./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix025_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix025_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix025_pso.opt_rmo.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-eb4cb34-m [2024-06-21 20:52:27,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:52:27,824 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:52:27,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:52:27,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:52:27,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:52:27,859 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:52:27,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:52:27,860 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:52:27,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:52:27,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:52:27,864 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:52:27,865 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:52:27,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:52:27,867 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:52:27,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:52:27,867 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:52:27,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:52:27,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:52:27,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:52:27,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:52:27,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:52:27,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:52:27,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:52:27,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:52:27,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:52:27,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:52:27,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:52:27,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:52:27,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:52:27,873 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:52:27,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:52:27,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:52:27,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:52:27,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:52:27,874 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:52:27,874 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:52:27,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:52:27,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:52:27,875 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:52:27,875 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:52:27,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:52:27,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:52:27,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:52:28,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:52:28,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:52:28,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:52:28,188 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:52:28,188 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:52:28,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-21 20:52:29,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:52:29,551 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:52:29,551 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-21 20:52:29,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef241c78/5f94075189fa402885fd73ee9793c168/FLAGafdc6980d [2024-06-21 20:52:29,580 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef241c78/5f94075189fa402885fd73ee9793c168 [2024-06-21 20:52:29,583 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:52:29,584 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:52:29,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix025_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 20:52:29,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:52:29,779 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:52:29,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:52:29,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:52:29,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:52:29,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:52:29" (1/2) ... [2024-06-21 20:52:29,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f82915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:29, skipping insertion in model container [2024-06-21 20:52:29,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:52:29" (1/2) ... [2024-06-21 20:52:29,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@448db973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:52:29, skipping insertion in model container [2024-06-21 20:52:29,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:29" (2/2) ... [2024-06-21 20:52:29,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f82915 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:29, skipping insertion in model container [2024-06-21 20:52:29,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:29" (2/2) ... [2024-06-21 20:52:29,790 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:52:29,893 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:52:29,894 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 20:52:29,894 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 20:52:29,894 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 20:52:29,895 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:52:29,895 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-21 20:52:29,941 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:52:30,288 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:52:30,298 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:52:30,459 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:52:30,510 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:52:30,510 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30 WrapperNode [2024-06-21 20:52:30,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:52:30,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:52:30,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:52:30,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:52:30,519 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 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,552 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 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,585 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 20:52:30,585 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:52:30,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:52:30,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:52:30,586 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:52:30,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,599 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,614 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]. [2024-06-21 20:52:30,615 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,644 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,653 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:52:30,654 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:52:30,654 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:52:30,654 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:52:30,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (1/1) ... [2024-06-21 20:52:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:52:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:52:30,738 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) [2024-06-21 20:52:30,800 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 [2024-06-21 20:52:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:52:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:52:30,817 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:52:30,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:52:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:52:30,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:52:30,818 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:52:30,819 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:52:30,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:52:30,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:52:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:52:30,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:52:30,821 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:52:30,986 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:52:30,990 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:52:31,386 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:52:31,386 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:52:31,552 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:52:31,553 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:52:31,554 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:52:31 BoogieIcfgContainer [2024-06-21 20:52:31,554 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:52:31,556 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:52:31,556 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:52:31,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:52:31,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:52:29" (1/4) ... [2024-06-21 20:52:31,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ca5693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:52:31, skipping insertion in model container [2024-06-21 20:52:31,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:52:29" (2/4) ... [2024-06-21 20:52:31,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ca5693 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:52:31, skipping insertion in model container [2024-06-21 20:52:31,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:52:30" (3/4) ... [2024-06-21 20:52:31,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ca5693 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:52:31, skipping insertion in model container [2024-06-21 20:52:31,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:52:31" (4/4) ... [2024-06-21 20:52:31,564 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_pso.opt_rmo.opt.i [2024-06-21 20:52:31,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:52:31,579 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:52:31,579 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:52:31,625 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:52:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:52:31,682 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 20:52:31,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:52:31,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:52:31,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 20:52:31,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 20:52:31,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:52:31,733 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;@3e8aa071, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:52:31,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:52:31,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:52:31,740 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:52:31,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:52:31,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:31,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:52:31,741 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)] === [2024-06-21 20:52:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash 362366708, now seen corresponding path program 1 times [2024-06-21 20:52:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:31,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395857090] [2024-06-21 20:52:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:31,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395857090] [2024-06-21 20:52:32,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395857090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:32,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:32,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:52:32,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888235227] [2024-06-21 20:52:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:52:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:52:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:52:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-21 20:52:32,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-21 20:52:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:33,362 INFO L124 PetriNetUnfolderBase]: 1152/1852 cut-off events. [2024-06-21 20:52:33,362 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 20:52:33,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3669 conditions, 1852 events. 1152/1852 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9237 event pairs, 785 based on Foata normal form. 1/1778 useless extension candidates. Maximal degree in co-relation 3657. Up to 1732 conditions per place. [2024-06-21 20:52:33,378 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 20:52:33,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-21 20:52:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:52:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:52:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-21 20:52:33,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-21 20:52:33,392 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-21 20:52:33,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-21 20:52:33,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:33,399 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 20:52:33,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 20:52:33,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 20:52:33,404 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 20:52:33,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:33,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:33,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:33,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:52:33,405 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)] === [2024-06-21 20:52:33,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash 342093779, now seen corresponding path program 1 times [2024-06-21 20:52:33,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:33,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928332999] [2024-06-21 20:52:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:33,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928332999] [2024-06-21 20:52:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928332999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:34,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:52:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054961194] [2024-06-21 20:52:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:52:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:52:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:52:34,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:52:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:52:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:34,561 INFO L124 PetriNetUnfolderBase]: 1347/2081 cut-off events. [2024-06-21 20:52:34,561 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-21 20:52:34,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 2081 events. 1347/2081 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10036 event pairs, 649 based on Foata normal form. 6/2076 useless extension candidates. Maximal degree in co-relation 4710. Up to 1981 conditions per place. [2024-06-21 20:52:34,577 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 20:52:34,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2024-06-21 20:52:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:52:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:52:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 20:52:34,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-21 20:52:34,579 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-21 20:52:34,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2024-06-21 20:52:34,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:52:34,582 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 20:52:34,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:52:34,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 20:52:34,583 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 20:52:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:34,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:34,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:34,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:52:34,584 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)] === [2024-06-21 20:52:34,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash -640371016, now seen corresponding path program 1 times [2024-06-21 20:52:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733826011] [2024-06-21 20:52:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:35,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733826011] [2024-06-21 20:52:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733826011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:35,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:52:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002944784] [2024-06-21 20:52:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:35,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:52:35,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:52:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:52:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 20:52:35,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:35,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:35,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 20:52:35,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:36,246 INFO L124 PetriNetUnfolderBase]: 1338/2066 cut-off events. [2024-06-21 20:52:36,247 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-21 20:52:36,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5215 conditions, 2066 events. 1338/2066 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9949 event pairs, 485 based on Foata normal form. 6/2061 useless extension candidates. Maximal degree in co-relation 5201. Up to 1936 conditions per place. [2024-06-21 20:52:36,261 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 50 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 20:52:36,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 348 flow [2024-06-21 20:52:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-21 20:52:36,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-21 20:52:36,268 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 137 transitions. [2024-06-21 20:52:36,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 348 flow [2024-06-21 20:52:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 328 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:52:36,272 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-21 20:52:36,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-21 20:52:36,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-21 20:52:36,273 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-21 20:52:36,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:36,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:36,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:36,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:52:36,274 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)] === [2024-06-21 20:52:36,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:36,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1396552970, now seen corresponding path program 1 times [2024-06-21 20:52:36,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:36,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639868943] [2024-06-21 20:52:36,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:37,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:37,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639868943] [2024-06-21 20:52:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639868943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:37,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:37,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:52:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098551662] [2024-06-21 20:52:37,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:52:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:52:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:52:37,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 20:52:37,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:37,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:37,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 20:52:37,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:37,469 INFO L124 PetriNetUnfolderBase]: 1126/1832 cut-off events. [2024-06-21 20:52:37,469 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-21 20:52:37,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5000 conditions, 1832 events. 1126/1832 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9199 event pairs, 487 based on Foata normal form. 2/1803 useless extension candidates. Maximal degree in co-relation 4983. Up to 1683 conditions per place. [2024-06-21 20:52:37,481 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-21 20:52:37,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 321 flow [2024-06-21 20:52:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:52:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:52:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 20:52:37,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-21 20:52:37,483 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 99 transitions. [2024-06-21 20:52:37,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 321 flow [2024-06-21 20:52:37,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 294 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:37,487 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-21 20:52:37,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 20:52:37,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 20:52:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-21 20:52:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:37,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:37,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:52:37,489 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)] === [2024-06-21 20:52:37,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -317550184, now seen corresponding path program 1 times [2024-06-21 20:52:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580041355] [2024-06-21 20:52:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580041355] [2024-06-21 20:52:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580041355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:38,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:38,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084266189] [2024-06-21 20:52:38,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:38,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:38,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:38,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:38,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:38,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:38,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:38,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:38,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:38,738 INFO L124 PetriNetUnfolderBase]: 1335/2073 cut-off events. [2024-06-21 20:52:38,738 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-21 20:52:38,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6181 conditions, 2073 events. 1335/2073 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10000 event pairs, 569 based on Foata normal form. 3/2075 useless extension candidates. Maximal degree in co-relation 6162. Up to 1955 conditions per place. [2024-06-21 20:52:38,755 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-21 20:52:38,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 440 flow [2024-06-21 20:52:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 20:52:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 20:52:38,757 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 118 transitions. [2024-06-21 20:52:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 440 flow [2024-06-21 20:52:38,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 420 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:38,761 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 297 flow [2024-06-21 20:52:38,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-21 20:52:38,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 20:52:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 297 flow [2024-06-21 20:52:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:52:38,763 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)] === [2024-06-21 20:52:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash -203461313, now seen corresponding path program 1 times [2024-06-21 20:52:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127294134] [2024-06-21 20:52:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:39,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:39,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127294134] [2024-06-21 20:52:39,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127294134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:39,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:39,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:39,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780649740] [2024-06-21 20:52:39,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:39,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:39,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:39,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:39,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:39,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:39,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:39,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:39,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:40,040 INFO L124 PetriNetUnfolderBase]: 1409/2191 cut-off events. [2024-06-21 20:52:40,040 INFO L125 PetriNetUnfolderBase]: For 5223/5233 co-relation queries the response was YES. [2024-06-21 20:52:40,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7379 conditions, 2191 events. 1409/2191 cut-off events. For 5223/5233 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10578 event pairs, 568 based on Foata normal form. 4/2183 useless extension candidates. Maximal degree in co-relation 7357. Up to 2047 conditions per place. [2024-06-21 20:52:40,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-21 20:52:40,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 509 flow [2024-06-21 20:52:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 20:52:40,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:52:40,060 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-21 20:52:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 509 flow [2024-06-21 20:52:40,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 495 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 20:52:40,067 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 341 flow [2024-06-21 20:52:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 20:52:40,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 20:52:40,070 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 341 flow [2024-06-21 20:52:40,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:40,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:40,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:40,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:52:40,071 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)] === [2024-06-21 20:52:40,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1254128261, now seen corresponding path program 2 times [2024-06-21 20:52:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:40,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205836014] [2024-06-21 20:52:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:40,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:40,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:40,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205836014] [2024-06-21 20:52:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205836014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:40,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:40,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616597363] [2024-06-21 20:52:40,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:40,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:40,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:40,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:40,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:40,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:41,316 INFO L124 PetriNetUnfolderBase]: 1415/2207 cut-off events. [2024-06-21 20:52:41,316 INFO L125 PetriNetUnfolderBase]: For 7055/7071 co-relation queries the response was YES. [2024-06-21 20:52:41,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 2207 events. 1415/2207 cut-off events. For 7055/7071 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10724 event pairs, 575 based on Foata normal form. 8/2203 useless extension candidates. Maximal degree in co-relation 7935. Up to 2029 conditions per place. [2024-06-21 20:52:41,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 20:52:41,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 557 flow [2024-06-21 20:52:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:52:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:52:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 20:52:41,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 20:52:41,350 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 341 flow. Second operand 6 states and 116 transitions. [2024-06-21 20:52:41,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 557 flow [2024-06-21 20:52:41,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 523 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:41,358 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-21 20:52:41,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 20:52:41,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 20:52:41,361 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-21 20:52:41,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:41,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:41,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:41,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:52:41,361 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)] === [2024-06-21 20:52:41,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:41,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1254120325, now seen corresponding path program 1 times [2024-06-21 20:52:41,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:41,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558468413] [2024-06-21 20:52:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:42,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558468413] [2024-06-21 20:52:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558468413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:42,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:42,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774048434] [2024-06-21 20:52:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:42,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:42,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:42,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:42,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-21 20:52:42,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:42,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:42,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:43,005 INFO L124 PetriNetUnfolderBase]: 1365/2148 cut-off events. [2024-06-21 20:52:43,006 INFO L125 PetriNetUnfolderBase]: For 8574/8574 co-relation queries the response was YES. [2024-06-21 20:52:43,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 2148 events. 1365/2148 cut-off events. For 8574/8574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10486 event pairs, 533 based on Foata normal form. 3/2150 useless extension candidates. Maximal degree in co-relation 8176. Up to 1986 conditions per place. [2024-06-21 20:52:43,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-21 20:52:43,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 655 flow [2024-06-21 20:52:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:52:43,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 20:52:43,025 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:52:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 655 flow [2024-06-21 20:52:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 605 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:43,035 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 420 flow [2024-06-21 20:52:43,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 20:52:43,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 20:52:43,037 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 420 flow [2024-06-21 20:52:43,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-21 20:52:43,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:43,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:43,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:52:43,038 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)] === [2024-06-21 20:52:43,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash 461921059, now seen corresponding path program 1 times [2024-06-21 20:52:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:43,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886905836] [2024-06-21 20:52:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:43,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:44,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:44,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886905836] [2024-06-21 20:52:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886905836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:44,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:44,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:44,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646763736] [2024-06-21 20:52:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:44,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:44,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-21 20:52:44,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:44,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:44,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:44,752 INFO L124 PetriNetUnfolderBase]: 1445/2233 cut-off events. [2024-06-21 20:52:44,753 INFO L125 PetriNetUnfolderBase]: For 11854/11873 co-relation queries the response was YES. [2024-06-21 20:52:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9186 conditions, 2233 events. 1445/2233 cut-off events. For 11854/11873 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10717 event pairs, 571 based on Foata normal form. 3/2229 useless extension candidates. Maximal degree in co-relation 9159. Up to 2071 conditions per place. [2024-06-21 20:52:44,769 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-21 20:52:44,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 690 flow [2024-06-21 20:52:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:52:44,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:52:44,771 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 420 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:52:44,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 690 flow [2024-06-21 20:52:44,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 631 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:52:44,780 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 439 flow [2024-06-21 20:52:44,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 20:52:44,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-21 20:52:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 439 flow [2024-06-21 20:52:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-21 20:52:44,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:44,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:44,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:52:44,783 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)] === [2024-06-21 20:52:44,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:44,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2012332651, now seen corresponding path program 1 times [2024-06-21 20:52:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284159165] [2024-06-21 20:52:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284159165] [2024-06-21 20:52:45,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284159165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:45,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:45,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943169277] [2024-06-21 20:52:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:45,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:45,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:45,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:46,231 INFO L124 PetriNetUnfolderBase]: 1635/2454 cut-off events. [2024-06-21 20:52:46,231 INFO L125 PetriNetUnfolderBase]: For 15031/15031 co-relation queries the response was YES. [2024-06-21 20:52:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10603 conditions, 2454 events. 1635/2454 cut-off events. For 15031/15031 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11455 event pairs, 592 based on Foata normal form. 6/2459 useless extension candidates. Maximal degree in co-relation 10575. Up to 2319 conditions per place. [2024-06-21 20:52:46,249 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-21 20:52:46,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 861 flow [2024-06-21 20:52:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:52:46,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 20:52:46,252 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 439 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:52:46,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 861 flow [2024-06-21 20:52:46,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 807 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:52:46,262 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 561 flow [2024-06-21 20:52:46,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-21 20:52:46,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 20:52:46,265 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 561 flow [2024-06-21 20:52:46,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:46,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:46,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:46,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:52:46,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:46,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash -223032521, now seen corresponding path program 2 times [2024-06-21 20:52:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:46,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706294474] [2024-06-21 20:52:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:46,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706294474] [2024-06-21 20:52:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706294474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:47,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:47,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:47,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635104382] [2024-06-21 20:52:47,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:47,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:47,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:47,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:47,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:47,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:47,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:47,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:47,709 INFO L124 PetriNetUnfolderBase]: 1719/2583 cut-off events. [2024-06-21 20:52:47,710 INFO L125 PetriNetUnfolderBase]: For 20636/20638 co-relation queries the response was YES. [2024-06-21 20:52:47,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12344 conditions, 2583 events. 1719/2583 cut-off events. For 20636/20638 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12165 event pairs, 591 based on Foata normal form. 8/2590 useless extension candidates. Maximal degree in co-relation 12313. Up to 2285 conditions per place. [2024-06-21 20:52:47,733 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 72 selfloop transitions, 44 changer transitions 0/120 dead transitions. [2024-06-21 20:52:47,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 1104 flow [2024-06-21 20:52:47,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:52:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:52:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:52:47,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:52:47,735 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 561 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:52:47,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 1104 flow [2024-06-21 20:52:47,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 120 transitions, 1045 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 20:52:47,755 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 791 flow [2024-06-21 20:52:47,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-06-21 20:52:47,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 20:52:47,756 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 791 flow [2024-06-21 20:52:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:47,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:52:47,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:47,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1204227751, now seen corresponding path program 3 times [2024-06-21 20:52:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413564840] [2024-06-21 20:52:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:48,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:48,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413564840] [2024-06-21 20:52:48,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413564840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:48,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:48,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:52:48,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581241448] [2024-06-21 20:52:48,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:48,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:52:48,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:52:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:52:48,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:48,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:48,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:48,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:48,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:49,175 INFO L124 PetriNetUnfolderBase]: 1707/2570 cut-off events. [2024-06-21 20:52:49,175 INFO L125 PetriNetUnfolderBase]: For 24255/24257 co-relation queries the response was YES. [2024-06-21 20:52:49,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2570 events. 1707/2570 cut-off events. For 24255/24257 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12091 event pairs, 607 based on Foata normal form. 8/2577 useless extension candidates. Maximal degree in co-relation 12995. Up to 2279 conditions per place. [2024-06-21 20:52:49,194 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 76 selfloop transitions, 38 changer transitions 0/118 dead transitions. [2024-06-21 20:52:49,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 1149 flow [2024-06-21 20:52:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:52:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:52:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 20:52:49,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-21 20:52:49,197 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 791 flow. Second operand 7 states and 137 transitions. [2024-06-21 20:52:49,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 1149 flow [2024-06-21 20:52:49,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 1071 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-21 20:52:49,224 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 799 flow [2024-06-21 20:52:49,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=799, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-21 20:52:49,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 20:52:49,226 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 799 flow [2024-06-21 20:52:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:49,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:49,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:49,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:52:49,226 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)] === [2024-06-21 20:52:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash 639418813, now seen corresponding path program 1 times [2024-06-21 20:52:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:49,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352378161] [2024-06-21 20:52:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:50,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:50,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352378161] [2024-06-21 20:52:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352378161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:50,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159369395] [2024-06-21 20:52:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:50,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:50,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:50,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 799 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:50,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:51,056 INFO L124 PetriNetUnfolderBase]: 1503/2363 cut-off events. [2024-06-21 20:52:51,056 INFO L125 PetriNetUnfolderBase]: For 21095/21095 co-relation queries the response was YES. [2024-06-21 20:52:51,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11544 conditions, 2363 events. 1503/2363 cut-off events. For 21095/21095 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11573 event pairs, 506 based on Foata normal form. 6/2368 useless extension candidates. Maximal degree in co-relation 11506. Up to 2157 conditions per place. [2024-06-21 20:52:51,077 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 24 changer transitions 0/123 dead transitions. [2024-06-21 20:52:51,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 1192 flow [2024-06-21 20:52:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:52:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:52:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:52:51,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:52:51,080 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 799 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:52:51,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 1192 flow [2024-06-21 20:52:51,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1056 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:52:51,107 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 767 flow [2024-06-21 20:52:51,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=767, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-21 20:52:51,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 20:52:51,108 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 767 flow [2024-06-21 20:52:51,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:51,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:51,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:51,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:52:51,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 368949640, now seen corresponding path program 1 times [2024-06-21 20:52:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038352943] [2024-06-21 20:52:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:51,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:51,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038352943] [2024-06-21 20:52:51,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038352943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:51,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:51,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:52:51,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318370947] [2024-06-21 20:52:51,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:51,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:52:51,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:52:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:52:51,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:52:51,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 767 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2024-06-21 20:52:51,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:51,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:52:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:52,288 INFO L124 PetriNetUnfolderBase]: 1500/2358 cut-off events. [2024-06-21 20:52:52,289 INFO L125 PetriNetUnfolderBase]: For 22704/22704 co-relation queries the response was YES. [2024-06-21 20:52:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11529 conditions, 2358 events. 