./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe030_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.opt_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 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:12:08,423 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:12:08,467 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:12:08,475 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:12:08,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:12:08,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:12:08,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:12:08,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:12:08,512 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:12:08,515 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:12:08,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:12:08,515 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:12:08,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:12:08,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:12:08,517 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:12:08,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:12:08,530 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:12:08,531 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:12:08,531 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:12:08,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:12:08,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:12:08,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:12:08,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:12:08,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:12:08,532 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:12:08,532 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:12:08,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:12:08,533 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:12:08,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:12:08,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:12:08,534 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:12:08,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:12:08,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:12:08,535 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:12:08,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:12:08,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:12:08,535 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:12:08,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:12:08,536 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:12:08,536 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:12:08,536 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:12:08,536 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:12:08,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:12:08,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:12:08,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:12:08,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:12:08,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:12:08,763 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:12:08,763 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:12:08,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_power.opt_pso.opt_rmo.opt.i [2024-06-28 02:12:09,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:12:10,082 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:12:10,083 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.opt_pso.opt_rmo.opt.i [2024-06-28 02:12:10,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162b82959/3094a8a308d241ba9737016cfefadcaf/FLAG329ff88de [2024-06-28 02:12:10,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162b82959/3094a8a308d241ba9737016cfefadcaf [2024-06-28 02:12:10,109 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:12:10,109 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:12:10,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe030_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-28 02:12:10,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:12:10,263 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:12:10,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:12:10,265 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:12:10,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:12:10,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:12:10" (1/2) ... [2024-06-28 02:12:10,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d7a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:12:10, skipping insertion in model container [2024-06-28 02:12:10,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:12:10" (1/2) ... [2024-06-28 02:12:10,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e76a9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:12:10, skipping insertion in model container [2024-06-28 02:12:10,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:12:10" (2/2) ... [2024-06-28 02:12:10,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d7a60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10, skipping insertion in model container [2024-06-28 02:12:10,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:12:10" (2/2) ... [2024-06-28 02:12:10,277 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:12:10,346 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:12:10,348 INFO L97 edCorrectnessWitness]: Location invariant before [L814-L814] (((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 02:12:10,348 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 02:12:10,348 INFO L97 edCorrectnessWitness]: Location invariant before [L817-L817] (((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-28 02:12:10,348 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:12:10,348 INFO L106 edCorrectnessWitness]: ghost_update [L812-L812] multithreaded = 1; [2024-06-28 02:12:10,386 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:12:10,508 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.opt_pso.opt_rmo.opt.i[967,980] [2024-06-28 02:12:10,675 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:12:10,682 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 02:12:10,716 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_power.opt_pso.opt_rmo.opt.i[967,980] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:12:10,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:12:10,815 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:12:10,815 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10 WrapperNode [2024-06-28 02:12:10,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:12:10,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:12:10,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:12:10,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:12:10,822 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 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,832 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 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,859 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 138 [2024-06-28 02:12:10,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:12:10,860 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:12:10,860 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:12:10,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:12:10,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,876 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,888 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]. [2024-06-28 02:12:10,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:12:10,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:12:10,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:12:10,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:12:10,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (1/1) ... [2024-06-28 02:12:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:12:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:12:10,937 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) [2024-06-28 02:12:10,945 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 [2024-06-28 02:12:10,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:12:10,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:12:10,986 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:12:10,986 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:12:10,986 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:12:10,986 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:12:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:12:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:12:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:12:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:12:10,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:12:10,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:12:10,990 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:12:11,132 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:12:11,136 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:12:11,498 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:12:11,499 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:12:11,622 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:12:11,623 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:12:11,623 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:12:11 BoogieIcfgContainer [2024-06-28 02:12:11,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:12:11,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:12:11,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:12:11,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:12:11,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:12:10" (1/4) ... [2024-06-28 02:12:11,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f760df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:12:11, skipping insertion in model container [2024-06-28 02:12:11,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:12:10" (2/4) ... [2024-06-28 02:12:11,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f760df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:12:11, skipping insertion in model container [2024-06-28 02:12:11,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:12:10" (3/4) ... [2024-06-28 02:12:11,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f760df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:12:11, skipping insertion in model container [2024-06-28 02:12:11,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:12:11" (4/4) ... [2024-06-28 02:12:11,633 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_power.opt_pso.opt_rmo.opt.i [2024-06-28 02:12:11,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:12:11,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-28 02:12:11,646 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:12:11,689 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:12:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 02:12:11,748 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-28 02:12:11,748 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:12:11,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-28 02:12:11,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 02:12:11,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 43 transitions, 95 flow [2024-06-28 02:12:11,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:12:11,766 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;@421193ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:12:11,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-28 02:12:11,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:12:11,771 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:12:11,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:12:11,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:11,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:12:11,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:11,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash 341188796, now seen corresponding path program 1 times [2024-06-28 02:12:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555930127] [2024-06-28 02:12:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:12,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555930127] [2024-06-28 02:12:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555930127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:12,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:12:12,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038866384] [2024-06-28 02:12:12,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:12:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:12:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:12:12,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-28 02:12:12,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:12,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:12,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-28 02:12:12,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:13,223 INFO L124 PetriNetUnfolderBase]: 2298/3591 cut-off events. [2024-06-28 02:12:13,223 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 02:12:13,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6998 conditions, 3591 events. 2298/3591 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21182 event pairs, 1230 based on Foata normal form. 121/3522 useless extension candidates. Maximal degree in co-relation 6986. Up to 3339 conditions per place. [2024-06-28 02:12:13,244 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-28 02:12:13,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 221 flow [2024-06-28 02:12:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:12:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:12:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-28 02:12:13,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-06-28 02:12:13,257 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 95 flow. Second operand 3 states and 98 transitions. [2024-06-28 02:12:13,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 221 flow [2024-06-28 02:12:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 216 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:13,269 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 127 flow [2024-06-28 02:12:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 02:12:13,274 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-06-28 02:12:13,274 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 127 flow [2024-06-28 02:12:13,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:13,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:13,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:12:13,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1465722885, now seen corresponding path program 1 times [2024-06-28 02:12:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:13,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434647710] [2024-06-28 02:12:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:13,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:13,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434647710] [2024-06-28 02:12:13,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434647710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:13,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:12:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360814631] [2024-06-28 02:12:13,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:12:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:12:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:12:13,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-28 02:12:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:13,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-28 02:12:13,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:14,224 INFO L124 PetriNetUnfolderBase]: 2291/3647 cut-off events. [2024-06-28 02:12:14,225 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-06-28 02:12:14,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8000 conditions, 3647 events. 2291/3647 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22187 event pairs, 1065 based on Foata normal form. 3/3454 useless extension candidates. Maximal degree in co-relation 7988. Up to 3304 conditions per place. [2024-06-28 02:12:14,246 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 52 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-06-28 02:12:14,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 319 flow [2024-06-28 02:12:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:12:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:12:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-28 02:12:14,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-28 02:12:14,250 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 127 flow. Second operand 4 states and 128 transitions. [2024-06-28 02:12:14,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 319 flow [2024-06-28 02:12:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:14,254 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 173 flow [2024-06-28 02:12:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-28 02:12:14,255 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-28 02:12:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 173 flow [2024-06-28 02:12:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:14,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:14,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:14,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:12:14,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:14,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1807229947, now seen corresponding path program 1 times [2024-06-28 02:12:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:14,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853087366] [2024-06-28 02:12:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:14,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853087366] [2024-06-28 02:12:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853087366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:14,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:12:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863792176] [2024-06-28 02:12:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:12:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:12:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:12:14,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-06-28 02:12:14,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2024-06-28 02:12:14,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:14,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-06-28 02:12:14,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:15,319 INFO L124 PetriNetUnfolderBase]: 2342/3678 cut-off events. [2024-06-28 02:12:15,319 INFO L125 PetriNetUnfolderBase]: For 1386/1386 co-relation queries the response was YES. [2024-06-28 02:12:15,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9074 conditions, 3678 events. 2342/3678 cut-off events. For 1386/1386 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21853 event pairs, 407 based on Foata normal form. 10/3504 useless extension candidates. Maximal degree in co-relation 9060. Up to 3173 conditions per place. [2024-06-28 02:12:15,337 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 68 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-06-28 02:12:15,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 501 flow [2024-06-28 02:12:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:12:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:12:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-28 02:12:15,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7130434782608696 [2024-06-28 02:12:15,339 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 173 flow. Second operand 5 states and 164 transitions. [2024-06-28 02:12:15,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 501 flow [2024-06-28 02:12:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 482 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:15,342 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 282 flow [2024-06-28 02:12:15,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-28 02:12:15,352 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-28 02:12:15,352 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 282 flow [2024-06-28 02:12:15,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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) [2024-06-28 02:12:15,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:15,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:15,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:12:15,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash 587261286, now seen corresponding path program 1 times [2024-06-28 02:12:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:15,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264314570] [2024-06-28 02:12:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:15,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264314570] [2024-06-28 02:12:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264314570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:15,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:15,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:12:15,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48111886] [2024-06-28 02:12:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:15,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:12:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:12:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:12:15,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:15,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-28 02:12:15,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:15,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:15,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:16,294 INFO L124 PetriNetUnfolderBase]: 2629/4104 cut-off events. [2024-06-28 02:12:16,294 INFO L125 PetriNetUnfolderBase]: For 3507/3507 co-relation queries the response was YES. [2024-06-28 02:12:16,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11881 conditions, 4104 events. 