41,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:41,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:41,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629186296] [2024-06-14 12:26:41,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:41,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:41,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:41,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:41,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:41,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 504 transitions, 5778 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:41,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:41,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:42,666 INFO L124 PetriNetUnfolderBase]: 2964/4766 cut-off events. [2024-06-14 12:26:42,666 INFO L125 PetriNetUnfolderBase]: For 931304/931306 co-relation queries the response was YES. [2024-06-14 12:26:42,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50205 conditions, 4766 events. 2964/4766 cut-off events. For 931304/931306 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28333 event pairs, 676 based on Foata normal form. 3/4767 useless extension candidates. Maximal degree in co-relation 50044. Up to 4341 conditions per place. [2024-06-14 12:26:42,737 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 476 selfloop transitions, 53 changer transitions 0/534 dead transitions. [2024-06-14 12:26:42,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 534 transitions, 7084 flow [2024-06-14 12:26:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:26:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:26:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:26:42,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:26:42,738 INFO L175 Difference]: Start difference. First operand has 349 places, 504 transitions, 5778 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:26:42,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 534 transitions, 7084 flow [2024-06-14 12:26:45,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 534 transitions, 6701 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-14 12:26:45,584 INFO L231 Difference]: Finished difference. Result has 352 places, 513 transitions, 5694 flow [2024-06-14 12:26:45,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5694, PETRI_PLACES=352, PETRI_TRANSITIONS=513} [2024-06-14 12:26:45,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 12:26:45,585 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 513 transitions, 5694 flow [2024-06-14 12:26:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:45,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:45,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:45,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:26:45,585 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:45,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1263489164, now seen corresponding path program 4 times [2024-06-14 12:26:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:45,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078639283] [2024-06-14 12:26:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:45,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:46,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:46,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078639283] [2024-06-14 12:26:46,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078639283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:46,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:46,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:46,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786738528] [2024-06-14 12:26:46,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:46,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:46,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:46,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:46,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:46,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:26:46,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 513 transitions, 5694 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:46,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:46,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:26:46,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:48,166 INFO L124 PetriNetUnfolderBase]: 2954/4802 cut-off events. [2024-06-14 12:26:48,166 INFO L125 PetriNetUnfolderBase]: For 952800/952800 co-relation queries the response was YES. [2024-06-14 12:26:48,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50529 conditions, 4802 events. 2954/4802 cut-off events. For 952800/952800 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29147 event pairs, 658 based on Foata normal form. 1/4789 useless extension candidates. Maximal degree in co-relation 50366. Up to 3988 conditions per place. [2024-06-14 12:26:48,229 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 412 selfloop transitions, 111 changer transitions 0/560 dead transitions. [2024-06-14 12:26:48,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 560 transitions, 7148 flow [2024-06-14 12:26:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:26:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:26:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:26:48,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:26:48,230 INFO L175 Difference]: Start difference. First operand has 352 places, 513 transitions, 5694 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:26:48,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 560 transitions, 7148 flow [2024-06-14 12:26:51,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 560 transitions, 6960 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:51,577 INFO L231 Difference]: Finished difference. Result has 359 places, 537 transitions, 6117 flow [2024-06-14 12:26:51,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6117, PETRI_PLACES=359, PETRI_TRANSITIONS=537} [2024-06-14 12:26:51,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 12:26:51,577 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 537 transitions, 6117 flow [2024-06-14 12:26:51,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:51,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:51,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:26:51,577 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:51,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1010931268, now seen corresponding path program 5 times [2024-06-14 12:26:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:51,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208140214] [2024-06-14 12:26:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208140214] [2024-06-14 12:26:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208140214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:52,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717465980] [2024-06-14 12:26:52,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:52,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:52,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:52,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:52,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 537 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:52,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:52,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:52,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:53,790 INFO L124 PetriNetUnfolderBase]: 3054/4916 cut-off events. [2024-06-14 12:26:53,790 INFO L125 PetriNetUnfolderBase]: For 996553/996555 co-relation queries the response was YES. [2024-06-14 12:26:53,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52478 conditions, 4916 events. 3054/4916 cut-off events. For 996553/996555 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29375 event pairs, 647 based on Foata normal form. 4/4919 useless extension candidates. Maximal degree in co-relation 52312. Up to 4232 conditions per place. [2024-06-14 12:26:53,860 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 118 changer transitions 0/567 dead transitions. [2024-06-14 12:26:53,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 567 transitions, 7852 flow [2024-06-14 12:26:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:26:53,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:26:53,861 INFO L175 Difference]: Start difference. First operand has 359 places, 537 transitions, 6117 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:26:53,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 567 transitions, 7852 flow [2024-06-14 12:26:56,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 567 transitions, 7556 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-14 12:26:56,627 INFO L231 Difference]: Finished difference. Result has 364 places, 543 transitions, 6365 flow [2024-06-14 12:26:56,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6365, PETRI_PLACES=364, PETRI_TRANSITIONS=543} [2024-06-14 12:26:56,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 12:26:56,627 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 543 transitions, 6365 flow [2024-06-14 12:26:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:56,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:56,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:26:56,627 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:26:56,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash -46897105, now seen corresponding path program 1 times [2024-06-14 12:26:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605447530] [2024-06-14 12:26:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:57,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605447530] [2024-06-14 12:26:57,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605447530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:57,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:57,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:26:57,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100726238] [2024-06-14 12:26:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:26:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:26:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:26:57,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:26:57,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 543 transitions, 6365 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:57,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:57,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:26:57,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:58,839 INFO L124 PetriNetUnfolderBase]: 3064/4931 cut-off events. [2024-06-14 12:26:58,839 INFO L125 PetriNetUnfolderBase]: For 1022106/1022110 co-relation queries the response was YES. [2024-06-14 12:26:58,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53129 conditions, 4931 events. 3064/4931 cut-off events. For 1022106/1022110 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 29508 event pairs, 619 based on Foata normal form. 6/4936 useless extension candidates. Maximal degree in co-relation 52962. Up to 4475 conditions per place. [2024-06-14 12:26:58,916 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 60 changer transitions 0/569 dead transitions. [2024-06-14 12:26:58,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 569 transitions, 7698 flow [2024-06-14 12:26:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:26:58,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:26:58,917 INFO L175 Difference]: Start difference. First operand has 364 places, 543 transitions, 6365 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:26:58,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 569 transitions, 7698 flow [2024-06-14 12:27:02,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 569 transitions, 7388 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:02,063 INFO L231 Difference]: Finished difference. Result has 368 places, 546 transitions, 6297 flow [2024-06-14 12:27:02,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6055, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6297, PETRI_PLACES=368, PETRI_TRANSITIONS=546} [2024-06-14 12:27:02,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 12:27:02,064 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 546 transitions, 6297 flow [2024-06-14 12:27:02,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:02,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:02,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:02,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:27:02,064 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:02,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash -46897508, now seen corresponding path program 6 times [2024-06-14 12:27:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:02,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461277946] [2024-06-14 12:27:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:03,010 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 12:27:03,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461277946] [2024-06-14 12:27:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461277946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:03,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:03,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:03,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873593233] [2024-06-14 12:27:03,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:03,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:03,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 546 transitions, 6297 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:03,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:03,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:03,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:04,307 INFO L124 PetriNetUnfolderBase]: 3058/4922 cut-off events. [2024-06-14 12:27:04,307 INFO L125 PetriNetUnfolderBase]: For 1011435/1011437 co-relation queries the response was YES. [2024-06-14 12:27:04,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53143 conditions, 4922 events. 3058/4922 cut-off events. For 1011435/1011437 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 29398 event pairs, 638 based on Foata normal form. 4/4925 useless extension candidates. Maximal degree in co-relation 52974. Up to 4241 conditions per place. [2024-06-14 12:27:04,386 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 439 selfloop transitions, 125 changer transitions 0/569 dead transitions. [2024-06-14 12:27:04,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 569 transitions, 7522 flow [2024-06-14 12:27:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:27:04,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:27:04,387 INFO L175 Difference]: Start difference. First operand has 368 places, 546 transitions, 6297 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:27:04,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 569 transitions, 7522 flow [2024-06-14 12:27:07,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 569 transitions, 7206 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:08,001 INFO L231 Difference]: Finished difference. Result has 370 places, 546 transitions, 6239 flow [2024-06-14 12:27:08,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6239, PETRI_PLACES=370, PETRI_TRANSITIONS=546} [2024-06-14 12:27:08,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 12:27:08,002 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 546 transitions, 6239 flow [2024-06-14 12:27:08,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:08,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:08,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:08,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:27:08,002 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:08,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:08,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1156443996, now seen corresponding path program 7 times [2024-06-14 12:27:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:08,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517611422] [2024-06-14 12:27:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:09,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:09,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517611422] [2024-06-14 12:27:09,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517611422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:09,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:09,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:09,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899451470] [2024-06-14 12:27:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:09,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:09,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:09,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:09,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 546 transitions, 6239 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:09,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:09,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:09,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:10,512 INFO L124 PetriNetUnfolderBase]: 3073/4944 cut-off events. [2024-06-14 12:27:10,513 INFO L125 PetriNetUnfolderBase]: For 1027934/1027934 co-relation queries the response was YES. [2024-06-14 12:27:10,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 4944 events. 3073/4944 cut-off events. For 1027934/1027934 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29536 event pairs, 616 based on Foata normal form. 2/4945 useless extension candidates. Maximal degree in co-relation 53379. Up to 4495 conditions per place. [2024-06-14 12:27:10,582 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 73 changer transitions 0/569 dead transitions. [2024-06-14 12:27:10,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 569 transitions, 7614 flow [2024-06-14 12:27:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:27:10,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:27:10,583 INFO L175 Difference]: Start difference. First operand has 370 places, 546 transitions, 6239 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:27:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 569 transitions, 7614 flow [2024-06-14 12:27:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 569 transitions, 7349 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 12:27:13,154 INFO L231 Difference]: Finished difference. Result has 371 places, 552 transitions, 6319 flow [2024-06-14 12:27:13,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6319, PETRI_PLACES=371, PETRI_TRANSITIONS=552} [2024-06-14 12:27:13,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 12:27:13,154 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 552 transitions, 6319 flow [2024-06-14 12:27:13,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:13,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:13,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:27:13,155 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:13,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:13,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1156563966, now seen corresponding path program 8 times [2024-06-14 12:27:13,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:13,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770952206] [2024-06-14 12:27:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:14,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:14,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770952206] [2024-06-14 12:27:14,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770952206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:14,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:14,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319002659] [2024-06-14 12:27:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:14,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:14,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 552 transitions, 6319 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:14,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:14,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:15,527 INFO L124 PetriNetUnfolderBase]: 3115/5013 cut-off events. [2024-06-14 12:27:15,527 INFO L125 PetriNetUnfolderBase]: For 1084619/1084621 co-relation queries the response was YES. [2024-06-14 12:27:15,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55391 conditions, 5013 events. 3115/5013 cut-off events. For 1084619/1084621 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 30023 event pairs, 652 based on Foata normal form. 4/5016 useless extension candidates. Maximal degree in co-relation 55220. Up to 4032 conditions per place. [2024-06-14 12:27:15,605 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 372 selfloop transitions, 206 changer transitions 0/583 dead transitions. [2024-06-14 12:27:15,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 583 transitions, 8497 flow [2024-06-14 12:27:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:27:15,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:27:15,606 INFO L175 Difference]: Start difference. First operand has 371 places, 552 transitions, 6319 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:27:15,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 583 transitions, 8497 flow [2024-06-14 12:27:18,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 583 transitions, 8154 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-14 12:27:18,822 INFO L231 Difference]: Finished difference. Result has 373 places, 561 transitions, 6886 flow [2024-06-14 12:27:18,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6886, PETRI_PLACES=373, PETRI_TRANSITIONS=561} [2024-06-14 12:27:18,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 12:27:18,822 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 561 transitions, 6886 flow [2024-06-14 12:27:18,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:18,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:18,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:18,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:27:18,823 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:18,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1149201156, now seen corresponding path program 9 times [2024-06-14 12:27:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:18,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133171942] [2024-06-14 12:27:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:19,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:19,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133171942] [2024-06-14 12:27:19,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133171942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:19,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:19,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:19,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793797895] [2024-06-14 12:27:19,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:19,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:19,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:19,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 561 transitions, 6886 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:19,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:19,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:19,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:21,184 INFO L124 PetriNetUnfolderBase]: 3157/5079 cut-off events. [2024-06-14 12:27:21,184 INFO L125 PetriNetUnfolderBase]: For 1144482/1144484 co-relation queries the response was YES. [2024-06-14 12:27:21,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57654 conditions, 5079 events. 3157/5079 cut-off events. For 1144482/1144484 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 30514 event pairs, 634 based on Foata normal form. 4/5082 useless extension candidates. Maximal degree in co-relation 57483. Up to 4072 conditions per place. [2024-06-14 12:27:21,261 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 395 selfloop transitions, 193 changer transitions 0/593 dead transitions. [2024-06-14 12:27:21,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 593 transitions, 9334 flow [2024-06-14 12:27:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:21,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:27:21,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:27:21,262 INFO L175 Difference]: Start difference. First operand has 373 places, 561 transitions, 6886 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:27:21,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 593 transitions, 9334 flow [2024-06-14 12:27:24,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 593 transitions, 8872 flow, removed 141 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:24,080 INFO L231 Difference]: Finished difference. Result has 378 places, 570 transitions, 7320 flow [2024-06-14 12:27:24,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7320, PETRI_PLACES=378, PETRI_TRANSITIONS=570} [2024-06-14 12:27:24,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 12:27:24,080 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 570 transitions, 7320 flow [2024-06-14 12:27:24,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:24,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:24,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:24,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:27:24,081 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:24,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:24,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1156831279, now seen corresponding path program 2 times [2024-06-14 12:27:24,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:24,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623947231] [2024-06-14 12:27:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:24,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:25,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623947231] [2024-06-14 12:27:25,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623947231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:25,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:25,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568274401] [2024-06-14 12:27:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:25,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:25,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:25,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:25,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 570 transitions, 7320 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:25,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:25,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:25,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:26,477 INFO L124 PetriNetUnfolderBase]: 3183/5113 cut-off events. [2024-06-14 12:27:26,477 INFO L125 PetriNetUnfolderBase]: For 1152615/1152619 co-relation queries the response was YES. [2024-06-14 12:27:26,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57767 conditions, 5113 events. 