1500/2358 cut-off events. For 22704/22704 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11551 event pairs, 525 based on Foata normal form. 1/2358 useless extension candidates. Maximal degree in co-relation 11493. Up to 2226 conditions per place. [2024-06-21 20:52:52,310 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2024-06-21 20:52:52,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 105 transitions, 990 flow [2024-06-21 20:52:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:52:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:52:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 20:52:52,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 20:52:52,312 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 767 flow. Second operand 5 states and 91 transitions. [2024-06-21 20:52:52,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 105 transitions, 990 flow [2024-06-21 20:52:52,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 105 transitions, 904 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:52:52,335 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 703 flow [2024-06-21 20:52:52,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=703, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-06-21 20:52:52,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-21 20:52:52,336 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 703 flow [2024-06-21 20:52:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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) [2024-06-21 20:52:52,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:52,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:52,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:52:52,337 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)] === [2024-06-21 20:52:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1434651697, now seen corresponding path program 1 times [2024-06-21 20:52:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327869748] [2024-06-21 20:52:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327869748] [2024-06-21 20:52:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327869748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:53,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:53,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653539939] [2024-06-21 20:52:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:53,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:53,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:53,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:53,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 703 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:54,196 INFO L124 PetriNetUnfolderBase]: 1709/2572 cut-off events. [2024-06-21 20:52:54,196 INFO L125 PetriNetUnfolderBase]: For 29061/29061 co-relation queries the response was YES. [2024-06-21 20:52:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12797 conditions, 2572 events. 1709/2572 cut-off events. For 29061/29061 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12068 event pairs, 591 based on Foata normal form. 3/2574 useless extension candidates. Maximal degree in co-relation 12760. Up to 2450 conditions per place. [2024-06-21 20:52:54,213 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 28 changer transitions 0/139 dead transitions. [2024-06-21 20:52:54,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 139 transitions, 1268 flow [2024-06-21 20:52:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:52:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:52:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 20:52:54,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 20:52:54,215 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 703 flow. Second operand 8 states and 154 transitions. [2024-06-21 20:52:54,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 139 transitions, 1268 flow [2024-06-21 20:52:54,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 139 transitions, 1246 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:52:54,243 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 904 flow [2024-06-21 20:52:54,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=904, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-21 20:52:54,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-21 20:52:54,245 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 904 flow [2024-06-21 20:52:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:54,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:54,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:52:54,246 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)] === [2024-06-21 20:52:54,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1438376564, now seen corresponding path program 1 times [2024-06-21 20:52:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752955053] [2024-06-21 20:52:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:54,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:55,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:55,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752955053] [2024-06-21 20:52:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752955053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:55,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275648602] [2024-06-21 20:52:55,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:55,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:55,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:55,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:55,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:55,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:55,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:55,738 INFO L124 PetriNetUnfolderBase]: 1727/2602 cut-off events. [2024-06-21 20:52:55,738 INFO L125 PetriNetUnfolderBase]: For 34697/34697 co-relation queries the response was YES. [2024-06-21 20:52:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 2602 events. 1727/2602 cut-off events. For 34697/34697 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12328 event pairs, 557 based on Foata normal form. 3/2604 useless extension candidates. Maximal degree in co-relation 13754. Up to 2485 conditions per place. [2024-06-21 20:52:55,758 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 119 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-21 20:52:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 149 transitions, 1440 flow [2024-06-21 20:52:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:52:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:52:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 20:52:55,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 20:52:55,760 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 904 flow. Second operand 8 states and 150 transitions. [2024-06-21 20:52:55,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 149 transitions, 1440 flow [2024-06-21 20:52:55,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 1356 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:55,793 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1028 flow [2024-06-21 20:52:55,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-06-21 20:52:55,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 20:52:55,794 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1028 flow [2024-06-21 20:52:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:55,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:55,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:55,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:52:55,795 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:52:55,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1323847980, now seen corresponding path program 2 times [2024-06-21 20:52:55,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:55,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215830355] [2024-06-21 20:52:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:55,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:56,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215830355] [2024-06-21 20:52:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215830355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:56,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:56,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684129426] [2024-06-21 20:52:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:56,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:56,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:56,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:56,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:56,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:57,375 INFO L124 PetriNetUnfolderBase]: 1745/2634 cut-off events. [2024-06-21 20:52:57,375 INFO L125 PetriNetUnfolderBase]: For 38773/38775 co-relation queries the response was YES. [2024-06-21 20:52:57,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14595 conditions, 2634 events. 1745/2634 cut-off events. For 38773/38775 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12489 event pairs, 543 based on Foata normal form. 5/2638 useless extension candidates. Maximal degree in co-relation 14552. Up to 2428 conditions per place. [2024-06-21 20:52:57,391 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 115 selfloop transitions, 46 changer transitions 0/165 dead transitions. [2024-06-21 20:52:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1642 flow [2024-06-21 20:52:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 20:52:57,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 20:52:57,395 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1028 flow. Second operand 9 states and 161 transitions. [2024-06-21 20:52:57,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1642 flow [2024-06-21 20:52:57,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 165 transitions, 1580 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:57,442 INFO L231 Difference]: Finished difference. Result has 107 places, 138 transitions, 1289 flow [2024-06-21 20:52:57,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=107, PETRI_TRANSITIONS=138} [2024-06-21 20:52:57,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 20:52:57,443 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 138 transitions, 1289 flow [2024-06-21 20:52:57,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:57,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:57,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:57,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:52:57,443 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)] === [2024-06-21 20:52:57,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1652862348, now seen corresponding path program 3 times [2024-06-21 20:52:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227982007] [2024-06-21 20:52:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:57,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:52:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:52:58,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:52:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227982007] [2024-06-21 20:52:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227982007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:52:58,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:52:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:52:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941534804] [2024-06-21 20:52:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:52:58,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:52:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:52:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:52:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:52:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:52:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 138 transitions, 1289 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:52:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:52:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:52:59,039 INFO L124 PetriNetUnfolderBase]: 1771/2666 cut-off events. [2024-06-21 20:52:59,040 INFO L125 PetriNetUnfolderBase]: For 43644/43646 co-relation queries the response was YES. [2024-06-21 20:52:59,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 2666 events. 1771/2666 cut-off events. For 43644/43646 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12703 event pairs, 543 based on Foata normal form. 5/2670 useless extension candidates. Maximal degree in co-relation 15690. Up to 2410 conditions per place. [2024-06-21 20:52:59,054 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 110 selfloop transitions, 61 changer transitions 0/175 dead transitions. [2024-06-21 20:52:59,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 1976 flow [2024-06-21 20:52:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:52:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:52:59,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 20:52:59,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 20:52:59,056 INFO L175 Difference]: Start difference. First operand has 107 places, 138 transitions, 1289 flow. Second operand 9 states and 164 transitions. [2024-06-21 20:52:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 1976 flow [2024-06-21 20:52:59,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1906 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 20:52:59,089 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1486 flow [2024-06-21 20:52:59,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1486, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-21 20:52:59,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 20:52:59,090 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1486 flow [2024-06-21 20:52:59,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:52:59,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:52:59,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:52:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:52:59,091 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)] === [2024-06-21 20:52:59,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:52:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2108878720, now seen corresponding path program 4 times [2024-06-21 20:52:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:52:59,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282452611] [2024-06-21 20:52:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:52:59,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:52:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:00,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:00,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282452611] [2024-06-21 20:53:00,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282452611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:00,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:00,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320745142] [2024-06-21 20:53:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:00,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:00,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:00,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1486 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:00,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:00,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:00,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:00,709 INFO L124 PetriNetUnfolderBase]: 1765/2663 cut-off events. [2024-06-21 20:53:00,709 INFO L125 PetriNetUnfolderBase]: For 47834/47836 co-relation queries the response was YES. [2024-06-21 20:53:00,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 2663 events. 1765/2663 cut-off events. For 47834/47836 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12699 event pairs, 543 based on Foata normal form. 5/2667 useless extension candidates. Maximal degree in co-relation 16342. Up to 2457 conditions per place. [2024-06-21 20:53:00,726 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 129 selfloop transitions, 41 changer transitions 0/174 dead transitions. [2024-06-21 20:53:00,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 2015 flow [2024-06-21 20:53:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:53:00,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:53:00,728 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1486 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:53:00,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 174 transitions, 2015 flow [2024-06-21 20:53:00,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 174 transitions, 1864 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:00,784 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1426 flow [2024-06-21 20:53:00,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1426, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-06-21 20:53:00,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 20:53:00,785 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1426 flow [2024-06-21 20:53:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:00,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:00,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:53:00,786 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:00,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1447461146, now seen corresponding path program 1 times [2024-06-21 20:53:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891976914] [2024-06-21 20:53:00,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:00,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:01,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:01,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891976914] [2024-06-21 20:53:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891976914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:01,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:01,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:53:01,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098178328] [2024-06-21 20:53:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:01,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:53:01,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:01,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:53:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:53:01,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:01,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1426 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:01,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:01,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:01,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:02,083 INFO L124 PetriNetUnfolderBase]: 1552/2437 cut-off events. [2024-06-21 20:53:02,083 INFO L125 PetriNetUnfolderBase]: For 41571/41571 co-relation queries the response was YES. [2024-06-21 20:53:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14732 conditions, 2437 events. 1552/2437 cut-off events. For 41571/41571 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11965 event pairs, 467 based on Foata normal form. 2/2438 useless extension candidates. Maximal degree in co-relation 14680. Up to 2296 conditions per place. [2024-06-21 20:53:02,099 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 143 selfloop transitions, 11 changer transitions 0/159 dead transitions. [2024-06-21 20:53:02,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 159 transitions, 1791 flow [2024-06-21 20:53:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 20:53:02,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:53:02,100 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1426 flow. Second operand 6 states and 106 transitions. [2024-06-21 20:53:02,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 159 transitions, 1791 flow [2024-06-21 20:53:02,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 159 transitions, 1621 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 20:53:02,132 INFO L231 Difference]: Finished difference. Result has 114 places, 149 transitions, 1320 flow [2024-06-21 20:53:02,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1320, PETRI_PLACES=114, PETRI_TRANSITIONS=149} [2024-06-21 20:53:02,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 20:53:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 149 transitions, 1320 flow [2024-06-21 20:53:02,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:53:02,134 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)] === [2024-06-21 20:53:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1234702024, now seen corresponding path program 1 times [2024-06-21 20:53:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349235851] [2024-06-21 20:53:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349235851] [2024-06-21 20:53:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349235851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:03,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:03,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:03,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186427891] [2024-06-21 20:53:03,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:03,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:03,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:03,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 149 transitions, 1320 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:03,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:03,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:03,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:03,837 INFO L124 PetriNetUnfolderBase]: 1695/2593 cut-off events. [2024-06-21 20:53:03,837 INFO L125 PetriNetUnfolderBase]: For 53119/53121 co-relation queries the response was YES. [2024-06-21 20:53:03,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 2593 events. 1695/2593 cut-off events. For 53119/53121 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12585 event pairs, 350 based on Foata normal form. 6/2598 useless extension candidates. Maximal degree in co-relation 15976. Up to 2316 conditions per place. [2024-06-21 20:53:03,851 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 16 changer transitions 0/181 dead transitions. [2024-06-21 20:53:03,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 181 transitions, 1755 flow [2024-06-21 20:53:03,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:53:03,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:53:03,852 INFO L175 Difference]: Start difference. First operand has 114 places, 149 transitions, 1320 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:53:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 181 transitions, 1755 flow [2024-06-21 20:53:03,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 181 transitions, 1715 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:53:03,884 INFO L231 Difference]: Finished difference. Result has 118 places, 151 transitions, 1371 flow [2024-06-21 20:53:03,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1371, PETRI_PLACES=118, PETRI_TRANSITIONS=151} [2024-06-21 20:53:03,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 20:53:03,885 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 151 transitions, 1371 flow [2024-06-21 20:53:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:03,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:03,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:03,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:53:03,886 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:03,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:03,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1231845064, now seen corresponding path program 2 times [2024-06-21 20:53:03,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:03,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041660614] [2024-06-21 20:53:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:03,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:04,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:04,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041660614] [2024-06-21 20:53:04,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041660614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:04,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:04,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523272255] [2024-06-21 20:53:04,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:04,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:05,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:05,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 151 transitions, 1371 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:05,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:05,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:05,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:05,706 INFO L124 PetriNetUnfolderBase]: 1712/2620 cut-off events. [2024-06-21 20:53:05,706 INFO L125 PetriNetUnfolderBase]: For 58581/58583 co-relation queries the response was YES. [2024-06-21 20:53:05,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16556 conditions, 2620 events. 1712/2620 cut-off events. For 58581/58583 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12784 event pairs, 473 based on Foata normal form. 6/2625 useless extension candidates. Maximal degree in co-relation 16504. Up to 2369 conditions per place. [2024-06-21 20:53:05,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 17 changer transitions 0/182 dead transitions. [2024-06-21 20:53:05,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 182 transitions, 1810 flow [2024-06-21 20:53:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 20:53:05,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:53:05,730 INFO L175 Difference]: Start difference. First operand has 118 places, 151 transitions, 1371 flow. Second operand 8 states and 152 transitions. [2024-06-21 20:53:05,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 182 transitions, 1810 flow [2024-06-21 20:53:05,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 182 transitions, 1737 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:05,787 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1395 flow [2024-06-21 20:53:05,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1395, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2024-06-21 20:53:05,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 20:53:05,789 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1395 flow [2024-06-21 20:53:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:53:05,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:05,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1116553894, now seen corresponding path program 3 times [2024-06-21 20:53:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994540123] [2024-06-21 20:53:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:05,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994540123] [2024-06-21 20:53:06,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994540123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:06,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:06,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487491889] [2024-06-21 20:53:06,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:06,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:06,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:06,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:06,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:06,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:06,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1395 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:06,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:06,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:06,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:07,565 INFO L124 PetriNetUnfolderBase]: 1729/2645 cut-off events. [2024-06-21 20:53:07,565 INFO L125 PetriNetUnfolderBase]: For 65290/65292 co-relation queries the response was YES. [2024-06-21 20:53:07,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17007 conditions, 2645 events. 1729/2645 cut-off events. For 65290/65292 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12830 event pairs, 469 based on Foata normal form. 6/2650 useless extension candidates. Maximal degree in co-relation 16954. Up to 2402 conditions per place. [2024-06-21 20:53:07,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 138 selfloop transitions, 17 changer transitions 0/183 dead transitions. [2024-06-21 20:53:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 183 transitions, 1841 flow [2024-06-21 20:53:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:53:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:53:07,585 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1395 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:53:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 183 transitions, 1841 flow [2024-06-21 20:53:07,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 1762 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:07,673 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1434 flow [2024-06-21 20:53:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-21 20:53:07,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 20:53:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1434 flow [2024-06-21 20:53:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:53:07,674 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:07,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1524530434, now seen corresponding path program 1 times [2024-06-21 20:53:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535532266] [2024-06-21 20:53:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:08,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:08,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535532266] [2024-06-21 20:53:08,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535532266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:08,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:08,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908349400] [2024-06-21 20:53:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:09,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:09,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1434 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:09,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:09,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:09,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:09,733 INFO L124 PetriNetUnfolderBase]: 1825/2745 cut-off events. [2024-06-21 20:53:09,734 INFO L125 PetriNetUnfolderBase]: For 70485/70485 co-relation queries the response was YES. [2024-06-21 20:53:09,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17891 conditions, 2745 events. 1825/2745 cut-off events. For 70485/70485 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13043 event pairs, 476 based on Foata normal form. 3/2747 useless extension candidates. Maximal degree in co-relation 17836. Up to 2613 conditions per place. [2024-06-21 20:53:09,753 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 160 selfloop transitions, 32 changer transitions 0/196 dead transitions. [2024-06-21 20:53:09,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 196 transitions, 2131 flow [2024-06-21 20:53:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:53:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:53:09,755 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1434 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:53:09,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 196 transitions, 2131 flow [2024-06-21 20:53:09,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 196 transitions, 2048 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:09,816 INFO L231 Difference]: Finished difference. Result has 127 places, 161 transitions, 1514 flow [2024-06-21 20:53:09,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1514, PETRI_PLACES=127, PETRI_TRANSITIONS=161} [2024-06-21 20:53:09,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 20:53:09,817 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 161 transitions, 1514 flow [2024-06-21 20:53:09,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:09,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:09,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:09,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:53:09,817 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:09,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1116548934, now seen corresponding path program 2 times [2024-06-21 20:53:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:09,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129808966] [2024-06-21 20:53:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:09,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129808966] [2024-06-21 20:53:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129808966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196437591] [2024-06-21 20:53:10,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:11,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:11,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 161 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:11,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:11,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:11,703 INFO L124 PetriNetUnfolderBase]: 1861/2810 cut-off events. [2024-06-21 20:53:11,703 INFO L125 PetriNetUnfolderBase]: For 76124/76124 co-relation queries the response was YES. [2024-06-21 20:53:11,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18723 conditions, 2810 events. 1861/2810 cut-off events. For 76124/76124 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13436 event pairs, 477 based on Foata normal form. 3/2812 useless extension candidates. Maximal degree in co-relation 18667. Up to 2636 conditions per place. [2024-06-21 20:53:11,723 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 160 selfloop transitions, 37 changer transitions 0/201 dead transitions. [2024-06-21 20:53:11,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 201 transitions, 2253 flow [2024-06-21 20:53:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:53:11,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:53:11,724 INFO L175 Difference]: Start difference. First operand has 127 places, 161 transitions, 1514 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:53:11,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 201 transitions, 2253 flow [2024-06-21 20:53:11,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 201 transitions, 2120 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:11,782 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 1598 flow [2024-06-21 20:53:11,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1598, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-06-21 20:53:11,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 20:53:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 1598 flow [2024-06-21 20:53:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:11,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:11,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:53:11,784 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)] === [2024-06-21 20:53:11,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1640001094, now seen corresponding path program 3 times [2024-06-21 20:53:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:11,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081263459] [2024-06-21 20:53:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:12,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:12,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081263459] [2024-06-21 20:53:12,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081263459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:12,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:12,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891046352] [2024-06-21 20:53:12,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:12,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:12,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:12,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:12,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:12,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 1598 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:12,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:12,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:12,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:13,627 INFO L124 PetriNetUnfolderBase]: 1903/2873 cut-off events. [2024-06-21 20:53:13,627 INFO L125 PetriNetUnfolderBase]: For 85133/85133 co-relation queries the response was YES. [2024-06-21 20:53:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19839 conditions, 2873 events. 1903/2873 cut-off events. For 85133/85133 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13797 event pairs, 477 based on Foata normal form. 3/2875 useless extension candidates. Maximal degree in co-relation 19781. Up to 2654 conditions per place. [2024-06-21 20:53:13,647 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 159 selfloop transitions, 51 changer transitions 0/214 dead transitions. [2024-06-21 20:53:13,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 214 transitions, 2505 flow [2024-06-21 20:53:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:53:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:53:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:53:13,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 20:53:13,648 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 1598 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:53:13,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 214 transitions, 2505 flow [2024-06-21 20:53:13,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 214 transitions, 2352 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:13,718 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 1760 flow [2024-06-21 20:53:13,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1760, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-21 20:53:13,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 20:53:13,718 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 1760 flow [2024-06-21 20:53:13,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:13,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:13,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:53:13,719 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:13,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:13,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1640001342, now seen corresponding path program 1 times [2024-06-21 20:53:13,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:13,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938231556] [2024-06-21 20:53:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:14,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:14,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938231556] [2024-06-21 20:53:14,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938231556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:14,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:14,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158590293] [2024-06-21 20:53:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:14,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:14,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:14,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:14,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 1760 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:14,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:14,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:14,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:15,460 INFO L124 PetriNetUnfolderBase]: 2049/3113 cut-off events. [2024-06-21 20:53:15,460 INFO L125 PetriNetUnfolderBase]: For 109288/109288 co-relation queries the response was YES. [2024-06-21 20:53:15,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21938 conditions, 3113 events. 2049/3113 cut-off events. For 109288/109288 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15419 event pairs, 492 based on Foata normal form. 39/3151 useless extension candidates. Maximal degree in co-relation 21880. Up to 2682 conditions per place. [2024-06-21 20:53:15,480 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 163 selfloop transitions, 49 changer transitions 0/216 dead transitions. [2024-06-21 20:53:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 216 transitions, 2493 flow [2024-06-21 20:53:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 20:53:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-21 20:53:15,481 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 1760 flow. Second operand 9 states and 176 transitions. [2024-06-21 20:53:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 216 transitions, 2493 flow [2024-06-21 20:53:15,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 216 transitions, 2255 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-21 20:53:15,576 INFO L231 Difference]: Finished difference. Result has 136 places, 180 transitions, 1735 flow [2024-06-21 20:53:15,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=136, PETRI_TRANSITIONS=180} [2024-06-21 20:53:15,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 20:53:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 180 transitions, 1735 flow [2024-06-21 20:53:15,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:15,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:15,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:15,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:53:15,577 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:15,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1933638961, now seen corresponding path program 1 times [2024-06-21 20:53:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:15,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932259567] [2024-06-21 20:53:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932259567] [2024-06-21 20:53:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932259567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:16,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:16,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:53:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288766282] [2024-06-21 20:53:16,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:53:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:53:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:53:16,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:16,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 180 transitions, 1735 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:16,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:16,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:16,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:16,905 INFO L124 PetriNetUnfolderBase]: 2059/3129 cut-off events. [2024-06-21 20:53:16,905 INFO L125 PetriNetUnfolderBase]: For 108843/108843 co-relation queries the response was YES. [2024-06-21 20:53:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22677 conditions, 3129 events. 2059/3129 cut-off events. For 108843/108843 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15530 event pairs, 500 based on Foata normal form. 2/3130 useless extension candidates. Maximal degree in co-relation 22618. Up to 3021 conditions per place. [2024-06-21 20:53:16,931 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 176 selfloop transitions, 22 changer transitions 0/202 dead transitions. [2024-06-21 20:53:16,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 202 transitions, 2313 flow [2024-06-21 20:53:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 20:53:16,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 20:53:16,933 INFO L175 Difference]: Start difference. First operand has 136 places, 180 transitions, 1735 flow. Second operand 6 states and 111 transitions. [2024-06-21 20:53:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 202 transitions, 2313 flow [2024-06-21 20:53:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 202 transitions, 2195 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:17,021 INFO L231 Difference]: Finished difference. Result has 135 places, 185 transitions, 1739 flow [2024-06-21 20:53:17,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1739, PETRI_PLACES=135, PETRI_TRANSITIONS=185} [2024-06-21 20:53:17,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 20:53:17,021 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 1739 flow [2024-06-21 20:53:17,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:17,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:17,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:17,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:53:17,022 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)] === [2024-06-21 20:53:17,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:17,022 INFO L85 PathProgramCache]: Analyzing trace with hash 186051486, now seen corresponding path program 4 times [2024-06-21 20:53:17,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:17,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555743432] [2024-06-21 20:53:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:17,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555743432] [2024-06-21 20:53:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555743432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:53:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137312944] [2024-06-21 20:53:17,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:17,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:53:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:53:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:53:17,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:17,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 1739 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:17,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:17,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:17,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:18,520 INFO L124 PetriNetUnfolderBase]: 1955/3020 cut-off events. [2024-06-21 20:53:18,521 INFO L125 PetriNetUnfolderBase]: For 108000/108004 co-relation queries the response was YES. [2024-06-21 20:53:18,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21479 conditions, 3020 events. 1955/3020 cut-off events. For 108000/108004 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15361 event pairs, 462 based on Foata normal form. 8/3027 useless extension candidates. Maximal degree in co-relation 21419. Up to 2700 conditions per place. [2024-06-21 20:53:18,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 24 changer transitions 0/212 dead transitions. [2024-06-21 20:53:18,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 212 transitions, 2227 flow [2024-06-21 20:53:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:53:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:53:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 20:53:18,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 20:53:18,545 INFO L175 Difference]: Start difference. First operand has 135 places, 185 transitions, 1739 flow. Second operand 8 states and 149 transitions. [2024-06-21 20:53:18,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 212 transitions, 2227 flow [2024-06-21 20:53:18,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 212 transitions, 2176 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:53:18,623 INFO L231 Difference]: Finished difference. Result has 141 places, 189 transitions, 1831 flow [2024-06-21 20:53:18,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1831, PETRI_PLACES=141, PETRI_TRANSITIONS=189} [2024-06-21 20:53:18,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 20:53:18,624 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 189 transitions, 1831 flow [2024-06-21 20:53:18,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:18,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:18,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:18,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:53:18,625 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)] === [2024-06-21 20:53:18,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:18,625 INFO L85 PathProgramCache]: Analyzing trace with hash 414130576, now seen corresponding path program 4 times [2024-06-21 20:53:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539104131] [2024-06-21 20:53:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:19,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:19,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539104131] [2024-06-21 20:53:19,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539104131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:19,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:19,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:19,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407143486] [2024-06-21 20:53:19,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:19,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:20,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:20,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 189 transitions, 1831 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:20,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:20,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:20,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:20,677 INFO L124 PetriNetUnfolderBase]: 2069/3149 cut-off events. [2024-06-21 20:53:20,677 INFO L125 PetriNetUnfolderBase]: For 117900/117902 co-relation queries the response was YES. [2024-06-21 20:53:20,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22860 conditions, 3149 events. 