2629/4104 cut-off events. For 3507/3507 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24305 event pairs, 749 based on Foata normal form. 2/3906 useless extension candidates. Maximal degree in co-relation 11863. Up to 3783 conditions per place. [2024-06-28 02:12:16,317 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-28 02:12:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 480 flow [2024-06-28 02:12:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:12:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:12:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-28 02:12:16,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782608695652174 [2024-06-28 02:12:16,319 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 282 flow. Second operand 5 states and 133 transitions. [2024-06-28 02:12:16,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 480 flow [2024-06-28 02:12:16,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 464 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 02:12:16,323 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 295 flow [2024-06-28 02:12:16,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-28 02:12:16,324 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-06-28 02:12:16,324 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 295 flow [2024-06-28 02:12:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-28 02:12:16,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:16,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:16,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:12:16,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:16,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1024857552, now seen corresponding path program 1 times [2024-06-28 02:12:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:16,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836363748] [2024-06-28 02:12:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:16,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:16,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:16,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836363748] [2024-06-28 02:12:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836363748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:16,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:16,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884030572] [2024-06-28 02:12:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:16,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:16,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:16,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:16,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:16,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:17,420 INFO L124 PetriNetUnfolderBase]: 2613/4364 cut-off events. [2024-06-28 02:12:17,420 INFO L125 PetriNetUnfolderBase]: For 4473/4473 co-relation queries the response was YES. [2024-06-28 02:12:17,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12120 conditions, 4364 events. 2613/4364 cut-off events. For 4473/4473 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28220 event pairs, 967 based on Foata normal form. 6/4054 useless extension candidates. Maximal degree in co-relation 12098. Up to 3725 conditions per place. [2024-06-28 02:12:17,451 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 74 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-06-28 02:12:17,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 639 flow [2024-06-28 02:12:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-28 02:12:17,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-28 02:12:17,454 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 295 flow. Second operand 6 states and 156 transitions. [2024-06-28 02:12:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 639 flow [2024-06-28 02:12:17,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 586 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:17,463 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 423 flow [2024-06-28 02:12:17,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-28 02:12:17,466 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2024-06-28 02:12:17,466 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 423 flow [2024-06-28 02:12:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:17,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:17,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:12:17,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:17,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:17,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1012927871, now seen corresponding path program 1 times [2024-06-28 02:12:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666333694] [2024-06-28 02:12:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666333694] [2024-06-28 02:12:17,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666333694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:12:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651028918] [2024-06-28 02:12:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:12:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:12:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:12:17,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-06-28 02:12:17,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:17,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:17,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-06-28 02:12:17,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:17,745 INFO L124 PetriNetUnfolderBase]: 964/2007 cut-off events. [2024-06-28 02:12:17,745 INFO L125 PetriNetUnfolderBase]: For 1886/2023 co-relation queries the response was YES. [2024-06-28 02:12:17,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2007 events. 964/2007 cut-off events. For 1886/2023 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14791 event pairs, 157 based on Foata normal form. 13/1923 useless extension candidates. Maximal degree in co-relation 4751. Up to 1144 conditions per place. [2024-06-28 02:12:17,757 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 30 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-28 02:12:17,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 447 flow [2024-06-28 02:12:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:12:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:12:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-28 02:12:17,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2024-06-28 02:12:17,759 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 423 flow. Second operand 3 states and 102 transitions. [2024-06-28 02:12:17,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 447 flow [2024-06-28 02:12:17,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 435 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:17,762 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 355 flow [2024-06-28 02:12:17,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=355, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-28 02:12:17,762 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2024-06-28 02:12:17,763 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 355 flow [2024-06-28 02:12:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:17,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:17,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:12:17,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1370853115, now seen corresponding path program 1 times [2024-06-28 02:12:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:17,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724233791] [2024-06-28 02:12:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:18,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724233791] [2024-06-28 02:12:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724233791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:18,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:18,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943136871] [2024-06-28 02:12:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:18,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:18,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 355 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:18,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:18,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:18,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:18,779 INFO L124 PetriNetUnfolderBase]: 2442/3972 cut-off events. [2024-06-28 02:12:18,780 INFO L125 PetriNetUnfolderBase]: For 6750/6756 co-relation queries the response was YES. [2024-06-28 02:12:18,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11985 conditions, 3972 events. 2442/3972 cut-off events. For 6750/6756 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24621 event pairs, 457 based on Foata normal form. 12/3938 useless extension candidates. Maximal degree in co-relation 11960. Up to 3092 conditions per place. [2024-06-28 02:12:18,800 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 81 selfloop transitions, 30 changer transitions 5/127 dead transitions. [2024-06-28 02:12:18,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 820 flow [2024-06-28 02:12:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 02:12:18,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-28 02:12:18,802 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 355 flow. Second operand 7 states and 194 transitions. [2024-06-28 02:12:18,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 820 flow [2024-06-28 02:12:18,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 792 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:18,814 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 506 flow [2024-06-28 02:12:18,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-28 02:12:18,815 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-28 02:12:18,815 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 506 flow [2024-06-28 02:12:18,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:18,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:18,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:18,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:12:18,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:18,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash 113066567, now seen corresponding path program 2 times [2024-06-28 02:12:18,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:18,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126934416] [2024-06-28 02:12:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:18,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:19,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126934416] [2024-06-28 02:12:19,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126934416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:19,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:19,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:19,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967663530] [2024-06-28 02:12:19,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:19,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:19,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:19,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:19,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:19,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:19,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:19,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:19,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:19,989 INFO L124 PetriNetUnfolderBase]: 2208/3615 cut-off events. [2024-06-28 02:12:19,989 INFO L125 PetriNetUnfolderBase]: For 7180/7186 co-relation queries the response was YES. [2024-06-28 02:12:19,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11824 conditions, 3615 events. 2208/3615 cut-off events. For 7180/7186 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22218 event pairs, 418 based on Foata normal form. 15/3580 useless extension candidates. Maximal degree in co-relation 11795. Up to 2774 conditions per place. [2024-06-28 02:12:20,010 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 72 selfloop transitions, 34 changer transitions 0/117 dead transitions. [2024-06-28 02:12:20,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 892 flow [2024-06-28 02:12:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-28 02:12:20,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-06-28 02:12:20,012 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 506 flow. Second operand 6 states and 159 transitions. [2024-06-28 02:12:20,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 892 flow [2024-06-28 02:12:20,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 850 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:20,024 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 600 flow [2024-06-28 02:12:20,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=600, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2024-06-28 02:12:20,026 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-28 02:12:20,026 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 600 flow [2024-06-28 02:12:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:20,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:20,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:20,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:12:20,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:20,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1717425285, now seen corresponding path program 3 times [2024-06-28 02:12:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980937704] [2024-06-28 02:12:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:20,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:20,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980937704] [2024-06-28 02:12:20,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980937704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:20,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:20,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673319362] [2024-06-28 02:12:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:20,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:20,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 600 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:20,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:20,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:20,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:21,043 INFO L124 PetriNetUnfolderBase]: 2193/3573 cut-off events. [2024-06-28 02:12:21,043 INFO L125 PetriNetUnfolderBase]: For 8668/8668 co-relation queries the response was YES. [2024-06-28 02:12:21,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12015 conditions, 3573 events. 2193/3573 cut-off events. For 8668/8668 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21804 event pairs, 442 based on Foata normal form. 3/3519 useless extension candidates. Maximal degree in co-relation 11985. Up to 2759 conditions per place. [2024-06-28 02:12:21,066 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 69 selfloop transitions, 35 changer transitions 0/115 dead transitions. [2024-06-28 02:12:21,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 910 flow [2024-06-28 02:12:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-28 02:12:21,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615942028985508 [2024-06-28 02:12:21,067 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 600 flow. Second operand 6 states and 155 transitions. [2024-06-28 02:12:21,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 910 flow [2024-06-28 02:12:21,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 115 transitions, 854 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:21,080 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 625 flow [2024-06-28 02:12:21,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=625, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-28 02:12:21,081 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-06-28 02:12:21,081 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 625 flow [2024-06-28 02:12:21,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:21,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:21,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:21,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:12:21,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:21,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1433921977, now seen corresponding path program 1 times [2024-06-28 02:12:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:21,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784970053] [2024-06-28 02:12:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:21,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:21,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:21,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784970053] [2024-06-28 02:12:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784970053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:21,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:21,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:21,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690085851] [2024-06-28 02:12:21,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:21,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:21,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:21,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 625 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:21,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:21,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:21,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:22,329 INFO L124 PetriNetUnfolderBase]: 2334/4011 cut-off events. [2024-06-28 02:12:22,329 INFO L125 PetriNetUnfolderBase]: For 10534/10540 co-relation queries the response was YES. [2024-06-28 02:12:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 4011 events. 2334/4011 cut-off events. For 10534/10540 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26115 event pairs, 276 based on Foata normal form. 20/3899 useless extension candidates. Maximal degree in co-relation 12951. Up to 2523 conditions per place. [2024-06-28 02:12:22,351 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 107 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-28 02:12:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 153 transitions, 1354 flow [2024-06-28 02:12:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:12:22,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-06-28 02:12:22,353 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 625 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:12:22,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 153 transitions, 1354 flow [2024-06-28 02:12:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 1158 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:12:22,366 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 855 flow [2024-06-28 02:12:22,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=83, PETRI_TRANSITIONS=107} [2024-06-28 02:12:22,367 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2024-06-28 02:12:22,367 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 855 flow [2024-06-28 02:12:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:22,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:22,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:22,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:12:22,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:22,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:22,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1700577943, now seen corresponding path program 2 times [2024-06-28 02:12:22,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:22,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636913625] [2024-06-28 02:12:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636913625] [2024-06-28 02:12:22,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636913625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:22,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654201808] [2024-06-28 02:12:22,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:22,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:22,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 107 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:22,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:22,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:22,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:23,603 INFO L124 PetriNetUnfolderBase]: 2389/4078 cut-off events. [2024-06-28 02:12:23,603 INFO L125 PetriNetUnfolderBase]: For 11175/11175 co-relation queries the response was YES. [2024-06-28 02:12:23,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 4078 events. 