3183/5113 cut-off events. For 1152615/1152619 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30704 event pairs, 626 based on Foata normal form. 6/5118 useless extension candidates. Maximal degree in co-relation 57594. Up to 4532 conditions per place. [2024-06-14 12:27:26,556 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 497 selfloop transitions, 97 changer transitions 0/599 dead transitions. [2024-06-14 12:27:26,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 599 transitions, 9063 flow [2024-06-14 12:27:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:27:26,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:27:26,561 INFO L175 Difference]: Start difference. First operand has 378 places, 570 transitions, 7320 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:27:26,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 599 transitions, 9063 flow [2024-06-14 12:27:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 599 transitions, 8677 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-14 12:27:30,557 INFO L231 Difference]: Finished difference. Result has 384 places, 578 transitions, 7400 flow [2024-06-14 12:27:30,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6934, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7400, PETRI_PLACES=384, PETRI_TRANSITIONS=578} [2024-06-14 12:27:30,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 12:27:30,557 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 578 transitions, 7400 flow [2024-06-14 12:27:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:30,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:30,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:27:30,558 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:30,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1156564369, now seen corresponding path program 3 times [2024-06-14 12:27:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:30,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518621264] [2024-06-14 12:27:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:31,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:31,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518621264] [2024-06-14 12:27:31,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518621264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:31,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:31,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647247578] [2024-06-14 12:27:31,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:31,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:31,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:31,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:31,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 578 transitions, 7400 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:31,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:31,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:31,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:32,848 INFO L124 PetriNetUnfolderBase]: 3193/5129 cut-off events. [2024-06-14 12:27:32,848 INFO L125 PetriNetUnfolderBase]: For 1173804/1173808 co-relation queries the response was YES. [2024-06-14 12:27:32,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58021 conditions, 5129 events. 3193/5129 cut-off events. For 1173804/1173808 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30873 event pairs, 668 based on Foata normal form. 6/5134 useless extension candidates. Maximal degree in co-relation 57846. Up to 4542 conditions per place. [2024-06-14 12:27:32,930 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 502 selfloop transitions, 95 changer transitions 0/602 dead transitions. [2024-06-14 12:27:32,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 602 transitions, 9033 flow [2024-06-14 12:27:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:27:32,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:27:32,931 INFO L175 Difference]: Start difference. First operand has 384 places, 578 transitions, 7400 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:27:32,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 602 transitions, 9033 flow [2024-06-14 12:27:36,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 602 transitions, 8758 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-14 12:27:36,614 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 7444 flow [2024-06-14 12:27:36,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7153, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7444, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-14 12:27:36,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-14 12:27:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 7444 flow [2024-06-14 12:27:36,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:36,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:36,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:36,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:27:36,615 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:36,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:36,616 INFO L85 PathProgramCache]: Analyzing trace with hash 181696636, now seen corresponding path program 10 times [2024-06-14 12:27:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439933817] [2024-06-14 12:27:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:37,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:37,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439933817] [2024-06-14 12:27:37,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439933817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:37,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:37,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649997273] [2024-06-14 12:27:37,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:37,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:37,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:37,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:37,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 7444 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:37,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:37,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:37,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:39,201 INFO L124 PetriNetUnfolderBase]: 3187/5116 cut-off events. [2024-06-14 12:27:39,202 INFO L125 PetriNetUnfolderBase]: For 1174015/1174015 co-relation queries the response was YES. [2024-06-14 12:27:39,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57816 conditions, 5116 events. 3187/5116 cut-off events. For 1174015/1174015 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30627 event pairs, 673 based on Foata normal form. 2/5117 useless extension candidates. Maximal degree in co-relation 57639. Up to 4630 conditions per place. [2024-06-14 12:27:39,276 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 522 selfloop transitions, 76 changer transitions 0/603 dead transitions. [2024-06-14 12:27:39,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 603 transitions, 8954 flow [2024-06-14 12:27:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:27:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:27:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 12:27:39,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 12:27:39,277 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 7444 flow. Second operand 11 states and 191 transitions. [2024-06-14 12:27:39,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 603 transitions, 8954 flow [2024-06-14 12:27:43,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 603 transitions, 8614 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-14 12:27:43,294 INFO L231 Difference]: Finished difference. Result has 393 places, 581 transitions, 7262 flow [2024-06-14 12:27:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7104, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7262, PETRI_PLACES=393, PETRI_TRANSITIONS=581} [2024-06-14 12:27:43,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 12:27:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 581 transitions, 7262 flow [2024-06-14 12:27:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:43,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:43,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:27:43,295 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:43,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:43,295 INFO L85 PathProgramCache]: Analyzing trace with hash 181459486, now seen corresponding path program 11 times [2024-06-14 12:27:43,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:43,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629252169] [2024-06-14 12:27:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:43,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:44,359 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 12:27:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:44,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629252169] [2024-06-14 12:27:44,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629252169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:44,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:44,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007885679] [2024-06-14 12:27:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:44,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:44,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 581 transitions, 7262 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:44,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:44,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:44,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:45,852 INFO L124 PetriNetUnfolderBase]: 3181/5108 cut-off events. [2024-06-14 12:27:45,852 INFO L125 PetriNetUnfolderBase]: For 1174434/1174434 co-relation queries the response was YES. [2024-06-14 12:27:45,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57316 conditions, 5108 events. 3181/5108 cut-off events. For 1174434/1174434 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30588 event pairs, 673 based on Foata normal form. 2/5109 useless extension candidates. Maximal degree in co-relation 57138. Up to 4625 conditions per place. [2024-06-14 12:27:45,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 519 selfloop transitions, 75 changer transitions 0/599 dead transitions. [2024-06-14 12:27:45,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 599 transitions, 8518 flow [2024-06-14 12:27:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:27:45,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:27:45,932 INFO L175 Difference]: Start difference. First operand has 393 places, 581 transitions, 7262 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:27:45,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 599 transitions, 8518 flow [2024-06-14 12:27:49,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 599 transitions, 8123 flow, removed 74 selfloop flow, removed 10 redundant places. [2024-06-14 12:27:49,823 INFO L231 Difference]: Finished difference. Result has 392 places, 581 transitions, 7023 flow [2024-06-14 12:27:49,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6867, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7023, PETRI_PLACES=392, PETRI_TRANSITIONS=581} [2024-06-14 12:27:49,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 12:27:49,823 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 581 transitions, 7023 flow [2024-06-14 12:27:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:49,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:49,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:27:49,824 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:49,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 96993425, now seen corresponding path program 4 times [2024-06-14 12:27:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964698649] [2024-06-14 12:27:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:50,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964698649] [2024-06-14 12:27:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964698649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:50,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498103054] [2024-06-14 12:27:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:50,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:50,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:50,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 581 transitions, 7023 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:50,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:50,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:50,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:52,128 INFO L124 PetriNetUnfolderBase]: 3191/5129 cut-off events. [2024-06-14 12:27:52,129 INFO L125 PetriNetUnfolderBase]: For 1190790/1190794 co-relation queries the response was YES. [2024-06-14 12:27:52,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57288 conditions, 5129 events. 3191/5129 cut-off events. For 1190790/1190794 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 30853 event pairs, 681 based on Foata normal form. 6/5134 useless extension candidates. Maximal degree in co-relation 57111. Up to 4536 conditions per place. [2024-06-14 12:27:52,209 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 92 changer transitions 0/605 dead transitions. [2024-06-14 12:27:52,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 605 transitions, 8643 flow [2024-06-14 12:27:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:27:52,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:27:52,211 INFO L175 Difference]: Start difference. First operand has 392 places, 581 transitions, 7023 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:27:52,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 605 transitions, 8643 flow [2024-06-14 12:27:56,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 605 transitions, 8493 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:27:56,085 INFO L231 Difference]: Finished difference. Result has 393 places, 584 transitions, 7161 flow [2024-06-14 12:27:56,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7161, PETRI_PLACES=393, PETRI_TRANSITIONS=584} [2024-06-14 12:27:56,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 12:27:56,085 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 584 transitions, 7161 flow [2024-06-14 12:27:56,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:56,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:27:56,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:27:56,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:27:56,086 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:27:56,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:27:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 185189716, now seen corresponding path program 12 times [2024-06-14 12:27:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:27:56,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321064375] [2024-06-14 12:27:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:27:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:27:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:27:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:27:57,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:27:57,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321064375] [2024-06-14 12:27:57,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321064375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:27:57,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:27:57,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:27:57,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188145900] [2024-06-14 12:27:57,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:27:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:27:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:27:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:27:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:27:57,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:27:57,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 584 transitions, 7161 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:27:57,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:27:57,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:27:57,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:27:58,513 INFO L124 PetriNetUnfolderBase]: 3185/5127 cut-off events. [2024-06-14 12:27:58,513 INFO L125 PetriNetUnfolderBase]: For 1194368/1194370 co-relation queries the response was YES. [2024-06-14 12:27:58,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57194 conditions, 5127 events. 3185/5127 cut-off events. For 1194368/1194370 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 30916 event pairs, 673 based on Foata normal form. 4/5130 useless extension candidates. Maximal degree in co-relation 57016. Up to 4121 conditions per place. [2024-06-14 12:27:58,597 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 401 selfloop transitions, 199 changer transitions 0/605 dead transitions. [2024-06-14 12:27:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 605 transitions, 8685 flow [2024-06-14 12:27:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:27:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:27:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:27:58,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:27:58,598 INFO L175 Difference]: Start difference. First operand has 393 places, 584 transitions, 7161 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:27:58,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 605 transitions, 8685 flow [2024-06-14 12:28:02,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 605 transitions, 8358 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:02,968 INFO L231 Difference]: Finished difference. Result has 396 places, 584 transitions, 7238 flow [2024-06-14 12:28:02,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6834, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7238, PETRI_PLACES=396, PETRI_TRANSITIONS=584} [2024-06-14 12:28:02,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 12:28:02,969 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 584 transitions, 7238 flow [2024-06-14 12:28:02,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:02,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:02,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:02,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:28:02,969 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:02,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:02,970 INFO L85 PathProgramCache]: Analyzing trace with hash -387902688, now seen corresponding path program 1 times [2024-06-14 12:28:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:02,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834738197] [2024-06-14 12:28:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:02,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834738197] [2024-06-14 12:28:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834738197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:03,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:03,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455707361] [2024-06-14 12:28:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:03,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:03,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 584 transitions, 7238 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:03,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:05,320 INFO L124 PetriNetUnfolderBase]: 3193/5129 cut-off events. [2024-06-14 12:28:05,320 INFO L125 PetriNetUnfolderBase]: For 1211192/1211194 co-relation queries the response was YES. [2024-06-14 12:28:05,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57563 conditions, 5129 events. 3193/5129 cut-off events. For 1211192/1211194 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30748 event pairs, 539 based on Foata normal form. 4/5132 useless extension candidates. Maximal degree in co-relation 57384. Up to 4662 conditions per place. [2024-06-14 12:28:05,395 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 41 changer transitions 0/613 dead transitions. [2024-06-14 12:28:05,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 613 transitions, 8616 flow [2024-06-14 12:28:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:28:05,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:28:05,396 INFO L175 Difference]: Start difference. First operand has 396 places, 584 transitions, 7238 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:28:05,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 613 transitions, 8616 flow [2024-06-14 12:28:10,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 613 transitions, 8309 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:10,150 INFO L231 Difference]: Finished difference. Result has 398 places, 586 transitions, 7092 flow [2024-06-14 12:28:10,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7092, PETRI_PLACES=398, PETRI_TRANSITIONS=586} [2024-06-14 12:28:10,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 12:28:10,151 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 586 transitions, 7092 flow [2024-06-14 12:28:10,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:10,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:10,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:28:10,151 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:10,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1668079628, now seen corresponding path program 2 times [2024-06-14 12:28:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:10,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597893994] [2024-06-14 12:28:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:10,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:11,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:11,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597893994] [2024-06-14 12:28:11,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597893994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:11,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:11,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:11,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296954121] [2024-06-14 12:28:11,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:11,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:11,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:11,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:11,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 586 transitions, 7092 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:11,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:11,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:11,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:12,518 INFO L124 PetriNetUnfolderBase]: 3214/5160 cut-off events. [2024-06-14 12:28:12,518 INFO L125 PetriNetUnfolderBase]: For 1243567/1243569 co-relation queries the response was YES. [2024-06-14 12:28:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58061 conditions, 5160 events. 