2069/3149 cut-off events. For 117900/117902 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15648 event pairs, 479 based on Foata normal form. 5/3153 useless extension candidates. Maximal degree in co-relation 22798. Up to 2819 conditions per place. [2024-06-21 20:53:20,698 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 146 selfloop transitions, 71 changer transitions 0/221 dead transitions. [2024-06-21 20:53:20,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 221 transitions, 2567 flow [2024-06-21 20:53:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:53:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:53:20,700 INFO L175 Difference]: Start difference. First operand has 141 places, 189 transitions, 1831 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:53:20,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 221 transitions, 2567 flow [2024-06-21 20:53:20,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 221 transitions, 2458 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:20,792 INFO L231 Difference]: Finished difference. Result has 145 places, 193 transitions, 1993 flow [2024-06-21 20:53:20,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1993, PETRI_PLACES=145, PETRI_TRANSITIONS=193} [2024-06-21 20:53:20,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 20:53:20,792 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 193 transitions, 1993 flow [2024-06-21 20:53:20,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:20,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:20,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:20,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:53:20,793 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:20,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 414137086, now seen corresponding path program 5 times [2024-06-21 20:53:20,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:20,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071339933] [2024-06-21 20:53:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:20,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:22,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071339933] [2024-06-21 20:53:22,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071339933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:22,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:22,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883674275] [2024-06-21 20:53:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:22,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:22,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 193 transitions, 1993 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:22,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:22,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:22,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:22,894 INFO L124 PetriNetUnfolderBase]: 2087/3175 cut-off events. [2024-06-21 20:53:22,894 INFO L125 PetriNetUnfolderBase]: For 126010/126010 co-relation queries the response was YES. [2024-06-21 20:53:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 3175 events. 2087/3175 cut-off events. For 126010/126010 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15818 event pairs, 481 based on Foata normal form. 3/3177 useless extension candidates. Maximal degree in co-relation 23728. Up to 2759 conditions per place. [2024-06-21 20:53:22,920 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 129 selfloop transitions, 93 changer transitions 0/226 dead transitions. [2024-06-21 20:53:22,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 226 transitions, 2755 flow [2024-06-21 20:53:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:53:22,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:53:22,921 INFO L175 Difference]: Start difference. First operand has 145 places, 193 transitions, 1993 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:53:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 226 transitions, 2755 flow [2024-06-21 20:53:23,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 226 transitions, 2500 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 20:53:23,032 INFO L231 Difference]: Finished difference. Result has 146 places, 197 transitions, 2061 flow [2024-06-21 20:53:23,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2061, PETRI_PLACES=146, PETRI_TRANSITIONS=197} [2024-06-21 20:53:23,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 20:53:23,033 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 197 transitions, 2061 flow [2024-06-21 20:53:23,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:23,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:23,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:23,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:53:23,033 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:23,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1916820610, now seen corresponding path program 6 times [2024-06-21 20:53:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377745461] [2024-06-21 20:53:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377745461] [2024-06-21 20:53:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377745461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:24,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:24,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820143660] [2024-06-21 20:53:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:24,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:24,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:24,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 197 transitions, 2061 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:24,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:24,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:24,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:25,126 INFO L124 PetriNetUnfolderBase]: 2123/3243 cut-off events. [2024-06-21 20:53:25,126 INFO L125 PetriNetUnfolderBase]: For 135106/135108 co-relation queries the response was YES. [2024-06-21 20:53:25,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24701 conditions, 3243 events. 2123/3243 cut-off events. For 135106/135108 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16313 event pairs, 487 based on Foata normal form. 5/3247 useless extension candidates. Maximal degree in co-relation 24638. Up to 2890 conditions per place. [2024-06-21 20:53:25,149 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 167 selfloop transitions, 64 changer transitions 0/235 dead transitions. [2024-06-21 20:53:25,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 3017 flow [2024-06-21 20:53:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:53:25,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:53:25,151 INFO L175 Difference]: Start difference. First operand has 146 places, 197 transitions, 2061 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:53:25,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 3017 flow [2024-06-21 20:53:25,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 235 transitions, 2716 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:25,266 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2077 flow [2024-06-21 20:53:25,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2077, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-21 20:53:25,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 20:53:25,267 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2077 flow [2024-06-21 20:53:25,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:25,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:25,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:25,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:53:25,268 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:25,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1916640872, now seen corresponding path program 2 times [2024-06-21 20:53:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:25,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106384891] [2024-06-21 20:53:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:25,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106384891] [2024-06-21 20:53:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106384891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192810462] [2024-06-21 20:53:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:26,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:26,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:26,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2077 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:26,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:26,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:26,985 INFO L124 PetriNetUnfolderBase]: 2293/3517 cut-off events. [2024-06-21 20:53:26,986 INFO L125 PetriNetUnfolderBase]: For 171715/171717 co-relation queries the response was YES. [2024-06-21 20:53:27,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27464 conditions, 3517 events. 2293/3517 cut-off events. For 171715/171717 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18144 event pairs, 503 based on Foata normal form. 41/3557 useless extension candidates. Maximal degree in co-relation 27399. Up to 2910 conditions per place. [2024-06-21 20:53:27,016 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 167 selfloop transitions, 75 changer transitions 0/246 dead transitions. [2024-06-21 20:53:27,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 246 transitions, 3123 flow [2024-06-21 20:53:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:53:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-21 20:53:27,017 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2077 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:53:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 246 transitions, 3123 flow [2024-06-21 20:53:27,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 246 transitions, 2866 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:27,142 INFO L231 Difference]: Finished difference. Result has 153 places, 212 transitions, 2245 flow [2024-06-21 20:53:27,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2245, PETRI_PLACES=153, PETRI_TRANSITIONS=212} [2024-06-21 20:53:27,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 20:53:27,142 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 212 transitions, 2245 flow [2024-06-21 20:53:27,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:27,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:53:27,142 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:27,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash 422708214, now seen corresponding path program 3 times [2024-06-21 20:53:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515468136] [2024-06-21 20:53:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:28,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:28,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515468136] [2024-06-21 20:53:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515468136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:28,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338007435] [2024-06-21 20:53:28,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:28,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:28,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:28,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:28,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 212 transitions, 2245 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:28,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:28,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:28,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:29,016 INFO L124 PetriNetUnfolderBase]: 2504/3850 cut-off events. [2024-06-21 20:53:29,016 INFO L125 PetriNetUnfolderBase]: For 208045/208047 co-relation queries the response was YES. [2024-06-21 20:53:29,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32358 conditions, 3850 events. 2504/3850 cut-off events. For 208045/208047 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20331 event pairs, 493 based on Foata normal form. 8/3857 useless extension candidates. Maximal degree in co-relation 32292. Up to 2588 conditions per place. [2024-06-21 20:53:29,052 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 127 selfloop transitions, 123 changer transitions 0/254 dead transitions. [2024-06-21 20:53:29,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 254 transitions, 3363 flow [2024-06-21 20:53:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:53:29,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-21 20:53:29,054 INFO L175 Difference]: Start difference. First operand has 153 places, 212 transitions, 2245 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:53:29,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 254 transitions, 3363 flow [2024-06-21 20:53:29,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 254 transitions, 3124 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:29,277 INFO L231 Difference]: Finished difference. Result has 156 places, 218 transitions, 2478 flow [2024-06-21 20:53:29,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=156, PETRI_TRANSITIONS=218} [2024-06-21 20:53:29,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 20:53:29,278 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 218 transitions, 2478 flow [2024-06-21 20:53:29,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:29,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:29,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:53:29,278 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:29,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash 414137334, now seen corresponding path program 4 times [2024-06-21 20:53:29,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:29,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544717819] [2024-06-21 20:53:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:30,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:30,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544717819] [2024-06-21 20:53:30,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544717819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:30,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:30,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:30,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062409085] [2024-06-21 20:53:30,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:30,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:30,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:30,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:30,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 218 transitions, 2478 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:30,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:30,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:30,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:31,013 INFO L124 PetriNetUnfolderBase]: 2486/3828 cut-off events. [2024-06-21 20:53:31,014 INFO L125 PetriNetUnfolderBase]: For 205581/205583 co-relation queries the response was YES. [2024-06-21 20:53:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31507 conditions, 3828 events. 2486/3828 cut-off events. For 205581/205583 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20236 event pairs, 525 based on Foata normal form. 38/3865 useless extension candidates. Maximal degree in co-relation 31440. Up to 3258 conditions per place. [2024-06-21 20:53:31,045 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 169 selfloop transitions, 81 changer transitions 0/254 dead transitions. [2024-06-21 20:53:31,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 254 transitions, 3360 flow [2024-06-21 20:53:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 20:53:31,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 20:53:31,046 INFO L175 Difference]: Start difference. First operand has 156 places, 218 transitions, 2478 flow. Second operand 9 states and 175 transitions. [2024-06-21 20:53:31,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 254 transitions, 3360 flow [2024-06-21 20:53:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 254 transitions, 3114 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:31,298 INFO L231 Difference]: Finished difference. Result has 160 places, 221 transitions, 2519 flow [2024-06-21 20:53:31,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2519, PETRI_PLACES=160, PETRI_TRANSITIONS=221} [2024-06-21 20:53:31,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 20:53:31,298 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 221 transitions, 2519 flow [2024-06-21 20:53:31,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:31,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:31,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:31,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:53:31,298 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:31,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:31,299 INFO L85 PathProgramCache]: Analyzing trace with hash 186235936, now seen corresponding path program 7 times [2024-06-21 20:53:31,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:31,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244193325] [2024-06-21 20:53:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:31,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:32,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244193325] [2024-06-21 20:53:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244193325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:32,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981123394] [2024-06-21 20:53:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:32,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 221 transitions, 2519 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:32,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:33,094 INFO L124 PetriNetUnfolderBase]: 2504/3859 cut-off events. [2024-06-21 20:53:33,094 INFO L125 PetriNetUnfolderBase]: For 195024/195024 co-relation queries the response was YES. [2024-06-21 20:53:33,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32058 conditions, 3859 events. 2504/3859 cut-off events. For 195024/195024 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20528 event pairs, 529 based on Foata normal form. 3/3861 useless extension candidates. Maximal degree in co-relation 31989. Up to 3402 conditions per place. [2024-06-21 20:53:33,127 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 163 selfloop transitions, 88 changer transitions 0/255 dead transitions. [2024-06-21 20:53:33,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 255 transitions, 3457 flow [2024-06-21 20:53:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 20:53:33,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 20:53:33,128 INFO L175 Difference]: Start difference. First operand has 160 places, 221 transitions, 2519 flow. Second operand 9 states and 173 transitions. [2024-06-21 20:53:33,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 255 transitions, 3457 flow [2024-06-21 20:53:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 255 transitions, 3266 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:33,335 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 2665 flow [2024-06-21 20:53:33,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2665, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2024-06-21 20:53:33,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 20:53:33,336 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 2665 flow [2024-06-21 20:53:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:33,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:33,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:53:33,337 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:33,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 422411544, now seen corresponding path program 5 times [2024-06-21 20:53:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:33,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780630671] [2024-06-21 20:53:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:33,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780630671] [2024-06-21 20:53:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780630671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:34,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:34,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:34,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464375949] [2024-06-21 20:53:34,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:34,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:34,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:34,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 2665 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:34,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:34,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:34,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:35,335 INFO L124 PetriNetUnfolderBase]: 2494/3848 cut-off events. [2024-06-21 20:53:35,335 INFO L125 PetriNetUnfolderBase]: For 196080/196082 co-relation queries the response was YES. [2024-06-21 20:53:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31967 conditions, 3848 events. 2494/3848 cut-off events. For 196080/196082 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20459 event pairs, 525 based on Foata normal form. 8/3855 useless extension candidates. Maximal degree in co-relation 31897. Up to 3140 conditions per place. [2024-06-21 20:53:35,369 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 142 selfloop transitions, 116 changer transitions 0/262 dead transitions. [2024-06-21 20:53:35,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 262 transitions, 3477 flow [2024-06-21 20:53:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:53:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:53:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 20:53:35,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-21 20:53:35,370 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 2665 flow. Second operand 10 states and 194 transitions. [2024-06-21 20:53:35,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 262 transitions, 3477 flow [2024-06-21 20:53:35,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 262 transitions, 3150 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:35,619 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 2585 flow [2024-06-21 20:53:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2585, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-21 20:53:35,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-21 20:53:35,620 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 2585 flow [2024-06-21 20:53:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:53:35,621 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:35,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 300875334, now seen corresponding path program 8 times [2024-06-21 20:53:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508667598] [2024-06-21 20:53:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:36,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508667598] [2024-06-21 20:53:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508667598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:36,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:36,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016407097] [2024-06-21 20:53:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:36,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:36,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 2585 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:36,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:36,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:36,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:37,617 INFO L124 PetriNetUnfolderBase]: 2496/3851 cut-off events. [2024-06-21 20:53:37,617 INFO L125 PetriNetUnfolderBase]: For 198224/198224 co-relation queries the response was YES. [2024-06-21 20:53:37,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32126 conditions, 3851 events. 2496/3851 cut-off events. For 198224/198224 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20564 event pairs, 524 based on Foata normal form. 3/3853 useless extension candidates. Maximal degree in co-relation 32055. Up to 3248 conditions per place. [2024-06-21 20:53:37,648 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 113 selfloop transitions, 141 changer transitions 0/258 dead transitions. [2024-06-21 20:53:37,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 258 transitions, 3471 flow [2024-06-21 20:53:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:53:37,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:53:37,649 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 2585 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:53:37,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 258 transitions, 3471 flow [2024-06-21 20:53:37,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 258 transitions, 3142 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 20:53:37,856 INFO L231 Difference]: Finished difference. Result has 164 places, 229 transitions, 2711 flow [2024-06-21 20:53:37,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2711, PETRI_PLACES=164, PETRI_TRANSITIONS=229} [2024-06-21 20:53:37,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:53:37,856 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 229 transitions, 2711 flow [2024-06-21 20:53:37,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:37,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:37,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:37,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:53:37,857 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)] === [2024-06-21 20:53:37,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1921634521, now seen corresponding path program 2 times [2024-06-21 20:53:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350734252] [2024-06-21 20:53:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:37,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:38,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:38,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350734252] [2024-06-21 20:53:38,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350734252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:38,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:38,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:53:38,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080866369] [2024-06-21 20:53:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:53:38,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:53:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:53:38,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:38,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 229 transitions, 2711 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:38,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:38,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:38,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:39,279 INFO L124 PetriNetUnfolderBase]: 2490/3843 cut-off events. [2024-06-21 20:53:39,279 INFO L125 PetriNetUnfolderBase]: For 198429/198429 co-relation queries the response was YES. [2024-06-21 20:53:39,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31986 conditions, 3843 events. 2490/3843 cut-off events. For 198429/198429 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20488 event pairs, 543 based on Foata normal form. 2/3844 useless extension candidates. Maximal degree in co-relation 31915. Up to 3708 conditions per place. [2024-06-21 20:53:39,308 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 213 selfloop transitions, 22 changer transitions 0/239 dead transitions. [2024-06-21 20:53:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 239 transitions, 3218 flow [2024-06-21 20:53:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:53:39,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:53:39,309 INFO L175 Difference]: Start difference. First operand has 164 places, 229 transitions, 2711 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:53:39,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 239 transitions, 3218 flow [2024-06-21 20:53:39,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 239 transitions, 2777 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:39,501 INFO L231 Difference]: Finished difference. Result has 163 places, 229 transitions, 2322 flow [2024-06-21 20:53:39,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2322, PETRI_PLACES=163, PETRI_TRANSITIONS=229} [2024-06-21 20:53:39,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 20:53:39,502 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 229 transitions, 2322 flow [2024-06-21 20:53:39,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:39,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:39,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:39,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:53:39,503 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)] === [2024-06-21 20:53:39,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:39,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1851942597, now seen corresponding path program 1 times [2024-06-21 20:53:39,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:39,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725972097] [2024-06-21 20:53:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:39,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:40,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:40,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725972097] [2024-06-21 20:53:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725972097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:40,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:53:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217341804] [2024-06-21 20:53:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:40,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:53:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:53:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:53:40,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:40,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 229 transitions, 2322 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:40,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:40,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:40,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:40,738 INFO L124 PetriNetUnfolderBase]: 2288/3636 cut-off events. [2024-06-21 20:53:40,738 INFO L125 PetriNetUnfolderBase]: For 172167/172167 co-relation queries the response was YES. [2024-06-21 20:53:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28678 conditions, 3636 events. 2288/3636 cut-off events. For 172167/172167 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19950 event pairs, 452 based on Foata normal form. 2/3637 useless extension candidates. Maximal degree in co-relation 28606. Up to 3428 conditions per place. [2024-06-21 20:53:40,771 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 221 selfloop transitions, 19 changer transitions 0/245 dead transitions. [2024-06-21 20:53:40,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 245 transitions, 2946 flow [2024-06-21 20:53:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 20:53:40,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 20:53:40,772 INFO L175 Difference]: Start difference. First operand has 163 places, 229 transitions, 2322 flow. Second operand 6 states and 113 transitions. [2024-06-21 20:53:40,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 245 transitions, 2946 flow [2024-06-21 20:53:40,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 245 transitions, 2890 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:40,931 INFO L231 Difference]: Finished difference. Result has 164 places, 232 transitions, 2345 flow [2024-06-21 20:53:40,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2345, PETRI_PLACES=164, PETRI_TRANSITIONS=232} [2024-06-21 20:53:40,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 20:53:40,931 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 232 transitions, 2345 flow [2024-06-21 20:53:40,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:40,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:40,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:40,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:53:40,932 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)] === [2024-06-21 20:53:40,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1921628569, now seen corresponding path program 2 times [2024-06-21 20:53:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:40,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651996725] [2024-06-21 20:53:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:40,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651996725] [2024-06-21 20:53:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651996725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:53:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095390482] [2024-06-21 20:53:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:53:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:53:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:53:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:53:41,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 232 transitions, 2345 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:41,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:41,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:53:41,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:42,094 INFO L124 PetriNetUnfolderBase]: 2242/3559 cut-off events. [2024-06-21 20:53:42,094 INFO L125 PetriNetUnfolderBase]: For 174505/174505 co-relation queries the response was YES. [2024-06-21 20:53:42,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28242 conditions, 3559 events. 2242/3559 cut-off events. For 174505/174505 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19393 event pairs, 448 based on Foata normal form. 1/3559 useless extension candidates. Maximal degree in co-relation 28169. Up to 3385 conditions per place. [2024-06-21 20:53:42,121 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 225 selfloop transitions, 11 changer transitions 0/241 dead transitions. [2024-06-21 20:53:42,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 241 transitions, 2842 flow [2024-06-21 20:53:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:53:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:53:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:53:42,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:53:42,122 INFO L175 Difference]: Start difference. First operand has 164 places, 232 transitions, 2345 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:53:42,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 241 transitions, 2842 flow [2024-06-21 20:53:42,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 241 transitions, 2813 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:53:42,272 INFO L231 Difference]: Finished difference. Result has 167 places, 232 transitions, 2344 flow [2024-06-21 20:53:42,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2344, PETRI_PLACES=167, PETRI_TRANSITIONS=232} [2024-06-21 20:53:42,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 20:53:42,272 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 232 transitions, 2344 flow [2024-06-21 20:53:42,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:42,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:42,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:42,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:53:42,273 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:42,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:42,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1220019200, now seen corresponding path program 1 times [2024-06-21 20:53:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:42,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444292067] [2024-06-21 20:53:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:43,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:43,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444292067] [2024-06-21 20:53:43,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444292067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:43,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:43,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737034660] [2024-06-21 20:53:43,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:43,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:43,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:43,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:43,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 232 transitions, 2344 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:43,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:43,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:44,067 INFO L124 PetriNetUnfolderBase]: 2500/3851 cut-off events. [2024-06-21 20:53:44,067 INFO L125 PetriNetUnfolderBase]: For 218914/218914 co-relation queries the response was YES. [2024-06-21 20:53:44,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31898 conditions, 3851 events. 2500/3851 cut-off events. For 218914/218914 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20314 event pairs, 347 based on Foata normal form. 6/3856 useless extension candidates. Maximal degree in co-relation 31824. Up to 3589 conditions per place. [2024-06-21 20:53:44,098 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 240 selfloop transitions, 33 changer transitions 0/277 dead transitions. [2024-06-21 20:53:44,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 277 transitions, 3381 flow [2024-06-21 20:53:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:53:44,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:53:44,100 INFO L175 Difference]: Start difference. First operand has 167 places, 232 transitions, 2344 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:53:44,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 277 transitions, 3381 flow [2024-06-21 20:53:44,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 277 transitions, 3334 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:53:44,256 INFO L231 Difference]: Finished difference. Result has 172 places, 240 transitions, 2625 flow [2024-06-21 20:53:44,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2625, PETRI_PLACES=172, PETRI_TRANSITIONS=240} [2024-06-21 20:53:44,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 20:53:44,257 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 240 transitions, 2625 flow [2024-06-21 20:53:44,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:44,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:44,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:44,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:53:44,258 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:44,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1216209920, now seen corresponding path program 2 times [2024-06-21 20:53:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416171238] [2024-06-21 20:53:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:44,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416171238] [2024-06-21 20:53:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416171238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360670224] [2024-06-21 20:53:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:45,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:45,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 240 transitions, 2625 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:45,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:45,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:45,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:46,217 INFO L124 PetriNetUnfolderBase]: 2528/3895 cut-off events. [2024-06-21 20:53:46,217 INFO L125 PetriNetUnfolderBase]: For 233922/233922 co-relation queries the response was YES. [2024-06-21 20:53:46,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33056 conditions, 3895 events. 2528/3895 cut-off events. For 233922/233922 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20757 event pairs, 491 based on Foata normal form. 6/3900 useless extension candidates. Maximal degree in co-relation 32979. Up to 3703 conditions per place. [2024-06-21 20:53:46,249 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 36 changer transitions 0/277 dead transitions. [2024-06-21 20:53:46,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 3460 flow [2024-06-21 20:53:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 20:53:46,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 20:53:46,250 INFO L175 Difference]: Start difference. First operand has 172 places, 240 transitions, 2625 flow. Second operand 9 states and 169 transitions. [2024-06-21 20:53:46,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 3460 flow [2024-06-21 20:53:46,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 277 transitions, 3289 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 20:53:46,464 INFO L231 Difference]: Finished difference. Result has 177 places, 243 transitions, 2654 flow [2024-06-21 20:53:46,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2654, PETRI_PLACES=177, PETRI_TRANSITIONS=243} [2024-06-21 20:53:46,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 20:53:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 243 transitions, 2654 flow [2024-06-21 20:53:46,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:46,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:46,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:46,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:53:46,465 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:46,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 15650194, now seen corresponding path program 3 times [2024-06-21 20:53:46,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:46,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082103030] [2024-06-21 20:53:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:46,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:47,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082103030] [2024-06-21 20:53:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082103030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:47,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441179546] [2024-06-21 20:53:47,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:47,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:47,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:47,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 243 transitions, 2654 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:47,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:48,227 INFO L124 PetriNetUnfolderBase]: 2582/3977 cut-off events. [2024-06-21 20:53:48,228 INFO L125 PetriNetUnfolderBase]: For 246929/246929 co-relation queries the response was YES. [2024-06-21 20:53:48,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34208 conditions, 3977 events. 2582/3977 cut-off events. For 246929/246929 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 21276 event pairs, 499 based on Foata normal form. 6/3982 useless extension candidates. Maximal degree in co-relation 34129. Up to 3701 conditions per place. [2024-06-21 20:53:48,264 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 242 selfloop transitions, 39 changer transitions 0/285 dead transitions. [2024-06-21 20:53:48,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 285 transitions, 3681 flow [2024-06-21 20:53:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 20:53:48,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:53:48,265 INFO L175 Difference]: Start difference. First operand has 177 places, 243 transitions, 2654 flow. Second operand 9 states and 171 transitions. [2024-06-21 20:53:48,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 285 transitions, 3681 flow [2024-06-21 20:53:48,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 285 transitions, 3505 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 20:53:48,514 INFO L231 Difference]: Finished difference. Result has 180 places, 249 transitions, 2781 flow [2024-06-21 20:53:48,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2781, PETRI_PLACES=180, PETRI_TRANSITIONS=249} [2024-06-21 20:53:48,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 20:53:48,515 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 249 transitions, 2781 flow [2024-06-21 20:53:48,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:48,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:48,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:48,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:53:48,515 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:48,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash -253431590, now seen corresponding path program 4 times [2024-06-21 20:53:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:48,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890819085] [2024-06-21 20:53:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:49,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:49,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890819085] [2024-06-21 20:53:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890819085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:53:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160813355] [2024-06-21 20:53:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:49,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:53:49,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:53:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:53:49,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:49,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 249 transitions, 2781 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:49,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:49,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:50,390 INFO L124 PetriNetUnfolderBase]: 2636/4059 cut-off events. [2024-06-21 20:53:50,390 INFO L125 PetriNetUnfolderBase]: For 266530/266530 co-relation queries the response was YES. [2024-06-21 20:53:50,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35617 conditions, 4059 events. 