2389/4078 cut-off events. For 11175/11175 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26394 event pairs, 293 based on Foata normal form. 6/3949 useless extension candidates. Maximal degree in co-relation 14042. Up to 2541 conditions per place. [2024-06-28 02:12:23,629 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 109 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-28 02:12:23,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1423 flow [2024-06-28 02:12:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:12:23,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:12:23,631 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 855 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:12:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1423 flow [2024-06-28 02:12:23,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 161 transitions, 1377 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:23,652 INFO L231 Difference]: Finished difference. Result has 88 places, 116 transitions, 997 flow [2024-06-28 02:12:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=997, PETRI_PLACES=88, PETRI_TRANSITIONS=116} [2024-06-28 02:12:23,653 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-06-28 02:12:23,653 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 116 transitions, 997 flow [2024-06-28 02:12:23,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:23,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:23,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:12:23,654 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -785253919, now seen corresponding path program 3 times [2024-06-28 02:12:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441821260] [2024-06-28 02:12:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441821260] [2024-06-28 02:12:24,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441821260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:24,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:24,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:24,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290273965] [2024-06-28 02:12:24,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:24,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:24,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:24,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:24,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 997 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:24,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:24,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:24,968 INFO L124 PetriNetUnfolderBase]: 2376/4064 cut-off events. [2024-06-28 02:12:24,969 INFO L125 PetriNetUnfolderBase]: For 13008/13008 co-relation queries the response was YES. [2024-06-28 02:12:24,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14426 conditions, 4064 events. 2376/4064 cut-off events. For 13008/13008 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26385 event pairs, 273 based on Foata normal form. 6/3942 useless extension candidates. Maximal degree in co-relation 14390. Up to 2538 conditions per place. [2024-06-28 02:12:24,994 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 102 selfloop transitions, 47 changer transitions 0/160 dead transitions. [2024-06-28 02:12:24,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 160 transitions, 1467 flow [2024-06-28 02:12:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-28 02:12:24,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-06-28 02:12:24,996 INFO L175 Difference]: Start difference. First operand has 88 places, 116 transitions, 997 flow. Second operand 8 states and 198 transitions. [2024-06-28 02:12:24,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 160 transitions, 1467 flow [2024-06-28 02:12:25,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1421 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:25,020 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 1061 flow [2024-06-28 02:12:25,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1061, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-28 02:12:25,021 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-06-28 02:12:25,021 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 1061 flow [2024-06-28 02:12:25,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:25,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:25,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:25,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:12:25,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:25,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1533925318, now seen corresponding path program 1 times [2024-06-28 02:12:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423468105] [2024-06-28 02:12:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423468105] [2024-06-28 02:12:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423468105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:25,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:12:25,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700318581] [2024-06-28 02:12:25,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:25,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:12:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:12:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:12:25,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:25,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 1061 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-28 02:12:25,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:25,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:25,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:26,026 INFO L124 PetriNetUnfolderBase]: 2381/4040 cut-off events. [2024-06-28 02:12:26,026 INFO L125 PetriNetUnfolderBase]: For 14751/14751 co-relation queries the response was YES. [2024-06-28 02:12:26,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14836 conditions, 4040 events. 2381/4040 cut-off events. For 14751/14751 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25851 event pairs, 890 based on Foata normal form. 1/3889 useless extension candidates. Maximal degree in co-relation 14797. Up to 3469 conditions per place. [2024-06-28 02:12:26,048 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 118 selfloop transitions, 9 changer transitions 0/138 dead transitions. [2024-06-28 02:12:26,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 1415 flow [2024-06-28 02:12:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:12:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:12:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:12:26,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260869565217391 [2024-06-28 02:12:26,050 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 1061 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:12:26,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 1415 flow [2024-06-28 02:12:26,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 1342 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 02:12:26,068 INFO L231 Difference]: Finished difference. Result has 95 places, 124 transitions, 1091 flow [2024-06-28 02:12:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1091, PETRI_PLACES=95, PETRI_TRANSITIONS=124} [2024-06-28 02:12:26,069 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-06-28 02:12:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 124 transitions, 1091 flow [2024-06-28 02:12:26,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-28 02:12:26,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:26,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:26,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:12:26,070 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:26,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1144292951, now seen corresponding path program 1 times [2024-06-28 02:12:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:26,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759902867] [2024-06-28 02:12:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:26,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:26,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:26,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759902867] [2024-06-28 02:12:26,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759902867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:26,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098041676] [2024-06-28 02:12:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:26,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:26,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 124 transitions, 1091 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:26,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:27,293 INFO L124 PetriNetUnfolderBase]: 2467/4260 cut-off events. [2024-06-28 02:12:27,293 INFO L125 PetriNetUnfolderBase]: For 16367/16377 co-relation queries the response was YES. [2024-06-28 02:12:27,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15665 conditions, 4260 events. 2467/4260 cut-off events. For 16367/16377 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28092 event pairs, 246 based on Foata normal form. 19/4136 useless extension candidates. Maximal degree in co-relation 15625. Up to 2581 conditions per place. [2024-06-28 02:12:27,318 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 117 selfloop transitions, 46 changer transitions 0/174 dead transitions. [2024-06-28 02:12:27,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 174 transitions, 1622 flow [2024-06-28 02:12:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 02:12:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-06-28 02:12:27,323 INFO L175 Difference]: Start difference. First operand has 95 places, 124 transitions, 1091 flow. Second operand 7 states and 187 transitions. [2024-06-28 02:12:27,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 174 transitions, 1622 flow [2024-06-28 02:12:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 174 transitions, 1601 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:27,349 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1270 flow [2024-06-28 02:12:27,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1270, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2024-06-28 02:12:27,350 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-28 02:12:27,351 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1270 flow [2024-06-28 02:12:27,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:27,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:27,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:27,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:12:27,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:27,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 27988073, now seen corresponding path program 2 times [2024-06-28 02:12:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:27,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708693955] [2024-06-28 02:12:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:27,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708693955] [2024-06-28 02:12:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708693955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:27,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616759489] [2024-06-28 02:12:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:27,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1270 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:28,601 INFO L124 PetriNetUnfolderBase]: 2553/4416 cut-off events. [2024-06-28 02:12:28,602 INFO L125 PetriNetUnfolderBase]: For 21014/21018 co-relation queries the response was YES. [2024-06-28 02:12:28,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17356 conditions, 4416 events. 2553/4416 cut-off events. For 21014/21018 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29449 event pairs, 298 based on Foata normal form. 13/4275 useless extension candidates. Maximal degree in co-relation 17312. Up to 2617 conditions per place. [2024-06-28 02:12:28,632 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 114 selfloop transitions, 46 changer transitions 0/171 dead transitions. [2024-06-28 02:12:28,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1750 flow [2024-06-28 02:12:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:12:28,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-06-28 02:12:28,633 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1270 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:12:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1750 flow [2024-06-28 02:12:28,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1696 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:28,662 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1344 flow [2024-06-28 02:12:28,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1344, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-28 02:12:28,663 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-06-28 02:12:28,663 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1344 flow [2024-06-28 02:12:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:28,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:28,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:28,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:12:28,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:28,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:28,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1185661805, now seen corresponding path program 3 times [2024-06-28 02:12:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946168346] [2024-06-28 02:12:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:29,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946168346] [2024-06-28 02:12:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946168346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453756201] [2024-06-28 02:12:29,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:29,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:29,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1344 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:29,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:29,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:29,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:30,018 INFO L124 PetriNetUnfolderBase]: 2533/4389 cut-off events. [2024-06-28 02:12:30,018 INFO L125 PetriNetUnfolderBase]: For 22812/22816 co-relation queries the response was YES. [2024-06-28 02:12:30,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17304 conditions, 4389 events. 2533/4389 cut-off events. For 22812/22816 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29323 event pairs, 340 based on Foata normal form. 16/4255 useless extension candidates. Maximal degree in co-relation 17259. Up to 2611 conditions per place. [2024-06-28 02:12:30,045 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 111 selfloop transitions, 44 changer transitions 0/166 dead transitions. [2024-06-28 02:12:30,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 166 transitions, 1735 flow [2024-06-28 02:12:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:12:30,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-06-28 02:12:30,047 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1344 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:12:30,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 166 transitions, 1735 flow [2024-06-28 02:12:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1659 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:30,079 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1346 flow [2024-06-28 02:12:30,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1346, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-28 02:12:30,080 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 56 predicate places. [2024-06-28 02:12:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1346 flow [2024-06-28 02:12:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:30,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:30,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:12:30,081 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:30,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash -307043535, now seen corresponding path program 1 times [2024-06-28 02:12:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714609618] [2024-06-28 02:12:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714609618] [2024-06-28 02:12:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714609618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939316450] [2024-06-28 02:12:30,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:30,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:30,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1346 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:30,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:30,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:30,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:31,170 INFO L124 PetriNetUnfolderBase]: 2576/4444 cut-off events. [2024-06-28 02:12:31,170 INFO L125 PetriNetUnfolderBase]: For 22969/22985 co-relation queries the response was YES. [2024-06-28 02:12:31,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17503 conditions, 4444 events. 2576/4444 cut-off events. For 22969/22985 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29319 event pairs, 907 based on Foata normal form. 14/4322 useless extension candidates. Maximal degree in co-relation 17457. Up to 3675 conditions per place. [2024-06-28 02:12:31,198 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 138 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-06-28 02:12:31,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 170 transitions, 1912 flow [2024-06-28 02:12:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-28 02:12:31,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-06-28 02:12:31,200 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1346 flow. Second operand 6 states and 148 transitions. [2024-06-28 02:12:31,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 170 transitions, 1912 flow [2024-06-28 02:12:31,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 170 transitions, 1850 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:31,239 INFO L231 Difference]: Finished difference. Result has 112 places, 146 transitions, 1515 flow [2024-06-28 02:12:31,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=112, PETRI_TRANSITIONS=146} [2024-06-28 02:12:31,239 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-28 02:12:31,240 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 146 transitions, 1515 flow [2024-06-28 02:12:31,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:31,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:31,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:31,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:12:31,240 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:31,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1016051495, now seen corresponding path program 1 times [2024-06-28 02:12:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220469349] [2024-06-28 02:12:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:31,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:31,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220469349] [2024-06-28 02:12:31,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220469349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:31,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:31,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216747601] [2024-06-28 02:12:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:31,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:31,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:31,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:31,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 146 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:31,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:31,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:32,417 INFO L124 PetriNetUnfolderBase]: 2610/4502 cut-off events. [2024-06-28 02:12:32,417 INFO L125 PetriNetUnfolderBase]: For 27047/27047 co-relation queries the response was YES. [2024-06-28 02:12:32,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18581 conditions, 4502 events. 