3214/5160 cut-off events. For 1243567/1243569 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31018 event pairs, 679 based on Foata normal form. 4/5163 useless extension candidates. Maximal degree in co-relation 57881. Up to 4696 conditions per place. [2024-06-14 12:28:12,603 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 553 selfloop transitions, 56 changer transitions 0/614 dead transitions. [2024-06-14 12:28:12,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 614 transitions, 8778 flow [2024-06-14 12:28:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:28:12,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:28:12,604 INFO L175 Difference]: Start difference. First operand has 398 places, 586 transitions, 7092 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:28:12,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 614 transitions, 8778 flow [2024-06-14 12:28:17,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 614 transitions, 8633 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:17,535 INFO L231 Difference]: Finished difference. Result has 400 places, 590 transitions, 7216 flow [2024-06-14 12:28:17,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7216, PETRI_PLACES=400, PETRI_TRANSITIONS=590} [2024-06-14 12:28:17,536 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 12:28:17,536 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 590 transitions, 7216 flow [2024-06-14 12:28:17,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:17,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:17,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:17,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:28:17,536 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:17,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash 583538522, now seen corresponding path program 3 times [2024-06-14 12:28:17,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:17,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744436136] [2024-06-14 12:28:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:18,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744436136] [2024-06-14 12:28:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744436136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:18,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:18,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644753745] [2024-06-14 12:28:18,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:18,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:18,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:18,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 590 transitions, 7216 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:18,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:18,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:18,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:19,892 INFO L124 PetriNetUnfolderBase]: 3209/5153 cut-off events. [2024-06-14 12:28:19,892 INFO L125 PetriNetUnfolderBase]: For 1249418/1249420 co-relation queries the response was YES. [2024-06-14 12:28:19,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57899 conditions, 5153 events. 3209/5153 cut-off events. For 1249418/1249420 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30978 event pairs, 680 based on Foata normal form. 4/5156 useless extension candidates. Maximal degree in co-relation 57718. Up to 4716 conditions per place. [2024-06-14 12:28:19,982 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 58 changer transitions 0/612 dead transitions. [2024-06-14 12:28:19,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 612 transitions, 8504 flow [2024-06-14 12:28:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:28:19,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:28:19,983 INFO L175 Difference]: Start difference. First operand has 400 places, 590 transitions, 7216 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:28:19,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 612 transitions, 8504 flow [2024-06-14 12:28:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 612 transitions, 8282 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-14 12:28:24,446 INFO L231 Difference]: Finished difference. Result has 404 places, 590 transitions, 7115 flow [2024-06-14 12:28:24,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7115, PETRI_PLACES=404, PETRI_TRANSITIONS=590} [2024-06-14 12:28:24,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-14 12:28:24,446 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 590 transitions, 7115 flow [2024-06-14 12:28:24,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:24,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:24,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:24,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:28:24,447 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:24,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1156441020, now seen corresponding path program 4 times [2024-06-14 12:28:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:24,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504248830] [2024-06-14 12:28:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:24,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:25,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:25,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504248830] [2024-06-14 12:28:25,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504248830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:25,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:25,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:25,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817476785] [2024-06-14 12:28:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:25,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:25,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:25,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 590 transitions, 7115 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:25,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:25,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:25,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:26,844 INFO L124 PetriNetUnfolderBase]: 3217/5162 cut-off events. [2024-06-14 12:28:26,844 INFO L125 PetriNetUnfolderBase]: For 1265842/1265842 co-relation queries the response was YES. [2024-06-14 12:28:26,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58067 conditions, 5162 events. 3217/5162 cut-off events. For 1265842/1265842 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30985 event pairs, 676 based on Foata normal form. 2/5163 useless extension candidates. Maximal degree in co-relation 57884. Up to 4699 conditions per place. [2024-06-14 12:28:26,932 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 532 selfloop transitions, 72 changer transitions 0/609 dead transitions. [2024-06-14 12:28:26,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 609 transitions, 8455 flow [2024-06-14 12:28:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:28:26,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:28:26,933 INFO L175 Difference]: Start difference. First operand has 404 places, 590 transitions, 7115 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:28:26,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 609 transitions, 8455 flow [2024-06-14 12:28:32,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 609 transitions, 8290 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 12:28:32,265 INFO L231 Difference]: Finished difference. Result has 404 places, 592 transitions, 7181 flow [2024-06-14 12:28:32,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7181, PETRI_PLACES=404, PETRI_TRANSITIONS=592} [2024-06-14 12:28:32,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-14 12:28:32,265 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 592 transitions, 7181 flow [2024-06-14 12:28:32,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:32,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:32,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:32,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:28:32,266 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:32,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash 181693660, now seen corresponding path program 5 times [2024-06-14 12:28:32,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693994978] [2024-06-14 12:28:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:32,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693994978] [2024-06-14 12:28:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693994978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:33,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797535513] [2024-06-14 12:28:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:33,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:33,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:33,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:33,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 592 transitions, 7181 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:33,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:33,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:33,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:34,801 INFO L124 PetriNetUnfolderBase]: 3225/5174 cut-off events. [2024-06-14 12:28:34,802 INFO L125 PetriNetUnfolderBase]: For 1284848/1284848 co-relation queries the response was YES. [2024-06-14 12:28:34,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58458 conditions, 5174 events. 3225/5174 cut-off events. For 1284848/1284848 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31047 event pairs, 678 based on Foata normal form. 2/5175 useless extension candidates. Maximal degree in co-relation 58274. Up to 4711 conditions per place. [2024-06-14 12:28:34,878 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 540 selfloop transitions, 66 changer transitions 0/611 dead transitions. [2024-06-14 12:28:34,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 611 transitions, 8529 flow [2024-06-14 12:28:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:28:34,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:28:34,879 INFO L175 Difference]: Start difference. First operand has 404 places, 592 transitions, 7181 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:28:34,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 611 transitions, 8529 flow [2024-06-14 12:28:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 611 transitions, 8314 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:41,168 INFO L231 Difference]: Finished difference. Result has 406 places, 594 transitions, 7189 flow [2024-06-14 12:28:41,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7189, PETRI_PLACES=406, PETRI_TRANSITIONS=594} [2024-06-14 12:28:41,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 12:28:41,169 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 594 transitions, 7189 flow [2024-06-14 12:28:41,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:41,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:41,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:41,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:28:41,169 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:41,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1145389830, now seen corresponding path program 6 times [2024-06-14 12:28:41,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:41,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391167747] [2024-06-14 12:28:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:41,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:42,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391167747] [2024-06-14 12:28:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391167747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444027686] [2024-06-14 12:28:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:42,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:42,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:28:42,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 594 transitions, 7189 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:42,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:42,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:28:42,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:43,614 INFO L124 PetriNetUnfolderBase]: 3233/5186 cut-off events. [2024-06-14 12:28:43,614 INFO L125 PetriNetUnfolderBase]: For 1303086/1303086 co-relation queries the response was YES. [2024-06-14 12:28:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58756 conditions, 5186 events. 3233/5186 cut-off events. For 1303086/1303086 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 31140 event pairs, 676 based on Foata normal form. 2/5187 useless extension candidates. Maximal degree in co-relation 58571. Up to 4703 conditions per place. [2024-06-14 12:28:43,702 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 538 selfloop transitions, 71 changer transitions 0/614 dead transitions. [2024-06-14 12:28:43,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 614 transitions, 8549 flow [2024-06-14 12:28:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:28:43,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:28:43,704 INFO L175 Difference]: Start difference. First operand has 406 places, 594 transitions, 7189 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:28:43,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 614 transitions, 8549 flow [2024-06-14 12:28:48,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 614 transitions, 8375 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:28:48,456 INFO L231 Difference]: Finished difference. Result has 409 places, 596 transitions, 7252 flow [2024-06-14 12:28:48,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7252, PETRI_PLACES=409, PETRI_TRANSITIONS=596} [2024-06-14 12:28:48,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:28:48,456 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 596 transitions, 7252 flow [2024-06-14 12:28:48,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:48,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:48,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:48,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:28:48,456 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:48,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1156841199, now seen corresponding path program 1 times [2024-06-14 12:28:48,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:48,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985920311] [2024-06-14 12:28:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:48,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985920311] [2024-06-14 12:28:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985920311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:49,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:49,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:28:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59000582] [2024-06-14 12:28:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:49,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:28:49,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:49,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:28:49,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:28:49,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:49,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 596 transitions, 7252 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:49,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:49,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:49,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:51,070 INFO L124 PetriNetUnfolderBase]: 3013/4898 cut-off events. [2024-06-14 12:28:51,070 INFO L125 PetriNetUnfolderBase]: For 1321873/1321913 co-relation queries the response was YES. [2024-06-14 12:28:51,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57057 conditions, 4898 events. 3013/4898 cut-off events. For 1321873/1321913 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29907 event pairs, 627 based on Foata normal form. 5/4848 useless extension candidates. Maximal degree in co-relation 56871. Up to 4226 conditions per place. [2024-06-14 12:28:51,151 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 80 changer transitions 0/616 dead transitions. [2024-06-14 12:28:51,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 616 transitions, 8510 flow [2024-06-14 12:28:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:28:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:28:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:28:51,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:28:51,153 INFO L175 Difference]: Start difference. First operand has 409 places, 596 transitions, 7252 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:28:51,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 616 transitions, 8510 flow [2024-06-14 12:28:55,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 616 transitions, 8289 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:28:55,389 INFO L231 Difference]: Finished difference. Result has 412 places, 599 transitions, 7311 flow [2024-06-14 12:28:55,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7311, PETRI_PLACES=412, PETRI_TRANSITIONS=599} [2024-06-14 12:28:55,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 12:28:55,389 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 599 transitions, 7311 flow [2024-06-14 12:28:55,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:55,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:28:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:28:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:28:55,390 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:28:55,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:28:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 250847958, now seen corresponding path program 5 times [2024-06-14 12:28:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:28:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719668565] [2024-06-14 12:28:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:28:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:28:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:28:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:28:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:28:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719668565] [2024-06-14 12:28:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719668565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:28:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:28:56,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:28:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230985043] [2024-06-14 12:28:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:28:56,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:28:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:28:56,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:28:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:28:56,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:28:56,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 599 transitions, 7311 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:28:56,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:28:56,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:28:56,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:28:58,177 INFO L124 PetriNetUnfolderBase]: 3148/5108 cut-off events. [2024-06-14 12:28:58,177 INFO L125 PetriNetUnfolderBase]: For 1337433/1337433 co-relation queries the response was YES. [2024-06-14 12:28:58,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59055 conditions, 5108 events. 3148/5108 cut-off events. For 1337433/1337433 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 31216 event pairs, 643 based on Foata normal form. 1/5092 useless extension candidates. Maximal degree in co-relation 58868. Up to 4232 conditions per place. [2024-06-14 12:28:58,259 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 109 changer transitions 0/625 dead transitions. [2024-06-14 12:28:58,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 625 transitions, 8737 flow [2024-06-14 12:28:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:28:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:28:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:28:58,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:28:58,260 INFO L175 Difference]: Start difference. First operand has 412 places, 599 transitions, 7311 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:28:58,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 625 transitions, 8737 flow [2024-06-14 12:29:03,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 625 transitions, 8479 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 12:29:03,482 INFO L231 Difference]: Finished difference. Result has 413 places, 602 transitions, 7477 flow [2024-06-14 12:29:03,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7477, PETRI_PLACES=413, PETRI_TRANSITIONS=602} [2024-06-14 12:29:03,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-14 12:29:03,483 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 602 transitions, 7477 flow [2024-06-14 12:29:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:03,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:03,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:03,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:29:03,484 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:03,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1129651918, now seen corresponding path program 2 times [2024-06-14 12:29:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865375470] [2024-06-14 12:29:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:03,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:04,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865375470] [2024-06-14 12:29:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865375470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:04,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:04,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:04,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007408720] [2024-06-14 12:29:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:04,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:04,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 602 transitions, 7477 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:04,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:04,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:04,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:06,099 INFO L124 PetriNetUnfolderBase]: 3253/5222 cut-off events. [2024-06-14 12:29:06,099 INFO L125 PetriNetUnfolderBase]: For 1362567/1362571 co-relation queries the response was YES. [2024-06-14 12:29:06,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60351 conditions, 5222 events. 3253/5222 cut-off events. For 1362567/1362571 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31486 event pairs, 689 based on Foata normal form. 5/5226 useless extension candidates. Maximal degree in co-relation 60163. Up to 4752 conditions per place. [2024-06-14 12:29:06,186 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 565 selfloop transitions, 55 changer transitions 0/625 dead transitions. [2024-06-14 12:29:06,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 625 transitions, 8941 flow [2024-06-14 12:29:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:29:06,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:29:06,187 INFO L175 Difference]: Start difference. First operand has 413 places, 602 transitions, 7477 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:29:06,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 625 transitions, 8941 flow [2024-06-14 12:29:11,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 625 transitions, 8537 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:11,907 INFO L231 Difference]: Finished difference. Result has 415 places, 605 transitions, 7345 flow [2024-06-14 12:29:11,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7345, PETRI_PLACES=415, PETRI_TRANSITIONS=605} [2024-06-14 12:29:11,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 12:29:11,907 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 605 transitions, 7345 flow [2024-06-14 12:29:11,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:11,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:11,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:11,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:29:11,908 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:11,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:11,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1129651546, now seen corresponding path program 6 times [2024-06-14 12:29:11,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125784378] [2024-06-14 12:29:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:11,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:13,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:13,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125784378] [2024-06-14 12:29:13,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125784378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:13,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:13,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476533894] [2024-06-14 12:29:13,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:13,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:13,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 605 transitions, 7345 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:13,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:13,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:13,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:14,489 INFO L124 PetriNetUnfolderBase]: 3158/5120 cut-off events. [2024-06-14 12:29:14,489 INFO L125 PetriNetUnfolderBase]: For 1388429/1388429 co-relation queries the response was YES. [2024-06-14 12:29:14,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60076 conditions, 5120 events. 