2636/4059 cut-off events. For 266530/266530 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21777 event pairs, 513 based on Foata normal form. 6/4064 useless extension candidates. Maximal degree in co-relation 35536. Up to 3747 conditions per place. [2024-06-21 20:53:50,425 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 40 changer transitions 0/291 dead transitions. [2024-06-21 20:53:50,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 291 transitions, 3970 flow [2024-06-21 20:53:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:53:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:53:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:53:50,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:53:50,428 INFO L175 Difference]: Start difference. First operand has 180 places, 249 transitions, 2781 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:53:50,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 291 transitions, 3970 flow [2024-06-21 20:53:50,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 291 transitions, 3789 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:50,768 INFO L231 Difference]: Finished difference. Result has 185 places, 256 transitions, 2944 flow [2024-06-21 20:53:50,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2944, PETRI_PLACES=185, PETRI_TRANSITIONS=256} [2024-06-21 20:53:50,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 20:53:50,769 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 256 transitions, 2944 flow [2024-06-21 20:53:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:53:50,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:50,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:53:50,770 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:50,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:50,770 INFO L85 PathProgramCache]: Analyzing trace with hash 467663258, now seen corresponding path program 1 times [2024-06-21 20:53:50,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:50,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292145972] [2024-06-21 20:53:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:50,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:52,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:52,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292145972] [2024-06-21 20:53:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292145972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:52,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:53:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443815591] [2024-06-21 20:53:52,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:53:52,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:53:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:53:52,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:52,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 256 transitions, 2944 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:52,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:52,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:52,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:53,212 INFO L124 PetriNetUnfolderBase]: 2829/4365 cut-off events. [2024-06-21 20:53:53,212 INFO L125 PetriNetUnfolderBase]: For 310477/310477 co-relation queries the response was YES. [2024-06-21 20:53:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38727 conditions, 4365 events. 2829/4365 cut-off events. For 310477/310477 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23729 event pairs, 548 based on Foata normal form. 24/4388 useless extension candidates. Maximal degree in co-relation 38643. Up to 4020 conditions per place. [2024-06-21 20:53:53,247 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 272 selfloop transitions, 49 changer transitions 0/325 dead transitions. [2024-06-21 20:53:53,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 325 transitions, 4233 flow [2024-06-21 20:53:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:53:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:53:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-21 20:53:53,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:53:53,249 INFO L175 Difference]: Start difference. First operand has 185 places, 256 transitions, 2944 flow. Second operand 11 states and 198 transitions. [2024-06-21 20:53:53,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 325 transitions, 4233 flow [2024-06-21 20:53:53,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 325 transitions, 4035 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 20:53:53,576 INFO L231 Difference]: Finished difference. Result has 197 places, 285 transitions, 3331 flow [2024-06-21 20:53:53,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3331, PETRI_PLACES=197, PETRI_TRANSITIONS=285} [2024-06-21 20:53:53,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 20:53:53,576 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 285 transitions, 3331 flow [2024-06-21 20:53:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:53,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:53,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:53,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:53:53,577 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:53,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash 392532400, now seen corresponding path program 2 times [2024-06-21 20:53:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903224053] [2024-06-21 20:53:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:54,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903224053] [2024-06-21 20:53:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903224053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:54,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:53:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912580371] [2024-06-21 20:53:54,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:54,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:53:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:53:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:53:54,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:54,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 285 transitions, 3331 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:54,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:54,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:54,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:56,001 INFO L124 PetriNetUnfolderBase]: 3196/4940 cut-off events. [2024-06-21 20:53:56,001 INFO L125 PetriNetUnfolderBase]: For 353231/353233 co-relation queries the response was YES. [2024-06-21 20:53:56,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44484 conditions, 4940 events. 3196/4940 cut-off events. For 353231/353233 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27574 event pairs, 577 based on Foata normal form. 26/4965 useless extension candidates. Maximal degree in co-relation 44392. Up to 4383 conditions per place. [2024-06-21 20:53:56,052 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 295 selfloop transitions, 89 changer transitions 0/388 dead transitions. [2024-06-21 20:53:56,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 388 transitions, 5228 flow [2024-06-21 20:53:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:53:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:53:56,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 20:53:56,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-21 20:53:56,055 INFO L175 Difference]: Start difference. First operand has 197 places, 285 transitions, 3331 flow. Second operand 11 states and 207 transitions. [2024-06-21 20:53:56,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 388 transitions, 5228 flow [2024-06-21 20:53:56,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 388 transitions, 5065 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-21 20:53:56,602 INFO L231 Difference]: Finished difference. Result has 211 places, 341 transitions, 4364 flow [2024-06-21 20:53:56,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4364, PETRI_PLACES=211, PETRI_TRANSITIONS=341} [2024-06-21 20:53:56,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 20:53:56,603 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 341 transitions, 4364 flow [2024-06-21 20:53:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:56,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:56,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:56,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:53:56,603 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:56,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash -699572820, now seen corresponding path program 3 times [2024-06-21 20:53:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:56,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064911315] [2024-06-21 20:53:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:53:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:53:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:53:57,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064911315] [2024-06-21 20:53:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064911315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:53:57,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:53:57,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:53:57,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708562080] [2024-06-21 20:53:57,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:53:57,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:53:57,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:53:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:53:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:53:57,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:53:57,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 341 transitions, 4364 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:57,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:53:57,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:53:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:53:59,080 INFO L124 PetriNetUnfolderBase]: 3292/5110 cut-off events. [2024-06-21 20:53:59,081 INFO L125 PetriNetUnfolderBase]: For 367084/367086 co-relation queries the response was YES. [2024-06-21 20:53:59,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46552 conditions, 5110 events. 3292/5110 cut-off events. For 367084/367086 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28858 event pairs, 594 based on Foata normal form. 26/5135 useless extension candidates. Maximal degree in co-relation 46453. Up to 4441 conditions per place. [2024-06-21 20:53:59,142 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 233 selfloop transitions, 150 changer transitions 0/387 dead transitions. [2024-06-21 20:53:59,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 387 transitions, 5534 flow [2024-06-21 20:53:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:53:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:53:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 20:53:59,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-21 20:53:59,144 INFO L175 Difference]: Start difference. First operand has 211 places, 341 transitions, 4364 flow. Second operand 11 states and 208 transitions. [2024-06-21 20:53:59,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 387 transitions, 5534 flow [2024-06-21 20:53:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 387 transitions, 5421 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:53:59,611 INFO L231 Difference]: Finished difference. Result has 219 places, 343 transitions, 4687 flow [2024-06-21 20:53:59,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4687, PETRI_PLACES=219, PETRI_TRANSITIONS=343} [2024-06-21 20:53:59,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-21 20:53:59,612 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 343 transitions, 4687 flow [2024-06-21 20:53:59,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:53:59,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:53:59,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:53:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:53:59,612 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:53:59,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:53:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash -699565380, now seen corresponding path program 4 times [2024-06-21 20:53:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:53:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013613051] [2024-06-21 20:53:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:53:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:53:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:00,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013613051] [2024-06-21 20:54:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013613051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:00,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:00,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:00,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778087757] [2024-06-21 20:54:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:00,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:00,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 343 transitions, 4687 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:00,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:00,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:02,039 INFO L124 PetriNetUnfolderBase]: 3628/5686 cut-off events. [2024-06-21 20:54:02,039 INFO L125 PetriNetUnfolderBase]: For 427030/427032 co-relation queries the response was YES. [2024-06-21 20:54:02,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53755 conditions, 5686 events. 3628/5686 cut-off events. For 427030/427032 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33175 event pairs, 662 based on Foata normal form. 20/5705 useless extension candidates. Maximal degree in co-relation 53655. Up to 4173 conditions per place. [2024-06-21 20:54:02,228 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 234 selfloop transitions, 162 changer transitions 0/400 dead transitions. [2024-06-21 20:54:02,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 400 transitions, 6371 flow [2024-06-21 20:54:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 20:54:02,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700665188470067 [2024-06-21 20:54:02,229 INFO L175 Difference]: Start difference. First operand has 219 places, 343 transitions, 4687 flow. Second operand 11 states and 212 transitions. [2024-06-21 20:54:02,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 400 transitions, 6371 flow [2024-06-21 20:54:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 400 transitions, 6017 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 20:54:02,867 INFO L231 Difference]: Finished difference. Result has 222 places, 351 transitions, 5094 flow [2024-06-21 20:54:02,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4333, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5094, PETRI_PLACES=222, PETRI_TRANSITIONS=351} [2024-06-21 20:54:02,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 20:54:02,867 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 351 transitions, 5094 flow [2024-06-21 20:54:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:02,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:02,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:02,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:54:02,868 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)] === [2024-06-21 20:54:02,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1090879099, now seen corresponding path program 1 times [2024-06-21 20:54:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:02,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520926059] [2024-06-21 20:54:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:03,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520926059] [2024-06-21 20:54:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520926059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:03,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:03,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212418220] [2024-06-21 20:54:03,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:03,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:03,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:03,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:03,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 351 transitions, 5094 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:03,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:03,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:03,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:04,904 INFO L124 PetriNetUnfolderBase]: 3638/5698 cut-off events. [2024-06-21 20:54:04,904 INFO L125 PetriNetUnfolderBase]: For 415589/415589 co-relation queries the response was YES. [2024-06-21 20:54:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54278 conditions, 5698 events. 3638/5698 cut-off events. For 415589/415589 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33256 event pairs, 705 based on Foata normal form. 2/5699 useless extension candidates. Maximal degree in co-relation 54176. Up to 5439 conditions per place. [2024-06-21 20:54:04,962 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 56 changer transitions 0/378 dead transitions. [2024-06-21 20:54:04,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 378 transitions, 6141 flow [2024-06-21 20:54:04,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:54:04,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 20:54:04,964 INFO L175 Difference]: Start difference. First operand has 222 places, 351 transitions, 5094 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:54:04,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 378 transitions, 6141 flow [2024-06-21 20:54:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 378 transitions, 5847 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:05,742 INFO L231 Difference]: Finished difference. Result has 223 places, 360 transitions, 5060 flow [2024-06-21 20:54:05,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5060, PETRI_PLACES=223, PETRI_TRANSITIONS=360} [2024-06-21 20:54:05,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 20:54:05,743 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 360 transitions, 5060 flow [2024-06-21 20:54:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:05,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:05,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:05,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:54:05,744 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:05,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1999982000, now seen corresponding path program 5 times [2024-06-21 20:54:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:05,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69229361] [2024-06-21 20:54:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:06,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:06,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69229361] [2024-06-21 20:54:06,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69229361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:06,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:06,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:54:06,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092577530] [2024-06-21 20:54:06,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:54:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:54:06,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:54:06,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:06,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 360 transitions, 5060 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:54:06,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:06,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:06,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:07,956 INFO L124 PetriNetUnfolderBase]: 3641/5708 cut-off events. [2024-06-21 20:54:07,956 INFO L125 PetriNetUnfolderBase]: For 420261/420265 co-relation queries the response was YES. [2024-06-21 20:54:07,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54121 conditions, 5708 events. 3641/5708 cut-off events. For 420261/420265 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33388 event pairs, 754 based on Foata normal form. 10/5717 useless extension candidates. Maximal degree in co-relation 54016. Up to 5152 conditions per place. [2024-06-21 20:54:08,020 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 321 selfloop transitions, 78 changer transitions 0/403 dead transitions. [2024-06-21 20:54:08,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 403 transitions, 6736 flow [2024-06-21 20:54:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:54:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:54:08,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 20:54:08,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 20:54:08,022 INFO L175 Difference]: Start difference. First operand has 223 places, 360 transitions, 5060 flow. Second operand 9 states and 172 transitions. [2024-06-21 20:54:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 403 transitions, 6736 flow [2024-06-21 20:54:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 403 transitions, 6652 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:54:08,709 INFO L231 Difference]: Finished difference. Result has 230 places, 368 transitions, 5475 flow [2024-06-21 20:54:08,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5475, PETRI_PLACES=230, PETRI_TRANSITIONS=368} [2024-06-21 20:54:08,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 20:54:08,710 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 368 transitions, 5475 flow [2024-06-21 20:54:08,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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) [2024-06-21 20:54:08,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:08,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:08,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:54:08,711 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:08,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:08,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2005707452, now seen corresponding path program 5 times [2024-06-21 20:54:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:08,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124453093] [2024-06-21 20:54:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:08,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:09,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:09,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124453093] [2024-06-21 20:54:09,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124453093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:09,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:09,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466583189] [2024-06-21 20:54:09,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:09,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:09,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 368 transitions, 5475 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:09,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:09,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:09,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:11,313 INFO L124 PetriNetUnfolderBase]: 3909/6154 cut-off events. [2024-06-21 20:54:11,313 INFO L125 PetriNetUnfolderBase]: For 510609/510609 co-relation queries the response was YES. [2024-06-21 20:54:11,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61101 conditions, 6154 events. 3909/6154 cut-off events. For 510609/510609 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36728 event pairs, 769 based on Foata normal form. 18/6171 useless extension candidates. Maximal degree in co-relation 60993. Up to 5041 conditions per place. [2024-06-21 20:54:11,388 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 264 selfloop transitions, 147 changer transitions 0/415 dead transitions. [2024-06-21 20:54:11,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 7233 flow [2024-06-21 20:54:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 20:54:11,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-21 20:54:11,390 INFO L175 Difference]: Start difference. First operand has 230 places, 368 transitions, 5475 flow. Second operand 11 states and 207 transitions. [2024-06-21 20:54:11,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 7233 flow [2024-06-21 20:54:12,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 415 transitions, 6964 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:12,250 INFO L231 Difference]: Finished difference. Result has 237 places, 374 transitions, 5867 flow [2024-06-21 20:54:12,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5867, PETRI_PLACES=237, PETRI_TRANSITIONS=374} [2024-06-21 20:54:12,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 20:54:12,251 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 374 transitions, 5867 flow [2024-06-21 20:54:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:12,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:12,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:54:12,251 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:12,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2005700012, now seen corresponding path program 6 times [2024-06-21 20:54:12,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:12,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297195060] [2024-06-21 20:54:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:13,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297195060] [2024-06-21 20:54:13,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297195060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:13,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:13,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882209900] [2024-06-21 20:54:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:13,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:13,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 374 transitions, 5867 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:13,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:13,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:14,887 INFO L124 PetriNetUnfolderBase]: 3873/6112 cut-off events. [2024-06-21 20:54:14,887 INFO L125 PetriNetUnfolderBase]: For 504413/504413 co-relation queries the response was YES. [2024-06-21 20:54:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59819 conditions, 6112 events. 3873/6112 cut-off events. For 504413/504413 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 36570 event pairs, 782 based on Foata normal form. 24/6135 useless extension candidates. Maximal degree in co-relation 59708. Up to 5313 conditions per place. [2024-06-21 20:54:14,953 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 266 selfloop transitions, 140 changer transitions 0/410 dead transitions. [2024-06-21 20:54:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 410 transitions, 7047 flow [2024-06-21 20:54:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:54:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:54:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 20:54:14,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 20:54:14,954 INFO L175 Difference]: Start difference. First operand has 237 places, 374 transitions, 5867 flow. Second operand 10 states and 191 transitions. [2024-06-21 20:54:14,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 410 transitions, 7047 flow [2024-06-21 20:54:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 410 transitions, 6707 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:15,845 INFO L231 Difference]: Finished difference. Result has 240 places, 374 transitions, 5815 flow [2024-06-21 20:54:15,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5815, PETRI_PLACES=240, PETRI_TRANSITIONS=374} [2024-06-21 20:54:15,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 20:54:15,846 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 374 transitions, 5815 flow [2024-06-21 20:54:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:15,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:15,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:15,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:54:15,846 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:15,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:15,847 INFO L85 PathProgramCache]: Analyzing trace with hash 219053316, now seen corresponding path program 7 times [2024-06-21 20:54:15,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:15,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693523418] [2024-06-21 20:54:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:15,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:16,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693523418] [2024-06-21 20:54:16,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693523418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:16,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879136614] [2024-06-21 20:54:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:17,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:17,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 374 transitions, 5815 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:17,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:17,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:17,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:18,736 INFO L124 PetriNetUnfolderBase]: 4102/6499 cut-off events. [2024-06-21 20:54:18,736 INFO L125 PetriNetUnfolderBase]: For 541319/541323 co-relation queries the response was YES. [2024-06-21 20:54:18,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64474 conditions, 6499 events. 4102/6499 cut-off events. For 541319/541323 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 39488 event pairs, 715 based on Foata normal form. 22/6520 useless extension candidates. Maximal degree in co-relation 64361. Up to 3736 conditions per place. [2024-06-21 20:54:18,818 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 173 selfloop transitions, 251 changer transitions 0/428 dead transitions. [2024-06-21 20:54:18,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 428 transitions, 7543 flow [2024-06-21 20:54:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:54:18,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745011086474501 [2024-06-21 20:54:18,819 INFO L175 Difference]: Start difference. First operand has 240 places, 374 transitions, 5815 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:54:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 428 transitions, 7543 flow [2024-06-21 20:54:19,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 428 transitions, 7263 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:19,662 INFO L231 Difference]: Finished difference. Result has 244 places, 380 transitions, 6462 flow [2024-06-21 20:54:19,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6462, PETRI_PLACES=244, PETRI_TRANSITIONS=380} [2024-06-21 20:54:19,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 20:54:19,663 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 380 transitions, 6462 flow [2024-06-21 20:54:19,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:19,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:19,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:19,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:54:19,663 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:19,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 209849106, now seen corresponding path program 8 times [2024-06-21 20:54:19,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:19,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303050768] [2024-06-21 20:54:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:19,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:20,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:20,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303050768] [2024-06-21 20:54:20,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303050768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:20,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:20,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843879577] [2024-06-21 20:54:20,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:20,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:20,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:20,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:20,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:20,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:20,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 380 transitions, 6462 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:20,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:20,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:20,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:22,349 INFO L124 PetriNetUnfolderBase]: 4188/6639 cut-off events. [2024-06-21 20:54:22,350 INFO L125 PetriNetUnfolderBase]: For 588102/588102 co-relation queries the response was YES. [2024-06-21 20:54:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68062 conditions, 6639 events. 4188/6639 cut-off events. For 588102/588102 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 40745 event pairs, 870 based on Foata normal form. 24/6662 useless extension candidates. Maximal degree in co-relation 67947. Up to 5674 conditions per place. [2024-06-21 20:54:22,429 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 199 selfloop transitions, 214 changer transitions 0/417 dead transitions. [2024-06-21 20:54:22,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 417 transitions, 7700 flow [2024-06-21 20:54:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:54:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:54:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 20:54:22,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:54:22,431 INFO L175 Difference]: Start difference. First operand has 244 places, 380 transitions, 6462 flow. Second operand 10 states and 190 transitions. [2024-06-21 20:54:22,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 417 transitions, 7700 flow [2024-06-21 20:54:23,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 417 transitions, 7286 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 20:54:23,409 INFO L231 Difference]: Finished difference. Result has 247 places, 382 transitions, 6634 flow [2024-06-21 20:54:23,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6634, PETRI_PLACES=247, PETRI_TRANSITIONS=382} [2024-06-21 20:54:23,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 20:54:23,410 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 382 transitions, 6634 flow [2024-06-21 20:54:23,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:23,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:23,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:54:23,411 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:23,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 480701070, now seen corresponding path program 9 times [2024-06-21 20:54:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182975441] [2024-06-21 20:54:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182975441] [2024-06-21 20:54:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182975441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:24,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:24,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113753598] [2024-06-21 20:54:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:24,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:24,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 382 transitions, 6634 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:24,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:24,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:24,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:26,158 INFO L124 PetriNetUnfolderBase]: 4236/6737 cut-off events. [2024-06-21 20:54:26,159 INFO L125 PetriNetUnfolderBase]: For 595556/595556 co-relation queries the response was YES. [2024-06-21 20:54:26,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68869 conditions, 6737 events. 4236/6737 cut-off events. For 595556/595556 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41774 event pairs, 882 based on Foata normal form. 24/6760 useless extension candidates. Maximal degree in co-relation 68752. Up to 5946 conditions per place. [2024-06-21 20:54:26,249 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 257 selfloop transitions, 158 changer transitions 0/419 dead transitions. [2024-06-21 20:54:26,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 419 transitions, 7872 flow [2024-06-21 20:54:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:54:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:54:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 20:54:26,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 20:54:26,250 INFO L175 Difference]: Start difference. First operand has 247 places, 382 transitions, 6634 flow. Second operand 10 states and 190 transitions. [2024-06-21 20:54:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 419 transitions, 7872 flow [2024-06-21 20:54:27,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 419 transitions, 7384 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:27,554 INFO L231 Difference]: Finished difference. Result has 249 places, 384 transitions, 6614 flow [2024-06-21 20:54:27,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6614, PETRI_PLACES=249, PETRI_TRANSITIONS=384} [2024-06-21 20:54:27,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 20:54:27,555 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 384 transitions, 6614 flow [2024-06-21 20:54:27,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:27,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:27,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:27,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:54:27,555 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:27,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash 480708510, now seen corresponding path program 10 times [2024-06-21 20:54:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:27,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947833694] [2024-06-21 20:54:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:28,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947833694] [2024-06-21 20:54:28,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947833694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:28,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:28,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740571959] [2024-06-21 20:54:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:28,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:28,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:28,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 384 transitions, 6614 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:28,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:28,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:28,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:30,363 INFO L124 PetriNetUnfolderBase]: 4297/6852 cut-off events. [2024-06-21 20:54:30,363 INFO L125 PetriNetUnfolderBase]: For 596426/596426 co-relation queries the response was YES. [2024-06-21 20:54:30,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69730 conditions, 6852 events. 4297/6852 cut-off events. For 596426/596426 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 42737 event pairs, 887 based on Foata normal form. 18/6869 useless extension candidates. Maximal degree in co-relation 69612. Up to 5808 conditions per place. [2024-06-21 20:54:30,449 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 255 selfloop transitions, 165 changer transitions 0/424 dead transitions. [2024-06-21 20:54:30,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 424 transitions, 7906 flow [2024-06-21 20:54:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 20:54:30,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-21 20:54:30,450 INFO L175 Difference]: Start difference. First operand has 249 places, 384 transitions, 6614 flow. Second operand 11 states and 204 transitions. [2024-06-21 20:54:30,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 424 transitions, 7906 flow [2024-06-21 20:54:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 424 transitions, 7526 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:31,608 INFO L231 Difference]: Finished difference. Result has 252 places, 386 transitions, 6719 flow [2024-06-21 20:54:31,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6719, PETRI_PLACES=252, PETRI_TRANSITIONS=386} [2024-06-21 20:54:31,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 20:54:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 386 transitions, 6719 flow [2024-06-21 20:54:31,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:31,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:31,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:31,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:54:31,609 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:31,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 737209020, now seen corresponding path program 11 times [2024-06-21 20:54:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100845865] [2024-06-21 20:54:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:32,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100845865] [2024-06-21 20:54:32,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100845865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:32,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:32,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248624631] [2024-06-21 20:54:32,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:32,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:32,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 386 transitions, 6719 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:34,455 INFO L124 PetriNetUnfolderBase]: 4264/6807 cut-off events. [2024-06-21 20:54:34,455 INFO L125 PetriNetUnfolderBase]: For 575123/575127 co-relation queries the response was YES. [2024-06-21 20:54:34,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67971 conditions, 6807 events. 4264/6807 cut-off events. For 575123/575127 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42523 event pairs, 853 based on Foata normal form. 22/6828 useless extension candidates. Maximal degree in co-relation 67852. Up to 5693 conditions per place. [2024-06-21 20:54:34,542 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 202 selfloop transitions, 225 changer transitions 0/431 dead transitions. [2024-06-21 20:54:34,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 431 transitions, 7907 flow [2024-06-21 20:54:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 20:54:34,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700665188470067 [2024-06-21 20:54:34,543 INFO L175 Difference]: Start difference. First operand has 252 places, 386 transitions, 6719 flow. Second operand 11 states and 212 transitions. [2024-06-21 20:54:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 431 transitions, 7907 flow [2024-06-21 20:54:35,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 431 transitions, 7502 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 20:54:35,816 INFO L231 Difference]: Finished difference. Result has 255 places, 386 transitions, 6771 flow [2024-06-21 20:54:35,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6771, PETRI_PLACES=255, PETRI_TRANSITIONS=386} [2024-06-21 20:54:35,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-21 20:54:35,817 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 386 transitions, 6771 flow [2024-06-21 20:54:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:35,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:35,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:35,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:54:35,817 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)] === [2024-06-21 20:54:35,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 559289605, now seen corresponding path program 2 times [2024-06-21 20:54:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:35,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530976572] [2024-06-21 20:54:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:35,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530976572] [2024-06-21 20:54:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530976572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:36,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:36,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403358875] [2024-06-21 20:54:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:36,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:36,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 386 transitions, 6771 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:36,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:36,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:36,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:38,106 INFO L124 PetriNetUnfolderBase]: 4274/6817 cut-off events. [2024-06-21 20:54:38,107 INFO L125 PetriNetUnfolderBase]: For 559015/559015 co-relation queries the response was YES. [2024-06-21 20:54:38,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68109 conditions, 6817 events. 4274/6817 cut-off events. For 559015/559015 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42462 event pairs, 882 based on Foata normal form. 2/6818 useless extension candidates. Maximal degree in co-relation 67989. Up to 6503 conditions per place. [2024-06-21 20:54:38,193 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 337 selfloop transitions, 60 changer transitions 0/401 dead transitions. [2024-06-21 20:54:38,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 401 transitions, 7785 flow [2024-06-21 20:54:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 20:54:38,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 20:54:38,194 INFO L175 Difference]: Start difference. First operand has 255 places, 386 transitions, 6771 flow. Second operand 7 states and 121 transitions. [2024-06-21 20:54:38,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 401 transitions, 7785 flow [2024-06-21 20:54:39,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 401 transitions, 6980 flow, removed 49 selfloop flow, removed 12 redundant places. [2024-06-21 20:54:39,934 INFO L231 Difference]: Finished difference. Result has 250 places, 389 transitions, 6146 flow [2024-06-21 20:54:39,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5966, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6146, PETRI_PLACES=250, PETRI_TRANSITIONS=389} [2024-06-21 20:54:39,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-21 20:54:39,935 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 389 transitions, 6146 flow [2024-06-21 20:54:39,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:39,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:39,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:54:39,936 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)] === [2024-06-21 20:54:39,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1752594569, now seen corresponding path program 3 times [2024-06-21 20:54:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:39,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821476668] [2024-06-21 20:54:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:40,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:40,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821476668] [2024-06-21 20:54:40,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821476668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:40,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:40,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:40,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765454798] [2024-06-21 20:54:40,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:40,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:40,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:40,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:40,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:40,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 389 transitions, 6146 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:40,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:40,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:40,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:42,114 INFO L124 PetriNetUnfolderBase]: 4268/6809 cut-off events. [2024-06-21 20:54:42,114 INFO L125 PetriNetUnfolderBase]: For 547902/547902 co-relation queries the response was YES. [2024-06-21 20:54:42,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65391 conditions, 6809 events. 