2610/4502 cut-off events. For 27047/27047 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29920 event pairs, 1088 based on Foata normal form. 1/4365 useless extension candidates. Maximal degree in co-relation 18531. Up to 3776 conditions per place. [2024-06-28 02:12:32,447 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 145 selfloop transitions, 22 changer transitions 0/178 dead transitions. [2024-06-28 02:12:32,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 178 transitions, 2058 flow [2024-06-28 02:12:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:12:32,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-06-28 02:12:32,449 INFO L175 Difference]: Start difference. First operand has 112 places, 146 transitions, 1515 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:12:32,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 178 transitions, 2058 flow [2024-06-28 02:12:32,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 178 transitions, 2024 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:32,490 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1691 flow [2024-06-28 02:12:32,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-28 02:12:32,491 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 68 predicate places. [2024-06-28 02:12:32,491 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1691 flow [2024-06-28 02:12:32,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:32,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:32,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:12:32,492 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:32,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1475528587, now seen corresponding path program 2 times [2024-06-28 02:12:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:32,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178559634] [2024-06-28 02:12:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:32,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178559634] [2024-06-28 02:12:32,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178559634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:32,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:32,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012055374] [2024-06-28 02:12:32,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:32,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:33,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:33,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1691 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:33,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:33,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:33,646 INFO L124 PetriNetUnfolderBase]: 2650/4550 cut-off events. [2024-06-28 02:12:33,647 INFO L125 PetriNetUnfolderBase]: For 29137/29137 co-relation queries the response was YES. [2024-06-28 02:12:33,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19062 conditions, 4550 events. 2650/4550 cut-off events. For 29137/29137 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30048 event pairs, 1121 based on Foata normal form. 1/4417 useless extension candidates. Maximal degree in co-relation 19007. Up to 3824 conditions per place. [2024-06-28 02:12:33,732 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 153 selfloop transitions, 29 changer transitions 0/193 dead transitions. [2024-06-28 02:12:33,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 193 transitions, 2249 flow [2024-06-28 02:12:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:12:33,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-28 02:12:33,734 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1691 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:12:33,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 193 transitions, 2249 flow [2024-06-28 02:12:33,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 193 transitions, 2177 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:33,780 INFO L231 Difference]: Finished difference. Result has 125 places, 166 transitions, 1825 flow [2024-06-28 02:12:33,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1825, PETRI_PLACES=125, PETRI_TRANSITIONS=166} [2024-06-28 02:12:33,780 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2024-06-28 02:12:33,780 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 166 transitions, 1825 flow [2024-06-28 02:12:33,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:33,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:33,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:12:33,781 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:33,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:33,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2108656791, now seen corresponding path program 3 times [2024-06-28 02:12:33,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:33,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328856344] [2024-06-28 02:12:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:34,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:34,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328856344] [2024-06-28 02:12:34,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328856344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:34,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:34,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615097528] [2024-06-28 02:12:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:34,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:34,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 166 transitions, 1825 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:34,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:34,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:34,951 INFO L124 PetriNetUnfolderBase]: 2642/4546 cut-off events. [2024-06-28 02:12:34,951 INFO L125 PetriNetUnfolderBase]: For 30631/30635 co-relation queries the response was YES. [2024-06-28 02:12:34,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19117 conditions, 4546 events. 2642/4546 cut-off events. For 30631/30635 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30131 event pairs, 1083 based on Foata normal form. 6/4414 useless extension candidates. Maximal degree in co-relation 19060. Up to 3720 conditions per place. [2024-06-28 02:12:34,979 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 141 selfloop transitions, 34 changer transitions 0/186 dead transitions. [2024-06-28 02:12:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 186 transitions, 2239 flow [2024-06-28 02:12:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-28 02:12:34,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-06-28 02:12:34,981 INFO L175 Difference]: Start difference. First operand has 125 places, 166 transitions, 1825 flow. Second operand 6 states and 147 transitions. [2024-06-28 02:12:34,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 186 transitions, 2239 flow [2024-06-28 02:12:35,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 186 transitions, 2182 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:35,035 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1844 flow [2024-06-28 02:12:35,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1844, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-28 02:12:35,035 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 76 predicate places. [2024-06-28 02:12:35,035 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1844 flow [2024-06-28 02:12:35,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:35,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:35,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:12:35,036 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:35,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1674057191, now seen corresponding path program 1 times [2024-06-28 02:12:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:35,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465544933] [2024-06-28 02:12:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465544933] [2024-06-28 02:12:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465544933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:35,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049716195] [2024-06-28 02:12:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:35,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:35,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1844 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:35,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:35,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:35,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:36,141 INFO L124 PetriNetUnfolderBase]: 2662/4553 cut-off events. [2024-06-28 02:12:36,141 INFO L125 PetriNetUnfolderBase]: For 32441/32441 co-relation queries the response was YES. [2024-06-28 02:12:36,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19309 conditions, 4553 events. 2662/4553 cut-off events. For 32441/32441 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30059 event pairs, 1253 based on Foata normal form. 1/4418 useless extension candidates. Maximal degree in co-relation 19251. Up to 3867 conditions per place. [2024-06-28 02:12:36,173 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 168 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2024-06-28 02:12:36,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 193 transitions, 2341 flow [2024-06-28 02:12:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:12:36,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-28 02:12:36,175 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1844 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:12:36,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 193 transitions, 2341 flow [2024-06-28 02:12:36,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 2243 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:12:36,227 INFO L231 Difference]: Finished difference. Result has 130 places, 173 transitions, 1870 flow [2024-06-28 02:12:36,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1870, PETRI_PLACES=130, PETRI_TRANSITIONS=173} [2024-06-28 02:12:36,228 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 78 predicate places. [2024-06-28 02:12:36,228 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 173 transitions, 1870 flow [2024-06-28 02:12:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:36,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:36,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:36,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:12:36,229 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:36,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -928422823, now seen corresponding path program 2 times [2024-06-28 02:12:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713982493] [2024-06-28 02:12:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:36,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:36,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713982493] [2024-06-28 02:12:36,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713982493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:36,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:36,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395526330] [2024-06-28 02:12:36,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:36,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:36,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:36,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 173 transitions, 1870 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:36,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:36,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:36,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:37,509 INFO L124 PetriNetUnfolderBase]: 2667/4566 cut-off events. [2024-06-28 02:12:37,509 INFO L125 PetriNetUnfolderBase]: For 34458/34464 co-relation queries the response was YES. [2024-06-28 02:12:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19781 conditions, 4566 events. 2667/4566 cut-off events. For 34458/34464 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30237 event pairs, 1243 based on Foata normal form. 7/4437 useless extension candidates. Maximal degree in co-relation 19721. Up to 3851 conditions per place. [2024-06-28 02:12:37,545 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 166 selfloop transitions, 19 changer transitions 0/196 dead transitions. [2024-06-28 02:12:37,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2336 flow [2024-06-28 02:12:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 02:12:37,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-06-28 02:12:37,546 INFO L175 Difference]: Start difference. First operand has 130 places, 173 transitions, 1870 flow. Second operand 6 states and 145 transitions. [2024-06-28 02:12:37,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2336 flow [2024-06-28 02:12:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 196 transitions, 2297 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:37,598 INFO L231 Difference]: Finished difference. Result has 133 places, 176 transitions, 1909 flow [2024-06-28 02:12:37,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1909, PETRI_PLACES=133, PETRI_TRANSITIONS=176} [2024-06-28 02:12:37,598 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 81 predicate places. [2024-06-28 02:12:37,598 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 176 transitions, 1909 flow [2024-06-28 02:12:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:37,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:37,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:37,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:12:37,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:37,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2119800051, now seen corresponding path program 1 times [2024-06-28 02:12:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283428700] [2024-06-28 02:12:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:38,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:38,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283428700] [2024-06-28 02:12:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283428700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:38,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:38,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:38,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885254484] [2024-06-28 02:12:38,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:38,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:38,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:38,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:38,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 1909 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:38,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:39,050 INFO L124 PetriNetUnfolderBase]: 2690/4610 cut-off events. [2024-06-28 02:12:39,050 INFO L125 PetriNetUnfolderBase]: For 36839/36843 co-relation queries the response was YES. [2024-06-28 02:12:39,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20419 conditions, 4610 events. 2690/4610 cut-off events. For 36839/36843 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30481 event pairs, 1069 based on Foata normal form. 8/4477 useless extension candidates. Maximal degree in co-relation 20358. Up to 3766 conditions per place. [2024-06-28 02:12:39,147 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 165 selfloop transitions, 56 changer transitions 0/232 dead transitions. [2024-06-28 02:12:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 232 transitions, 2723 flow [2024-06-28 02:12:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:12:39,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248447204968945 [2024-06-28 02:12:39,149 INFO L175 Difference]: Start difference. First operand has 133 places, 176 transitions, 1909 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:12:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 232 transitions, 2723 flow [2024-06-28 02:12:39,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 232 transitions, 2662 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:39,202 INFO L231 Difference]: Finished difference. Result has 138 places, 209 transitions, 2340 flow [2024-06-28 02:12:39,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2340, PETRI_PLACES=138, PETRI_TRANSITIONS=209} [2024-06-28 02:12:39,202 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 86 predicate places. [2024-06-28 02:12:39,202 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 209 transitions, 2340 flow [2024-06-28 02:12:39,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:39,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:39,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:12:39,203 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1988607625, now seen corresponding path program 1 times [2024-06-28 02:12:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:39,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539638607] [2024-06-28 02:12:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:39,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:39,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539638607] [2024-06-28 02:12:39,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539638607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:39,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:39,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:39,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427668034] [2024-06-28 02:12:39,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:39,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:39,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:39,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:39,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:39,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 209 transitions, 2340 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:39,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:39,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:39,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:40,579 INFO L124 PetriNetUnfolderBase]: 2809/4809 cut-off events. [2024-06-28 02:12:40,580 INFO L125 PetriNetUnfolderBase]: For 45196/45206 co-relation queries the response was YES. [2024-06-28 02:12:40,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22691 conditions, 4809 events. 2809/4809 cut-off events. For 45196/45206 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31919 event pairs, 646 based on Foata normal form. 14/4689 useless extension candidates. Maximal degree in co-relation 22627. Up to 3683 conditions per place. [2024-06-28 02:12:40,621 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 214 selfloop transitions, 53 changer transitions 0/278 dead transitions. [2024-06-28 02:12:40,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 278 transitions, 3435 flow [2024-06-28 02:12:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:12:40,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-06-28 02:12:40,622 INFO L175 Difference]: Start difference. First operand has 138 places, 209 transitions, 2340 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:12:40,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 278 transitions, 3435 flow [2024-06-28 02:12:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 278 transitions, 3353 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:40,709 INFO L231 Difference]: Finished difference. Result has 147 places, 242 transitions, 2932 flow [2024-06-28 02:12:40,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2932, PETRI_PLACES=147, PETRI_TRANSITIONS=242} [2024-06-28 02:12:40,710 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-28 02:12:40,710 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 242 transitions, 2932 flow [2024-06-28 02:12:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:40,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:40,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:12:40,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -886103069, now seen corresponding path program 2 times [2024-06-28 02:12:40,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:40,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927351875] [2024-06-28 02:12:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:41,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:41,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927351875] [2024-06-28 02:12:41,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927351875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:41,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:41,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979077054] [2024-06-28 02:12:41,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:41,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:41,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 242 transitions, 2932 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:41,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:41,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:41,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:42,139 INFO L124 PetriNetUnfolderBase]: 2987/5087 cut-off events. [2024-06-28 02:12:42,139 INFO L125 PetriNetUnfolderBase]: For 54421/54431 co-relation queries the response was YES. [2024-06-28 02:12:42,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25642 conditions, 5087 events. 