3158/5120 cut-off events. For 1388429/1388429 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31284 event pairs, 643 based on Foata normal form. 1/5104 useless extension candidates. Maximal degree in co-relation 59887. Up to 4238 conditions per place. [2024-06-14 12:29:14,576 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 114 changer transitions 0/628 dead transitions. [2024-06-14 12:29:14,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 628 transitions, 8769 flow [2024-06-14 12:29:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:29:14,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:29:14,576 INFO L175 Difference]: Start difference. First operand has 415 places, 605 transitions, 7345 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:29:14,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 628 transitions, 8769 flow [2024-06-14 12:29:20,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 628 transitions, 8519 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:20,796 INFO L231 Difference]: Finished difference. Result has 417 places, 608 transitions, 7537 flow [2024-06-14 12:29:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7095, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7537, PETRI_PLACES=417, PETRI_TRANSITIONS=608} [2024-06-14 12:29:20,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 12:29:20,796 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 608 transitions, 7537 flow [2024-06-14 12:29:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:20,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:29:20,797 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:20,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1640615338, now seen corresponding path program 7 times [2024-06-14 12:29:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618540516] [2024-06-14 12:29:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:21,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:21,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618540516] [2024-06-14 12:29:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618540516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:21,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:21,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891948676] [2024-06-14 12:29:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:21,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:21,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:21,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:21,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 608 transitions, 7537 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:21,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:21,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:21,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:23,293 INFO L124 PetriNetUnfolderBase]: 3174/5150 cut-off events. [2024-06-14 12:29:23,294 INFO L125 PetriNetUnfolderBase]: For 1418235/1418235 co-relation queries the response was YES. [2024-06-14 12:29:23,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60986 conditions, 5150 events. 3174/5150 cut-off events. For 1418235/1418235 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31486 event pairs, 644 based on Foata normal form. 1/5134 useless extension candidates. Maximal degree in co-relation 60796. Up to 4263 conditions per place. [2024-06-14 12:29:23,382 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 484 selfloop transitions, 100 changer transitions 0/638 dead transitions. [2024-06-14 12:29:23,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 638 transitions, 9040 flow [2024-06-14 12:29:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:29:23,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 12:29:23,383 INFO L175 Difference]: Start difference. First operand has 417 places, 608 transitions, 7537 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:29:23,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 638 transitions, 9040 flow [2024-06-14 12:29:29,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 638 transitions, 8614 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:29,565 INFO L231 Difference]: Finished difference. Result has 419 places, 614 transitions, 7563 flow [2024-06-14 12:29:29,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7563, PETRI_PLACES=419, PETRI_TRANSITIONS=614} [2024-06-14 12:29:29,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 12:29:29,565 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 614 transitions, 7563 flow [2024-06-14 12:29:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:29,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:29,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:29,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:29:29,566 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:29,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash -174799086, now seen corresponding path program 8 times [2024-06-14 12:29:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:29,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880885874] [2024-06-14 12:29:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:29,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:30,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:30,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880885874] [2024-06-14 12:29:30,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880885874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:30,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:30,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:30,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449578506] [2024-06-14 12:29:30,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:30,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:30,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:30,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:30,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 614 transitions, 7563 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:30,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:30,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:30,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:32,076 INFO L124 PetriNetUnfolderBase]: 3187/5170 cut-off events. [2024-06-14 12:29:32,076 INFO L125 PetriNetUnfolderBase]: For 1458753/1458753 co-relation queries the response was YES. [2024-06-14 12:29:32,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61958 conditions, 5170 events. 3187/5170 cut-off events. For 1458753/1458753 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31636 event pairs, 606 based on Foata normal form. 1/5154 useless extension candidates. Maximal degree in co-relation 61767. Up to 4271 conditions per place. [2024-06-14 12:29:32,165 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 480 selfloop transitions, 108 changer transitions 0/642 dead transitions. [2024-06-14 12:29:32,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 642 transitions, 9512 flow [2024-06-14 12:29:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:29:32,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 12:29:32,166 INFO L175 Difference]: Start difference. First operand has 419 places, 614 transitions, 7563 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:29:32,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 642 transitions, 9512 flow [2024-06-14 12:29:37,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 642 transitions, 9116 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:37,741 INFO L231 Difference]: Finished difference. Result has 422 places, 620 transitions, 7823 flow [2024-06-14 12:29:37,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7167, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7823, PETRI_PLACES=422, PETRI_TRANSITIONS=620} [2024-06-14 12:29:37,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-14 12:29:37,741 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 620 transitions, 7823 flow [2024-06-14 12:29:37,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:37,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:37,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:29:37,741 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:37,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1934305858, now seen corresponding path program 3 times [2024-06-14 12:29:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910288157] [2024-06-14 12:29:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:38,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910288157] [2024-06-14 12:29:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910288157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:38,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:38,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57687165] [2024-06-14 12:29:38,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:38,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:38,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:29:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 620 transitions, 7823 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:29:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:40,571 INFO L124 PetriNetUnfolderBase]: 3292/5284 cut-off events. [2024-06-14 12:29:40,572 INFO L125 PetriNetUnfolderBase]: For 1483640/1483644 co-relation queries the response was YES. [2024-06-14 12:29:40,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63070 conditions, 5284 events. 3292/5284 cut-off events. For 1483640/1483644 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31965 event pairs, 690 based on Foata normal form. 5/5288 useless extension candidates. Maximal degree in co-relation 62878. Up to 4807 conditions per place. [2024-06-14 12:29:40,657 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 588 selfloop transitions, 51 changer transitions 0/644 dead transitions. [2024-06-14 12:29:40,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 644 transitions, 9344 flow [2024-06-14 12:29:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:29:40,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:29:40,658 INFO L175 Difference]: Start difference. First operand has 422 places, 620 transitions, 7823 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:29:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 644 transitions, 9344 flow [2024-06-14 12:29:46,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 644 transitions, 8990 flow, removed 121 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:46,112 INFO L231 Difference]: Finished difference. Result has 426 places, 623 transitions, 7745 flow [2024-06-14 12:29:46,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7469, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7745, PETRI_PLACES=426, PETRI_TRANSITIONS=623} [2024-06-14 12:29:46,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 12:29:46,113 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 623 transitions, 7745 flow [2024-06-14 12:29:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:46,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:46,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:46,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:29:46,113 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:46,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1325377888, now seen corresponding path program 9 times [2024-06-14 12:29:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:46,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245149834] [2024-06-14 12:29:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:46,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:47,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:47,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245149834] [2024-06-14 12:29:47,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245149834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:47,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:47,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:47,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053302196] [2024-06-14 12:29:47,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:47,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:47,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:47,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:47,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:47,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:47,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 623 transitions, 7745 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:47,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:47,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:47,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:48,609 INFO L124 PetriNetUnfolderBase]: 3197/5188 cut-off events. [2024-06-14 12:29:48,609 INFO L125 PetriNetUnfolderBase]: For 1509520/1509520 co-relation queries the response was YES. [2024-06-14 12:29:48,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63042 conditions, 5188 events. 3197/5188 cut-off events. For 1509520/1509520 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31847 event pairs, 643 based on Foata normal form. 1/5172 useless extension candidates. Maximal degree in co-relation 62848. Up to 4234 conditions per place. [2024-06-14 12:29:48,705 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 163 changer transitions 0/647 dead transitions. [2024-06-14 12:29:48,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 647 transitions, 9701 flow [2024-06-14 12:29:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:29:48,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:29:48,706 INFO L175 Difference]: Start difference. First operand has 426 places, 623 transitions, 7745 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:29:48,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 647 transitions, 9701 flow [2024-06-14 12:29:54,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 647 transitions, 9447 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:54,794 INFO L231 Difference]: Finished difference. Result has 428 places, 629 transitions, 8273 flow [2024-06-14 12:29:54,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7491, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8273, PETRI_PLACES=428, PETRI_TRANSITIONS=629} [2024-06-14 12:29:54,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 12:29:54,795 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 629 transitions, 8273 flow [2024-06-14 12:29:54,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:54,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:54,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:54,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:29:54,795 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:29:54,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1770311540, now seen corresponding path program 10 times [2024-06-14 12:29:54,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:54,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618419292] [2024-06-14 12:29:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:54,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618419292] [2024-06-14 12:29:55,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618419292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:55,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:55,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:29:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861368595] [2024-06-14 12:29:55,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:29:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:29:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:29:55,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:29:55,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 629 transitions, 8273 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:55,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:55,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:29:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:57,268 INFO L124 PetriNetUnfolderBase]: 3194/5184 cut-off events. [2024-06-14 12:29:57,268 INFO L125 PetriNetUnfolderBase]: For 1528377/1528377 co-relation queries the response was YES. [2024-06-14 12:29:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63504 conditions, 5184 events. 3194/5184 cut-off events. For 1528377/1528377 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31791 event pairs, 644 based on Foata normal form. 1/5168 useless extension candidates. Maximal degree in co-relation 63309. Up to 4289 conditions per place. [2024-06-14 12:29:57,360 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 497 selfloop transitions, 101 changer transitions 0/653 dead transitions. [2024-06-14 12:29:57,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 653 transitions, 9564 flow [2024-06-14 12:29:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:29:57,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:29:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:29:57,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 12:29:57,361 INFO L175 Difference]: Start difference. First operand has 428 places, 629 transitions, 8273 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:29:57,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 653 transitions, 9564 flow [2024-06-14 12:30:03,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 653 transitions, 9006 flow, removed 210 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:03,632 INFO L231 Difference]: Finished difference. Result has 432 places, 629 transitions, 7923 flow [2024-06-14 12:30:03,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7923, PETRI_PLACES=432, PETRI_TRANSITIONS=629} [2024-06-14 12:30:03,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 12:30:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 629 transitions, 7923 flow [2024-06-14 12:30:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:03,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:03,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:30:03,633 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:03,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash 605121600, now seen corresponding path program 4 times [2024-06-14 12:30:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162042031] [2024-06-14 12:30:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162042031] [2024-06-14 12:30:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162042031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112923833] [2024-06-14 12:30:04,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:04,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:04,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 629 transitions, 7923 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:04,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:04,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:04,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:06,330 INFO L124 PetriNetUnfolderBase]: 3307/5309 cut-off events. [2024-06-14 12:30:06,330 INFO L125 PetriNetUnfolderBase]: For 1541102/1541106 co-relation queries the response was YES. [2024-06-14 12:30:06,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64257 conditions, 5309 events. 3307/5309 cut-off events. For 1541102/1541106 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32082 event pairs, 647 based on Foata normal form. 5/5313 useless extension candidates. Maximal degree in co-relation 64060. Up to 4793 conditions per place. [2024-06-14 12:30:06,420 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 570 selfloop transitions, 82 changer transitions 0/657 dead transitions. [2024-06-14 12:30:06,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 657 transitions, 10335 flow [2024-06-14 12:30:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:30:06,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:30:06,421 INFO L175 Difference]: Start difference. First operand has 432 places, 629 transitions, 7923 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:30:06,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 657 transitions, 10335 flow [2024-06-14 12:30:13,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 657 transitions, 10095 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:30:13,066 INFO L231 Difference]: Finished difference. Result has 432 places, 638 transitions, 8363 flow [2024-06-14 12:30:13,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7683, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=432, PETRI_TRANSITIONS=638} [2024-06-14 12:30:13,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 12:30:13,066 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 638 transitions, 8363 flow [2024-06-14 12:30:13,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:13,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:13,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:13,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:30:13,067 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:13,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:13,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1893848076, now seen corresponding path program 5 times [2024-06-14 12:30:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:13,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31520002] [2024-06-14 12:30:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:14,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:14,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31520002] [2024-06-14 12:30:14,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31520002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:14,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:14,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269500304] [2024-06-14 12:30:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:14,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:14,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:14,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 638 transitions, 8363 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:14,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:14,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:14,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:15,799 INFO L124 PetriNetUnfolderBase]: 3304/5305 cut-off events. [2024-06-14 12:30:15,799 INFO L125 PetriNetUnfolderBase]: For 1558652/1558656 co-relation queries the response was YES. [2024-06-14 12:30:15,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64357 conditions, 5305 events. 3304/5305 cut-off events. For 1558652/1558656 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32097 event pairs, 689 based on Foata normal form. 5/5309 useless extension candidates. Maximal degree in co-relation 64159. Up to 4790 conditions per place. [2024-06-14 12:30:15,899 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 565 selfloop transitions, 86 changer transitions 0/656 dead transitions. [2024-06-14 12:30:15,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 656 transitions, 9999 flow [2024-06-14 12:30:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:30:15,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:30:15,900 INFO L175 Difference]: Start difference. First operand has 432 places, 638 transitions, 8363 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:30:15,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 656 transitions, 9999 flow [2024-06-14 12:30:21,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 656 transitions, 9583 flow, removed 178 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:21,976 INFO L231 Difference]: Finished difference. Result has 437 places, 638 transitions, 8125 flow [2024-06-14 12:30:21,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8125, PETRI_PLACES=437, PETRI_TRANSITIONS=638} [2024-06-14 12:30:21,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 12:30:21,977 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 638 transitions, 8125 flow [2024-06-14 12:30:21,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:21,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:21,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:21,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:30:21,978 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:21,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1455614002, now seen corresponding path program 13 times [2024-06-14 12:30:21,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:21,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563465594] [2024-06-14 12:30:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:22,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:22,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563465594] [2024-06-14 12:30:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563465594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:22,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:22,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:22,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703014809] [2024-06-14 12:30:22,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:22,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:22,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 638 transitions, 8125 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:22,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:22,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:22,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:24,667 INFO L124 PetriNetUnfolderBase]: 3314/5318 cut-off events. [2024-06-14 12:30:24,668 INFO L125 PetriNetUnfolderBase]: For 1584074/1584074 co-relation queries the response was YES. [2024-06-14 12:30:24,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64588 conditions, 5318 events. 