4268/6809 cut-off events. For 547902/547902 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42437 event pairs, 882 based on Foata normal form. 2/6810 useless extension candidates. Maximal degree in co-relation 65273. Up to 6498 conditions per place. [2024-06-21 20:54:42,193 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 346 selfloop transitions, 52 changer transitions 0/402 dead transitions. [2024-06-21 20:54:42,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 402 transitions, 7022 flow [2024-06-21 20:54:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 20:54:42,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 20:54:42,194 INFO L175 Difference]: Start difference. First operand has 250 places, 389 transitions, 6146 flow. Second operand 7 states and 121 transitions. [2024-06-21 20:54:42,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 402 transitions, 7022 flow [2024-06-21 20:54:43,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 402 transitions, 6809 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:43,464 INFO L231 Difference]: Finished difference. Result has 252 places, 389 transitions, 6045 flow [2024-06-21 20:54:43,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6045, PETRI_PLACES=252, PETRI_TRANSITIONS=389} [2024-06-21 20:54:43,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 20:54:43,465 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 389 transitions, 6045 flow [2024-06-21 20:54:43,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:43,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:43,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:54:43,466 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:43,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash -746733280, now seen corresponding path program 12 times [2024-06-21 20:54:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:43,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710217001] [2024-06-21 20:54:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710217001] [2024-06-21 20:54:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710217001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414118290] [2024-06-21 20:54:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:44,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:44,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:44,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 389 transitions, 6045 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:44,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:44,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:44,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:46,389 INFO L124 PetriNetUnfolderBase]: 4498/7168 cut-off events. [2024-06-21 20:54:46,389 INFO L125 PetriNetUnfolderBase]: For 584386/584388 co-relation queries the response was YES. [2024-06-21 20:54:46,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67879 conditions, 7168 events. 4498/7168 cut-off events. For 584386/584388 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45036 event pairs, 871 based on Foata normal form. 26/7193 useless extension candidates. Maximal degree in co-relation 67761. Up to 6448 conditions per place. [2024-06-21 20:54:46,470 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 358 selfloop transitions, 111 changer transitions 0/473 dead transitions. [2024-06-21 20:54:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 473 transitions, 7945 flow [2024-06-21 20:54:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:54:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:54:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 20:54:46,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-21 20:54:46,471 INFO L175 Difference]: Start difference. First operand has 252 places, 389 transitions, 6045 flow. Second operand 11 states and 206 transitions. [2024-06-21 20:54:46,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 473 transitions, 7945 flow [2024-06-21 20:54:47,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 473 transitions, 7789 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:47,667 INFO L231 Difference]: Finished difference. Result has 262 places, 428 transitions, 6933 flow [2024-06-21 20:54:47,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5903, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6933, PETRI_PLACES=262, PETRI_TRANSITIONS=428} [2024-06-21 20:54:47,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-21 20:54:47,668 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 428 transitions, 6933 flow [2024-06-21 20:54:47,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:47,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:47,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:54:47,668 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)] === [2024-06-21 20:54:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1575647561, now seen corresponding path program 1 times [2024-06-21 20:54:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657738336] [2024-06-21 20:54:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:48,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:48,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657738336] [2024-06-21 20:54:48,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657738336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:48,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:48,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442176234] [2024-06-21 20:54:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:48,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:48,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 428 transitions, 6933 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:48,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:48,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:48,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:49,868 INFO L124 PetriNetUnfolderBase]: 4397/7084 cut-off events. [2024-06-21 20:54:49,868 INFO L125 PetriNetUnfolderBase]: For 511447/511447 co-relation queries the response was YES. [2024-06-21 20:54:49,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66948 conditions, 7084 events. 4397/7084 cut-off events. For 511447/511447 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45403 event pairs, 1059 based on Foata normal form. 4/7082 useless extension candidates. Maximal degree in co-relation 66825. Up to 6738 conditions per place. [2024-06-21 20:54:49,958 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 416 selfloop transitions, 29 changer transitions 0/454 dead transitions. [2024-06-21 20:54:49,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 454 transitions, 8135 flow [2024-06-21 20:54:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 20:54:49,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-21 20:54:49,959 INFO L175 Difference]: Start difference. First operand has 262 places, 428 transitions, 6933 flow. Second operand 7 states and 132 transitions. [2024-06-21 20:54:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 454 transitions, 8135 flow [2024-06-21 20:54:51,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 454 transitions, 7852 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 20:54:51,070 INFO L231 Difference]: Finished difference. Result has 261 places, 438 transitions, 6856 flow [2024-06-21 20:54:51,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6856, PETRI_PLACES=261, PETRI_TRANSITIONS=438} [2024-06-21 20:54:51,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 20:54:51,071 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 438 transitions, 6856 flow [2024-06-21 20:54:51,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:51,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:51,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:54:51,071 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)] === [2024-06-21 20:54:51,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:51,071 INFO L85 PathProgramCache]: Analyzing trace with hash 559295557, now seen corresponding path program 2 times [2024-06-21 20:54:51,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:51,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761896566] [2024-06-21 20:54:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:51,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761896566] [2024-06-21 20:54:51,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761896566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:51,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:51,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:54:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307207894] [2024-06-21 20:54:51,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:51,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:54:51,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:54:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:54:51,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 438 transitions, 6856 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:51,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:51,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:53,321 INFO L124 PetriNetUnfolderBase]: 4407/7100 cut-off events. [2024-06-21 20:54:53,321 INFO L125 PetriNetUnfolderBase]: For 518368/518368 co-relation queries the response was YES. [2024-06-21 20:54:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67133 conditions, 7100 events. 4407/7100 cut-off events. For 518368/518368 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45437 event pairs, 1061 based on Foata normal form. 3/7099 useless extension candidates. Maximal degree in co-relation 67009. Up to 6824 conditions per place. [2024-06-21 20:54:53,412 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 17 changer transitions 0/451 dead transitions. [2024-06-21 20:54:53,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 451 transitions, 7824 flow [2024-06-21 20:54:53,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 20:54:53,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 20:54:53,414 INFO L175 Difference]: Start difference. First operand has 261 places, 438 transitions, 6856 flow. Second operand 7 states and 120 transitions. [2024-06-21 20:54:53,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 451 transitions, 7824 flow [2024-06-21 20:54:54,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 451 transitions, 7746 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 20:54:54,703 INFO L231 Difference]: Finished difference. Result has 266 places, 441 transitions, 6879 flow [2024-06-21 20:54:54,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6879, PETRI_PLACES=266, PETRI_TRANSITIONS=441} [2024-06-21 20:54:54,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 20:54:54,703 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 441 transitions, 6879 flow [2024-06-21 20:54:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:54,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:54,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:54,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:54:54,704 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)] === [2024-06-21 20:54:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1752779081, now seen corresponding path program 3 times [2024-06-21 20:54:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616624121] [2024-06-21 20:54:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:55,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:55,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616624121] [2024-06-21 20:54:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616624121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:55,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:55,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:54:55,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132496564] [2024-06-21 20:54:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:54:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:54:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:54:55,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:54:55,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 441 transitions, 6879 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:55,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:55,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:54:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:54:56,745 INFO L124 PetriNetUnfolderBase]: 4405/7095 cut-off events. [2024-06-21 20:54:56,745 INFO L125 PetriNetUnfolderBase]: For 523597/523597 co-relation queries the response was YES. [2024-06-21 20:54:56,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67148 conditions, 7095 events. 4405/7095 cut-off events. For 523597/523597 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45456 event pairs, 1058 based on Foata normal form. 2/7091 useless extension candidates. Maximal degree in co-relation 67021. Up to 6813 conditions per place. [2024-06-21 20:54:56,837 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 22 changer transitions 0/455 dead transitions. [2024-06-21 20:54:56,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 455 transitions, 7865 flow [2024-06-21 20:54:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:54:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:54:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 20:54:56,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:54:56,838 INFO L175 Difference]: Start difference. First operand has 266 places, 441 transitions, 6879 flow. Second operand 7 states and 123 transitions. [2024-06-21 20:54:56,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 455 transitions, 7865 flow [2024-06-21 20:54:58,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 455 transitions, 7787 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:54:58,194 INFO L231 Difference]: Finished difference. Result has 268 places, 444 transitions, 6917 flow [2024-06-21 20:54:58,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6917, PETRI_PLACES=268, PETRI_TRANSITIONS=444} [2024-06-21 20:54:58,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 20:54:58,195 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 444 transitions, 6917 flow [2024-06-21 20:54:58,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:58,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:54:58,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:54:58,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:54:58,196 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:54:58,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:54:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash 485156801, now seen corresponding path program 1 times [2024-06-21 20:54:58,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:54:58,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013542718] [2024-06-21 20:54:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:54:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:54:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:54:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:54:59,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:54:59,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013542718] [2024-06-21 20:54:59,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013542718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:54:59,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:54:59,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:54:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219459079] [2024-06-21 20:54:59,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:54:59,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:54:59,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:54:59,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:54:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:54:59,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:54:59,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 444 transitions, 6917 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:54:59,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:54:59,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:54:59,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:01,263 INFO L124 PetriNetUnfolderBase]: 4618/7360 cut-off events. [2024-06-21 20:55:01,263 INFO L125 PetriNetUnfolderBase]: For 639242/639244 co-relation queries the response was YES. [2024-06-21 20:55:01,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71207 conditions, 7360 events. 4618/7360 cut-off events. For 639242/639244 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46586 event pairs, 879 based on Foata normal form. 20/7379 useless extension candidates. Maximal degree in co-relation 71080. Up to 6589 conditions per place. [2024-06-21 20:55:01,354 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 369 selfloop transitions, 114 changer transitions 0/487 dead transitions. [2024-06-21 20:55:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 487 transitions, 8431 flow [2024-06-21 20:55:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:55:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 20:55:01,356 INFO L175 Difference]: Start difference. First operand has 268 places, 444 transitions, 6917 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:55:01,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 487 transitions, 8431 flow [2024-06-21 20:55:02,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 487 transitions, 8341 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:02,582 INFO L231 Difference]: Finished difference. Result has 273 places, 446 transitions, 7202 flow [2024-06-21 20:55:02,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7202, PETRI_PLACES=273, PETRI_TRANSITIONS=446} [2024-06-21 20:55:02,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-21 20:55:02,583 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 446 transitions, 7202 flow [2024-06-21 20:55:02,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:02,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:02,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:55:02,583 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:02,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 489740771, now seen corresponding path program 2 times [2024-06-21 20:55:02,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:02,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472944903] [2024-06-21 20:55:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:03,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472944903] [2024-06-21 20:55:03,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472944903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:03,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:03,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:03,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079269550] [2024-06-21 20:55:03,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:03,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:03,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:03,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:04,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:04,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 446 transitions, 7202 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:04,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:04,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:04,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:05,744 INFO L124 PetriNetUnfolderBase]: 4686/7476 cut-off events. [2024-06-21 20:55:05,745 INFO L125 PetriNetUnfolderBase]: For 662872/662874 co-relation queries the response was YES. [2024-06-21 20:55:05,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73273 conditions, 7476 events. 4686/7476 cut-off events. For 662872/662874 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 47411 event pairs, 950 based on Foata normal form. 20/7495 useless extension candidates. Maximal degree in co-relation 73145. Up to 6740 conditions per place. [2024-06-21 20:55:05,837 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 354 selfloop transitions, 129 changer transitions 0/487 dead transitions. [2024-06-21 20:55:05,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 487 transitions, 8590 flow [2024-06-21 20:55:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 20:55:05,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 20:55:05,839 INFO L175 Difference]: Start difference. First operand has 273 places, 446 transitions, 7202 flow. Second operand 10 states and 187 transitions. [2024-06-21 20:55:05,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 487 transitions, 8590 flow [2024-06-21 20:55:06,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 487 transitions, 8307 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:06,994 INFO L231 Difference]: Finished difference. Result has 276 places, 448 transitions, 7330 flow [2024-06-21 20:55:06,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6919, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7330, PETRI_PLACES=276, PETRI_TRANSITIONS=448} [2024-06-21 20:55:06,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 20:55:06,995 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 448 transitions, 7330 flow [2024-06-21 20:55:06,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:06,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:06,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:55:06,995 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:06,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash -768952379, now seen corresponding path program 3 times [2024-06-21 20:55:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:06,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135031004] [2024-06-21 20:55:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135031004] [2024-06-21 20:55:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135031004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:08,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:08,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:08,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036462160] [2024-06-21 20:55:08,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:08,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:08,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:08,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:08,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:08,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:08,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 448 transitions, 7330 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:08,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:08,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:08,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:10,296 INFO L124 PetriNetUnfolderBase]: 4754/7592 cut-off events. [2024-06-21 20:55:10,296 INFO L125 PetriNetUnfolderBase]: For 680226/680228 co-relation queries the response was YES. [2024-06-21 20:55:10,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74644 conditions, 7592 events. 4754/7592 cut-off events. For 680226/680228 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48095 event pairs, 904 based on Foata normal form. 20/7611 useless extension candidates. Maximal degree in co-relation 74515. Up to 7045 conditions per place. [2024-06-21 20:55:10,394 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 416 selfloop transitions, 72 changer transitions 0/492 dead transitions. [2024-06-21 20:55:10,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 492 transitions, 8872 flow [2024-06-21 20:55:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 20:55:10,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 20:55:10,397 INFO L175 Difference]: Start difference. First operand has 276 places, 448 transitions, 7330 flow. Second operand 10 states and 188 transitions. [2024-06-21 20:55:10,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 492 transitions, 8872 flow [2024-06-21 20:55:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 492 transitions, 8507 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 20:55:12,121 INFO L231 Difference]: Finished difference. Result has 278 places, 450 transitions, 7264 flow [2024-06-21 20:55:12,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7264, PETRI_PLACES=278, PETRI_TRANSITIONS=450} [2024-06-21 20:55:12,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-21 20:55:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 450 transitions, 7264 flow [2024-06-21 20:55:12,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:12,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:12,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:55:12,122 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:12,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 733556089, now seen corresponding path program 4 times [2024-06-21 20:55:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:12,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092364574] [2024-06-21 20:55:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:13,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:13,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092364574] [2024-06-21 20:55:13,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092364574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:13,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:13,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219405597] [2024-06-21 20:55:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:13,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 450 transitions, 7264 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:13,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:13,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:15,114 INFO L124 PetriNetUnfolderBase]: 4822/7706 cut-off events. [2024-06-21 20:55:15,114 INFO L125 PetriNetUnfolderBase]: For 701724/701726 co-relation queries the response was YES. [2024-06-21 20:55:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75417 conditions, 7706 events. 4822/7706 cut-off events. For 701724/701726 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49337 event pairs, 1036 based on Foata normal form. 20/7725 useless extension candidates. Maximal degree in co-relation 75287. Up to 7174 conditions per place. [2024-06-21 20:55:15,207 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 436 selfloop transitions, 53 changer transitions 0/493 dead transitions. [2024-06-21 20:55:15,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 493 transitions, 8975 flow [2024-06-21 20:55:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 20:55:15,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 20:55:15,208 INFO L175 Difference]: Start difference. First operand has 278 places, 450 transitions, 7264 flow. Second operand 10 states and 188 transitions. [2024-06-21 20:55:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 493 transitions, 8975 flow [2024-06-21 20:55:16,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 493 transitions, 8766 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:16,787 INFO L231 Difference]: Finished difference. Result has 282 places, 452 transitions, 7320 flow [2024-06-21 20:55:16,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7055, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7320, PETRI_PLACES=282, PETRI_TRANSITIONS=452} [2024-06-21 20:55:16,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 20:55:16,787 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 452 transitions, 7320 flow [2024-06-21 20:55:16,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:16,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:16,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:16,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:55:16,788 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)] === [2024-06-21 20:55:16,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 392884516, now seen corresponding path program 1 times [2024-06-21 20:55:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:16,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349993228] [2024-06-21 20:55:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:16,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:17,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349993228] [2024-06-21 20:55:17,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349993228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:17,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:17,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:17,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282153911] [2024-06-21 20:55:17,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:17,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:17,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:17,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:17,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:17,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 452 transitions, 7320 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:17,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:17,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:19,306 INFO L124 PetriNetUnfolderBase]: 4826/7714 cut-off events. [2024-06-21 20:55:19,306 INFO L125 PetriNetUnfolderBase]: For 674616/674618 co-relation queries the response was YES. [2024-06-21 20:55:19,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75067 conditions, 7714 events. 4826/7714 cut-off events. For 674616/674618 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49368 event pairs, 1085 based on Foata normal form. 6/7719 useless extension candidates. Maximal degree in co-relation 74936. Up to 7395 conditions per place. [2024-06-21 20:55:19,391 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 422 selfloop transitions, 50 changer transitions 0/476 dead transitions. [2024-06-21 20:55:19,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 476 transitions, 8559 flow [2024-06-21 20:55:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 20:55:19,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 20:55:19,392 INFO L175 Difference]: Start difference. First operand has 282 places, 452 transitions, 7320 flow. Second operand 7 states and 130 transitions. [2024-06-21 20:55:19,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 476 transitions, 8559 flow [2024-06-21 20:55:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 476 transitions, 8363 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:20,789 INFO L231 Difference]: Finished difference. Result has 282 places, 457 transitions, 7335 flow [2024-06-21 20:55:20,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7131, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7335, PETRI_PLACES=282, PETRI_TRANSITIONS=457} [2024-06-21 20:55:20,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 20:55:20,790 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 457 transitions, 7335 flow [2024-06-21 20:55:20,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:20,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:20,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:55:20,790 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)] === [2024-06-21 20:55:20,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash 398598436, now seen corresponding path program 2 times [2024-06-21 20:55:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:20,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496382200] [2024-06-21 20:55:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:21,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496382200] [2024-06-21 20:55:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496382200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:21,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:21,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138448059] [2024-06-21 20:55:21,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:21,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:21,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:21,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:21,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 457 transitions, 7335 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:21,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:21,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:21,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:23,244 INFO L124 PetriNetUnfolderBase]: 4836/7730 cut-off events. [2024-06-21 20:55:23,244 INFO L125 PetriNetUnfolderBase]: For 669301/669303 co-relation queries the response was YES. [2024-06-21 20:55:23,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74669 conditions, 7730 events. 4836/7730 cut-off events. For 669301/669303 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49449 event pairs, 1085 based on Foata normal form. 4/7733 useless extension candidates. Maximal degree in co-relation 74537. Up to 7503 conditions per place. [2024-06-21 20:55:23,354 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 34 changer transitions 0/477 dead transitions. [2024-06-21 20:55:23,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 477 transitions, 8451 flow [2024-06-21 20:55:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:55:23,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:55:23,355 INFO L175 Difference]: Start difference. First operand has 282 places, 457 transitions, 7335 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:55:23,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 477 transitions, 8451 flow [2024-06-21 20:55:24,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 477 transitions, 8356 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:25,003 INFO L231 Difference]: Finished difference. Result has 287 places, 464 transitions, 7465 flow [2024-06-21 20:55:25,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7245, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7465, PETRI_PLACES=287, PETRI_TRANSITIONS=464} [2024-06-21 20:55:25,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 20:55:25,003 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 464 transitions, 7465 flow [2024-06-21 20:55:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:25,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:25,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:55:25,004 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)] === [2024-06-21 20:55:25,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 398606372, now seen corresponding path program 1 times [2024-06-21 20:55:25,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:25,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006183904] [2024-06-21 20:55:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:25,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006183904] [2024-06-21 20:55:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006183904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:25,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184033668] [2024-06-21 20:55:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:25,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:25,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:25,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 464 transitions, 7465 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:25,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:25,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:27,602 INFO L124 PetriNetUnfolderBase]: 4856/7758 cut-off events. [2024-06-21 20:55:27,602 INFO L125 PetriNetUnfolderBase]: For 687968/687968 co-relation queries the response was YES. [2024-06-21 20:55:27,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75044 conditions, 7758 events. 4856/7758 cut-off events. For 687968/687968 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49535 event pairs, 969 based on Foata normal form. 4/7761 useless extension candidates. Maximal degree in co-relation 74910. Up to 7379 conditions per place. [2024-06-21 20:55:27,702 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 73 changer transitions 0/491 dead transitions. [2024-06-21 20:55:27,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 491 transitions, 8783 flow [2024-06-21 20:55:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:55:27,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:55:27,703 INFO L175 Difference]: Start difference. First operand has 287 places, 464 transitions, 7465 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:55:27,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 491 transitions, 8783 flow [2024-06-21 20:55:29,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 491 transitions, 8658 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:29,687 INFO L231 Difference]: Finished difference. Result has 289 places, 470 transitions, 7610 flow [2024-06-21 20:55:29,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7610, PETRI_PLACES=289, PETRI_TRANSITIONS=470} [2024-06-21 20:55:29,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 20:55:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 470 transitions, 7610 flow [2024-06-21 20:55:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:29,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:29,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:55:29,689 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:55:29,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1593124163, now seen corresponding path program 5 times [2024-06-21 20:55:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131691563] [2024-06-21 20:55:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:30,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131691563] [2024-06-21 20:55:30,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131691563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:30,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:30,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:55:30,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632446880] [2024-06-21 20:55:30,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:30,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:55:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:55:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:55:30,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:30,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 470 transitions, 7610 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:30,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:30,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:30,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:32,637 INFO L124 PetriNetUnfolderBase]: 4863/7773 cut-off events. [2024-06-21 20:55:32,637 INFO L125 PetriNetUnfolderBase]: For 719601/719607 co-relation queries the response was YES. [2024-06-21 20:55:32,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75409 conditions, 7773 events. 4863/7773 cut-off events. For 719601/719607 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 49816 event pairs, 1038 based on Foata normal form. 24/7796 useless extension candidates. Maximal degree in co-relation 75275. Up to 7047 conditions per place. [2024-06-21 20:55:32,740 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 420 selfloop transitions, 87 changer transitions 0/511 dead transitions. [2024-06-21 20:55:32,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 511 transitions, 9365 flow [2024-06-21 20:55:32,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:55:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:55:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 20:55:32,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 20:55:32,741 INFO L175 Difference]: Start difference. First operand has 289 places, 470 transitions, 7610 flow. Second operand 10 states and 189 transitions. [2024-06-21 20:55:32,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 511 transitions, 9365 flow [2024-06-21 20:55:34,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 511 transitions, 9259 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:34,744 INFO L231 Difference]: Finished difference. Result has 294 places, 470 transitions, 7635 flow [2024-06-21 20:55:34,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7390, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7635, PETRI_PLACES=294, PETRI_TRANSITIONS=470} [2024-06-21 20:55:34,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-21 20:55:34,745 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 470 transitions, 7635 flow [2024-06-21 20:55:34,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:34,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:34,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:55:34,745 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)] === [2024-06-21 20:55:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1588994340, now seen corresponding path program 3 times [2024-06-21 20:55:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212546974] [2024-06-21 20:55:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:34,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:35,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212546974] [2024-06-21 20:55:35,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212546974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:35,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:35,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:35,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397247771] [2024-06-21 20:55:35,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:35,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:35,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:35,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 470 transitions, 7635 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:37,027 INFO L124 PetriNetUnfolderBase]: 4883/7807 cut-off events. [2024-06-21 20:55:37,027 INFO L125 PetriNetUnfolderBase]: For 708330/708336 co-relation queries the response was YES. [2024-06-21 20:55:37,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76181 conditions, 7807 events. 4883/7807 cut-off events. For 708330/708336 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49995 event pairs, 1093 based on Foata normal form. 10/7816 useless extension candidates. Maximal degree in co-relation 76045. Up to 7311 conditions per place. [2024-06-21 20:55:37,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 86 changer transitions 0/495 dead transitions. [2024-06-21 20:55:37,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 495 transitions, 9083 flow [2024-06-21 20:55:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 20:55:37,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 20:55:37,134 INFO L175 Difference]: Start difference. First operand has 294 places, 470 transitions, 7635 flow. Second operand 7 states and 131 transitions. [2024-06-21 20:55:37,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 495 transitions, 9083 flow [2024-06-21 20:55:38,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 495 transitions, 8800 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 20:55:38,862 INFO L231 Difference]: Finished difference. Result has 293 places, 477 transitions, 7660 flow [2024-06-21 20:55:38,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7660, PETRI_PLACES=293, PETRI_TRANSITIONS=477} [2024-06-21 20:55:38,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 20:55:38,863 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 477 transitions, 7660 flow [2024-06-21 20:55:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:38,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:38,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:38,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:55:38,863 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)] === [2024-06-21 20:55:38,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1779060050, now seen corresponding path program 4 times [2024-06-21 20:55:38,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:38,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180147641] [2024-06-21 20:55:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:38,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:39,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180147641] [2024-06-21 20:55:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180147641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:39,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276437569] [2024-06-21 20:55:39,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:39,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:39,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:39,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 477 transitions, 7660 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:39,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:39,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:39,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:41,387 INFO L124 PetriNetUnfolderBase]: 4887/7815 cut-off events. [2024-06-21 20:55:41,387 INFO L125 PetriNetUnfolderBase]: For 701822/701828 co-relation queries the response was YES. [2024-06-21 20:55:41,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75478 conditions, 7815 events. 4887/7815 cut-off events. For 701822/701828 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 50113 event pairs, 1092 based on Foata normal form. 10/7824 useless extension candidates. Maximal degree in co-relation 75341. Up to 7312 conditions per place. [2024-06-21 20:55:41,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 98 changer transitions 0/498 dead transitions. [2024-06-21 20:55:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 498 transitions, 8950 flow [2024-06-21 20:55:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 20:55:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 20:55:41,486 INFO L175 Difference]: Start difference. First operand has 293 places, 477 transitions, 7660 flow. Second operand 7 states and 127 transitions. [2024-06-21 20:55:41,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 498 transitions, 8950 flow [2024-06-21 20:55:43,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 498 transitions, 8793 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:43,315 INFO L231 Difference]: Finished difference. Result has 296 places, 482 transitions, 7805 flow [2024-06-21 20:55:43,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7506, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7805, PETRI_PLACES=296, PETRI_TRANSITIONS=482} [2024-06-21 20:55:43,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 20:55:43,316 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 482 transitions, 7805 flow [2024-06-21 20:55:43,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:43,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:43,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:43,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:55:43,316 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)] === [2024-06-21 20:55:43,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash 150929478, now seen corresponding path program 5 times [2024-06-21 20:55:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:43,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626988075] [2024-06-21 20:55:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:43,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:43,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:43,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626988075] [2024-06-21 20:55:43,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626988075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:43,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:43,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:43,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684082343] [2024-06-21 20:55:43,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:43,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:43,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:44,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:44,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 482 transitions, 7805 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:44,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:44,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:44,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:45,911 INFO L124 PetriNetUnfolderBase]: 4827/7710 cut-off events. [2024-06-21 20:55:45,911 INFO L125 PetriNetUnfolderBase]: For 701002/701008 co-relation queries the response was YES. [2024-06-21 20:55:45,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74484 conditions, 7710 events. 4827/7710 cut-off events. For 701002/701008 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 49214 event pairs, 1076 based on Foata normal form. 8/7717 useless extension candidates. Maximal degree in co-relation 74346. Up to 7457 conditions per place. [2024-06-21 20:55:46,000 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 45 changer transitions 0/494 dead transitions. [2024-06-21 20:55:46,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 494 transitions, 8977 flow [2024-06-21 20:55:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 20:55:46,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 20:55:46,001 INFO L175 Difference]: Start difference. First operand has 296 places, 482 transitions, 7805 flow. Second operand 7 states and 118 transitions. [2024-06-21 20:55:46,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 494 transitions, 8977 flow [2024-06-21 20:55:47,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 494 transitions, 8800 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:47,885 INFO L231 Difference]: Finished difference. Result has 299 places, 482 transitions, 7726 flow [2024-06-21 20:55:47,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7628, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7726, PETRI_PLACES=299, PETRI_TRANSITIONS=482} [2024-06-21 20:55:47,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 20:55:47,885 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 482 transitions, 7726 flow [2024-06-21 20:55:47,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:47,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:55:47,886 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)] === [2024-06-21 20:55:47,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1006468672, now seen corresponding path program 6 times [2024-06-21 20:55:47,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:47,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316376442] [2024-06-21 20:55:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316376442] [2024-06-21 20:55:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316376442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:48,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354388092] [2024-06-21 20:55:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:48,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:48,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 482 transitions, 7726 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:48,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:48,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:48,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:50,229 INFO L124 PetriNetUnfolderBase]: 4837/7724 cut-off events. [2024-06-21 20:55:50,229 INFO L125 PetriNetUnfolderBase]: For 714812/714818 co-relation queries the response was YES. [2024-06-21 20:55:50,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74598 conditions, 7724 events. 