2987/5087 cut-off events. For 54421/54431 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33905 event pairs, 736 based on Foata normal form. 14/4958 useless extension candidates. Maximal degree in co-relation 25573. Up to 3847 conditions per place. [2024-06-28 02:12:42,180 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 220 selfloop transitions, 61 changer transitions 0/292 dead transitions. [2024-06-28 02:12:42,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 292 transitions, 3839 flow [2024-06-28 02:12:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:12:42,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2024-06-28 02:12:42,183 INFO L175 Difference]: Start difference. First operand has 147 places, 242 transitions, 2932 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:12:42,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 292 transitions, 3839 flow [2024-06-28 02:12:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 292 transitions, 3722 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:42,284 INFO L231 Difference]: Finished difference. Result has 154 places, 256 transitions, 3228 flow [2024-06-28 02:12:42,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3228, PETRI_PLACES=154, PETRI_TRANSITIONS=256} [2024-06-28 02:12:42,285 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-28 02:12:42,285 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 256 transitions, 3228 flow [2024-06-28 02:12:42,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:42,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:42,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:42,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:12:42,285 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:42,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash -845874059, now seen corresponding path program 3 times [2024-06-28 02:12:42,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:42,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219028073] [2024-06-28 02:12:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:42,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219028073] [2024-06-28 02:12:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219028073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66688790] [2024-06-28 02:12:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:42,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:42,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:42,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 256 transitions, 3228 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:42,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:42,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:42,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:43,654 INFO L124 PetriNetUnfolderBase]: 3117/5300 cut-off events. [2024-06-28 02:12:43,654 INFO L125 PetriNetUnfolderBase]: For 63081/63087 co-relation queries the response was YES. [2024-06-28 02:12:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27642 conditions, 5300 events. 3117/5300 cut-off events. For 63081/63087 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35656 event pairs, 734 based on Foata normal form. 10/5160 useless extension candidates. Maximal degree in co-relation 27570. Up to 3769 conditions per place. [2024-06-28 02:12:43,698 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 220 selfloop transitions, 68 changer transitions 0/299 dead transitions. [2024-06-28 02:12:43,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 299 transitions, 4073 flow [2024-06-28 02:12:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:12:43,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2024-06-28 02:12:43,699 INFO L175 Difference]: Start difference. First operand has 154 places, 256 transitions, 3228 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:12:43,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 299 transitions, 4073 flow [2024-06-28 02:12:43,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 299 transitions, 3996 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:43,824 INFO L231 Difference]: Finished difference. Result has 160 places, 262 transitions, 3419 flow [2024-06-28 02:12:43,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3419, PETRI_PLACES=160, PETRI_TRANSITIONS=262} [2024-06-28 02:12:43,824 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 108 predicate places. [2024-06-28 02:12:43,825 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 262 transitions, 3419 flow [2024-06-28 02:12:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:43,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:43,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:43,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:12:43,825 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -518047427, now seen corresponding path program 4 times [2024-06-28 02:12:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646809233] [2024-06-28 02:12:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646809233] [2024-06-28 02:12:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646809233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:44,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:44,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916820693] [2024-06-28 02:12:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:44,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:44,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:44,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:44,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:44,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 262 transitions, 3419 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:44,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:44,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:44,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:45,288 INFO L124 PetriNetUnfolderBase]: 3454/5874 cut-off events. [2024-06-28 02:12:45,288 INFO L125 PetriNetUnfolderBase]: For 78100/78106 co-relation queries the response was YES. [2024-06-28 02:12:45,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31801 conditions, 5874 events. 3454/5874 cut-off events. For 78100/78106 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40334 event pairs, 705 based on Foata normal form. 10/5702 useless extension candidates. Maximal degree in co-relation 31727. Up to 4330 conditions per place. [2024-06-28 02:12:45,338 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 232 selfloop transitions, 76 changer transitions 0/319 dead transitions. [2024-06-28 02:12:45,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 319 transitions, 4582 flow [2024-06-28 02:12:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:12:45,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-06-28 02:12:45,339 INFO L175 Difference]: Start difference. First operand has 160 places, 262 transitions, 3419 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:12:45,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 319 transitions, 4582 flow [2024-06-28 02:12:45,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 319 transitions, 4467 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:45,485 INFO L231 Difference]: Finished difference. Result has 166 places, 288 transitions, 3992 flow [2024-06-28 02:12:45,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3992, PETRI_PLACES=166, PETRI_TRANSITIONS=288} [2024-06-28 02:12:45,486 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-28 02:12:45,486 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 288 transitions, 3992 flow [2024-06-28 02:12:45,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:45,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:45,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:45,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:12:45,487 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:45,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:45,487 INFO L85 PathProgramCache]: Analyzing trace with hash 933645925, now seen corresponding path program 5 times [2024-06-28 02:12:45,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:45,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687955190] [2024-06-28 02:12:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:45,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687955190] [2024-06-28 02:12:45,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687955190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:45,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:45,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518218573] [2024-06-28 02:12:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:46,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:46,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 288 transitions, 3992 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:46,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:46,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:46,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:47,060 INFO L124 PetriNetUnfolderBase]: 3584/6101 cut-off events. [2024-06-28 02:12:47,060 INFO L125 PetriNetUnfolderBase]: For 88390/88396 co-relation queries the response was YES. [2024-06-28 02:12:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34665 conditions, 6101 events. 3584/6101 cut-off events. For 88390/88396 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 42348 event pairs, 735 based on Foata normal form. 10/5927 useless extension candidates. Maximal degree in co-relation 34587. Up to 3977 conditions per place. [2024-06-28 02:12:47,126 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 226 selfloop transitions, 88 changer transitions 0/325 dead transitions. [2024-06-28 02:12:47,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 325 transitions, 4899 flow [2024-06-28 02:12:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:12:47,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-28 02:12:47,127 INFO L175 Difference]: Start difference. First operand has 166 places, 288 transitions, 3992 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:12:47,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 325 transitions, 4899 flow [2024-06-28 02:12:47,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 325 transitions, 4810 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:47,329 INFO L231 Difference]: Finished difference. Result has 171 places, 294 transitions, 4262 flow [2024-06-28 02:12:47,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3903, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4262, PETRI_PLACES=171, PETRI_TRANSITIONS=294} [2024-06-28 02:12:47,329 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-28 02:12:47,329 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 294 transitions, 4262 flow [2024-06-28 02:12:47,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:47,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:47,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:47,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:12:47,330 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:47,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:47,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1288831525, now seen corresponding path program 6 times [2024-06-28 02:12:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006425731] [2024-06-28 02:12:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006425731] [2024-06-28 02:12:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006425731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:47,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:47,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409650666] [2024-06-28 02:12:47,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:47,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:47,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:47,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 294 transitions, 4262 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:47,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:47,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:47,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:48,920 INFO L124 PetriNetUnfolderBase]: 3821/6540 cut-off events. [2024-06-28 02:12:48,920 INFO L125 PetriNetUnfolderBase]: For 107196/107202 co-relation queries the response was YES. [2024-06-28 02:12:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38263 conditions, 6540 events. 3821/6540 cut-off events. For 107196/107202 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 46137 event pairs, 772 based on Foata normal form. 14/6348 useless extension candidates. Maximal degree in co-relation 38183. Up to 3526 conditions per place. [2024-06-28 02:12:48,982 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 245 selfloop transitions, 84 changer transitions 0/340 dead transitions. [2024-06-28 02:12:48,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 340 transitions, 5377 flow [2024-06-28 02:12:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:12:48,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:12:48,983 INFO L175 Difference]: Start difference. First operand has 171 places, 294 transitions, 4262 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:12:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 340 transitions, 5377 flow [2024-06-28 02:12:49,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 340 transitions, 5240 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:49,188 INFO L231 Difference]: Finished difference. Result has 177 places, 305 transitions, 4561 flow [2024-06-28 02:12:49,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4561, PETRI_PLACES=177, PETRI_TRANSITIONS=305} [2024-06-28 02:12:49,189 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2024-06-28 02:12:49,189 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 305 transitions, 4561 flow [2024-06-28 02:12:49,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:49,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:49,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:49,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:12:49,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:49,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1892322917, now seen corresponding path program 1 times [2024-06-28 02:12:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735578454] [2024-06-28 02:12:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:49,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:49,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735578454] [2024-06-28 02:12:49,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735578454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:49,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:49,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959973163] [2024-06-28 02:12:49,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:49,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:49,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:49,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:49,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:49,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 305 transitions, 4561 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:49,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:49,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:49,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:50,875 INFO L124 PetriNetUnfolderBase]: 3864/6574 cut-off events. [2024-06-28 02:12:50,876 INFO L125 PetriNetUnfolderBase]: For 109706/109706 co-relation queries the response was YES. [2024-06-28 02:12:50,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39730 conditions, 6574 events. 3864/6574 cut-off events. For 109706/109706 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 46194 event pairs, 1395 based on Foata normal form. 3/6359 useless extension candidates. Maximal degree in co-relation 39646. Up to 5512 conditions per place. [2024-06-28 02:12:50,941 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 302 selfloop transitions, 29 changer transitions 0/342 dead transitions. [2024-06-28 02:12:50,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 342 transitions, 5420 flow [2024-06-28 02:12:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:12:50,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2024-06-28 02:12:50,942 INFO L175 Difference]: Start difference. First operand has 177 places, 305 transitions, 4561 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:12:50,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 342 transitions, 5420 flow [2024-06-28 02:12:51,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 342 transitions, 5297 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:51,211 INFO L231 Difference]: Finished difference. Result has 184 places, 313 transitions, 4606 flow [2024-06-28 02:12:51,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4606, PETRI_PLACES=184, PETRI_TRANSITIONS=313} [2024-06-28 02:12:51,211 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-06-28 02:12:51,211 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 313 transitions, 4606 flow [2024-06-28 02:12:51,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:51,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:51,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:51,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:12:51,212 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:51,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1110962143, now seen corresponding path program 2 times [2024-06-28 02:12:51,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:51,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311000500] [2024-06-28 02:12:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:51,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311000500] [2024-06-28 02:12:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311000500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:51,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660894773] [2024-06-28 02:12:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:51,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 313 transitions, 4606 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:51,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:52,843 INFO L124 PetriNetUnfolderBase]: 3940/6704 cut-off events. [2024-06-28 02:12:52,844 INFO L125 PetriNetUnfolderBase]: For 109086/109086 co-relation queries the response was YES. [2024-06-28 02:12:52,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40543 conditions, 6704 events. 3940/6704 cut-off events. For 109086/109086 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47287 event pairs, 1383 based on Foata normal form. 3/6489 useless extension candidates. Maximal degree in co-relation 40456. Up to 5552 conditions per place. [2024-06-28 02:12:52,911 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 308 selfloop transitions, 34 changer transitions 0/353 dead transitions. [2024-06-28 02:12:52,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 353 transitions, 5613 flow [2024-06-28 02:12:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:12:52,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:12:52,912 INFO L175 Difference]: Start difference. First operand has 184 places, 313 transitions, 4606 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:12:52,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 353 transitions, 5613 flow [2024-06-28 02:12:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 353 transitions, 5518 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:53,134 INFO L231 Difference]: Finished difference. Result has 188 places, 323 transitions, 4757 flow [2024-06-28 02:12:53,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4757, PETRI_PLACES=188, PETRI_TRANSITIONS=323} [2024-06-28 02:12:53,134 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-28 02:12:53,135 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 323 transitions, 4757 flow [2024-06-28 02:12:53,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:53,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:53,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:53,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:12:53,135 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:53,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash 356166436, now seen corresponding path program 1 times [2024-06-28 02:12:53,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:53,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82163302] [2024-06-28 02:12:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:53,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:53,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82163302] [2024-06-28 02:12:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82163302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:53,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262356325] [2024-06-28 02:12:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:53,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:53,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:53,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 323 transitions, 4757 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:53,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:53,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:54,893 INFO L124 PetriNetUnfolderBase]: 4186/7050 cut-off events. [2024-06-28 02:12:54,893 INFO L125 PetriNetUnfolderBase]: For 118743/118743 co-relation queries the response was YES. [2024-06-28 02:12:54,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43975 conditions, 7050 events. 