3314/5318 cut-off events. For 1584074/1584074 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32163 event pairs, 682 based on Foata normal form. 2/5319 useless extension candidates. Maximal degree in co-relation 64388. Up to 4766 conditions per place. [2024-06-14 12:30:24,763 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 579 selfloop transitions, 79 changer transitions 0/663 dead transitions. [2024-06-14 12:30:24,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 663 transitions, 9684 flow [2024-06-14 12:30:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:30:24,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:30:24,764 INFO L175 Difference]: Start difference. First operand has 437 places, 638 transitions, 8125 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:30:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 663 transitions, 9684 flow [2024-06-14 12:30:30,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 663 transitions, 9520 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:30,396 INFO L231 Difference]: Finished difference. Result has 439 places, 641 transitions, 8285 flow [2024-06-14 12:30:30,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8285, PETRI_PLACES=439, PETRI_TRANSITIONS=641} [2024-06-14 12:30:30,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 12:30:30,396 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 641 transitions, 8285 flow [2024-06-14 12:30:30,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:30,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:30,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:30,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:30:30,397 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:30,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1779582369, now seen corresponding path program 5 times [2024-06-14 12:30:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:30,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742991456] [2024-06-14 12:30:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:30,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742991456] [2024-06-14 12:30:31,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742991456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:31,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:31,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:31,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441092145] [2024-06-14 12:30:31,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:31,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:31,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:31,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 641 transitions, 8285 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:31,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:31,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:31,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:32,838 INFO L124 PetriNetUnfolderBase]: 3308/5315 cut-off events. [2024-06-14 12:30:32,838 INFO L125 PetriNetUnfolderBase]: For 1586343/1586347 co-relation queries the response was YES. [2024-06-14 12:30:32,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64424 conditions, 5315 events. 3308/5315 cut-off events. For 1586343/1586347 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32186 event pairs, 682 based on Foata normal form. 6/5320 useless extension candidates. Maximal degree in co-relation 64223. Up to 4858 conditions per place. [2024-06-14 12:30:32,933 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 610 selfloop transitions, 47 changer transitions 0/662 dead transitions. [2024-06-14 12:30:32,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 662 transitions, 9707 flow [2024-06-14 12:30:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:30:32,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:30:32,934 INFO L175 Difference]: Start difference. First operand has 439 places, 641 transitions, 8285 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:30:32,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 662 transitions, 9707 flow [2024-06-14 12:30:38,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 662 transitions, 9331 flow, removed 111 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:38,958 INFO L231 Difference]: Finished difference. Result has 441 places, 642 transitions, 8036 flow [2024-06-14 12:30:38,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7925, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8036, PETRI_PLACES=441, PETRI_TRANSITIONS=642} [2024-06-14 12:30:38,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 12:30:38,959 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 642 transitions, 8036 flow [2024-06-14 12:30:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:38,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:38,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:38,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:30:38,959 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:38,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash -291765378, now seen corresponding path program 14 times [2024-06-14 12:30:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:38,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222072027] [2024-06-14 12:30:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:39,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222072027] [2024-06-14 12:30:39,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222072027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:39,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:39,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:39,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723339949] [2024-06-14 12:30:39,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:40,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 642 transitions, 8036 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:40,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:40,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:40,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:41,507 INFO L124 PetriNetUnfolderBase]: 3318/5326 cut-off events. [2024-06-14 12:30:41,507 INFO L125 PetriNetUnfolderBase]: For 1603982/1603982 co-relation queries the response was YES. [2024-06-14 12:30:41,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64428 conditions, 5326 events. 3318/5326 cut-off events. For 1603982/1603982 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32211 event pairs, 673 based on Foata normal form. 2/5327 useless extension candidates. Maximal degree in co-relation 64226. Up to 4717 conditions per place. [2024-06-14 12:30:41,608 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 93 changer transitions 0/667 dead transitions. [2024-06-14 12:30:41,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 667 transitions, 9891 flow [2024-06-14 12:30:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:30:41,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:30:41,609 INFO L175 Difference]: Start difference. First operand has 441 places, 642 transitions, 8036 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:30:41,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 667 transitions, 9891 flow [2024-06-14 12:30:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 667 transitions, 9791 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:47,252 INFO L231 Difference]: Finished difference. Result has 443 places, 645 transitions, 8288 flow [2024-06-14 12:30:47,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8288, PETRI_PLACES=443, PETRI_TRANSITIONS=645} [2024-06-14 12:30:47,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-14 12:30:47,253 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 645 transitions, 8288 flow [2024-06-14 12:30:47,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:47,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:47,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:47,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:30:47,253 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:47,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1636603132, now seen corresponding path program 15 times [2024-06-14 12:30:47,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:47,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961689679] [2024-06-14 12:30:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:48,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961689679] [2024-06-14 12:30:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961689679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967243877] [2024-06-14 12:30:48,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:48,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:48,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 645 transitions, 8288 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:48,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:48,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:48,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:49,714 INFO L124 PetriNetUnfolderBase]: 3312/5320 cut-off events. [2024-06-14 12:30:49,714 INFO L125 PetriNetUnfolderBase]: For 1604999/1604999 co-relation queries the response was YES. [2024-06-14 12:30:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64311 conditions, 5320 events. 3312/5320 cut-off events. For 1604999/1604999 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32204 event pairs, 633 based on Foata normal form. 2/5321 useless extension candidates. Maximal degree in co-relation 64108. Up to 4712 conditions per place. [2024-06-14 12:30:49,806 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 92 changer transitions 0/666 dead transitions. [2024-06-14 12:30:49,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 666 transitions, 9701 flow [2024-06-14 12:30:49,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:30:49,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:30:49,807 INFO L175 Difference]: Start difference. First operand has 443 places, 645 transitions, 8288 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:30:49,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 666 transitions, 9701 flow [2024-06-14 12:30:55,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 666 transitions, 8799 flow, removed 137 selfloop flow, removed 11 redundant places. [2024-06-14 12:30:55,887 INFO L231 Difference]: Finished difference. Result has 441 places, 645 transitions, 7576 flow [2024-06-14 12:30:55,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7386, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7576, PETRI_PLACES=441, PETRI_TRANSITIONS=645} [2024-06-14 12:30:55,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 12:30:55,888 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 645 transitions, 7576 flow [2024-06-14 12:30:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:55,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:55,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:30:55,889 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:30:55,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash -123165279, now seen corresponding path program 6 times [2024-06-14 12:30:55,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:55,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949333598] [2024-06-14 12:30:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:56,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949333598] [2024-06-14 12:30:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949333598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644619114] [2024-06-14 12:30:56,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:56,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:56,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:30:56,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 645 transitions, 7576 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:56,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:30:56,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:58,408 INFO L124 PetriNetUnfolderBase]: 3338/5357 cut-off events. [2024-06-14 12:30:58,408 INFO L125 PetriNetUnfolderBase]: For 1642278/1642282 co-relation queries the response was YES. [2024-06-14 12:30:58,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64148 conditions, 5357 events. 3338/5357 cut-off events. For 1642278/1642282 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32513 event pairs, 631 based on Foata normal form. 6/5362 useless extension candidates. Maximal degree in co-relation 63946. Up to 4763 conditions per place. [2024-06-14 12:30:58,504 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 586 selfloop transitions, 82 changer transitions 0/673 dead transitions. [2024-06-14 12:30:58,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 673 transitions, 9574 flow [2024-06-14 12:30:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:30:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:30:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:30:58,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:30:58,505 INFO L175 Difference]: Start difference. First operand has 441 places, 645 transitions, 7576 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:30:58,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 673 transitions, 9574 flow [2024-06-14 12:31:03,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 673 transitions, 9338 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:31:03,958 INFO L231 Difference]: Finished difference. Result has 442 places, 654 transitions, 7861 flow [2024-06-14 12:31:03,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7861, PETRI_PLACES=442, PETRI_TRANSITIONS=654} [2024-06-14 12:31:03,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 12:31:03,958 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 654 transitions, 7861 flow [2024-06-14 12:31:03,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:03,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:03,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:03,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:31:03,958 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:03,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 755627676, now seen corresponding path program 16 times [2024-06-14 12:31:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:03,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105227392] [2024-06-14 12:31:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:03,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105227392] [2024-06-14 12:31:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105227392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:04,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:04,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:04,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369758345] [2024-06-14 12:31:04,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:04,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:04,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:05,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 654 transitions, 7861 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:05,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:05,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:05,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:06,644 INFO L124 PetriNetUnfolderBase]: 3380/5422 cut-off events. [2024-06-14 12:31:06,644 INFO L125 PetriNetUnfolderBase]: For 1724647/1724647 co-relation queries the response was YES. [2024-06-14 12:31:06,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66564 conditions, 5422 events. 3380/5422 cut-off events. For 1724647/1724647 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32908 event pairs, 672 based on Foata normal form. 2/5423 useless extension candidates. Maximal degree in co-relation 66360. Up to 4554 conditions per place. [2024-06-14 12:31:06,732 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 528 selfloop transitions, 150 changer transitions 0/683 dead transitions. [2024-06-14 12:31:06,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 683 transitions, 10467 flow [2024-06-14 12:31:06,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:31:06,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:31:06,733 INFO L175 Difference]: Start difference. First operand has 442 places, 654 transitions, 7861 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:31:06,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 683 transitions, 10467 flow [2024-06-14 12:31:11,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 683 transitions, 10254 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:11,682 INFO L231 Difference]: Finished difference. Result has 447 places, 663 transitions, 8560 flow [2024-06-14 12:31:11,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8560, PETRI_PLACES=447, PETRI_TRANSITIONS=663} [2024-06-14 12:31:11,683 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-14 12:31:11,683 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 663 transitions, 8560 flow [2024-06-14 12:31:11,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:11,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:11,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:11,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:31:11,683 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:11,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash 768514686, now seen corresponding path program 17 times [2024-06-14 12:31:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:11,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712683935] [2024-06-14 12:31:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:12,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:12,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712683935] [2024-06-14 12:31:12,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712683935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:12,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356431043] [2024-06-14 12:31:12,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:12,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:12,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:12,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:12,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 663 transitions, 8560 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:12,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:12,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:12,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:14,282 INFO L124 PetriNetUnfolderBase]: 3374/5430 cut-off events. [2024-06-14 12:31:14,282 INFO L125 PetriNetUnfolderBase]: For 1733996/1733996 co-relation queries the response was YES. [2024-06-14 12:31:14,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66876 conditions, 5430 events. 3374/5430 cut-off events. For 1733996/1733996 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33125 event pairs, 614 based on Foata normal form. 2/5431 useless extension candidates. Maximal degree in co-relation 66670. Up to 4549 conditions per place. [2024-06-14 12:31:14,377 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 166 changer transitions 0/682 dead transitions. [2024-06-14 12:31:14,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 682 transitions, 10280 flow [2024-06-14 12:31:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:31:14,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:31:14,378 INFO L175 Difference]: Start difference. First operand has 447 places, 663 transitions, 8560 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:31:14,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 682 transitions, 10280 flow [2024-06-14 12:31:20,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 682 transitions, 9706 flow, removed 208 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:20,150 INFO L231 Difference]: Finished difference. Result has 452 places, 663 transitions, 8324 flow [2024-06-14 12:31:20,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7986, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8324, PETRI_PLACES=452, PETRI_TRANSITIONS=663} [2024-06-14 12:31:20,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-14 12:31:20,150 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 663 transitions, 8324 flow [2024-06-14 12:31:20,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:20,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:20,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:20,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:31:20,151 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:20,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:20,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1177349253, now seen corresponding path program 7 times [2024-06-14 12:31:20,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:20,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672275455] [2024-06-14 12:31:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:20,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:21,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:21,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672275455] [2024-06-14 12:31:21,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672275455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:21,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:21,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774972435] [2024-06-14 12:31:21,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:21,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:21,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 663 transitions, 8324 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:21,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:21,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:21,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:22,702 INFO L124 PetriNetUnfolderBase]: 3384/5433 cut-off events. [2024-06-14 12:31:22,702 INFO L125 PetriNetUnfolderBase]: For 1745352/1745356 co-relation queries the response was YES. [2024-06-14 12:31:22,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66997 conditions, 5433 events. 3384/5433 cut-off events. For 1745352/1745356 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33062 event pairs, 664 based on Foata normal form. 6/5438 useless extension candidates. Maximal degree in co-relation 66789. Up to 4823 conditions per place. [2024-06-14 12:31:22,800 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 584 selfloop transitions, 96 changer transitions 0/685 dead transitions. [2024-06-14 12:31:22,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 685 transitions, 10166 flow [2024-06-14 12:31:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:31:22,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:31:22,801 INFO L175 Difference]: Start difference. First operand has 452 places, 663 transitions, 8324 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:31:22,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 685 transitions, 10166 flow [2024-06-14 12:31:29,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 685 transitions, 9807 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:29,182 INFO L231 Difference]: Finished difference. Result has 453 places, 666 transitions, 8277 flow [2024-06-14 12:31:29,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8277, PETRI_PLACES=453, PETRI_TRANSITIONS=666} [2024-06-14 12:31:29,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 12:31:29,183 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 666 transitions, 8277 flow [2024-06-14 12:31:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:29,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:31:29,183 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:29,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1130872882, now seen corresponding path program 18 times [2024-06-14 12:31:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188745621] [2024-06-14 12:31:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:30,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188745621] [2024-06-14 12:31:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188745621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:30,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:30,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:30,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033279361] [2024-06-14 12:31:30,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:30,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:30,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:30,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 666 transitions, 8277 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:30,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:30,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:30,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:31,767 INFO L124 PetriNetUnfolderBase]: 3378/5420 cut-off events. [2024-06-14 12:31:31,768 INFO L125 PetriNetUnfolderBase]: For 1743904/1743904 co-relation queries the response was YES. [2024-06-14 12:31:31,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66470 conditions, 5420 events. 3378/5420 cut-off events. For 1743904/1743904 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 32868 event pairs, 674 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 66261. Up to 4558 conditions per place. [2024-06-14 12:31:31,865 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 528 selfloop transitions, 151 changer transitions 0/684 dead transitions. [2024-06-14 12:31:31,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 684 transitions, 9713 flow [2024-06-14 12:31:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:31:31,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:31:31,866 INFO L175 Difference]: Start difference. First operand has 453 places, 666 transitions, 8277 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:31:31,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 684 transitions, 9713 flow [2024-06-14 12:31:38,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 684 transitions, 9293 flow, removed 127 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:38,714 INFO L231 Difference]: Finished difference. Result has 456 places, 666 transitions, 8165 flow [2024-06-14 12:31:38,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7857, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8165, PETRI_PLACES=456, PETRI_TRANSITIONS=666} [2024-06-14 12:31:38,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-14 12:31:38,714 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 666 transitions, 8165 flow [2024-06-14 12:31:38,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:38,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:38,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:38,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:31:38,715 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:38,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -110278269, now seen corresponding path program 8 times [2024-06-14 12:31:38,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:38,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625766729] [2024-06-14 12:31:38,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:38,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:39,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:39,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625766729] [2024-06-14 12:31:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625766729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:39,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:39,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933094810] [2024-06-14 12:31:39,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:39,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:39,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 666 transitions, 8165 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:39,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:39,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:39,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:41,303 INFO L124 PetriNetUnfolderBase]: 3372/5417 cut-off events. [2024-06-14 12:31:41,303 INFO L125 PetriNetUnfolderBase]: For 1740321/1740325 co-relation queries the response was YES. [2024-06-14 12:31:41,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66079 conditions, 5417 events. 