4837/7724 cut-off events. For 714812/714818 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 49300 event pairs, 1076 based on Foata normal form. 8/7731 useless extension candidates. Maximal degree in co-relation 74459. Up to 7493 conditions per place. [2024-06-21 20:55:50,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 458 selfloop transitions, 35 changer transitions 0/497 dead transitions. [2024-06-21 20:55:50,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 497 transitions, 8862 flow [2024-06-21 20:55:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 20:55:50,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 20:55:50,333 INFO L175 Difference]: Start difference. First operand has 299 places, 482 transitions, 7726 flow. Second operand 8 states and 126 transitions. [2024-06-21 20:55:50,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 497 transitions, 8862 flow [2024-06-21 20:55:52,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 497 transitions, 8571 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:55:52,153 INFO L231 Difference]: Finished difference. Result has 299 places, 487 transitions, 7639 flow [2024-06-21 20:55:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7639, PETRI_PLACES=299, PETRI_TRANSITIONS=487} [2024-06-21 20:55:52,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 20:55:52,154 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 487 transitions, 7639 flow [2024-06-21 20:55:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:52,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:52,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:55:52,155 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)] === [2024-06-21 20:55:52,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1019363618, now seen corresponding path program 2 times [2024-06-21 20:55:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424171374] [2024-06-21 20:55:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:52,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:52,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424171374] [2024-06-21 20:55:52,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424171374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:52,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:52,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:55:52,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645892713] [2024-06-21 20:55:52,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:52,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:55:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:55:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:55:53,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:53,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 487 transitions, 7639 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:53,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:53,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:53,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:54,824 INFO L124 PetriNetUnfolderBase]: 4889/7797 cut-off events. [2024-06-21 20:55:54,824 INFO L125 PetriNetUnfolderBase]: For 746046/746046 co-relation queries the response was YES. [2024-06-21 20:55:54,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75448 conditions, 7797 events. 4889/7797 cut-off events. For 746046/746046 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49655 event pairs, 962 based on Foata normal form. 4/7800 useless extension candidates. Maximal degree in co-relation 75309. Up to 7379 conditions per place. [2024-06-21 20:55:54,927 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 427 selfloop transitions, 80 changer transitions 0/511 dead transitions. [2024-06-21 20:55:54,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 511 transitions, 9153 flow [2024-06-21 20:55:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:55:54,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:55:54,928 INFO L175 Difference]: Start difference. First operand has 299 places, 487 transitions, 7639 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:55:54,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 511 transitions, 9153 flow [2024-06-21 20:55:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 511 transitions, 9059 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:56,741 INFO L231 Difference]: Finished difference. Result has 303 places, 493 transitions, 7827 flow [2024-06-21 20:55:56,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7545, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7827, PETRI_PLACES=303, PETRI_TRANSITIONS=493} [2024-06-21 20:55:56,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 20:55:56,742 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 493 transitions, 7827 flow [2024-06-21 20:55:56,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:56,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:56,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:56,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:55:56,742 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)] === [2024-06-21 20:55:56,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1885588868, now seen corresponding path program 3 times [2024-06-21 20:55:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:56,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274998259] [2024-06-21 20:55:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274998259] [2024-06-21 20:55:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274998259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:57,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:57,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651892589] [2024-06-21 20:55:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:57,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:57,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:55:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 493 transitions, 7827 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:57,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:55:57,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:59,431 INFO L124 PetriNetUnfolderBase]: 4877/7783 cut-off events. [2024-06-21 20:55:59,431 INFO L125 PetriNetUnfolderBase]: For 749398/749398 co-relation queries the response was YES. [2024-06-21 20:55:59,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75382 conditions, 7783 events. 4877/7783 cut-off events. For 749398/749398 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49613 event pairs, 954 based on Foata normal form. 4/7786 useless extension candidates. Maximal degree in co-relation 75242. Up to 7371 conditions per place. [2024-06-21 20:55:59,541 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 71 changer transitions 0/511 dead transitions. [2024-06-21 20:55:59,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 511 transitions, 9085 flow [2024-06-21 20:55:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:55:59,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:55:59,542 INFO L175 Difference]: Start difference. First operand has 303 places, 493 transitions, 7827 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:55:59,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 511 transitions, 9085 flow [2024-06-21 20:56:01,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 511 transitions, 8881 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:01,142 INFO L231 Difference]: Finished difference. Result has 307 places, 493 transitions, 7771 flow [2024-06-21 20:56:01,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7771, PETRI_PLACES=307, PETRI_TRANSITIONS=493} [2024-06-21 20:56:01,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 20:56:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 493 transitions, 7771 flow [2024-06-21 20:56:01,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:01,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:01,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:56:01,143 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)] === [2024-06-21 20:56:01,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1019809088, now seen corresponding path program 4 times [2024-06-21 20:56:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:01,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30156443] [2024-06-21 20:56:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:01,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30156443] [2024-06-21 20:56:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30156443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472688227] [2024-06-21 20:56:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:02,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:02,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 493 transitions, 7771 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:02,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:02,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:02,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:03,879 INFO L124 PetriNetUnfolderBase]: 4865/7764 cut-off events. [2024-06-21 20:56:03,880 INFO L125 PetriNetUnfolderBase]: For 750874/750874 co-relation queries the response was YES. [2024-06-21 20:56:03,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74969 conditions, 7764 events. 4865/7764 cut-off events. For 750874/750874 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 49631 event pairs, 1203 based on Foata normal form. 4/7767 useless extension candidates. Maximal degree in co-relation 74828. Up to 7548 conditions per place. [2024-06-21 20:56:03,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 481 selfloop transitions, 20 changer transitions 0/505 dead transitions. [2024-06-21 20:56:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 505 transitions, 8817 flow [2024-06-21 20:56:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 20:56:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 20:56:03,981 INFO L175 Difference]: Start difference. First operand has 307 places, 493 transitions, 7771 flow. Second operand 8 states and 128 transitions. [2024-06-21 20:56:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 505 transitions, 8817 flow [2024-06-21 20:56:05,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 505 transitions, 8567 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 20:56:05,852 INFO L231 Difference]: Finished difference. Result has 307 places, 493 transitions, 7568 flow [2024-06-21 20:56:05,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7568, PETRI_PLACES=307, PETRI_TRANSITIONS=493} [2024-06-21 20:56:05,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 20:56:05,852 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 493 transitions, 7568 flow [2024-06-21 20:56:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:05,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:05,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:05,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:56:05,853 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)] === [2024-06-21 20:56:05,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash -532241274, now seen corresponding path program 7 times [2024-06-21 20:56:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:05,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406150394] [2024-06-21 20:56:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:06,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:06,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406150394] [2024-06-21 20:56:06,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406150394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:06,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:06,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508528131] [2024-06-21 20:56:06,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:06,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:06,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:06,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:06,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:06,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 493 transitions, 7568 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:06,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:06,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:06,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:08,176 INFO L124 PetriNetUnfolderBase]: 4815/7675 cut-off events. [2024-06-21 20:56:08,176 INFO L125 PetriNetUnfolderBase]: For 747058/747060 co-relation queries the response was YES. [2024-06-21 20:56:08,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73742 conditions, 7675 events. 4815/7675 cut-off events. For 747058/747060 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 48872 event pairs, 1055 based on Foata normal form. 4/7678 useless extension candidates. Maximal degree in co-relation 73600. Up to 7440 conditions per place. [2024-06-21 20:56:08,270 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 473 selfloop transitions, 41 changer transitions 0/518 dead transitions. [2024-06-21 20:56:08,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 518 transitions, 8743 flow [2024-06-21 20:56:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 20:56:08,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 20:56:08,271 INFO L175 Difference]: Start difference. First operand has 307 places, 493 transitions, 7568 flow. Second operand 8 states and 138 transitions. [2024-06-21 20:56:08,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 518 transitions, 8743 flow [2024-06-21 20:56:09,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 518 transitions, 8594 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 20:56:09,490 INFO L231 Difference]: Finished difference. Result has 306 places, 499 transitions, 7618 flow [2024-06-21 20:56:09,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7618, PETRI_PLACES=306, PETRI_TRANSITIONS=499} [2024-06-21 20:56:09,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 20:56:09,491 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 499 transitions, 7618 flow [2024-06-21 20:56:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:09,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:09,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:56:09,491 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)] === [2024-06-21 20:56:09,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1596620836, now seen corresponding path program 1 times [2024-06-21 20:56:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112907590] [2024-06-21 20:56:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:10,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:10,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112907590] [2024-06-21 20:56:10,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112907590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:10,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:10,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257184964] [2024-06-21 20:56:10,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:10,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:10,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 499 transitions, 7618 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:10,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:10,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:12,276 INFO L124 PetriNetUnfolderBase]: 4632/7475 cut-off events. [2024-06-21 20:56:12,276 INFO L125 PetriNetUnfolderBase]: For 667446/667454 co-relation queries the response was YES. [2024-06-21 20:56:12,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70474 conditions, 7475 events. 4632/7475 cut-off events. For 667446/667454 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 48449 event pairs, 1127 based on Foata normal form. 1/7460 useless extension candidates. Maximal degree in co-relation 70332. Up to 7159 conditions per place. [2024-06-21 20:56:12,368 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 27 changer transitions 0/518 dead transitions. [2024-06-21 20:56:12,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 518 transitions, 8798 flow [2024-06-21 20:56:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 20:56:12,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 20:56:12,369 INFO L175 Difference]: Start difference. First operand has 306 places, 499 transitions, 7618 flow. Second operand 8 states and 143 transitions. [2024-06-21 20:56:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 518 transitions, 8798 flow [2024-06-21 20:56:14,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 518 transitions, 8577 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:56:14,250 INFO L231 Difference]: Finished difference. Result has 305 places, 502 transitions, 7574 flow [2024-06-21 20:56:14,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7574, PETRI_PLACES=305, PETRI_TRANSITIONS=502} [2024-06-21 20:56:14,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 20:56:14,250 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 502 transitions, 7574 flow [2024-06-21 20:56:14,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:14,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:14,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:56:14,251 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)] === [2024-06-21 20:56:14,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:14,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1600430271, now seen corresponding path program 1 times [2024-06-21 20:56:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299011730] [2024-06-21 20:56:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:14,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:14,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:14,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299011730] [2024-06-21 20:56:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299011730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:14,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:14,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705743900] [2024-06-21 20:56:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:14,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:14,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:15,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:15,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 502 transitions, 7574 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:15,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:15,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:15,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:16,547 INFO L124 PetriNetUnfolderBase]: 4642/7487 cut-off events. [2024-06-21 20:56:16,547 INFO L125 PetriNetUnfolderBase]: For 683998/684002 co-relation queries the response was YES. [2024-06-21 20:56:16,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 7487 events. 4642/7487 cut-off events. For 683998/684002 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 48570 event pairs, 1125 based on Foata normal form. 2/7477 useless extension candidates. Maximal degree in co-relation 70944. Up to 7136 conditions per place. [2024-06-21 20:56:16,651 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 476 selfloop transitions, 39 changer transitions 0/524 dead transitions. [2024-06-21 20:56:16,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 524 transitions, 8872 flow [2024-06-21 20:56:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:56:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:56:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 20:56:16,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 20:56:16,653 INFO L175 Difference]: Start difference. First operand has 305 places, 502 transitions, 7574 flow. Second operand 7 states and 135 transitions. [2024-06-21 20:56:16,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 524 transitions, 8872 flow [2024-06-21 20:56:18,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 524 transitions, 8719 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:18,669 INFO L231 Difference]: Finished difference. Result has 306 places, 505 transitions, 7547 flow [2024-06-21 20:56:18,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7547, PETRI_PLACES=306, PETRI_TRANSITIONS=505} [2024-06-21 20:56:18,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 20:56:18,669 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 505 transitions, 7547 flow [2024-06-21 20:56:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:18,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:18,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:56:18,670 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)] === [2024-06-21 20:56:18,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1600435851, now seen corresponding path program 2 times [2024-06-21 20:56:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:18,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709062686] [2024-06-21 20:56:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709062686] [2024-06-21 20:56:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709062686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:19,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:19,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703083865] [2024-06-21 20:56:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:19,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:19,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:19,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:19,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 505 transitions, 7547 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:19,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:19,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:19,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:21,180 INFO L124 PetriNetUnfolderBase]: 4684/7550 cut-off events. [2024-06-21 20:56:21,181 INFO L125 PetriNetUnfolderBase]: For 701858/701862 co-relation queries the response was YES. [2024-06-21 20:56:21,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71728 conditions, 7550 events. 4684/7550 cut-off events. For 701858/701862 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 48863 event pairs, 1129 based on Foata normal form. 2/7540 useless extension candidates. Maximal degree in co-relation 71585. Up to 7184 conditions per place. [2024-06-21 20:56:21,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 477 selfloop transitions, 39 changer transitions 0/525 dead transitions. [2024-06-21 20:56:21,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 525 transitions, 8845 flow [2024-06-21 20:56:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 20:56:21,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 20:56:21,287 INFO L175 Difference]: Start difference. First operand has 306 places, 505 transitions, 7547 flow. Second operand 8 states and 146 transitions. [2024-06-21 20:56:21,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 525 transitions, 8845 flow [2024-06-21 20:56:23,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 525 transitions, 8726 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:23,731 INFO L231 Difference]: Finished difference. Result has 309 places, 508 transitions, 7560 flow [2024-06-21 20:56:23,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7434, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7560, PETRI_PLACES=309, PETRI_TRANSITIONS=508} [2024-06-21 20:56:23,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 20:56:23,731 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 508 transitions, 7560 flow [2024-06-21 20:56:23,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:23,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:23,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:23,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:56:23,732 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)] === [2024-06-21 20:56:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 483410709, now seen corresponding path program 3 times [2024-06-21 20:56:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928750167] [2024-06-21 20:56:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:24,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:24,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928750167] [2024-06-21 20:56:24,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928750167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:24,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:24,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:24,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166086187] [2024-06-21 20:56:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:24,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:24,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:24,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:24,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:24,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 508 transitions, 7560 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:24,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:24,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:24,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:26,543 INFO L124 PetriNetUnfolderBase]: 4662/7517 cut-off events. [2024-06-21 20:56:26,544 INFO L125 PetriNetUnfolderBase]: For 713338/713342 co-relation queries the response was YES. [2024-06-21 20:56:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71523 conditions, 7517 events. 4662/7517 cut-off events. For 713338/713342 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48796 event pairs, 1124 based on Foata normal form. 2/7507 useless extension candidates. Maximal degree in co-relation 71379. Up to 7222 conditions per place. [2024-06-21 20:56:26,648 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 25 changer transitions 0/524 dead transitions. [2024-06-21 20:56:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 524 transitions, 8678 flow [2024-06-21 20:56:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 20:56:26,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 20:56:26,650 INFO L175 Difference]: Start difference. First operand has 309 places, 508 transitions, 7560 flow. Second operand 8 states and 137 transitions. [2024-06-21 20:56:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 524 transitions, 8678 flow [2024-06-21 20:56:28,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 524 transitions, 8592 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:28,618 INFO L231 Difference]: Finished difference. Result has 312 places, 511 transitions, 7584 flow [2024-06-21 20:56:28,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7584, PETRI_PLACES=312, PETRI_TRANSITIONS=511} [2024-06-21 20:56:28,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 20:56:28,618 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 511 transitions, 7584 flow [2024-06-21 20:56:28,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:28,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:28,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:28,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:56:28,619 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)] === [2024-06-21 20:56:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1019547913, now seen corresponding path program 4 times [2024-06-21 20:56:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:28,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073236500] [2024-06-21 20:56:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:28,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073236500] [2024-06-21 20:56:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073236500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:29,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404682697] [2024-06-21 20:56:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:29,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:29,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:56:29,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 511 transitions, 7584 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:29,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:29,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:56:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:31,033 INFO L124 PetriNetUnfolderBase]: 4664/7519 cut-off events. [2024-06-21 20:56:31,033 INFO L125 PetriNetUnfolderBase]: For 719283/719287 co-relation queries the response was YES. [2024-06-21 20:56:31,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71436 conditions, 7519 events. 4664/7519 cut-off events. For 719283/719287 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 48728 event pairs, 1125 based on Foata normal form. 3/7508 useless extension candidates. Maximal degree in co-relation 71291. Up to 7229 conditions per place. [2024-06-21 20:56:31,136 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 20 changer transitions 0/523 dead transitions. [2024-06-21 20:56:31,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 523 transitions, 8648 flow [2024-06-21 20:56:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 20:56:31,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 20:56:31,137 INFO L175 Difference]: Start difference. First operand has 312 places, 511 transitions, 7584 flow. Second operand 8 states and 134 transitions. [2024-06-21 20:56:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 523 transitions, 8648 flow [2024-06-21 20:56:33,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 523 transitions, 8550 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:33,247 INFO L231 Difference]: Finished difference. Result has 314 places, 511 transitions, 7532 flow [2024-06-21 20:56:33,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7486, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7532, PETRI_PLACES=314, PETRI_TRANSITIONS=511} [2024-06-21 20:56:33,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 20:56:33,247 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 511 transitions, 7532 flow [2024-06-21 20:56:33,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:33,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:33,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:33,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:56:33,248 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)] === [2024-06-21 20:56:33,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1490792924, now seen corresponding path program 1 times [2024-06-21 20:56:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:33,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869740119] [2024-06-21 20:56:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869740119] [2024-06-21 20:56:34,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869740119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:34,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:34,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871124942] [2024-06-21 20:56:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:34,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:34,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:34,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 511 transitions, 7532 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 20:56:34,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:34,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:34,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:36,477 INFO L124 PetriNetUnfolderBase]: 4843/7713 cut-off events. [2024-06-21 20:56:36,477 INFO L125 PetriNetUnfolderBase]: For 817844/817844 co-relation queries the response was YES. [2024-06-21 20:56:36,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74634 conditions, 7713 events. 4843/7713 cut-off events. For 817844/817844 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 49024 event pairs, 1198 based on Foata normal form. 2/7714 useless extension candidates. Maximal degree in co-relation 74488. Up to 7511 conditions per place. [2024-06-21 20:56:36,583 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 19 changer transitions 0/524 dead transitions. [2024-06-21 20:56:36,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 524 transitions, 8638 flow [2024-06-21 20:56:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 20:56:36,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 20:56:36,584 INFO L175 Difference]: Start difference. First operand has 314 places, 511 transitions, 7532 flow. Second operand 8 states and 126 transitions. [2024-06-21 20:56:36,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 524 transitions, 8638 flow [2024-06-21 20:56:38,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 524 transitions, 8545 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:56:38,758 INFO L231 Difference]: Finished difference. Result has 314 places, 513 transitions, 7522 flow [2024-06-21 20:56:38,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7439, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7522, PETRI_PLACES=314, PETRI_TRANSITIONS=513} [2024-06-21 20:56:38,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-21 20:56:38,758 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 513 transitions, 7522 flow [2024-06-21 20:56:38,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 20:56:38,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:38,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:56:38,759 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)] === [2024-06-21 20:56:38,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1977518144, now seen corresponding path program 1 times [2024-06-21 20:56:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:38,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211025296] [2024-06-21 20:56:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:39,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211025296] [2024-06-21 20:56:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211025296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45236084] [2024-06-21 20:56:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:39,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:39,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 513 transitions, 7522 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:39,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:39,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:39,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:41,709 INFO L124 PetriNetUnfolderBase]: 4855/7735 cut-off events. [2024-06-21 20:56:41,709 INFO L125 PetriNetUnfolderBase]: For 846123/846125 co-relation queries the response was YES. [2024-06-21 20:56:41,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74566 conditions, 7735 events. 4855/7735 cut-off events. For 846123/846125 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 49225 event pairs, 1027 based on Foata normal form. 14/7748 useless extension candidates. Maximal degree in co-relation 74419. Up to 7261 conditions per place. [2024-06-21 20:56:41,798 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 423 selfloop transitions, 128 changer transitions 0/555 dead transitions. [2024-06-21 20:56:41,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 555 transitions, 9222 flow [2024-06-21 20:56:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:56:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:56:41,799 INFO L175 Difference]: Start difference. First operand has 314 places, 513 transitions, 7522 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:56:41,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 555 transitions, 9222 flow [2024-06-21 20:56:44,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 555 transitions, 9155 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:44,123 INFO L231 Difference]: Finished difference. Result has 316 places, 531 transitions, 8104 flow [2024-06-21 20:56:44,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7455, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8104, PETRI_PLACES=316, PETRI_TRANSITIONS=531} [2024-06-21 20:56:44,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-21 20:56:44,124 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 531 transitions, 8104 flow [2024-06-21 20:56:44,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:44,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:44,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:44,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:56:44,124 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)] === [2024-06-21 20:56:44,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash -815356142, now seen corresponding path program 2 times [2024-06-21 20:56:44,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:44,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210996747] [2024-06-21 20:56:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:44,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:45,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:45,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210996747] [2024-06-21 20:56:45,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210996747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:45,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:45,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587745680] [2024-06-21 20:56:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:45,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:45,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:45,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 531 transitions, 8104 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:45,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:45,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:45,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:46,933 INFO L124 PetriNetUnfolderBase]: 4834/7699 cut-off events. [2024-06-21 20:56:46,933 INFO L125 PetriNetUnfolderBase]: For 823955/823957 co-relation queries the response was YES. [2024-06-21 20:56:47,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74265 conditions, 7699 events. 4834/7699 cut-off events. For 823955/823957 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 48928 event pairs, 1044 based on Foata normal form. 8/7706 useless extension candidates. Maximal degree in co-relation 74117. Up to 7380 conditions per place. [2024-06-21 20:56:47,048 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 476 selfloop transitions, 89 changer transitions 0/569 dead transitions. [2024-06-21 20:56:47,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 569 transitions, 9644 flow [2024-06-21 20:56:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:56:47,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:56:47,049 INFO L175 Difference]: Start difference. First operand has 316 places, 531 transitions, 8104 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:56:47,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 569 transitions, 9644 flow [2024-06-21 20:56:49,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 569 transitions, 9292 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:49,937 INFO L231 Difference]: Finished difference. Result has 319 places, 549 transitions, 8320 flow [2024-06-21 20:56:49,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8320, PETRI_PLACES=319, PETRI_TRANSITIONS=549} [2024-06-21 20:56:49,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 20:56:49,938 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 549 transitions, 8320 flow [2024-06-21 20:56:49,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:49,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:49,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:56:49,939 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)] === [2024-06-21 20:56:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -941698658, now seen corresponding path program 1 times [2024-06-21 20:56:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:49,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562648983] [2024-06-21 20:56:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:50,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:50,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562648983] [2024-06-21 20:56:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562648983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293557257] [2024-06-21 20:56:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:50,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:50,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 549 transitions, 8320 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:50,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:50,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:50,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:52,496 INFO L124 PetriNetUnfolderBase]: 4886/7771 cut-off events. [2024-06-21 20:56:52,496 INFO L125 PetriNetUnfolderBase]: For 847203/847205 co-relation queries the response was YES. [2024-06-21 20:56:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75128 conditions, 7771 events. 4886/7771 cut-off events. For 847203/847205 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 49350 event pairs, 1054 based on Foata normal form. 6/7776 useless extension candidates. Maximal degree in co-relation 74979. Up to 7336 conditions per place. [2024-06-21 20:56:52,598 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 521 selfloop transitions, 61 changer transitions 0/586 dead transitions. [2024-06-21 20:56:52,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 586 transitions, 10001 flow [2024-06-21 20:56:52,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:56:52,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:56:52,599 INFO L175 Difference]: Start difference. First operand has 319 places, 549 transitions, 8320 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:56:52,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 586 transitions, 10001 flow [2024-06-21 20:56:54,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 586 transitions, 9816 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:54,686 INFO L231 Difference]: Finished difference. Result has 324 places, 563 transitions, 8526 flow [2024-06-21 20:56:54,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8135, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8526, PETRI_PLACES=324, PETRI_TRANSITIONS=563} [2024-06-21 20:56:54,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 20:56:54,687 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 563 transitions, 8526 flow [2024-06-21 20:56:54,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:56:54,687 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)] === [2024-06-21 20:56:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:54,688 INFO L85 PathProgramCache]: Analyzing trace with hash -528468812, now seen corresponding path program 3 times [2024-06-21 20:56:54,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144430918] [2024-06-21 20:56:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:55,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:55,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144430918] [2024-06-21 20:56:55,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144430918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:55,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:55,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243848924] [2024-06-21 20:56:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:55,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:55,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:56:55,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 563 transitions, 8526 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:55,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:55,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:56:55,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:57,455 INFO L124 PetriNetUnfolderBase]: 4847/7702 cut-off events. [2024-06-21 20:56:57,455 INFO L125 PetriNetUnfolderBase]: For 854137/854137 co-relation queries the response was YES. [2024-06-21 20:56:57,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75068 conditions, 7702 events. 4847/7702 cut-off events. For 854137/854137 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48723 event pairs, 922 based on Foata normal form. 3/7704 useless extension candidates. Maximal degree in co-relation 74917. Up to 7394 conditions per place. [2024-06-21 20:56:57,563 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 499 selfloop transitions, 78 changer transitions 0/581 dead transitions. [2024-06-21 20:56:57,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 581 transitions, 9794 flow [2024-06-21 20:56:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:56:57,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:56:57,564 INFO L175 Difference]: Start difference. First operand has 324 places, 563 transitions, 8526 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:56:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 581 transitions, 9794 flow [2024-06-21 20:57:00,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 581 transitions, 9629 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:00,215 INFO L231 Difference]: Finished difference. Result has 329 places, 566 transitions, 8605 flow [2024-06-21 20:57:00,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8361, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8605, PETRI_PLACES=329, PETRI_TRANSITIONS=566} [2024-06-21 20:57:00,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 20:57:00,216 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 566 transitions, 8605 flow [2024-06-21 20:57:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:00,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:00,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:00,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:57:00,216 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)] === [2024-06-21 20:57:00,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2024490410, now seen corresponding path program 2 times [2024-06-21 20:57:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:00,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206207818] [2024-06-21 20:57:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206207818] [2024-06-21 20:57:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206207818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:00,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:00,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499707157] [2024-06-21 20:57:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:00,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:00,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:00,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:01,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 566 transitions, 8605 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:02,875 INFO L124 PetriNetUnfolderBase]: 4862/7725 cut-off events. [2024-06-21 20:57:02,875 INFO L125 PetriNetUnfolderBase]: For 866150/866152 co-relation queries the response was YES. [2024-06-21 20:57:02,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75372 conditions, 7725 events. 