4186/7050 cut-off events. For 118743/118743 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49344 event pairs, 709 based on Foata normal form. 4/6828 useless extension candidates. Maximal degree in co-relation 43887. Up to 5306 conditions per place. [2024-06-28 02:12:54,974 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 273 selfloop transitions, 83 changer transitions 0/367 dead transitions. [2024-06-28 02:12:54,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 367 transitions, 5902 flow [2024-06-28 02:12:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:12:54,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:12:54,975 INFO L175 Difference]: Start difference. First operand has 188 places, 323 transitions, 4757 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:12:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 367 transitions, 5902 flow [2024-06-28 02:12:55,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 367 transitions, 5812 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:55,290 INFO L231 Difference]: Finished difference. Result has 193 places, 337 transitions, 5142 flow [2024-06-28 02:12:55,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5142, PETRI_PLACES=193, PETRI_TRANSITIONS=337} [2024-06-28 02:12:55,290 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 141 predicate places. [2024-06-28 02:12:55,290 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 337 transitions, 5142 flow [2024-06-28 02:12:55,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:55,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:55,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:55,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:12:55,291 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:55,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:55,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1283931536, now seen corresponding path program 2 times [2024-06-28 02:12:55,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:55,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649408941] [2024-06-28 02:12:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:55,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649408941] [2024-06-28 02:12:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649408941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:55,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:55,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549041092] [2024-06-28 02:12:55,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:56,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:56,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 337 transitions, 5142 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:56,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:56,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:56,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:57,128 INFO L124 PetriNetUnfolderBase]: 4262/7173 cut-off events. [2024-06-28 02:12:57,129 INFO L125 PetriNetUnfolderBase]: For 130682/130690 co-relation queries the response was YES. [2024-06-28 02:12:57,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45976 conditions, 7173 events. 4262/7173 cut-off events. For 130682/130690 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 50415 event pairs, 757 based on Foata normal form. 12/6962 useless extension candidates. Maximal degree in co-relation 45885. Up to 3884 conditions per place. [2024-06-28 02:12:57,211 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 248 selfloop transitions, 117 changer transitions 0/376 dead transitions. [2024-06-28 02:12:57,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 376 transitions, 6259 flow [2024-06-28 02:12:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:12:57,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:12:57,212 INFO L175 Difference]: Start difference. First operand has 193 places, 337 transitions, 5142 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:12:57,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 376 transitions, 6259 flow [2024-06-28 02:12:57,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 376 transitions, 6089 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:57,609 INFO L231 Difference]: Finished difference. Result has 198 places, 342 transitions, 5360 flow [2024-06-28 02:12:57,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4972, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5360, PETRI_PLACES=198, PETRI_TRANSITIONS=342} [2024-06-28 02:12:57,610 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 146 predicate places. [2024-06-28 02:12:57,610 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 342 transitions, 5360 flow [2024-06-28 02:12:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:57,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:12:57,610 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:57,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:57,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1607590029, now seen corresponding path program 3 times [2024-06-28 02:12:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851480371] [2024-06-28 02:12:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:58,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:58,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851480371] [2024-06-28 02:12:58,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851480371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:58,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:58,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:58,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549744972] [2024-06-28 02:12:58,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:58,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:58,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:58,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:58,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:58,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:12:58,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 342 transitions, 5360 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:58,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:58,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:12:58,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:59,399 INFO L124 PetriNetUnfolderBase]: 4254/7210 cut-off events. [2024-06-28 02:12:59,399 INFO L125 PetriNetUnfolderBase]: For 141390/141398 co-relation queries the response was YES. [2024-06-28 02:12:59,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46898 conditions, 7210 events. 4254/7210 cut-off events. For 141390/141398 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51227 event pairs, 1454 based on Foata normal form. 6/6983 useless extension candidates. Maximal degree in co-relation 46805. Up to 5941 conditions per place. [2024-06-28 02:12:59,484 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 327 selfloop transitions, 47 changer transitions 0/385 dead transitions. [2024-06-28 02:12:59,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 385 transitions, 6522 flow [2024-06-28 02:12:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:12:59,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-28 02:12:59,485 INFO L175 Difference]: Start difference. First operand has 198 places, 342 transitions, 5360 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:12:59,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 385 transitions, 6522 flow [2024-06-28 02:12:59,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 385 transitions, 6161 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 02:12:59,816 INFO L231 Difference]: Finished difference. Result has 201 places, 357 transitions, 5383 flow [2024-06-28 02:12:59,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5383, PETRI_PLACES=201, PETRI_TRANSITIONS=357} [2024-06-28 02:12:59,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 149 predicate places. [2024-06-28 02:12:59,817 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 357 transitions, 5383 flow [2024-06-28 02:12:59,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:59,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:59,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:59,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:12:59,817 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:12:59,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1283664626, now seen corresponding path program 3 times [2024-06-28 02:12:59,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:59,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819576639] [2024-06-28 02:12:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:59,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:00,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:00,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819576639] [2024-06-28 02:13:00,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819576639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:00,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:00,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65516710] [2024-06-28 02:13:00,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:00,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:00,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:00,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 357 transitions, 5383 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:00,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:00,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:00,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:01,512 INFO L124 PetriNetUnfolderBase]: 4286/7237 cut-off events. [2024-06-28 02:13:01,512 INFO L125 PetriNetUnfolderBase]: For 135585/135593 co-relation queries the response was YES. [2024-06-28 02:13:01,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45710 conditions, 7237 events. 4286/7237 cut-off events. For 135585/135593 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 51144 event pairs, 733 based on Foata normal form. 12/7022 useless extension candidates. Maximal degree in co-relation 45615. Up to 3903 conditions per place. [2024-06-28 02:13:01,592 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 116 changer transitions 0/395 dead transitions. [2024-06-28 02:13:01,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 395 transitions, 6512 flow [2024-06-28 02:13:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:13:01,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-06-28 02:13:01,593 INFO L175 Difference]: Start difference. First operand has 201 places, 357 transitions, 5383 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:13:01,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 395 transitions, 6512 flow [2024-06-28 02:13:01,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 395 transitions, 6356 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-28 02:13:01,996 INFO L231 Difference]: Finished difference. Result has 206 places, 360 transitions, 5538 flow [2024-06-28 02:13:01,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5241, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5538, PETRI_PLACES=206, PETRI_TRANSITIONS=360} [2024-06-28 02:13:01,997 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-28 02:13:01,997 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 360 transitions, 5538 flow [2024-06-28 02:13:01,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:01,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:01,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:01,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:13:01,998 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:01,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1515940288, now seen corresponding path program 1 times [2024-06-28 02:13:01,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734387986] [2024-06-28 02:13:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734387986] [2024-06-28 02:13:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734387986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346289193] [2024-06-28 02:13:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:02,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:02,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:02,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 360 transitions, 5538 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:02,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:02,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:02,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:03,720 INFO L124 PetriNetUnfolderBase]: 4352/7353 cut-off events. [2024-06-28 02:13:03,720 INFO L125 PetriNetUnfolderBase]: For 145430/145448 co-relation queries the response was YES. [2024-06-28 02:13:03,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47410 conditions, 7353 events. 4352/7353 cut-off events. For 145430/145448 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52126 event pairs, 713 based on Foata normal form. 22/7156 useless extension candidates. Maximal degree in co-relation 47313. Up to 5492 conditions per place. [2024-06-28 02:13:03,799 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 303 selfloop transitions, 84 changer transitions 0/398 dead transitions. [2024-06-28 02:13:03,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 398 transitions, 6506 flow [2024-06-28 02:13:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:13:03,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407608695652174 [2024-06-28 02:13:03,800 INFO L175 Difference]: Start difference. First operand has 206 places, 360 transitions, 5538 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:13:03,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 398 transitions, 6506 flow [2024-06-28 02:13:04,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 398 transitions, 6278 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-28 02:13:04,177 INFO L231 Difference]: Finished difference. Result has 210 places, 363 transitions, 5557 flow [2024-06-28 02:13:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5557, PETRI_PLACES=210, PETRI_TRANSITIONS=363} [2024-06-28 02:13:04,177 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-28 02:13:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 363 transitions, 5557 flow [2024-06-28 02:13:04,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:04,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:04,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:13:04,178 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1576345766, now seen corresponding path program 1 times [2024-06-28 02:13:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:04,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92263679] [2024-06-28 02:13:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:04,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:04,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92263679] [2024-06-28 02:13:04,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92263679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:04,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:04,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:04,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109284993] [2024-06-28 02:13:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:04,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:04,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 363 transitions, 5557 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:04,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:04,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:04,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:05,909 INFO L124 PetriNetUnfolderBase]: 4405/7399 cut-off events. [2024-06-28 02:13:05,909 INFO L125 PetriNetUnfolderBase]: For 142703/142711 co-relation queries the response was YES. [2024-06-28 02:13:05,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47125 conditions, 7399 events. 4405/7399 cut-off events. For 142703/142711 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52011 event pairs, 803 based on Foata normal form. 11/7186 useless extension candidates. Maximal degree in co-relation 47028. Up to 5814 conditions per place. [2024-06-28 02:13:05,987 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 318 selfloop transitions, 73 changer transitions 0/402 dead transitions. [2024-06-28 02:13:05,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 402 transitions, 6539 flow [2024-06-28 02:13:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:13:05,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:13:05,988 INFO L175 Difference]: Start difference. First operand has 210 places, 363 transitions, 5557 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:13:05,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 402 transitions, 6539 flow [2024-06-28 02:13:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 402 transitions, 6340 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:06,322 INFO L231 Difference]: Finished difference. Result has 212 places, 367 transitions, 5589 flow [2024-06-28 02:13:06,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5360, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5589, PETRI_PLACES=212, PETRI_TRANSITIONS=367} [2024-06-28 02:13:06,322 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 160 predicate places. [2024-06-28 02:13:06,322 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 367 transitions, 5589 flow [2024-06-28 02:13:06,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:06,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:06,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:13:06,323 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:06,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash -452287390, now seen corresponding path program 2 times [2024-06-28 02:13:06,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302258974] [2024-06-28 02:13:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:06,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:06,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:06,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302258974] [2024-06-28 02:13:06,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302258974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:06,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:06,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826317704] [2024-06-28 02:13:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:06,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:06,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:06,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:06,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 367 transitions, 5589 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:06,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:06,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:06,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:08,189 INFO L124 PetriNetUnfolderBase]: 4397/7394 cut-off events. [2024-06-28 02:13:08,190 INFO L125 PetriNetUnfolderBase]: For 144335/144343 co-relation queries the response was YES. [2024-06-28 02:13:08,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46723 conditions, 7394 events. 