3372/5417 cut-off events. For 1740321/1740325 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 32946 event pairs, 625 based on Foata normal form. 6/5422 useless extension candidates. Maximal degree in co-relation 65869. Up to 4810 conditions per place. [2024-06-14 12:31:41,568 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 586 selfloop transitions, 93 changer transitions 0/684 dead transitions. [2024-06-14 12:31:41,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 684 transitions, 9601 flow [2024-06-14 12:31:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:31:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:31:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:31:41,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 12:31:41,569 INFO L175 Difference]: Start difference. First operand has 456 places, 666 transitions, 8165 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:31:41,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 684 transitions, 9601 flow [2024-06-14 12:31:47,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 684 transitions, 9197 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:47,803 INFO L231 Difference]: Finished difference. Result has 458 places, 666 transitions, 7953 flow [2024-06-14 12:31:47,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7953, PETRI_PLACES=458, PETRI_TRANSITIONS=666} [2024-06-14 12:31:47,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 12:31:47,804 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 666 transitions, 7953 flow [2024-06-14 12:31:47,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:47,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:47,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:47,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:31:47,804 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:47,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash -677254116, now seen corresponding path program 19 times [2024-06-14 12:31:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637894562] [2024-06-14 12:31:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637894562] [2024-06-14 12:31:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637894562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:48,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:48,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305003739] [2024-06-14 12:31:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:48,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:48,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 666 transitions, 7953 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:48,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:48,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:48,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:50,405 INFO L124 PetriNetUnfolderBase]: 3422/5501 cut-off events. [2024-06-14 12:31:50,405 INFO L125 PetriNetUnfolderBase]: For 1831659/1831661 co-relation queries the response was YES. [2024-06-14 12:31:50,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68356 conditions, 5501 events. 3422/5501 cut-off events. For 1831659/1831661 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33578 event pairs, 703 based on Foata normal form. 4/5504 useless extension candidates. Maximal degree in co-relation 68145. Up to 4192 conditions per place. [2024-06-14 12:31:50,503 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 260 changer transitions 0/697 dead transitions. [2024-06-14 12:31:50,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 697 transitions, 11121 flow [2024-06-14 12:31:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:31:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:31:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:31:50,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:31:50,504 INFO L175 Difference]: Start difference. First operand has 458 places, 666 transitions, 7953 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:31:50,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 697 transitions, 11121 flow [2024-06-14 12:31:57,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 697 transitions, 10957 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:31:57,274 INFO L231 Difference]: Finished difference. Result has 459 places, 678 transitions, 9145 flow [2024-06-14 12:31:57,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9145, PETRI_PLACES=459, PETRI_TRANSITIONS=678} [2024-06-14 12:31:57,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 12:31:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 678 transitions, 9145 flow [2024-06-14 12:31:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:57,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:31:57,275 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:31:57,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:57,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1574779210, now seen corresponding path program 20 times [2024-06-14 12:31:57,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571819950] [2024-06-14 12:31:57,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:57,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:31:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571819950] [2024-06-14 12:31:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571819950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:58,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:58,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943179222] [2024-06-14 12:31:58,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:58,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:31:58,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 678 transitions, 9145 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:58,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:58,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:31:58,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:59,922 INFO L124 PetriNetUnfolderBase]: 3448/5539 cut-off events. [2024-06-14 12:31:59,923 INFO L125 PetriNetUnfolderBase]: For 1897658/1897660 co-relation queries the response was YES. [2024-06-14 12:31:59,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70585 conditions, 5539 events. 3448/5539 cut-off events. For 1897658/1897660 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 33895 event pairs, 660 based on Foata normal form. 4/5542 useless extension candidates. Maximal degree in co-relation 70373. Up to 4217 conditions per place. [2024-06-14 12:32:00,026 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 433 selfloop transitions, 265 changer transitions 0/703 dead transitions. [2024-06-14 12:32:00,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 703 transitions, 11931 flow [2024-06-14 12:32:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:32:00,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:32:00,027 INFO L175 Difference]: Start difference. First operand has 459 places, 678 transitions, 9145 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:32:00,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 703 transitions, 11931 flow [2024-06-14 12:32:07,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 703 transitions, 11111 flow, removed 224 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:07,062 INFO L231 Difference]: Finished difference. Result has 464 places, 684 transitions, 9285 flow [2024-06-14 12:32:07,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8427, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9285, PETRI_PLACES=464, PETRI_TRANSITIONS=684} [2024-06-14 12:32:07,063 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-14 12:32:07,063 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 684 transitions, 9285 flow [2024-06-14 12:32:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:07,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:07,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:32:07,063 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:07,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:07,063 INFO L85 PathProgramCache]: Analyzing trace with hash 787366114, now seen corresponding path program 21 times [2024-06-14 12:32:07,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648084428] [2024-06-14 12:32:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:07,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:08,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:08,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648084428] [2024-06-14 12:32:08,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648084428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:08,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:08,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81454633] [2024-06-14 12:32:08,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:08,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:08,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:08,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 684 transitions, 9285 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:08,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:08,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:08,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:09,677 INFO L124 PetriNetUnfolderBase]: 3458/5559 cut-off events. [2024-06-14 12:32:09,677 INFO L125 PetriNetUnfolderBase]: For 1887697/1887699 co-relation queries the response was YES. [2024-06-14 12:32:09,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69781 conditions, 5559 events. 3458/5559 cut-off events. For 1887697/1887699 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34024 event pairs, 710 based on Foata normal form. 4/5562 useless extension candidates. Maximal degree in co-relation 69568. Up to 4227 conditions per place. [2024-06-14 12:32:09,780 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 420 selfloop transitions, 280 changer transitions 0/705 dead transitions. [2024-06-14 12:32:09,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 705 transitions, 11543 flow [2024-06-14 12:32:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:32:09,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:32:09,780 INFO L175 Difference]: Start difference. First operand has 464 places, 684 transitions, 9285 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:32:09,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 705 transitions, 11543 flow [2024-06-14 12:32:17,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 705 transitions, 10948 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:17,978 INFO L231 Difference]: Finished difference. Result has 469 places, 687 transitions, 9442 flow [2024-06-14 12:32:17,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9442, PETRI_PLACES=469, PETRI_TRANSITIONS=687} [2024-06-14 12:32:17,979 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-14 12:32:17,979 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 687 transitions, 9442 flow [2024-06-14 12:32:17,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:17,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:17,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:17,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:32:17,979 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:17,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash 787377677, now seen corresponding path program 9 times [2024-06-14 12:32:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:17,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264488795] [2024-06-14 12:32:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264488795] [2024-06-14 12:32:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264488795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:19,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:19,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421773728] [2024-06-14 12:32:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:19,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:19,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:19,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 687 transitions, 9442 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:20,708 INFO L124 PetriNetUnfolderBase]: 3492/5596 cut-off events. [2024-06-14 12:32:20,709 INFO L125 PetriNetUnfolderBase]: For 1950183/1950189 co-relation queries the response was YES. [2024-06-14 12:32:20,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71012 conditions, 5596 events. 3492/5596 cut-off events. For 1950183/1950189 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34203 event pairs, 631 based on Foata normal form. 8/5603 useless extension candidates. Maximal degree in co-relation 70798. Up to 4708 conditions per place. [2024-06-14 12:32:20,803 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 560 selfloop transitions, 162 changer transitions 0/727 dead transitions. [2024-06-14 12:32:20,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 727 transitions, 12109 flow [2024-06-14 12:32:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:32:20,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:32:20,804 INFO L175 Difference]: Start difference. First operand has 469 places, 687 transitions, 9442 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:32:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 727 transitions, 12109 flow [2024-06-14 12:32:28,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 727 transitions, 11150 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-14 12:32:28,623 INFO L231 Difference]: Finished difference. Result has 471 places, 709 transitions, 9531 flow [2024-06-14 12:32:28,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8483, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9531, PETRI_PLACES=471, PETRI_TRANSITIONS=709} [2024-06-14 12:32:28,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-14 12:32:28,623 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 709 transitions, 9531 flow [2024-06-14 12:32:28,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:28,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:28,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:32:28,623 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:28,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 787377274, now seen corresponding path program 22 times [2024-06-14 12:32:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:28,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846196855] [2024-06-14 12:32:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:29,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:29,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846196855] [2024-06-14 12:32:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846196855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:29,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358158264] [2024-06-14 12:32:29,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:29,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 709 transitions, 9531 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:29,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:29,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:29,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:31,391 INFO L124 PetriNetUnfolderBase]: 3502/5620 cut-off events. [2024-06-14 12:32:31,391 INFO L125 PetriNetUnfolderBase]: For 1977552/1977554 co-relation queries the response was YES. [2024-06-14 12:32:31,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71076 conditions, 5620 events. 3502/5620 cut-off events. For 1977552/1977554 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34409 event pairs, 699 based on Foata normal form. 4/5623 useless extension candidates. Maximal degree in co-relation 70860. Up to 4284 conditions per place. [2024-06-14 12:32:31,497 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 441 selfloop transitions, 284 changer transitions 0/730 dead transitions. [2024-06-14 12:32:31,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 730 transitions, 11819 flow [2024-06-14 12:32:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:32:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:32:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:32:31,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-14 12:32:31,498 INFO L175 Difference]: Start difference. First operand has 471 places, 709 transitions, 9531 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:32:31,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 730 transitions, 11819 flow [2024-06-14 12:32:39,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 730 transitions, 11548 flow, removed 118 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:39,072 INFO L231 Difference]: Finished difference. Result has 478 places, 712 transitions, 9992 flow [2024-06-14 12:32:39,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9260, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9992, PETRI_PLACES=478, PETRI_TRANSITIONS=712} [2024-06-14 12:32:39,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-14 12:32:39,072 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 712 transitions, 9992 flow [2024-06-14 12:32:39,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:39,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:39,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:32:39,073 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:39,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash -408732147, now seen corresponding path program 10 times [2024-06-14 12:32:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:39,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166182220] [2024-06-14 12:32:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:39,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166182220] [2024-06-14 12:32:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166182220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:40,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:40,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:40,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229754766] [2024-06-14 12:32:40,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:40,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:40,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 712 transitions, 9992 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:40,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:40,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:40,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:41,707 INFO L124 PetriNetUnfolderBase]: 3512/5624 cut-off events. [2024-06-14 12:32:41,707 INFO L125 PetriNetUnfolderBase]: For 1983700/1983706 co-relation queries the response was YES. [2024-06-14 12:32:41,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71230 conditions, 5624 events. 3512/5624 cut-off events. For 1983700/1983706 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34313 event pairs, 631 based on Foata normal form. 8/5631 useless extension candidates. Maximal degree in co-relation 71012. Up to 4732 conditions per place. [2024-06-14 12:32:41,813 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 564 selfloop transitions, 165 changer transitions 0/734 dead transitions. [2024-06-14 12:32:41,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 734 transitions, 12274 flow [2024-06-14 12:32:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:32:41,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:32:41,814 INFO L175 Difference]: Start difference. First operand has 478 places, 712 transitions, 9992 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:32:41,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 734 transitions, 12274 flow [2024-06-14 12:32:51,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 734 transitions, 11580 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-14 12:32:51,138 INFO L231 Difference]: Finished difference. Result has 480 places, 716 transitions, 9774 flow [2024-06-14 12:32:51,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9298, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9774, PETRI_PLACES=480, PETRI_TRANSITIONS=716} [2024-06-14 12:32:51,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-14 12:32:51,138 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 716 transitions, 9774 flow [2024-06-14 12:32:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:51,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:51,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:51,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:32:51,139 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:51,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:51,139 INFO L85 PathProgramCache]: Analyzing trace with hash 517223076, now seen corresponding path program 23 times [2024-06-14 12:32:51,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:51,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195034283] [2024-06-14 12:32:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:51,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:52,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:52,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195034283] [2024-06-14 12:32:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195034283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:52,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:52,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:32:52,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718693442] [2024-06-14 12:32:52,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:52,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:32:52,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:32:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:32:52,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:52,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 716 transitions, 9774 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:52,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:52,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:52,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:54,087 INFO L124 PetriNetUnfolderBase]: 3506/5606 cut-off events. [2024-06-14 12:32:54,088 INFO L125 PetriNetUnfolderBase]: For 1978449/1978449 co-relation queries the response was YES. [2024-06-14 12:32:54,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70396 conditions, 5606 events. 3506/5606 cut-off events. For 1978449/1978449 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34037 event pairs, 711 based on Foata normal form. 2/5607 useless extension candidates. Maximal degree in co-relation 70177. Up to 5060 conditions per place. [2024-06-14 12:32:54,189 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 638 selfloop transitions, 87 changer transitions 0/730 dead transitions. [2024-06-14 12:32:54,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 730 transitions, 11580 flow [2024-06-14 12:32:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:32:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:32:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:32:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:32:54,190 INFO L175 Difference]: Start difference. First operand has 480 places, 716 transitions, 9774 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:32:54,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 730 transitions, 11580 flow [2024-06-14 12:33:03,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 730 transitions, 11146 flow, removed 134 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:03,187 INFO L231 Difference]: Finished difference. Result has 485 places, 716 transitions, 9520 flow [2024-06-14 12:33:03,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9520, PETRI_PLACES=485, PETRI_TRANSITIONS=716} [2024-06-14 12:33:03,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-14 12:33:03,188 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 716 transitions, 9520 flow [2024-06-14 12:33:03,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:03,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:03,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:03,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:33:03,188 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:03,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2033900332, now seen corresponding path program 24 times [2024-06-14 12:33:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:03,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873016269] [2024-06-14 12:33:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:03,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:04,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:04,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873016269] [2024-06-14 12:33:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873016269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:04,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329468469] [2024-06-14 12:33:04,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:04,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:04,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:04,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:04,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 716 transitions, 9520 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:04,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:04,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:04,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:06,118 INFO L124 PetriNetUnfolderBase]: 3521/5635 cut-off events. [2024-06-14 12:33:06,118 INFO L125 PetriNetUnfolderBase]: For 1998886/1998886 co-relation queries the response was YES. [2024-06-14 12:33:06,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70312 conditions, 5635 events. 