4862/7725 cut-off events. For 866150/866152 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48886 event pairs, 1047 based on Foata normal form. 4/7728 useless extension candidates. Maximal degree in co-relation 75219. Up to 7471 conditions per place. [2024-06-21 20:57:02,981 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 44 changer transitions 0/587 dead transitions. [2024-06-21 20:57:02,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 587 transitions, 9940 flow [2024-06-21 20:57:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 20:57:02,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 20:57:02,982 INFO L175 Difference]: Start difference. First operand has 329 places, 566 transitions, 8605 flow. Second operand 9 states and 146 transitions. [2024-06-21 20:57:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 587 transitions, 9940 flow [2024-06-21 20:57:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 587 transitions, 9707 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:05,323 INFO L231 Difference]: Finished difference. Result has 332 places, 573 transitions, 8589 flow [2024-06-21 20:57:05,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8372, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8589, PETRI_PLACES=332, PETRI_TRANSITIONS=573} [2024-06-21 20:57:05,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 20:57:05,324 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 573 transitions, 8589 flow [2024-06-21 20:57:05,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:05,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:05,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:05,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:57:05,325 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)] === [2024-06-21 20:57:05,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1549294404, now seen corresponding path program 3 times [2024-06-21 20:57:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517207325] [2024-06-21 20:57:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:05,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:05,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517207325] [2024-06-21 20:57:05,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517207325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:05,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:05,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:05,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937513812] [2024-06-21 20:57:05,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:05,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:05,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:05,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:06,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 573 transitions, 8589 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:08,181 INFO L124 PetriNetUnfolderBase]: 4888/7769 cut-off events. [2024-06-21 20:57:08,181 INFO L125 PetriNetUnfolderBase]: For 891882/891884 co-relation queries the response was YES. [2024-06-21 20:57:08,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76068 conditions, 7769 events. 4888/7769 cut-off events. For 891882/891884 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49318 event pairs, 1049 based on Foata normal form. 4/7772 useless extension candidates. Maximal degree in co-relation 75914. Up to 7464 conditions per place. [2024-06-21 20:57:08,275 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 531 selfloop transitions, 63 changer transitions 0/598 dead transitions. [2024-06-21 20:57:08,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 598 transitions, 10203 flow [2024-06-21 20:57:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:57:08,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:57:08,276 INFO L175 Difference]: Start difference. First operand has 332 places, 573 transitions, 8589 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:57:08,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 598 transitions, 10203 flow [2024-06-21 20:57:10,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 598 transitions, 10084 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:10,997 INFO L231 Difference]: Finished difference. Result has 336 places, 579 transitions, 8773 flow [2024-06-21 20:57:10,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8470, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8773, PETRI_PLACES=336, PETRI_TRANSITIONS=579} [2024-06-21 20:57:10,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-21 20:57:10,997 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 579 transitions, 8773 flow [2024-06-21 20:57:10,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:10,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:10,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:10,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:57:10,998 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)] === [2024-06-21 20:57:10,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash -538599488, now seen corresponding path program 1 times [2024-06-21 20:57:10,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:10,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509565104] [2024-06-21 20:57:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:10,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509565104] [2024-06-21 20:57:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509565104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154351564] [2024-06-21 20:57:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:12,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:12,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 579 transitions, 8773 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:12,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:12,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:12,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:13,918 INFO L124 PetriNetUnfolderBase]: 4896/7777 cut-off events. [2024-06-21 20:57:13,918 INFO L125 PetriNetUnfolderBase]: For 910017/910019 co-relation queries the response was YES. [2024-06-21 20:57:13,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76413 conditions, 7777 events. 4896/7777 cut-off events. For 910017/910019 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 49066 event pairs, 891 based on Foata normal form. 4/7780 useless extension candidates. Maximal degree in co-relation 76258. Up to 7386 conditions per place. [2024-06-21 20:57:14,029 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 527 selfloop transitions, 76 changer transitions 0/607 dead transitions. [2024-06-21 20:57:14,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 607 transitions, 10291 flow [2024-06-21 20:57:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:57:14,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:57:14,030 INFO L175 Difference]: Start difference. First operand has 336 places, 579 transitions, 8773 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:57:14,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 607 transitions, 10291 flow [2024-06-21 20:57:17,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 607 transitions, 10149 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:17,251 INFO L231 Difference]: Finished difference. Result has 340 places, 581 transitions, 8834 flow [2024-06-21 20:57:17,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8834, PETRI_PLACES=340, PETRI_TRANSITIONS=581} [2024-06-21 20:57:17,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 20:57:17,252 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 581 transitions, 8834 flow [2024-06-21 20:57:17,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:17,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:17,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:17,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:57:17,252 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)] === [2024-06-21 20:57:17,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash -538302818, now seen corresponding path program 2 times [2024-06-21 20:57:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250098457] [2024-06-21 20:57:17,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:17,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250098457] [2024-06-21 20:57:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250098457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576952986] [2024-06-21 20:57:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:18,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:18,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 581 transitions, 8834 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:18,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:18,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:18,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:20,317 INFO L124 PetriNetUnfolderBase]: 4904/7791 cut-off events. [2024-06-21 20:57:20,317 INFO L125 PetriNetUnfolderBase]: For 924732/924734 co-relation queries the response was YES. [2024-06-21 20:57:20,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76771 conditions, 7791 events. 4904/7791 cut-off events. For 924732/924734 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49437 event pairs, 1032 based on Foata normal form. 4/7794 useless extension candidates. Maximal degree in co-relation 76614. Up to 7468 conditions per place. [2024-06-21 20:57:20,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 527 selfloop transitions, 73 changer transitions 0/604 dead transitions. [2024-06-21 20:57:20,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 604 transitions, 10150 flow [2024-06-21 20:57:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 20:57:20,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 20:57:20,430 INFO L175 Difference]: Start difference. First operand has 340 places, 581 transitions, 8834 flow. Second operand 8 states and 140 transitions. [2024-06-21 20:57:20,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 604 transitions, 10150 flow [2024-06-21 20:57:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 604 transitions, 9940 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:57:23,610 INFO L231 Difference]: Finished difference. Result has 341 places, 583 transitions, 8834 flow [2024-06-21 20:57:23,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8834, PETRI_PLACES=341, PETRI_TRANSITIONS=583} [2024-06-21 20:57:23,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-21 20:57:23,611 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 583 transitions, 8834 flow [2024-06-21 20:57:23,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:23,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:23,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:57:23,611 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)] === [2024-06-21 20:57:23,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash -528471788, now seen corresponding path program 3 times [2024-06-21 20:57:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:23,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63234487] [2024-06-21 20:57:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:24,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63234487] [2024-06-21 20:57:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63234487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:24,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500013267] [2024-06-21 20:57:24,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:24,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:24,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:24,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 583 transitions, 8834 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:24,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:24,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:24,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:26,731 INFO L124 PetriNetUnfolderBase]: 4912/7799 cut-off events. [2024-06-21 20:57:26,731 INFO L125 PetriNetUnfolderBase]: For 942021/942021 co-relation queries the response was YES. [2024-06-21 20:57:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76947 conditions, 7799 events. 4912/7799 cut-off events. For 942021/942021 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 49396 event pairs, 921 based on Foata normal form. 2/7800 useless extension candidates. Maximal degree in co-relation 76789. Up to 7486 conditions per place. [2024-06-21 20:57:26,835 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 526 selfloop transitions, 71 changer transitions 0/601 dead transitions. [2024-06-21 20:57:26,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 601 transitions, 10124 flow [2024-06-21 20:57:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:57:26,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:57:26,836 INFO L175 Difference]: Start difference. First operand has 341 places, 583 transitions, 8834 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:57:26,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 601 transitions, 10124 flow [2024-06-21 20:57:28,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 601 transitions, 9954 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:28,951 INFO L231 Difference]: Finished difference. Result has 343 places, 585 transitions, 8865 flow [2024-06-21 20:57:28,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8664, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8865, PETRI_PLACES=343, PETRI_TRANSITIONS=585} [2024-06-21 20:57:28,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 20:57:28,951 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 585 transitions, 8865 flow [2024-06-21 20:57:28,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:28,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:28,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:28,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:57:28,952 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)] === [2024-06-21 20:57:28,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash -539840856, now seen corresponding path program 4 times [2024-06-21 20:57:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:28,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682760148] [2024-06-21 20:57:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:28,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682760148] [2024-06-21 20:57:29,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682760148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:29,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:29,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:29,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4756538] [2024-06-21 20:57:29,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:29,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:29,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:29,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:29,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 585 transitions, 8865 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:29,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:29,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:29,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:31,631 INFO L124 PetriNetUnfolderBase]: 4948/7857 cut-off events. [2024-06-21 20:57:31,631 INFO L125 PetriNetUnfolderBase]: For 976986/976990 co-relation queries the response was YES. [2024-06-21 20:57:31,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77817 conditions, 7857 events. 4948/7857 cut-off events. For 976986/976990 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 49916 event pairs, 1048 based on Foata normal form. 8/7864 useless extension candidates. Maximal degree in co-relation 77658. Up to 7120 conditions per place. [2024-06-21 20:57:31,747 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 516 selfloop transitions, 112 changer transitions 0/632 dead transitions. [2024-06-21 20:57:31,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 632 transitions, 10949 flow [2024-06-21 20:57:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:57:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:57:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 20:57:31,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 20:57:31,748 INFO L175 Difference]: Start difference. First operand has 343 places, 585 transitions, 8865 flow. Second operand 9 states and 160 transitions. [2024-06-21 20:57:31,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 632 transitions, 10949 flow [2024-06-21 20:57:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 632 transitions, 10776 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:35,634 INFO L231 Difference]: Finished difference. Result has 347 places, 605 transitions, 9254 flow [2024-06-21 20:57:35,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8692, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9254, PETRI_PLACES=347, PETRI_TRANSITIONS=605} [2024-06-21 20:57:35,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 20:57:35,635 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 605 transitions, 9254 flow [2024-06-21 20:57:35,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:35,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:35,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:35,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:57:35,635 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)] === [2024-06-21 20:57:35,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2024363176, now seen corresponding path program 5 times [2024-06-21 20:57:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807449319] [2024-06-21 20:57:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807449319] [2024-06-21 20:57:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807449319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:36,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:36,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651478689] [2024-06-21 20:57:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:36,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:36,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 605 transitions, 9254 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:36,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:36,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:36,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:38,542 INFO L124 PetriNetUnfolderBase]: 5000/7933 cut-off events. [2024-06-21 20:57:38,542 INFO L125 PetriNetUnfolderBase]: For 1025513/1025517 co-relation queries the response was YES. [2024-06-21 20:57:38,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80119 conditions, 7933 events. 5000/7933 cut-off events. For 1025513/1025517 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50377 event pairs, 1051 based on Foata normal form. 8/7940 useless extension candidates. Maximal degree in co-relation 79958. Up to 7160 conditions per place. [2024-06-21 20:57:38,643 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 512 selfloop transitions, 124 changer transitions 0/640 dead transitions. [2024-06-21 20:57:38,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 640 transitions, 11337 flow [2024-06-21 20:57:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:57:38,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:57:38,644 INFO L175 Difference]: Start difference. First operand has 347 places, 605 transitions, 9254 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:57:38,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 640 transitions, 11337 flow [2024-06-21 20:57:42,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 640 transitions, 11092 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:42,199 INFO L231 Difference]: Finished difference. Result has 353 places, 615 transitions, 9570 flow [2024-06-21 20:57:42,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9067, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9570, PETRI_PLACES=353, PETRI_TRANSITIONS=615} [2024-06-21 20:57:42,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-21 20:57:42,200 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 615 transitions, 9570 flow [2024-06-21 20:57:42,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:42,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:42,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:42,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:57:42,200 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)] === [2024-06-21 20:57:42,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1926102360, now seen corresponding path program 6 times [2024-06-21 20:57:42,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:42,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847201971] [2024-06-21 20:57:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:42,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:42,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847201971] [2024-06-21 20:57:42,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847201971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966286524] [2024-06-21 20:57:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:42,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:42,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:42,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 615 transitions, 9570 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:42,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:42,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:42,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:44,862 INFO L124 PetriNetUnfolderBase]: 4988/7917 cut-off events. [2024-06-21 20:57:44,863 INFO L125 PetriNetUnfolderBase]: For 1018383/1018387 co-relation queries the response was YES. [2024-06-21 20:57:44,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79590 conditions, 7917 events. 4988/7917 cut-off events. For 1018383/1018387 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50320 event pairs, 1051 based on Foata normal form. 8/7924 useless extension candidates. Maximal degree in co-relation 79425. Up to 7152 conditions per place. [2024-06-21 20:57:44,976 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 128 changer transitions 0/637 dead transitions. [2024-06-21 20:57:44,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 637 transitions, 11190 flow [2024-06-21 20:57:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:57:44,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:57:44,977 INFO L175 Difference]: Start difference. First operand has 353 places, 615 transitions, 9570 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:57:44,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 637 transitions, 11190 flow [2024-06-21 20:57:48,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 637 transitions, 10938 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-21 20:57:48,520 INFO L231 Difference]: Finished difference. Result has 358 places, 615 transitions, 9581 flow [2024-06-21 20:57:48,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9581, PETRI_PLACES=358, PETRI_TRANSITIONS=615} [2024-06-21 20:57:48,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-21 20:57:48,520 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 615 transitions, 9581 flow [2024-06-21 20:57:48,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:48,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:48,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:48,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:57:48,521 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)] === [2024-06-21 20:57:48,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash 206716904, now seen corresponding path program 7 times [2024-06-21 20:57:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686725475] [2024-06-21 20:57:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:49,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686725475] [2024-06-21 20:57:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686725475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:49,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:49,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:57:49,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988462196] [2024-06-21 20:57:49,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:49,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:57:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:57:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:57:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:49,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 615 transitions, 9581 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:49,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:49,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:49,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:51,224 INFO L124 PetriNetUnfolderBase]: 4998/7933 cut-off events. [2024-06-21 20:57:51,224 INFO L125 PetriNetUnfolderBase]: For 1026129/1026133 co-relation queries the response was YES. [2024-06-21 20:57:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79835 conditions, 7933 events. 4998/7933 cut-off events. For 1026129/1026133 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 50434 event pairs, 1046 based on Foata normal form. 6/7938 useless extension candidates. Maximal degree in co-relation 79669. Up to 7644 conditions per place. [2024-06-21 20:57:51,344 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 582 selfloop transitions, 49 changer transitions 0/635 dead transitions. [2024-06-21 20:57:51,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 635 transitions, 11313 flow [2024-06-21 20:57:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 20:57:51,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 20:57:51,345 INFO L175 Difference]: Start difference. First operand has 358 places, 615 transitions, 9581 flow. Second operand 8 states and 133 transitions. [2024-06-21 20:57:51,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 635 transitions, 11313 flow [2024-06-21 20:57:54,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 635 transitions, 11056 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:57:54,623 INFO L231 Difference]: Finished difference. Result has 360 places, 621 transitions, 9643 flow [2024-06-21 20:57:54,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9332, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9643, PETRI_PLACES=360, PETRI_TRANSITIONS=621} [2024-06-21 20:57:54,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 20:57:54,623 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 621 transitions, 9643 flow [2024-06-21 20:57:54,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:54,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:54,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:54,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:57:54,624 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)] === [2024-06-21 20:57:54,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 615896244, now seen corresponding path program 4 times [2024-06-21 20:57:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789783439] [2024-06-21 20:57:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:55,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789783439] [2024-06-21 20:57:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789783439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:55,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:55,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:57:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850609707] [2024-06-21 20:57:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:57:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:57:55,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:57:55,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:57:55,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 621 transitions, 9643 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:55,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:55,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:57:55,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:57:57,391 INFO L124 PetriNetUnfolderBase]: 4971/7888 cut-off events. [2024-06-21 20:57:57,392 INFO L125 PetriNetUnfolderBase]: For 1031220/1031220 co-relation queries the response was YES. [2024-06-21 20:57:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79138 conditions, 7888 events. 4971/7888 cut-off events. For 1031220/1031220 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 50026 event pairs, 924 based on Foata normal form. 1/7888 useless extension candidates. Maximal degree in co-relation 78971. Up to 7567 conditions per place. [2024-06-21 20:57:57,510 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 558 selfloop transitions, 69 changer transitions 0/631 dead transitions. [2024-06-21 20:57:57,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 631 transitions, 10925 flow [2024-06-21 20:57:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:57:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:57:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:57:57,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:57:57,511 INFO L175 Difference]: Start difference. First operand has 360 places, 621 transitions, 9643 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:57:57,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 631 transitions, 10925 flow [2024-06-21 20:58:00,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 631 transitions, 10757 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:00,630 INFO L231 Difference]: Finished difference. Result has 364 places, 621 transitions, 9619 flow [2024-06-21 20:58:00,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9475, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9619, PETRI_PLACES=364, PETRI_TRANSITIONS=621} [2024-06-21 20:58:00,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 20:58:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 621 transitions, 9619 flow [2024-06-21 20:58:00,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:00,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:00,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:58:00,632 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)] === [2024-06-21 20:58:00,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash 662041478, now seen corresponding path program 8 times [2024-06-21 20:58:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:00,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393188336] [2024-06-21 20:58:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393188336] [2024-06-21 20:58:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393188336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:01,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:01,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464549283] [2024-06-21 20:58:01,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:01,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:01,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 621 transitions, 9619 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:01,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:01,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:03,590 INFO L124 PetriNetUnfolderBase]: 4981/7905 cut-off events. [2024-06-21 20:58:03,590 INFO L125 PetriNetUnfolderBase]: For 1052446/1052450 co-relation queries the response was YES. [2024-06-21 20:58:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79454 conditions, 7905 events. 4981/7905 cut-off events. For 1052446/1052450 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 50204 event pairs, 1043 based on Foata normal form. 6/7910 useless extension candidates. Maximal degree in co-relation 79285. Up to 7631 conditions per place. [2024-06-21 20:58:03,699 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 589 selfloop transitions, 43 changer transitions 0/636 dead transitions. [2024-06-21 20:58:03,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 636 transitions, 11027 flow [2024-06-21 20:58:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 20:58:03,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 20:58:03,701 INFO L175 Difference]: Start difference. First operand has 364 places, 621 transitions, 9619 flow. Second operand 8 states and 130 transitions. [2024-06-21 20:58:03,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 636 transitions, 11027 flow [2024-06-21 20:58:07,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 636 transitions, 10754 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 20:58:07,309 INFO L231 Difference]: Finished difference. Result has 364 places, 625 transitions, 9546 flow [2024-06-21 20:58:07,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9346, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9546, PETRI_PLACES=364, PETRI_TRANSITIONS=625} [2024-06-21 20:58:07,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 20:58:07,310 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 625 transitions, 9546 flow [2024-06-21 20:58:07,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:07,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:07,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:58:07,311 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)] === [2024-06-21 20:58:07,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1541208042, now seen corresponding path program 9 times [2024-06-21 20:58:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633998397] [2024-06-21 20:58:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:07,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:07,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633998397] [2024-06-21 20:58:07,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633998397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:07,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:07,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:07,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374635676] [2024-06-21 20:58:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:07,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:07,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:08,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:08,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 625 transitions, 9546 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:08,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:08,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:08,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:09,930 INFO L124 PetriNetUnfolderBase]: 4991/7921 cut-off events. [2024-06-21 20:58:09,930 INFO L125 PetriNetUnfolderBase]: For 1070975/1070979 co-relation queries the response was YES. [2024-06-21 20:58:10,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79640 conditions, 7921 events. 4991/7921 cut-off events. For 1070975/1070979 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 50333 event pairs, 1043 based on Foata normal form. 6/7926 useless extension candidates. Maximal degree in co-relation 79470. Up to 7612 conditions per place. [2024-06-21 20:58:10,054 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 579 selfloop transitions, 60 changer transitions 0/643 dead transitions. [2024-06-21 20:58:10,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 643 transitions, 11184 flow [2024-06-21 20:58:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 20:58:10,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 20:58:10,055 INFO L175 Difference]: Start difference. First operand has 364 places, 625 transitions, 9546 flow. Second operand 8 states and 132 transitions. [2024-06-21 20:58:10,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 643 transitions, 11184 flow [2024-06-21 20:58:14,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 643 transitions, 11032 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 20:58:14,272 INFO L231 Difference]: Finished difference. Result has 368 places, 630 transitions, 9650 flow [2024-06-21 20:58:14,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9394, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9650, PETRI_PLACES=368, PETRI_TRANSITIONS=630} [2024-06-21 20:58:14,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 20:58:14,272 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 630 transitions, 9650 flow [2024-06-21 20:58:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:14,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:14,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:58:14,273 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)] === [2024-06-21 20:58:14,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1535494122, now seen corresponding path program 10 times [2024-06-21 20:58:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:14,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268616254] [2024-06-21 20:58:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:14,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:14,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268616254] [2024-06-21 20:58:14,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268616254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:14,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:14,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:14,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818797909] [2024-06-21 20:58:14,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:14,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:14,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:14,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:14,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:14,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 630 transitions, 9650 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:14,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:14,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:14,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:17,151 INFO L124 PetriNetUnfolderBase]: 4985/7911 cut-off events. [2024-06-21 20:58:17,151 INFO L125 PetriNetUnfolderBase]: For 1079009/1079013 co-relation queries the response was YES. [2024-06-21 20:58:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79639 conditions, 7911 events. 4985/7911 cut-off events. For 1079009/1079013 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 50256 event pairs, 1038 based on Foata normal form. 6/7916 useless extension candidates. Maximal degree in co-relation 79467. Up to 7637 conditions per place. [2024-06-21 20:58:17,257 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 591 selfloop transitions, 46 changer transitions 0/641 dead transitions. [2024-06-21 20:58:17,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 641 transitions, 10966 flow [2024-06-21 20:58:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:58:17,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:58:17,259 INFO L175 Difference]: Start difference. First operand has 368 places, 630 transitions, 9650 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:58:17,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 641 transitions, 10966 flow [2024-06-21 20:58:21,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 641 transitions, 10727 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-21 20:58:21,416 INFO L231 Difference]: Finished difference. Result has 372 places, 630 transitions, 9509 flow [2024-06-21 20:58:21,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9411, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9509, PETRI_PLACES=372, PETRI_TRANSITIONS=630} [2024-06-21 20:58:21,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-21 20:58:21,417 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 630 transitions, 9509 flow [2024-06-21 20:58:21,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:21,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:21,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:21,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:58:21,417 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)] === [2024-06-21 20:58:21,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1312891182, now seen corresponding path program 11 times [2024-06-21 20:58:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:21,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640181510] [2024-06-21 20:58:21,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:22,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640181510] [2024-06-21 20:58:22,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640181510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:22,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:22,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:22,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168715610] [2024-06-21 20:58:22,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:22,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:22,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 630 transitions, 9509 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:22,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:22,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:24,110 INFO L124 PetriNetUnfolderBase]: 4995/7929 cut-off events. [2024-06-21 20:58:24,110 INFO L125 PetriNetUnfolderBase]: For 1095329/1095333 co-relation queries the response was YES. [2024-06-21 20:58:24,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79728 conditions, 7929 events. 4995/7929 cut-off events. For 1095329/1095333 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50446 event pairs, 1040 based on Foata normal form. 6/7934 useless extension candidates. Maximal degree in co-relation 79555. Up to 7544 conditions per place. [2024-06-21 20:58:24,233 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 562 selfloop transitions, 89 changer transitions 0/655 dead transitions. [2024-06-21 20:58:24,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 655 transitions, 11513 flow [2024-06-21 20:58:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 20:58:24,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:58:24,235 INFO L175 Difference]: Start difference. First operand has 372 places, 630 transitions, 9509 flow. Second operand 8 states and 136 transitions. [2024-06-21 20:58:24,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 655 transitions, 11513 flow [2024-06-21 20:58:28,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 655 transitions, 11395 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:28,471 INFO L231 Difference]: Finished difference. Result has 374 places, 638 transitions, 9834 flow [2024-06-21 20:58:28,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9391, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9834, PETRI_PLACES=374, PETRI_TRANSITIONS=638} [2024-06-21 20:58:28,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 20:58:28,472 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 638 transitions, 9834 flow [2024-06-21 20:58:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:58:28,472 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)] === [2024-06-21 20:58:28,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 793563816, now seen corresponding path program 12 times [2024-06-21 20:58:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235858475] [2024-06-21 20:58:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235858475] [2024-06-21 20:58:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235858475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:29,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759869257] [2024-06-21 20:58:29,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:29,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:29,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:29,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 638 transitions, 9834 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:29,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:29,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:29,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:31,176 INFO L124 PetriNetUnfolderBase]: 4989/7919 cut-off events. [2024-06-21 20:58:31,176 INFO L125 PetriNetUnfolderBase]: For 1104446/1104450 co-relation queries the response was YES. [2024-06-21 20:58:31,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79907 conditions, 7919 events. 4989/7919 cut-off events. For 1104446/1104450 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 50362 event pairs, 1035 based on Foata normal form. 6/7924 useless extension candidates. Maximal degree in co-relation 79732. Up to 7539 conditions per place. [2024-06-21 20:58:31,290 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 96 changer transitions 0/654 dead transitions. [2024-06-21 20:58:31,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 654 transitions, 11430 flow [2024-06-21 20:58:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 20:58:31,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 20:58:31,291 INFO L175 Difference]: Start difference. First operand has 374 places, 638 transitions, 9834 flow. Second operand 8 states and 135 transitions. [2024-06-21 20:58:31,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 654 transitions, 11430 flow [2024-06-21 20:58:35,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 654 transitions, 11238 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 20:58:36,000 INFO L231 Difference]: Finished difference. Result has 379 places, 638 transitions, 9840 flow [2024-06-21 20:58:36,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9642, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9840, PETRI_PLACES=379, PETRI_TRANSITIONS=638} [2024-06-21 20:58:36,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-21 20:58:36,001 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 638 transitions, 9840 flow [2024-06-21 20:58:36,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:36,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:36,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:36,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:58:36,002 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)] === [2024-06-21 20:58:36,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -834698080, now seen corresponding path program 4 times [2024-06-21 20:58:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:36,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840208851] [2024-06-21 20:58:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:37,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:37,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840208851] [2024-06-21 20:58:37,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840208851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:37,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:37,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:58:37,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230339436] [2024-06-21 20:58:37,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:37,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:58:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:58:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:58:37,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:37,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 638 transitions, 9840 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:37,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:37,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:37,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:39,517 INFO L124 PetriNetUnfolderBase]: 4984/7909 cut-off events. [2024-06-21 20:58:39,517 INFO L125 PetriNetUnfolderBase]: For 1108314/1108314 co-relation queries the response was YES. [2024-06-21 20:58:39,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79805 conditions, 7909 events. 4984/7909 cut-off events. For 1108314/1108314 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 50169 event pairs, 915 based on Foata normal form. 2/7910 useless extension candidates. Maximal degree in co-relation 79628. Up to 7583 conditions per place. [2024-06-21 20:58:39,722 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 577 selfloop transitions, 68 changer transitions 0/649 dead transitions. [2024-06-21 20:58:39,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 649 transitions, 11160 flow [2024-06-21 20:58:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 20:58:39,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 20:58:39,729 INFO L175 Difference]: Start difference. First operand has 379 places, 638 transitions, 9840 flow. Second operand 8 states and 129 transitions. [2024-06-21 20:58:39,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 649 transitions, 11160 flow [2024-06-21 20:58:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 649 transitions, 10939 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:58:43,173 INFO L231 Difference]: Finished difference. Result has 381 places, 638 transitions, 9760 flow [2024-06-21 20:58:43,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9619, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9760, PETRI_PLACES=381, PETRI_TRANSITIONS=638} [2024-06-21 20:58:43,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-21 20:58:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 638 transitions, 9760 flow [2024-06-21 20:58:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:43,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:43,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:58:43,174 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)] === [2024-06-21 20:58:43,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1722267350, now seen corresponding path program 13 times [2024-06-21 20:58:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:43,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217257862] [2024-06-21 20:58:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:43,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217257862] [2024-06-21 20:58:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217257862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:43,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:43,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:43,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674563330] [2024-06-21 20:58:43,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:43,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:43,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:43,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:58:43,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 638 transitions, 9760 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:43,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:43,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:58:43,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:46,504 INFO L124 PetriNetUnfolderBase]: 4993/7931 cut-off events. [2024-06-21 20:58:46,504 INFO L125 PetriNetUnfolderBase]: For 1114052/1114054 co-relation queries the response was YES. [2024-06-21 20:58:46,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79739 conditions, 7931 events. 