4397/7394 cut-off events. For 144335/144343 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 52113 event pairs, 792 based on Foata normal form. 11/7180 useless extension candidates. Maximal degree in co-relation 46625. Up to 5253 conditions per place. [2024-06-28 02:13:08,259 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 298 selfloop transitions, 95 changer transitions 0/404 dead transitions. [2024-06-28 02:13:08,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 404 transitions, 6592 flow [2024-06-28 02:13:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-28 02:13:08,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2024-06-28 02:13:08,260 INFO L175 Difference]: Start difference. First operand has 212 places, 367 transitions, 5589 flow. Second operand 8 states and 201 transitions. [2024-06-28 02:13:08,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 404 transitions, 6592 flow [2024-06-28 02:13:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 404 transitions, 6447 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:08,648 INFO L231 Difference]: Finished difference. Result has 215 places, 367 transitions, 5650 flow [2024-06-28 02:13:08,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5650, PETRI_PLACES=215, PETRI_TRANSITIONS=367} [2024-06-28 02:13:08,648 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 163 predicate places. [2024-06-28 02:13:08,648 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 367 transitions, 5650 flow [2024-06-28 02:13:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:08,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:13:08,649 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:08,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1881184124, now seen corresponding path program 2 times [2024-06-28 02:13:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:08,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443252663] [2024-06-28 02:13:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:09,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:09,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443252663] [2024-06-28 02:13:09,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443252663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:09,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:09,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:09,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854740769] [2024-06-28 02:13:09,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:09,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:09,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:09,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:09,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 367 transitions, 5650 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:09,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:09,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:09,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:10,376 INFO L124 PetriNetUnfolderBase]: 4463/7518 cut-off events. [2024-06-28 02:13:10,377 INFO L125 PetriNetUnfolderBase]: For 154050/154068 co-relation queries the response was YES. [2024-06-28 02:13:10,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47882 conditions, 7518 events. 4463/7518 cut-off events. For 154050/154068 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 53432 event pairs, 744 based on Foata normal form. 22/7302 useless extension candidates. Maximal degree in co-relation 47783. Up to 5365 conditions per place. [2024-06-28 02:13:10,467 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 297 selfloop transitions, 92 changer transitions 0/400 dead transitions. [2024-06-28 02:13:10,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 400 transitions, 6622 flow [2024-06-28 02:13:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:13:10,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:13:10,469 INFO L175 Difference]: Start difference. First operand has 215 places, 367 transitions, 5650 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:13:10,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 400 transitions, 6622 flow [2024-06-28 02:13:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 400 transitions, 6469 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:11,038 INFO L231 Difference]: Finished difference. Result has 217 places, 370 transitions, 5770 flow [2024-06-28 02:13:11,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5770, PETRI_PLACES=217, PETRI_TRANSITIONS=370} [2024-06-28 02:13:11,039 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 165 predicate places. [2024-06-28 02:13:11,039 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 370 transitions, 5770 flow [2024-06-28 02:13:11,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:11,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:11,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:11,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:13:11,039 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:11,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash 603022664, now seen corresponding path program 3 times [2024-06-28 02:13:11,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:11,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004928773] [2024-06-28 02:13:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:11,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:11,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:11,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004928773] [2024-06-28 02:13:11,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004928773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:11,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:11,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251912222] [2024-06-28 02:13:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:11,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:11,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:11,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:11,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:11,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 370 transitions, 5770 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:11,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:11,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:11,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:13,014 INFO L124 PetriNetUnfolderBase]: 4532/7618 cut-off events. [2024-06-28 02:13:13,015 INFO L125 PetriNetUnfolderBase]: For 161165/161173 co-relation queries the response was YES. [2024-06-28 02:13:13,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49102 conditions, 7618 events. 4532/7618 cut-off events. For 161165/161173 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54165 event pairs, 757 based on Foata normal form. 12/7396 useless extension candidates. Maximal degree in co-relation 49002. Up to 4051 conditions per place. [2024-06-28 02:13:13,112 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 265 selfloop transitions, 132 changer transitions 0/408 dead transitions. [2024-06-28 02:13:13,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 408 transitions, 6953 flow [2024-06-28 02:13:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-28 02:13:13,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546583850931677 [2024-06-28 02:13:13,113 INFO L175 Difference]: Start difference. First operand has 217 places, 370 transitions, 5770 flow. Second operand 7 states and 176 transitions. [2024-06-28 02:13:13,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 408 transitions, 6953 flow [2024-06-28 02:13:13,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 408 transitions, 6728 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:13,628 INFO L231 Difference]: Finished difference. Result has 219 places, 373 transitions, 5899 flow [2024-06-28 02:13:13,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5899, PETRI_PLACES=219, PETRI_TRANSITIONS=373} [2024-06-28 02:13:13,629 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 167 predicate places. [2024-06-28 02:13:13,629 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 373 transitions, 5899 flow [2024-06-28 02:13:13,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:13,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:13,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:13,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:13:13,630 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:13,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash 603010574, now seen corresponding path program 4 times [2024-06-28 02:13:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:13,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467794531] [2024-06-28 02:13:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:13,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:14,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467794531] [2024-06-28 02:13:14,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467794531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:14,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:14,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590427357] [2024-06-28 02:13:14,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:14,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:14,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:14,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:14,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 373 transitions, 5899 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:14,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:14,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:15,412 INFO L124 PetriNetUnfolderBase]: 4522/7640 cut-off events. [2024-06-28 02:13:15,412 INFO L125 PetriNetUnfolderBase]: For 160572/160580 co-relation queries the response was YES. [2024-06-28 02:13:15,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49464 conditions, 7640 events. 4522/7640 cut-off events. For 160572/160580 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54399 event pairs, 747 based on Foata normal form. 12/7420 useless extension candidates. Maximal degree in co-relation 49363. Up to 4045 conditions per place. [2024-06-28 02:13:15,499 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 278 selfloop transitions, 118 changer transitions 0/407 dead transitions. [2024-06-28 02:13:15,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 407 transitions, 6932 flow [2024-06-28 02:13:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:13:15,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-28 02:13:15,500 INFO L175 Difference]: Start difference. First operand has 219 places, 373 transitions, 5899 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:13:15,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 407 transitions, 6932 flow [2024-06-28 02:13:16,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 407 transitions, 6662 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 02:13:16,006 INFO L231 Difference]: Finished difference. Result has 222 places, 373 transitions, 5873 flow [2024-06-28 02:13:16,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5629, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5873, PETRI_PLACES=222, PETRI_TRANSITIONS=373} [2024-06-28 02:13:16,007 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 170 predicate places. [2024-06-28 02:13:16,007 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 373 transitions, 5873 flow [2024-06-28 02:13:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:16,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:16,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:16,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:13:16,007 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:16,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1432113736, now seen corresponding path program 3 times [2024-06-28 02:13:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:16,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362227553] [2024-06-28 02:13:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:16,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362227553] [2024-06-28 02:13:16,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362227553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:16,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072095571] [2024-06-28 02:13:16,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:16,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:16,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 373 transitions, 5873 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:16,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:16,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:16,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:17,818 INFO L124 PetriNetUnfolderBase]: 4549/7660 cut-off events. [2024-06-28 02:13:17,818 INFO L125 PetriNetUnfolderBase]: For 156157/156165 co-relation queries the response was YES. [2024-06-28 02:13:17,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49561 conditions, 7660 events. 4549/7660 cut-off events. For 156157/156165 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 54407 event pairs, 765 based on Foata normal form. 14/7418 useless extension candidates. Maximal degree in co-relation 49459. Up to 5943 conditions per place. [2024-06-28 02:13:17,909 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 324 selfloop transitions, 77 changer transitions 0/412 dead transitions. [2024-06-28 02:13:17,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 412 transitions, 6975 flow [2024-06-28 02:13:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:13:17,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:13:17,910 INFO L175 Difference]: Start difference. First operand has 222 places, 373 transitions, 5873 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:13:17,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 412 transitions, 6975 flow [2024-06-28 02:13:18,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 412 transitions, 6519 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 02:13:18,448 INFO L231 Difference]: Finished difference. Result has 221 places, 381 transitions, 5758 flow [2024-06-28 02:13:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5435, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5758, PETRI_PLACES=221, PETRI_TRANSITIONS=381} [2024-06-28 02:13:18,452 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-28 02:13:18,452 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 381 transitions, 5758 flow [2024-06-28 02:13:18,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:18,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:18,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:18,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:13:18,453 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:18,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash 640582304, now seen corresponding path program 4 times [2024-06-28 02:13:18,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:18,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561559488] [2024-06-28 02:13:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:18,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561559488] [2024-06-28 02:13:18,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561559488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:18,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508012977] [2024-06-28 02:13:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:18,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:19,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:19,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 381 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:19,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:19,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:19,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:20,243 INFO L124 PetriNetUnfolderBase]: 4541/7649 cut-off events. [2024-06-28 02:13:20,243 INFO L125 PetriNetUnfolderBase]: For 151005/151013 co-relation queries the response was YES. [2024-06-28 02:13:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47563 conditions, 7649 events. 4541/7649 cut-off events. For 151005/151013 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 54413 event pairs, 775 based on Foata normal form. 11/7416 useless extension candidates. Maximal degree in co-relation 47460. Up to 5206 conditions per place. [2024-06-28 02:13:20,344 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 293 selfloop transitions, 108 changer transitions 0/412 dead transitions. [2024-06-28 02:13:20,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 412 transitions, 6769 flow [2024-06-28 02:13:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:13:20,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-06-28 02:13:20,345 INFO L175 Difference]: Start difference. First operand has 221 places, 381 transitions, 5758 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:13:20,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 412 transitions, 6769 flow [2024-06-28 02:13:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 412 transitions, 6645 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:20,980 INFO L231 Difference]: Finished difference. Result has 225 places, 381 transitions, 5875 flow [2024-06-28 02:13:20,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5636, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5875, PETRI_PLACES=225, PETRI_TRANSITIONS=381} [2024-06-28 02:13:20,980 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-28 02:13:20,980 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 381 transitions, 5875 flow [2024-06-28 02:13:20,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:20,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:20,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:20,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:13:20,981 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:20,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1059018784, now seen corresponding path program 5 times [2024-06-28 02:13:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001806631] [2024-06-28 02:13:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:20,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:21,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001806631] [2024-06-28 02:13:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001806631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:21,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:21,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:21,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848073859] [2024-06-28 02:13:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:21,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:21,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:21,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 381 transitions, 5875 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:21,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:21,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:21,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:22,896 INFO L124 PetriNetUnfolderBase]: 4662/7832 cut-off events. [2024-06-28 02:13:22,896 INFO L125 PetriNetUnfolderBase]: For 161403/161403 co-relation queries the response was YES. [2024-06-28 02:13:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49849 conditions, 7832 events. 4662/7832 cut-off events. For 161403/161403 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 55539 event pairs, 801 based on Foata normal form. 1/7571 useless extension candidates. Maximal degree in co-relation 49745. Up to 6155 conditions per place. [2024-06-28 02:13:22,981 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 327 selfloop transitions, 98 changer transitions 0/436 dead transitions. [2024-06-28 02:13:22,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 436 transitions, 7512 flow [2024-06-28 02:13:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:13:22,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-28 02:13:22,982 INFO L175 Difference]: Start difference. First operand has 225 places, 381 transitions, 5875 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:13:22,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 436 transitions, 7512 flow [2024-06-28 02:13:23,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 436 transitions, 7309 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:23,548 INFO L231 Difference]: Finished difference. Result has 230 places, 410 transitions, 6649 flow [2024-06-28 02:13:23,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6649, PETRI_PLACES=230, PETRI_TRANSITIONS=410} [2024-06-28 02:13:23,549 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-06-28 02:13:23,549 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 410 transitions, 6649 flow [2024-06-28 02:13:23,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:23,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:23,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:23,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:13:23,549 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:23,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1267833720, now seen corresponding path program 6 times [2024-06-28 02:13:23,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:23,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918591370] [2024-06-28 02:13:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:23,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:23,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918591370] [2024-06-28 02:13:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918591370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:23,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:23,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:23,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498554185] [2024-06-28 02:13:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:23,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:23,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:24,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:24,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 410 transitions, 6649 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:24,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:24,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:24,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:25,372 INFO L124 PetriNetUnfolderBase]: 4650/7811 cut-off events. [2024-06-28 02:13:25,373 INFO L125 PetriNetUnfolderBase]: For 161012/161012 co-relation queries the response was YES. [2024-06-28 02:13:25,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49747 conditions, 7811 events. 