3521/5635 cut-off events. For 1998886/1998886 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34325 event pairs, 712 based on Foata normal form. 2/5636 useless extension candidates. Maximal degree in co-relation 70092. Up to 5074 conditions per place. [2024-06-14 12:33:06,236 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 640 selfloop transitions, 94 changer transitions 0/739 dead transitions. [2024-06-14 12:33:06,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 739 transitions, 11566 flow [2024-06-14 12:33:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:33:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:33:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 12:33:06,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-14 12:33:06,237 INFO L175 Difference]: Start difference. First operand has 485 places, 716 transitions, 9520 flow. Second operand 11 states and 188 transitions. [2024-06-14 12:33:06,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 739 transitions, 11566 flow [2024-06-14 12:33:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 739 transitions, 11153 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 12:33:14,709 INFO L231 Difference]: Finished difference. Result has 486 places, 722 transitions, 9509 flow [2024-06-14 12:33:14,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9126, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9509, PETRI_PLACES=486, PETRI_TRANSITIONS=722} [2024-06-14 12:33:14,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-14 12:33:14,710 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 722 transitions, 9509 flow [2024-06-14 12:33:14,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:14,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:14,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:14,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:33:14,710 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:14,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash 800264687, now seen corresponding path program 11 times [2024-06-14 12:33:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:14,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58039207] [2024-06-14 12:33:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:14,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:15,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58039207] [2024-06-14 12:33:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58039207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:15,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:15,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469850102] [2024-06-14 12:33:15,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:15,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:15,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:15,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 722 transitions, 9509 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:15,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:15,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:17,554 INFO L124 PetriNetUnfolderBase]: 3547/5681 cut-off events. [2024-06-14 12:33:17,554 INFO L125 PetriNetUnfolderBase]: For 2050014/2050020 co-relation queries the response was YES. [2024-06-14 12:33:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70884 conditions, 5681 events. 3547/5681 cut-off events. For 2050014/2050020 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 34790 event pairs, 675 based on Foata normal form. 8/5688 useless extension candidates. Maximal degree in co-relation 70665. Up to 4770 conditions per place. [2024-06-14 12:33:17,658 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 568 selfloop transitions, 174 changer transitions 0/747 dead transitions. [2024-06-14 12:33:17,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 747 transitions, 11939 flow [2024-06-14 12:33:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:33:17,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:33:17,659 INFO L175 Difference]: Start difference. First operand has 486 places, 722 transitions, 9509 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:33:17,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 747 transitions, 11939 flow [2024-06-14 12:33:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 747 transitions, 11607 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:26,755 INFO L231 Difference]: Finished difference. Result has 487 places, 729 transitions, 9781 flow [2024-06-14 12:33:26,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9177, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9781, PETRI_PLACES=487, PETRI_TRANSITIONS=729} [2024-06-14 12:33:26,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-14 12:33:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 729 transitions, 9781 flow [2024-06-14 12:33:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:26,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:26,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:33:26,756 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:26,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash 800264284, now seen corresponding path program 25 times [2024-06-14 12:33:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153812747] [2024-06-14 12:33:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:27,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:27,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153812747] [2024-06-14 12:33:27,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153812747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:27,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:27,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706015924] [2024-06-14 12:33:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:27,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:27,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 729 transitions, 9781 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:27,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:27,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:27,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:29,548 INFO L124 PetriNetUnfolderBase]: 3557/5723 cut-off events. [2024-06-14 12:33:29,548 INFO L125 PetriNetUnfolderBase]: For 2075772/2075774 co-relation queries the response was YES. [2024-06-14 12:33:29,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71414 conditions, 5723 events. 3557/5723 cut-off events. For 2075772/2075774 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35324 event pairs, 694 based on Foata normal form. 4/5726 useless extension candidates. Maximal degree in co-relation 71194. Up to 4353 conditions per place. [2024-06-14 12:33:29,658 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 441 selfloop transitions, 303 changer transitions 0/749 dead transitions. [2024-06-14 12:33:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 749 transitions, 11816 flow [2024-06-14 12:33:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:33:29,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:33:29,659 INFO L175 Difference]: Start difference. First operand has 487 places, 729 transitions, 9781 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:33:29,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 749 transitions, 11816 flow [2024-06-14 12:33:37,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 749 transitions, 11449 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:37,119 INFO L231 Difference]: Finished difference. Result has 492 places, 732 transitions, 10187 flow [2024-06-14 12:33:37,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9414, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10187, PETRI_PLACES=492, PETRI_TRANSITIONS=732} [2024-06-14 12:33:37,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 448 predicate places. [2024-06-14 12:33:37,120 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 732 transitions, 10187 flow [2024-06-14 12:33:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:37,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:37,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:33:37,121 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:37,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash 800710157, now seen corresponding path program 12 times [2024-06-14 12:33:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:37,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049902889] [2024-06-14 12:33:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:37,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:38,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049902889] [2024-06-14 12:33:38,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049902889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:38,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:38,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:38,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604112695] [2024-06-14 12:33:38,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:38,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:38,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:38,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 732 transitions, 10187 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:38,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:38,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:38,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:39,845 INFO L124 PetriNetUnfolderBase]: 3551/5697 cut-off events. [2024-06-14 12:33:39,845 INFO L125 PetriNetUnfolderBase]: For 2074026/2074032 co-relation queries the response was YES. [2024-06-14 12:33:39,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71452 conditions, 5697 events. 3551/5697 cut-off events. For 2074026/2074032 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35046 event pairs, 630 based on Foata normal form. 8/5704 useless extension candidates. Maximal degree in co-relation 71231. Up to 4779 conditions per place. [2024-06-14 12:33:39,958 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 567 selfloop transitions, 177 changer transitions 0/749 dead transitions. [2024-06-14 12:33:39,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 749 transitions, 12063 flow [2024-06-14 12:33:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:33:39,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:33:39,959 INFO L175 Difference]: Start difference. First operand has 492 places, 732 transitions, 10187 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:33:39,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 749 transitions, 12063 flow [2024-06-14 12:33:48,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 749 transitions, 11326 flow, removed 119 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:48,410 INFO L231 Difference]: Finished difference. Result has 495 places, 732 transitions, 9810 flow [2024-06-14 12:33:48,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9810, PETRI_PLACES=495, PETRI_TRANSITIONS=732} [2024-06-14 12:33:48,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-14 12:33:48,411 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 732 transitions, 9810 flow [2024-06-14 12:33:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:48,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:48,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:33:48,411 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:48,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash -401113587, now seen corresponding path program 13 times [2024-06-14 12:33:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:48,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218546513] [2024-06-14 12:33:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:48,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:49,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218546513] [2024-06-14 12:33:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218546513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:49,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:49,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504306269] [2024-06-14 12:33:49,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:49,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:49,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:49,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:49,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:49,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:49,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 732 transitions, 9810 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:49,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:49,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:49,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:51,255 INFO L124 PetriNetUnfolderBase]: 3577/5723 cut-off events. [2024-06-14 12:33:51,255 INFO L125 PetriNetUnfolderBase]: For 2122243/2122249 co-relation queries the response was YES. [2024-06-14 12:33:51,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71751 conditions, 5723 events. 3577/5723 cut-off events. For 2122243/2122249 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35135 event pairs, 666 based on Foata normal form. 8/5730 useless extension candidates. Maximal degree in co-relation 71529. Up to 4804 conditions per place. [2024-06-14 12:33:51,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 571 selfloop transitions, 181 changer transitions 0/757 dead transitions. [2024-06-14 12:33:51,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 757 transitions, 12306 flow [2024-06-14 12:33:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:33:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:33:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:33:51,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:33:51,368 INFO L175 Difference]: Start difference. First operand has 495 places, 732 transitions, 9810 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:33:51,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 757 transitions, 12306 flow [2024-06-14 12:34:00,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 757 transitions, 11948 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:00,759 INFO L231 Difference]: Finished difference. Result has 497 places, 739 transitions, 10104 flow [2024-06-14 12:34:00,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9466, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10104, PETRI_PLACES=497, PETRI_TRANSITIONS=739} [2024-06-14 12:34:00,759 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-14 12:34:00,759 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 739 transitions, 10104 flow [2024-06-14 12:34:00,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:00,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:00,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:00,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:34:00,760 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:00,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1525763904, now seen corresponding path program 26 times [2024-06-14 12:34:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:00,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887420057] [2024-06-14 12:34:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887420057] [2024-06-14 12:34:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887420057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:01,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038551560] [2024-06-14 12:34:01,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:01,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:01,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 739 transitions, 10104 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:01,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:01,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:01,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:03,623 INFO L124 PetriNetUnfolderBase]: 3587/5733 cut-off events. [2024-06-14 12:34:03,623 INFO L125 PetriNetUnfolderBase]: For 2148328/2148328 co-relation queries the response was YES. [2024-06-14 12:34:03,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72188 conditions, 5733 events. 3587/5733 cut-off events. For 2148328/2148328 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 34989 event pairs, 727 based on Foata normal form. 2/5734 useless extension candidates. Maximal degree in co-relation 71965. Up to 5191 conditions per place. [2024-06-14 12:34:03,735 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 665 selfloop transitions, 84 changer transitions 0/754 dead transitions. [2024-06-14 12:34:03,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 754 transitions, 11806 flow [2024-06-14 12:34:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:34:03,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:34:03,736 INFO L175 Difference]: Start difference. First operand has 497 places, 739 transitions, 10104 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:34:03,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 754 transitions, 11806 flow [2024-06-14 12:34:13,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 754 transitions, 11403 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:13,624 INFO L231 Difference]: Finished difference. Result has 501 places, 742 transitions, 10045 flow [2024-06-14 12:34:13,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9701, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10045, PETRI_PLACES=501, PETRI_TRANSITIONS=742} [2024-06-14 12:34:13,625 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-14 12:34:13,625 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 742 transitions, 10045 flow [2024-06-14 12:34:13,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:13,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:13,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:34:13,625 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:13,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash -401380497, now seen corresponding path program 14 times [2024-06-14 12:34:13,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:13,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326099248] [2024-06-14 12:34:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:13,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:14,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326099248] [2024-06-14 12:34:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326099248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:14,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717739436] [2024-06-14 12:34:14,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:14,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:14,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:14,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:14,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:14,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 742 transitions, 10045 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:14,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:14,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:14,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:16,465 INFO L124 PetriNetUnfolderBase]: 3581/5731 cut-off events. [2024-06-14 12:34:16,465 INFO L125 PetriNetUnfolderBase]: For 2144752/2144758 co-relation queries the response was YES. [2024-06-14 12:34:16,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71506 conditions, 5731 events. 3581/5731 cut-off events. For 2144752/2144758 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35168 event pairs, 670 based on Foata normal form. 8/5738 useless extension candidates. Maximal degree in co-relation 71282. Up to 4813 conditions per place. [2024-06-14 12:34:16,577 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 576 selfloop transitions, 178 changer transitions 0/759 dead transitions. [2024-06-14 12:34:16,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 759 transitions, 11947 flow [2024-06-14 12:34:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:34:16,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 12:34:16,577 INFO L175 Difference]: Start difference. First operand has 501 places, 742 transitions, 10045 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:34:16,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 759 transitions, 11947 flow [2024-06-14 12:34:26,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 759 transitions, 11539 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:26,421 INFO L231 Difference]: Finished difference. Result has 504 places, 742 transitions, 9999 flow [2024-06-14 12:34:26,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9999, PETRI_PLACES=504, PETRI_TRANSITIONS=742} [2024-06-14 12:34:26,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-14 12:34:26,422 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 742 transitions, 9999 flow [2024-06-14 12:34:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:26,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:26,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:34:26,422 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:26,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash -731168398, now seen corresponding path program 27 times [2024-06-14 12:34:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547672175] [2024-06-14 12:34:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:27,532 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 12:34:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:27,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547672175] [2024-06-14 12:34:27,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547672175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:27,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:27,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:27,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245016996] [2024-06-14 12:34:27,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:27,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:27,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 742 transitions, 9999 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:27,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:27,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:27,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:29,244 INFO L124 PetriNetUnfolderBase]: 3575/5717 cut-off events. [2024-06-14 12:34:29,244 INFO L125 PetriNetUnfolderBase]: For 2138497/2138497 co-relation queries the response was YES. [2024-06-14 12:34:29,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71197 conditions, 5717 events. 3575/5717 cut-off events. For 2138497/2138497 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34901 event pairs, 722 based on Foata normal form. 2/5718 useless extension candidates. Maximal degree in co-relation 70972. Up to 5175 conditions per place. [2024-06-14 12:34:29,356 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 655 selfloop transitions, 94 changer transitions 0/754 dead transitions. [2024-06-14 12:34:29,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 754 transitions, 11537 flow [2024-06-14 12:34:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:29,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:34:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:34:29,357 INFO L175 Difference]: Start difference. First operand has 504 places, 742 transitions, 9999 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:34:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 754 transitions, 11537 flow [2024-06-14 12:34:38,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 754 transitions, 11122 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:38,868 INFO L231 Difference]: Finished difference. Result has 508 places, 742 transitions, 9778 flow [2024-06-14 12:34:38,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9778, PETRI_PLACES=508, PETRI_TRANSITIONS=742} [2024-06-14 12:34:38,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-14 12:34:38,869 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 742 transitions, 9778 flow [2024-06-14 12:34:38,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:38,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:38,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:38,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:34:38,869 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:38,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash -901866178, now seen corresponding path program 28 times [2024-06-14 12:34:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:38,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686983113] [2024-06-14 12:34:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:38,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:39,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:39,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686983113] [2024-06-14 12:34:39,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686983113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:39,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:39,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:39,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983532977] [2024-06-14 12:34:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:39,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:39,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:40,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:40,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 742 transitions, 9778 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:40,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:40,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:40,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:41,735 INFO L124 PetriNetUnfolderBase]: 3585/5795 cut-off events. [2024-06-14 12:34:41,735 INFO L125 PetriNetUnfolderBase]: For 2164272/2164274 co-relation queries the response was YES. [2024-06-14 12:34:41,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71209 conditions, 5795 events. 