4993/7931 cut-off events. For 1114052/1114054 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50510 event pairs, 1032 based on Foata normal form. 4/7934 useless extension candidates. Maximal degree in co-relation 79561. Up to 7642 conditions per place. [2024-06-21 20:58:46,616 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 608 selfloop transitions, 52 changer transitions 0/664 dead transitions. [2024-06-21 20:58:46,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 664 transitions, 11246 flow [2024-06-21 20:58:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:58:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:58:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 20:58:46,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 20:58:46,617 INFO L175 Difference]: Start difference. First operand has 381 places, 638 transitions, 9760 flow. Second operand 9 states and 153 transitions. [2024-06-21 20:58:46,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 664 transitions, 11246 flow [2024-06-21 20:58:51,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 664 transitions, 11030 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:51,120 INFO L231 Difference]: Finished difference. Result has 383 places, 644 transitions, 9758 flow [2024-06-21 20:58:51,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9758, PETRI_PLACES=383, PETRI_TRANSITIONS=644} [2024-06-21 20:58:51,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-21 20:58:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 644 transitions, 9758 flow [2024-06-21 20:58:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:58:51,121 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)] === [2024-06-21 20:58:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2041681458, now seen corresponding path program 1 times [2024-06-21 20:58:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934470313] [2024-06-21 20:58:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:51,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:52,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:52,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934470313] [2024-06-21 20:58:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934470313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:52,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:52,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089798868] [2024-06-21 20:58:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:52,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:52,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 644 transitions, 9758 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:52,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:52,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:52,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:58:54,567 INFO L124 PetriNetUnfolderBase]: 4859/7790 cut-off events. [2024-06-21 20:58:54,567 INFO L125 PetriNetUnfolderBase]: For 997726/997736 co-relation queries the response was YES. [2024-06-21 20:58:54,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76476 conditions, 7790 events. 4859/7790 cut-off events. For 997726/997736 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 50345 event pairs, 1074 based on Foata normal form. 2/7783 useless extension candidates. Maximal degree in co-relation 76297. Up to 7337 conditions per place. [2024-06-21 20:58:54,675 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 606 selfloop transitions, 30 changer transitions 0/670 dead transitions. [2024-06-21 20:58:54,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 670 transitions, 11490 flow [2024-06-21 20:58:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:58:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:58:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 20:58:54,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 20:58:54,676 INFO L175 Difference]: Start difference. First operand has 383 places, 644 transitions, 9758 flow. Second operand 8 states and 147 transitions. [2024-06-21 20:58:54,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 670 transitions, 11490 flow [2024-06-21 20:58:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 670 transitions, 11364 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:58:58,276 INFO L231 Difference]: Finished difference. Result has 384 places, 648 transitions, 9877 flow [2024-06-21 20:58:58,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9632, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9877, PETRI_PLACES=384, PETRI_TRANSITIONS=648} [2024-06-21 20:58:58,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-21 20:58:58,277 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 648 transitions, 9877 flow [2024-06-21 20:58:58,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:58,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:58:58,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:58:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:58:58,278 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)] === [2024-06-21 20:58:58,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:58:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359734, now seen corresponding path program 1 times [2024-06-21 20:58:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:58:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539093295] [2024-06-21 20:58:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:58:58,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:58:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:58:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:58:59,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:58:59,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539093295] [2024-06-21 20:58:59,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539093295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:58:59,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:58:59,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:58:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040879482] [2024-06-21 20:58:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:58:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:58:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:58:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:58:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:58:59,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:58:59,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 648 transitions, 9877 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:58:59,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:58:59,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:58:59,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:01,666 INFO L124 PetriNetUnfolderBase]: 4884/7826 cut-off events. [2024-06-21 20:59:01,666 INFO L125 PetriNetUnfolderBase]: For 1024135/1024145 co-relation queries the response was YES. [2024-06-21 20:59:01,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77098 conditions, 7826 events. 4884/7826 cut-off events. For 1024135/1024145 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50603 event pairs, 1116 based on Foata normal form. 2/7819 useless extension candidates. Maximal degree in co-relation 76918. Up to 7279 conditions per place. [2024-06-21 20:59:01,776 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 580 selfloop transitions, 68 changer transitions 0/682 dead transitions. [2024-06-21 20:59:01,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 682 transitions, 11917 flow [2024-06-21 20:59:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 20:59:01,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 20:59:01,777 INFO L175 Difference]: Start difference. First operand has 384 places, 648 transitions, 9877 flow. Second operand 8 states and 151 transitions. [2024-06-21 20:59:01,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 682 transitions, 11917 flow [2024-06-21 20:59:06,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 682 transitions, 11780 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 20:59:06,183 INFO L231 Difference]: Finished difference. Result has 390 places, 660 transitions, 10131 flow [2024-06-21 20:59:06,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9743, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10131, PETRI_PLACES=390, PETRI_TRANSITIONS=660} [2024-06-21 20:59:06,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 20:59:06,184 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 660 transitions, 10131 flow [2024-06-21 20:59:06,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:06,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:06,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:06,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:59:06,184 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)] === [2024-06-21 20:59:06,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2041678668, now seen corresponding path program 2 times [2024-06-21 20:59:06,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:06,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676054959] [2024-06-21 20:59:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:06,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:07,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:07,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676054959] [2024-06-21 20:59:07,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676054959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:07,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:07,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696889024] [2024-06-21 20:59:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:07,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:07,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 660 transitions, 10131 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:07,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:07,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:07,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:09,740 INFO L124 PetriNetUnfolderBase]: 4879/7821 cut-off events. [2024-06-21 20:59:09,740 INFO L125 PetriNetUnfolderBase]: For 1035239/1035249 co-relation queries the response was YES. [2024-06-21 20:59:09,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77633 conditions, 7821 events. 4879/7821 cut-off events. For 1035239/1035249 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50620 event pairs, 1114 based on Foata normal form. 2/7814 useless extension candidates. Maximal degree in co-relation 77449. Up to 7396 conditions per place. [2024-06-21 20:59:09,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 612 selfloop transitions, 32 changer transitions 0/678 dead transitions. [2024-06-21 20:59:09,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 678 transitions, 11475 flow [2024-06-21 20:59:09,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 20:59:09,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 20:59:09,877 INFO L175 Difference]: Start difference. First operand has 390 places, 660 transitions, 10131 flow. Second operand 9 states and 157 transitions. [2024-06-21 20:59:09,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 678 transitions, 11475 flow [2024-06-21 20:59:14,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 678 transitions, 11332 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-21 20:59:14,784 INFO L231 Difference]: Finished difference. Result has 397 places, 660 transitions, 10058 flow [2024-06-21 20:59:14,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9988, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10058, PETRI_PLACES=397, PETRI_TRANSITIONS=660} [2024-06-21 20:59:14,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 20:59:14,785 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 660 transitions, 10058 flow [2024-06-21 20:59:14,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:14,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:14,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:14,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:59:14,785 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)] === [2024-06-21 20:59:14,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2041558574, now seen corresponding path program 2 times [2024-06-21 20:59:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81855330] [2024-06-21 20:59:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81855330] [2024-06-21 20:59:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81855330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:15,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:15,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252054059] [2024-06-21 20:59:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:15,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:15,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:15,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 660 transitions, 10058 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:15,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:15,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:15,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:18,168 INFO L124 PetriNetUnfolderBase]: 4884/7827 cut-off events. [2024-06-21 20:59:18,168 INFO L125 PetriNetUnfolderBase]: For 1049066/1049076 co-relation queries the response was YES. [2024-06-21 20:59:18,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 7827 events. 4884/7827 cut-off events. For 1049066/1049076 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 50611 event pairs, 1113 based on Foata normal form. 3/7821 useless extension candidates. Maximal degree in co-relation 77394. Up to 7349 conditions per place. [2024-06-21 20:59:18,289 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 587 selfloop transitions, 58 changer transitions 0/679 dead transitions. [2024-06-21 20:59:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 679 transitions, 11456 flow [2024-06-21 20:59:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 20:59:18,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 20:59:18,290 INFO L175 Difference]: Start difference. First operand has 397 places, 660 transitions, 10058 flow. Second operand 8 states and 145 transitions. [2024-06-21 20:59:18,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 679 transitions, 11456 flow [2024-06-21 20:59:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 679 transitions, 11380 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:24,262 INFO L231 Difference]: Finished difference. Result has 397 places, 663 transitions, 10167 flow [2024-06-21 20:59:24,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9982, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10167, PETRI_PLACES=397, PETRI_TRANSITIONS=663} [2024-06-21 20:59:24,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 20:59:24,262 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 663 transitions, 10167 flow [2024-06-21 20:59:24,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:24,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:24,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:24,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:59:24,263 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)] === [2024-06-21 20:59:24,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2041563224, now seen corresponding path program 3 times [2024-06-21 20:59:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:24,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638307139] [2024-06-21 20:59:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:24,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:25,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638307139] [2024-06-21 20:59:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638307139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:25,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:25,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666292204] [2024-06-21 20:59:25,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:25,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:25,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:25,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:25,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 663 transitions, 10167 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) [2024-06-21 20:59:25,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:25,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:25,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:27,477 INFO L124 PetriNetUnfolderBase]: 4892/7843 cut-off events. [2024-06-21 20:59:27,478 INFO L125 PetriNetUnfolderBase]: For 1059607/1059617 co-relation queries the response was YES. [2024-06-21 20:59:27,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77949 conditions, 7843 events. 4892/7843 cut-off events. For 1059607/1059617 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 50728 event pairs, 1109 based on Foata normal form. 2/7836 useless extension candidates. Maximal degree in co-relation 77762. Up to 7354 conditions per place. [2024-06-21 20:59:27,817 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 585 selfloop transitions, 64 changer transitions 0/683 dead transitions. [2024-06-21 20:59:27,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 683 transitions, 11581 flow [2024-06-21 20:59:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 20:59:27,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 20:59:27,821 INFO L175 Difference]: Start difference. First operand has 397 places, 663 transitions, 10167 flow. Second operand 9 states and 159 transitions. [2024-06-21 20:59:27,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 683 transitions, 11581 flow [2024-06-21 20:59:32,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 683 transitions, 11426 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 20:59:32,742 INFO L231 Difference]: Finished difference. Result has 400 places, 666 transitions, 10219 flow [2024-06-21 20:59:32,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10012, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10219, PETRI_PLACES=400, PETRI_TRANSITIONS=666} [2024-06-21 20:59:32,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-21 20:59:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 666 transitions, 10219 flow [2024-06-21 20:59:32,743 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) [2024-06-21 20:59:32,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:32,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:59:32,743 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)] === [2024-06-21 20:59:32,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 683961216, now seen corresponding path program 4 times [2024-06-21 20:59:32,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:32,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962915901] [2024-06-21 20:59:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:32,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962915901] [2024-06-21 20:59:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962915901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:33,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:33,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:59:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47295360] [2024-06-21 20:59:33,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:33,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:59:33,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:59:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:59:33,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:33,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 666 transitions, 10219 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) [2024-06-21 20:59:33,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:33,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:33,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:36,201 INFO L124 PetriNetUnfolderBase]: 4922/7883 cut-off events. [2024-06-21 20:59:36,201 INFO L125 PetriNetUnfolderBase]: For 1088576/1088586 co-relation queries the response was YES. [2024-06-21 20:59:36,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78649 conditions, 7883 events. 4922/7883 cut-off events. For 1088576/1088586 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50961 event pairs, 1111 based on Foata normal form. 2/7876 useless extension candidates. Maximal degree in co-relation 78461. Up to 7361 conditions per place. [2024-06-21 20:59:36,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 594 selfloop transitions, 70 changer transitions 0/698 dead transitions. [2024-06-21 20:59:36,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 698 transitions, 11995 flow [2024-06-21 20:59:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 20:59:36,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 20:59:36,321 INFO L175 Difference]: Start difference. First operand has 400 places, 666 transitions, 10219 flow. Second operand 9 states and 170 transitions. [2024-06-21 20:59:36,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 698 transitions, 11995 flow [2024-06-21 20:59:41,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 698 transitions, 11800 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 20:59:41,844 INFO L231 Difference]: Finished difference. Result has 401 places, 672 transitions, 10316 flow [2024-06-21 20:59:41,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10316, PETRI_PLACES=401, PETRI_TRANSITIONS=672} [2024-06-21 20:59:41,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-21 20:59:41,844 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 672 transitions, 10316 flow [2024-06-21 20:59:41,844 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) [2024-06-21 20:59:41,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:41,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:41,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:59:41,845 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)] === [2024-06-21 20:59:41,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:41,845 INFO L85 PathProgramCache]: Analyzing trace with hash 684138846, now seen corresponding path program 5 times [2024-06-21 20:59:41,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:41,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429915872] [2024-06-21 20:59:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429915872] [2024-06-21 20:59:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429915872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:42,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:42,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:59:42,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29337051] [2024-06-21 20:59:42,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:42,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:59:42,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:59:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:59:42,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 20:59:42,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 672 transitions, 10316 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:42,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:42,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 20:59:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:45,411 INFO L124 PetriNetUnfolderBase]: 4937/7906 cut-off events. [2024-06-21 20:59:45,411 INFO L125 PetriNetUnfolderBase]: For 1094960/1094970 co-relation queries the response was YES. [2024-06-21 20:59:45,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78792 conditions, 7906 events. 4937/7906 cut-off events. For 1094960/1094970 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 51147 event pairs, 1114 based on Foata normal form. 3/7900 useless extension candidates. Maximal degree in co-relation 78604. Up to 7408 conditions per place. [2024-06-21 20:59:45,538 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 598 selfloop transitions, 63 changer transitions 0/695 dead transitions. [2024-06-21 20:59:45,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 695 transitions, 12044 flow [2024-06-21 20:59:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:59:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:59:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 20:59:45,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 20:59:45,539 INFO L175 Difference]: Start difference. First operand has 401 places, 672 transitions, 10316 flow. Second operand 9 states and 162 transitions. [2024-06-21 20:59:45,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 695 transitions, 12044 flow [2024-06-21 20:59:51,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 695 transitions, 11918 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:59:51,045 INFO L231 Difference]: Finished difference. Result has 405 places, 675 transitions, 10397 flow [2024-06-21 20:59:51,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10190, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10397, PETRI_PLACES=405, PETRI_TRANSITIONS=675} [2024-06-21 20:59:51,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-21 20:59:51,046 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 675 transitions, 10397 flow [2024-06-21 20:59:51,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:51,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:59:51,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:59:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:59:51,046 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)] === [2024-06-21 20:59:51,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:59:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash 620751044, now seen corresponding path program 1 times [2024-06-21 20:59:51,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:59:51,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082416306] [2024-06-21 20:59:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:59:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:59:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:59:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:59:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:59:52,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082416306] [2024-06-21 20:59:52,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082416306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:59:52,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:59:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:59:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264214365] [2024-06-21 20:59:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:59:52,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:59:52,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:59:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:59:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:59:52,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 20:59:52,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 675 transitions, 10397 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:59:52,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:59:52,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 20:59:52,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:59:54,472 INFO L124 PetriNetUnfolderBase]: 5091/8063 cut-off events. [2024-06-21 20:59:54,472 INFO L125 PetriNetUnfolderBase]: For 1235252/1235252 co-relation queries the response was YES. [2024-06-21 20:59:54,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82394 conditions, 8063 events. 5091/8063 cut-off events. For 1235252/1235252 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51275 event pairs, 1173 based on Foata normal form. 1/8063 useless extension candidates. Maximal degree in co-relation 82204. Up to 7826 conditions per place. [2024-06-21 20:59:54,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 665 selfloop transitions, 23 changer transitions 0/692 dead transitions. [2024-06-21 20:59:54,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 692 transitions, 11929 flow [2024-06-21 20:59:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:59:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:59:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 20:59:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 20:59:54,594 INFO L175 Difference]: Start difference. First operand has 405 places, 675 transitions, 10397 flow. Second operand 8 states and 127 transitions. [2024-06-21 20:59:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 692 transitions, 11929 flow [2024-06-21 21:00:00,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 692 transitions, 11741 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:00,068 INFO L231 Difference]: Finished difference. Result has 406 places, 681 transitions, 10401 flow [2024-06-21 21:00:00,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10217, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10401, PETRI_PLACES=406, PETRI_TRANSITIONS=681} [2024-06-21 21:00:00,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-21 21:00:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 681 transitions, 10401 flow [2024-06-21 21:00:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:00,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:00:00,069 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)] === [2024-06-21 21:00:00,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1021472902, now seen corresponding path program 6 times [2024-06-21 21:00:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92435201] [2024-06-21 21:00:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92435201] [2024-06-21 21:00:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92435201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:01,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115720928] [2024-06-21 21:00:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:01,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 21:00:01,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 681 transitions, 10401 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:01,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:01,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 21:00:01,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:03,779 INFO L124 PetriNetUnfolderBase]: 4958/7936 cut-off events. [2024-06-21 21:00:03,779 INFO L125 PetriNetUnfolderBase]: For 1120874/1120884 co-relation queries the response was YES. [2024-06-21 21:00:03,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79126 conditions, 7936 events. 4958/7936 cut-off events. For 1120874/1120884 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51287 event pairs, 1115 based on Foata normal form. 3/7930 useless extension candidates. Maximal degree in co-relation 78935. Up to 7518 conditions per place. [2024-06-21 21:00:03,902 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 634 selfloop transitions, 30 changer transitions 0/698 dead transitions. [2024-06-21 21:00:03,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 698 transitions, 11845 flow [2024-06-21 21:00:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:00:03,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 21:00:03,903 INFO L175 Difference]: Start difference. First operand has 406 places, 681 transitions, 10401 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:00:03,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 698 transitions, 11845 flow [2024-06-21 21:00:10,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 698 transitions, 11733 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:10,103 INFO L231 Difference]: Finished difference. Result has 409 places, 684 transitions, 10436 flow [2024-06-21 21:00:10,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10289, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10436, PETRI_PLACES=409, PETRI_TRANSITIONS=684} [2024-06-21 21:00:10,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 21:00:10,104 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 684 transitions, 10436 flow [2024-06-21 21:00:10,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:10,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:10,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:10,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:00:10,104 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)] === [2024-06-21 21:00:10,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 793571752, now seen corresponding path program 7 times [2024-06-21 21:00:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:10,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167197136] [2024-06-21 21:00:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:10,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:10,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167197136] [2024-06-21 21:00:10,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167197136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:10,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:10,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782965541] [2024-06-21 21:00:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:11,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 21:00:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 684 transitions, 10436 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:11,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 21:00:11,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:13,585 INFO L124 PetriNetUnfolderBase]: 4952/7925 cut-off events. [2024-06-21 21:00:13,585 INFO L125 PetriNetUnfolderBase]: For 1117836/1117846 co-relation queries the response was YES. [2024-06-21 21:00:13,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78846 conditions, 7925 events. 4952/7925 cut-off events. For 1117836/1117846 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 51234 event pairs, 1114 based on Foata normal form. 3/7917 useless extension candidates. Maximal degree in co-relation 78654. Up to 7501 conditions per place. [2024-06-21 21:00:13,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 42 changer transitions 0/699 dead transitions. [2024-06-21 21:00:13,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 699 transitions, 11812 flow [2024-06-21 21:00:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:00:13,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:00:13,705 INFO L175 Difference]: Start difference. First operand has 409 places, 684 transitions, 10436 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:00:13,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 699 transitions, 11812 flow [2024-06-21 21:00:19,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 699 transitions, 11659 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 21:00:19,376 INFO L231 Difference]: Finished difference. Result has 411 places, 684 transitions, 10374 flow [2024-06-21 21:00:19,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10283, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10374, PETRI_PLACES=411, PETRI_TRANSITIONS=684} [2024-06-21 21:00:19,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-21 21:00:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 684 transitions, 10374 flow [2024-06-21 21:00:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:19,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:00:19,377 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)] === [2024-06-21 21:00:19,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 316633756, now seen corresponding path program 1 times [2024-06-21 21:00:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:19,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294516591] [2024-06-21 21:00:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:20,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294516591] [2024-06-21 21:00:20,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294516591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:20,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:20,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:20,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264751755] [2024-06-21 21:00:20,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:20,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:00:20,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 684 transitions, 10374 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:20,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:20,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:00:20,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:22,968 INFO L124 PetriNetUnfolderBase]: 5107/8090 cut-off events. [2024-06-21 21:00:22,968 INFO L125 PetriNetUnfolderBase]: For 1277071/1277073 co-relation queries the response was YES. [2024-06-21 21:00:23,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82416 conditions, 8090 events. 5107/8090 cut-off events. For 1277071/1277073 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 51445 event pairs, 993 based on Foata normal form. 4/8093 useless extension candidates. Maximal degree in co-relation 82223. Up to 7451 conditions per place. [2024-06-21 21:00:23,094 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 565 selfloop transitions, 148 changer transitions 0/717 dead transitions. [2024-06-21 21:00:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 717 transitions, 12360 flow [2024-06-21 21:00:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:00:23,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 21:00:23,095 INFO L175 Difference]: Start difference. First operand has 411 places, 684 transitions, 10374 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:00:23,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 717 transitions, 12360 flow [2024-06-21 21:00:29,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 717 transitions, 12241 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:00:29,473 INFO L231 Difference]: Finished difference. Result has 412 places, 691 transitions, 10763 flow [2024-06-21 21:00:29,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10255, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10763, PETRI_PLACES=412, PETRI_TRANSITIONS=691} [2024-06-21 21:00:29,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-21 21:00:29,474 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 691 transitions, 10763 flow [2024-06-21 21:00:29,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:29,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:29,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:29,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:00:29,475 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:00:29,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:29,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1350890892, now seen corresponding path program 2 times [2024-06-21 21:00:29,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:29,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397339244] [2024-06-21 21:00:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:30,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397339244] [2024-06-21 21:00:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397339244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035149647] [2024-06-21 21:00:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:30,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:00:30,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 691 transitions, 10763 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:30,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:00:30,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:32,843 INFO L124 PetriNetUnfolderBase]: 5117/8106 cut-off events. [2024-06-21 21:00:32,843 INFO L125 PetriNetUnfolderBase]: For 1295719/1295721 co-relation queries the response was YES. [2024-06-21 21:00:32,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83537 conditions, 8106 events. 5117/8106 cut-off events. For 1295719/1295721 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 51590 event pairs, 1016 based on Foata normal form. 3/8108 useless extension candidates. Maximal degree in co-relation 83343. Up to 7722 conditions per place. [2024-06-21 21:00:32,968 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 619 selfloop transitions, 95 changer transitions 0/718 dead transitions. [2024-06-21 21:00:32,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 718 transitions, 12392 flow [2024-06-21 21:00:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:00:32,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 21:00:32,970 INFO L175 Difference]: Start difference. First operand has 412 places, 691 transitions, 10763 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:00:32,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 718 transitions, 12392 flow [2024-06-21 21:00:38,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 718 transitions, 12140 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 21:00:38,226 INFO L231 Difference]: Finished difference. Result has 417 places, 697 transitions, 10848 flow [2024-06-21 21:00:38,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10529, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10848, PETRI_PLACES=417, PETRI_TRANSITIONS=697} [2024-06-21 21:00:38,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-21 21:00:38,227 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 697 transitions, 10848 flow [2024-06-21 21:00:38,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:38,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:38,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:00:38,227 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)] === [2024-06-21 21:00:38,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1350653742, now seen corresponding path program 3 times [2024-06-21 21:00:38,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:38,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497104000] [2024-06-21 21:00:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:39,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497104000] [2024-06-21 21:00:39,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497104000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:39,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:39,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:00:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995838932] [2024-06-21 21:00:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:00:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:00:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:00:39,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:00:39,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 697 transitions, 10848 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:39,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:39,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:00:39,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:41,897 INFO L124 PetriNetUnfolderBase]: 5122/8113 cut-off events. [2024-06-21 21:00:41,897 INFO L125 PetriNetUnfolderBase]: For 1317174/1317176 co-relation queries the response was YES. [2024-06-21 21:00:41,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83846 conditions, 8113 events. 5122/8113 cut-off events. For 1317174/1317176 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 51622 event pairs, 1018 based on Foata normal form. 3/8115 useless extension candidates. Maximal degree in co-relation 83650. Up to 7698 conditions per place. [2024-06-21 21:00:42,017 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 607 selfloop transitions, 110 changer transitions 0/721 dead transitions. [2024-06-21 21:00:42,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 721 transitions, 12446 flow [2024-06-21 21:00:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:00:42,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 21:00:42,018 INFO L175 Difference]: Start difference. First operand has 417 places, 697 transitions, 10848 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:00:42,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 721 transitions, 12446 flow [2024-06-21 21:00:47,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 721 transitions, 12173 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 21:00:47,363 INFO L231 Difference]: Finished difference. Result has 420 places, 700 transitions, 10910 flow [2024-06-21 21:00:47,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10575, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10910, PETRI_PLACES=420, PETRI_TRANSITIONS=700} [2024-06-21 21:00:47,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 21:00:47,363 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 700 transitions, 10910 flow [2024-06-21 21:00:47,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-06-21 21:00:47,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:00:47,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:00:47,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:00:47,364 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)] === [2024-06-21 21:00:47,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:00:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -765819733, now seen corresponding path program 1 times [2024-06-21 21:00:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:00:47,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475656716] [2024-06-21 21:00:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:00:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:00:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:00:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:00:48,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:00:48,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475656716] [2024-06-21 21:00:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475656716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:00:48,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:00:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:00:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124911632] [2024-06-21 21:00:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:00:48,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:00:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:00:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:00:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:00:48,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 21:00:48,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 700 transitions, 10910 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:00:48,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:00:48,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 21:00:48,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:00:50,796 INFO L124 PetriNetUnfolderBase]: 5132/8125 cut-off events. [2024-06-21 21:00:50,796 INFO L125 PetriNetUnfolderBase]: For 1345642/1345644 co-relation queries the response was YES. [2024-06-21 21:00:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84324 conditions, 8125 events. 5132/8125 cut-off events. For 1345642/1345644 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 51691 event pairs, 1026 based on Foata normal form. 4/8128 useless extension candidates. Maximal degree in co-relation 84127. Up to 7700 conditions per place. [2024-06-21 21:00:50,926 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 647 selfloop transitions, 76 changer transitions 0/727 dead transitions. [2024-06-21 21:00:50,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 727 transitions, 12592 flow [2024-06-21 21:00:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:00:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:00:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:00:50,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 21:00:50,927 INFO L175 Difference]: Start difference. First operand has 420 places, 700 transitions, 10910 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:00:50,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 727 transitions, 12592 flow