3585/5795 cut-off events. For 2164272/2164274 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 36259 event pairs, 670 based on Foata normal form. 4/5798 useless extension candidates. Maximal degree in co-relation 70983. Up to 4388 conditions per place. [2024-06-14 12:34:41,841 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 431 selfloop transitions, 327 changer transitions 0/763 dead transitions. [2024-06-14 12:34:41,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 763 transitions, 12182 flow [2024-06-14 12:34:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:34:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:34:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:34:41,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:34:41,842 INFO L175 Difference]: Start difference. First operand has 508 places, 742 transitions, 9778 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:34:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 763 transitions, 12182 flow [2024-06-14 12:34:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 763 transitions, 11884 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 12:34:52,138 INFO L231 Difference]: Finished difference. Result has 508 places, 745 transitions, 10304 flow [2024-06-14 12:34:52,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9480, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10304, PETRI_PLACES=508, PETRI_TRANSITIONS=745} [2024-06-14 12:34:52,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-14 12:34:52,139 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 745 transitions, 10304 flow [2024-06-14 12:34:52,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:52,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:52,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:52,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:34:52,139 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:52,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1532918394, now seen corresponding path program 29 times [2024-06-14 12:34:52,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:52,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753841643] [2024-06-14 12:34:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:52,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:53,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:53,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753841643] [2024-06-14 12:34:53,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753841643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:53,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:53,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:34:53,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820633362] [2024-06-14 12:34:53,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:53,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:34:53,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:34:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:34:53,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:53,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 745 transitions, 10304 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:53,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:53,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:53,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:54,887 INFO L124 PetriNetUnfolderBase]: 3579/5751 cut-off events. [2024-06-14 12:34:54,887 INFO L125 PetriNetUnfolderBase]: For 2162613/2162615 co-relation queries the response was YES. [2024-06-14 12:34:54,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71541 conditions, 5751 events. 3579/5751 cut-off events. For 2162613/2162615 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 35452 event pairs, 648 based on Foata normal form. 4/5754 useless extension candidates. Maximal degree in co-relation 71314. Up to 4383 conditions per place. [2024-06-14 12:34:55,000 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 469 selfloop transitions, 288 changer transitions 0/762 dead transitions. [2024-06-14 12:34:55,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 762 transitions, 12218 flow [2024-06-14 12:34:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:34:55,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:34:55,001 INFO L175 Difference]: Start difference. First operand has 508 places, 745 transitions, 10304 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:34:55,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 762 transitions, 12218 flow [2024-06-14 12:35:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 762 transitions, 11465 flow, removed 148 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:06,418 INFO L231 Difference]: Finished difference. Result has 511 places, 745 transitions, 10133 flow [2024-06-14 12:35:06,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10133, PETRI_PLACES=511, PETRI_TRANSITIONS=745} [2024-06-14 12:35:06,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 467 predicate places. [2024-06-14 12:35:06,419 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 745 transitions, 10133 flow [2024-06-14 12:35:06,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:06,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:06,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:35:06,419 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:06,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1206987057, now seen corresponding path program 15 times [2024-06-14 12:35:06,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643477449] [2024-06-14 12:35:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:06,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643477449] [2024-06-14 12:35:07,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643477449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:07,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:07,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:07,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308713759] [2024-06-14 12:35:07,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:07,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:07,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:07,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 745 transitions, 10133 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:07,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:07,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:07,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:09,326 INFO L124 PetriNetUnfolderBase]: 3621/5811 cut-off events. [2024-06-14 12:35:09,326 INFO L125 PetriNetUnfolderBase]: For 2241234/2241240 co-relation queries the response was YES. [2024-06-14 12:35:09,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72701 conditions, 5811 events. 3621/5811 cut-off events. For 2241234/2241240 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35905 event pairs, 662 based on Foata normal form. 8/5818 useless extension candidates. Maximal degree in co-relation 72473. Up to 4851 conditions per place. [2024-06-14 12:35:09,437 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 565 selfloop transitions, 203 changer transitions 0/773 dead transitions. [2024-06-14 12:35:09,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 773 transitions, 12813 flow [2024-06-14 12:35:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:35:09,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:35:09,438 INFO L175 Difference]: Start difference. First operand has 511 places, 745 transitions, 10133 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:35:09,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 773 transitions, 12813 flow [2024-06-14 12:35:19,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 773 transitions, 12022 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 12:35:19,629 INFO L231 Difference]: Finished difference. Result has 510 places, 755 transitions, 10166 flow [2024-06-14 12:35:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9342, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10166, PETRI_PLACES=510, PETRI_TRANSITIONS=755} [2024-06-14 12:35:19,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 466 predicate places. [2024-06-14 12:35:19,630 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 755 transitions, 10166 flow [2024-06-14 12:35:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:19,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:19,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:35:19,631 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:19,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -473502195, now seen corresponding path program 16 times [2024-06-14 12:35:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882772648] [2024-06-14 12:35:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:20,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882772648] [2024-06-14 12:35:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882772648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:20,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:20,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:20,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989310982] [2024-06-14 12:35:20,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:20,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:20,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:20,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:20,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 755 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:20,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:20,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:20,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:22,439 INFO L124 PetriNetUnfolderBase]: 3615/5805 cut-off events. [2024-06-14 12:35:22,440 INFO L125 PetriNetUnfolderBase]: For 2236732/2236738 co-relation queries the response was YES. [2024-06-14 12:35:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 5805 events. 3615/5805 cut-off events. For 2236732/2236738 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35941 event pairs, 650 based on Foata normal form. 8/5812 useless extension candidates. Maximal degree in co-relation 71783. Up to 4846 conditions per place. [2024-06-14 12:35:22,555 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 553 selfloop transitions, 215 changer transitions 0/773 dead transitions. [2024-06-14 12:35:22,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 773 transitions, 12438 flow [2024-06-14 12:35:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:35:22,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:35:22,556 INFO L175 Difference]: Start difference. First operand has 510 places, 755 transitions, 10166 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:35:22,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 773 transitions, 12438 flow [2024-06-14 12:35:32,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 773 transitions, 11914 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:32,498 INFO L231 Difference]: Finished difference. Result has 513 places, 755 transitions, 10078 flow [2024-06-14 12:35:32,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9642, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10078, PETRI_PLACES=513, PETRI_TRANSITIONS=755} [2024-06-14 12:35:32,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 469 predicate places. [2024-06-14 12:35:32,499 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 755 transitions, 10078 flow [2024-06-14 12:35:32,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:32,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:32,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:32,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:35:32,500 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:32,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1771657459, now seen corresponding path program 17 times [2024-06-14 12:35:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650200793] [2024-06-14 12:35:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:33,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:33,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650200793] [2024-06-14 12:35:33,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650200793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:33,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:33,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:33,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699076074] [2024-06-14 12:35:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:33,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:33,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:33,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:33,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:33,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 755 transitions, 10078 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:33,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:33,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:33,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:35,411 INFO L124 PetriNetUnfolderBase]: 3609/5791 cut-off events. [2024-06-14 12:35:35,411 INFO L125 PetriNetUnfolderBase]: For 2229322/2229328 co-relation queries the response was YES. [2024-06-14 12:35:35,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71612 conditions, 5791 events. 3609/5791 cut-off events. For 2229322/2229328 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 35725 event pairs, 659 based on Foata normal form. 8/5798 useless extension candidates. Maximal degree in co-relation 71382. Up to 4841 conditions per place. [2024-06-14 12:35:35,521 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 564 selfloop transitions, 203 changer transitions 0/772 dead transitions. [2024-06-14 12:35:35,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 772 transitions, 12018 flow [2024-06-14 12:35:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:35:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:35:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 12:35:35,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 12:35:35,522 INFO L175 Difference]: Start difference. First operand has 513 places, 755 transitions, 10078 flow. Second operand 10 states and 176 transitions. [2024-06-14 12:35:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 772 transitions, 12018 flow [2024-06-14 12:35:46,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 772 transitions, 11455 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:46,706 INFO L231 Difference]: Finished difference. Result has 517 places, 755 transitions, 9927 flow [2024-06-14 12:35:46,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9515, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9927, PETRI_PLACES=517, PETRI_TRANSITIONS=755} [2024-06-14 12:35:46,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 473 predicate places. [2024-06-14 12:35:46,707 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 755 transitions, 9927 flow [2024-06-14 12:35:46,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:46,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:46,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:46,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:35:46,708 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:46,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -467788275, now seen corresponding path program 18 times [2024-06-14 12:35:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276686327] [2024-06-14 12:35:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:47,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:47,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276686327] [2024-06-14 12:35:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276686327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:47,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:47,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844321418] [2024-06-14 12:35:47,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:47,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:47,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:47,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:47,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:35:47,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 755 transitions, 9927 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:47,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:47,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:35:47,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:49,532 INFO L124 PetriNetUnfolderBase]: 3619/5805 cut-off events. [2024-06-14 12:35:49,532 INFO L125 PetriNetUnfolderBase]: For 2251862/2251868 co-relation queries the response was YES. [2024-06-14 12:35:49,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71681 conditions, 5805 events. 3619/5805 cut-off events. For 2251862/2251868 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 35861 event pairs, 647 based on Foata normal form. 8/5812 useless extension candidates. Maximal degree in co-relation 71450. Up to 4851 conditions per place. [2024-06-14 12:35:49,647 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 552 selfloop transitions, 219 changer transitions 0/776 dead transitions. [2024-06-14 12:35:49,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 776 transitions, 12009 flow [2024-06-14 12:35:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:35:49,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:35:49,648 INFO L175 Difference]: Start difference. First operand has 517 places, 755 transitions, 9927 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:35:49,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 776 transitions, 12009 flow [2024-06-14 12:36:01,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 776 transitions, 11615 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:36:01,342 INFO L231 Difference]: Finished difference. Result has 518 places, 759 transitions, 10109 flow [2024-06-14 12:36:01,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9538, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10109, PETRI_PLACES=518, PETRI_TRANSITIONS=759} [2024-06-14 12:36:01,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 474 predicate places. [2024-06-14 12:36:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 759 transitions, 10109 flow [2024-06-14 12:36:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:01,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:01,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:36:01,343 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:01,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -724288785, now seen corresponding path program 19 times [2024-06-14 12:36:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:01,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044902111] [2024-06-14 12:36:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:02,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:02,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044902111] [2024-06-14 12:36:02,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044902111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:02,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:02,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483562129] [2024-06-14 12:36:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:02,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:02,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:02,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 759 transitions, 10109 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:02,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:02,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:02,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:04,160 INFO L124 PetriNetUnfolderBase]: 3613/5797 cut-off events. [2024-06-14 12:36:04,161 INFO L125 PetriNetUnfolderBase]: For 2247637/2247643 co-relation queries the response was YES. [2024-06-14 12:36:04,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71486 conditions, 5797 events. 3613/5797 cut-off events. For 2247637/2247643 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 35820 event pairs, 663 based on Foata normal form. 8/5804 useless extension candidates. Maximal degree in co-relation 71254. Up to 4846 conditions per place. [2024-06-14 12:36:04,271 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 564 selfloop transitions, 207 changer transitions 0/776 dead transitions. [2024-06-14 12:36:04,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 776 transitions, 12061 flow [2024-06-14 12:36:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:36:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:36:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:36:04,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:36:04,272 INFO L175 Difference]: Start difference. First operand has 518 places, 759 transitions, 10109 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:36:04,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 776 transitions, 12061 flow [2024-06-14 12:36:15,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 776 transitions, 11541 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:15,989 INFO L231 Difference]: Finished difference. Result has 522 places, 759 transitions, 10009 flow [2024-06-14 12:36:15,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9589, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10009, PETRI_PLACES=522, PETRI_TRANSITIONS=759} [2024-06-14 12:36:15,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 478 predicate places. [2024-06-14 12:36:15,990 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 759 transitions, 10009 flow [2024-06-14 12:36:15,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:15,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:15,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:15,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:36:15,991 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:15,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash -724734658, now seen corresponding path program 30 times [2024-06-14 12:36:15,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:15,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517317585] [2024-06-14 12:36:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:17,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:17,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517317585] [2024-06-14 12:36:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517317585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:17,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:17,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:36:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323827350] [2024-06-14 12:36:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:36:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:36:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:36:17,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:36:17,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 759 transitions, 10009 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:17,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:36:17,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:19,044 INFO L124 PetriNetUnfolderBase]: 3607/5829 cut-off events. [2024-06-14 12:36:19,045 INFO L125 PetriNetUnfolderBase]: For 2244419/2244421 co-relation queries the response was YES. [2024-06-14 12:36:19,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71010 conditions, 5829 events. 3607/5829 cut-off events. For 2244419/2244421 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36465 event pairs, 677 based on Foata normal form. 4/5832 useless extension candidates. Maximal degree in co-relation 70777. Up to 4426 conditions per place. [2024-06-14 12:36:19,147 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 438 selfloop transitions, 332 changer transitions 0/775 dead transitions. [2024-06-14 12:36:19,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 775 transitions, 11621 flow [2024-06-14 12:36:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:36:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:36:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:36:19,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:36:19,148 INFO L175 Difference]: Start difference. First operand has 522 places, 759 transitions, 10009 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:36:19,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 775 transitions, 11621 flow Killed by 15