4650/7811 cut-off events. For 161012/161012 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 55439 event pairs, 803 based on Foata normal form. 2/7550 useless extension candidates. Maximal degree in co-relation 49641. Up to 6117 conditions per place. [2024-06-28 02:13:25,470 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 324 selfloop transitions, 101 changer transitions 0/436 dead transitions. [2024-06-28 02:13:25,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 436 transitions, 7637 flow [2024-06-28 02:13:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:13:25,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-28 02:13:25,475 INFO L175 Difference]: Start difference. First operand has 230 places, 410 transitions, 6649 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:13:25,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 436 transitions, 7637 flow [2024-06-28 02:13:26,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 436 transitions, 7351 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 02:13:26,208 INFO L231 Difference]: Finished difference. Result has 233 places, 410 transitions, 6591 flow [2024-06-28 02:13:26,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6591, PETRI_PLACES=233, PETRI_TRANSITIONS=410} [2024-06-28 02:13:26,210 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 181 predicate places. [2024-06-28 02:13:26,210 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 410 transitions, 6591 flow [2024-06-28 02:13:26,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:26,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:26,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:26,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:13:26,211 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:26,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1843756154, now seen corresponding path program 7 times [2024-06-28 02:13:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201551912] [2024-06-28 02:13:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201551912] [2024-06-28 02:13:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201551912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:26,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:26,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557375160] [2024-06-28 02:13:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:26,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:26,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:26,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 410 transitions, 6591 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:26,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:26,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:26,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:28,063 INFO L124 PetriNetUnfolderBase]: 4642/7795 cut-off events. [2024-06-28 02:13:28,063 INFO L125 PetriNetUnfolderBase]: For 160540/160540 co-relation queries the response was YES. [2024-06-28 02:13:28,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49496 conditions, 7795 events. 4642/7795 cut-off events. For 160540/160540 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 55240 event pairs, 774 based on Foata normal form. 2/7535 useless extension candidates. Maximal degree in co-relation 49389. Up to 5791 conditions per place. [2024-06-28 02:13:28,171 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 313 selfloop transitions, 113 changer transitions 0/437 dead transitions. [2024-06-28 02:13:28,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 437 transitions, 7575 flow [2024-06-28 02:13:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:28,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:13:28,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372670807453416 [2024-06-28 02:13:28,173 INFO L175 Difference]: Start difference. First operand has 233 places, 410 transitions, 6591 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:13:28,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 437 transitions, 7575 flow [2024-06-28 02:13:28,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 437 transitions, 7145 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 02:13:28,816 INFO L231 Difference]: Finished difference. Result has 233 places, 410 transitions, 6396 flow [2024-06-28 02:13:28,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6396, PETRI_PLACES=233, PETRI_TRANSITIONS=410} [2024-06-28 02:13:28,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 181 predicate places. [2024-06-28 02:13:28,817 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 410 transitions, 6396 flow [2024-06-28 02:13:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:28,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:28,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:28,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:13:28,817 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:28,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:28,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1304790194, now seen corresponding path program 8 times [2024-06-28 02:13:28,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:28,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330182219] [2024-06-28 02:13:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:28,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:29,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330182219] [2024-06-28 02:13:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330182219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:29,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:29,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:29,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269380429] [2024-06-28 02:13:29,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:29,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:29,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:29,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:29,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:29,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 410 transitions, 6396 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:29,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:29,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:29,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:30,721 INFO L124 PetriNetUnfolderBase]: 4682/7851 cut-off events. [2024-06-28 02:13:30,721 INFO L125 PetriNetUnfolderBase]: For 153350/153358 co-relation queries the response was YES. [2024-06-28 02:13:30,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49414 conditions, 7851 events. 4682/7851 cut-off events. For 153350/153358 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55519 event pairs, 785 based on Foata normal form. 10/7605 useless extension candidates. Maximal degree in co-relation 49306. Up to 4112 conditions per place. [2024-06-28 02:13:30,807 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 286 selfloop transitions, 150 changer transitions 0/447 dead transitions. [2024-06-28 02:13:30,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 447 transitions, 7581 flow [2024-06-28 02:13:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:13:30,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:13:30,808 INFO L175 Difference]: Start difference. First operand has 233 places, 410 transitions, 6396 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:13:30,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 447 transitions, 7581 flow [2024-06-28 02:13:31,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 447 transitions, 7316 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:31,250 INFO L231 Difference]: Finished difference. Result has 234 places, 414 transitions, 6501 flow [2024-06-28 02:13:31,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6501, PETRI_PLACES=234, PETRI_TRANSITIONS=414} [2024-06-28 02:13:31,251 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-28 02:13:31,251 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 414 transitions, 6501 flow [2024-06-28 02:13:31,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:31,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:31,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:31,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:13:31,251 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:31,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1133170040, now seen corresponding path program 9 times [2024-06-28 02:13:31,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:31,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339427704] [2024-06-28 02:13:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:31,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339427704] [2024-06-28 02:13:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339427704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:31,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015287951] [2024-06-28 02:13:31,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:31,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:31,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 414 transitions, 6501 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:31,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:33,146 INFO L124 PetriNetUnfolderBase]: 4649/7815 cut-off events. [2024-06-28 02:13:33,146 INFO L125 PetriNetUnfolderBase]: For 154972/154980 co-relation queries the response was YES. [2024-06-28 02:13:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49651 conditions, 7815 events. 4649/7815 cut-off events. For 154972/154980 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 55410 event pairs, 780 based on Foata normal form. 14/7574 useless extension candidates. Maximal degree in co-relation 49542. Up to 4083 conditions per place. [2024-06-28 02:13:33,248 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 303 selfloop transitions, 134 changer transitions 0/448 dead transitions. [2024-06-28 02:13:33,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 448 transitions, 7559 flow [2024-06-28 02:13:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-28 02:13:33,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:13:33,249 INFO L175 Difference]: Start difference. First operand has 234 places, 414 transitions, 6501 flow. Second operand 7 states and 175 transitions. [2024-06-28 02:13:33,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 448 transitions, 7559 flow [2024-06-28 02:13:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 448 transitions, 7261 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 02:13:33,882 INFO L231 Difference]: Finished difference. Result has 237 places, 414 transitions, 6480 flow [2024-06-28 02:13:33,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6480, PETRI_PLACES=237, PETRI_TRANSITIONS=414} [2024-06-28 02:13:33,882 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-28 02:13:33,882 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 414 transitions, 6480 flow [2024-06-28 02:13:33,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:33,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:33,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:33,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:13:33,883 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:33,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1146988538, now seen corresponding path program 1 times [2024-06-28 02:13:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563887489] [2024-06-28 02:13:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563887489] [2024-06-28 02:13:34,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563887489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:34,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:34,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:34,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541751969] [2024-06-28 02:13:34,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:34,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:34,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:34,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 414 transitions, 6480 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:34,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:34,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:34,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:36,023 INFO L124 PetriNetUnfolderBase]: 4682/7882 cut-off events. [2024-06-28 02:13:36,024 INFO L125 PetriNetUnfolderBase]: For 154295/154305 co-relation queries the response was YES. [2024-06-28 02:13:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49886 conditions, 7882 events. 4682/7882 cut-off events. For 154295/154305 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56029 event pairs, 1355 based on Foata normal form. 12/7625 useless extension candidates. Maximal degree in co-relation 49776. Up to 6570 conditions per place. [2024-06-28 02:13:36,121 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 381 selfloop transitions, 53 changer transitions 0/445 dead transitions. [2024-06-28 02:13:36,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 445 transitions, 7547 flow [2024-06-28 02:13:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:13:36,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5279503105590062 [2024-06-28 02:13:36,122 INFO L175 Difference]: Start difference. First operand has 237 places, 414 transitions, 6480 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:13:36,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 445 transitions, 7547 flow [2024-06-28 02:13:36,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 445 transitions, 7160 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 02:13:36,707 INFO L231 Difference]: Finished difference. Result has 236 places, 417 transitions, 6272 flow [2024-06-28 02:13:36,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6272, PETRI_PLACES=236, PETRI_TRANSITIONS=417} [2024-06-28 02:13:36,707 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 184 predicate places. [2024-06-28 02:13:36,707 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 417 transitions, 6272 flow [2024-06-28 02:13:36,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:36,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:36,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:13:36,708 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:36,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1147463768, now seen corresponding path program 2 times [2024-06-28 02:13:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937261383] [2024-06-28 02:13:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937261383] [2024-06-28 02:13:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937261383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:37,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517984031] [2024-06-28 02:13:37,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:37,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:37,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:37,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 417 transitions, 6272 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:37,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:37,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:37,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:38,685 INFO L124 PetriNetUnfolderBase]: 4682/7883 cut-off events. [2024-06-28 02:13:38,685 INFO L125 PetriNetUnfolderBase]: For 151499/151509 co-relation queries the response was YES. [2024-06-28 02:13:38,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48549 conditions, 7883 events. 4682/7883 cut-off events. For 151499/151509 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 56025 event pairs, 1349 based on Foata normal form. 12/7626 useless extension candidates. Maximal degree in co-relation 48438. Up to 6531 conditions per place. [2024-06-28 02:13:38,783 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 377 selfloop transitions, 59 changer transitions 0/447 dead transitions. [2024-06-28 02:13:38,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 447 transitions, 7440 flow [2024-06-28 02:13:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:13:38,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-06-28 02:13:38,784 INFO L175 Difference]: Start difference. First operand has 236 places, 417 transitions, 6272 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:13:38,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 447 transitions, 7440 flow [2024-06-28 02:13:39,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 447 transitions, 7237 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:39,336 INFO L231 Difference]: Finished difference. Result has 239 places, 425 transitions, 6405 flow [2024-06-28 02:13:39,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6405, PETRI_PLACES=239, PETRI_TRANSITIONS=425} [2024-06-28 02:13:39,336 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 187 predicate places. [2024-06-28 02:13:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 425 transitions, 6405 flow [2024-06-28 02:13:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:39,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:39,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:13:39,339 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:39,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1847587258, now seen corresponding path program 1 times [2024-06-28 02:13:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:39,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172786007] [2024-06-28 02:13:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172786007] [2024-06-28 02:13:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172786007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954623777] [2024-06-28 02:13:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:40,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:40,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 425 transitions, 6405 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:40,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:40,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:40,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:41,605 INFO L124 PetriNetUnfolderBase]: 4677/7871 cut-off events. [2024-06-28 02:13:41,605 INFO L125 PetriNetUnfolderBase]: For 155855/155855 co-relation queries the response was YES. [2024-06-28 02:13:41,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48633 conditions, 7871 events. 4677/7871 cut-off events. For 155855/155855 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 56039 event pairs, 1589 based on Foata normal form. 2/7611 useless extension candidates. Maximal degree in co-relation 48520. Up to 6606 conditions per place. [2024-06-28 02:13:41,682 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 415 selfloop transitions, 32 changer transitions 0/458 dead transitions. [2024-06-28 02:13:41,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 458 transitions, 7499 flow [2024-06-28 02:13:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:13:41,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2024-06-28 02:13:41,683 INFO L175 Difference]: Start difference. First operand has 239 places, 425 transitions, 6405 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:13:41,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 458 transitions, 7499 flow [2024-06-28 02:13:42,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 458 transitions, 7275 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:42,193 INFO L231 Difference]: Finished difference. Result has 243 places, 428 transitions, 6321 flow [2024-06-28 02:13:42,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6321, PETRI_PLACES=243, PETRI_TRANSITIONS=428} [2024-06-28 02:13:42,193 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 191 predicate places. [2024-06-28 02:13:42,193 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 428 transitions, 6321 flow [2024-06-28 02:13:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:42,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:42,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:13:42,194 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:42,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 76341232, now seen corresponding path program 1 times [2024-06-28 02:13:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:42,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579291234] [2024-06-28 02:13:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579291234] [2024-06-28 02:13:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579291234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:42,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986438329] [2024-06-28 02:13:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:42,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 428 transitions, 6321 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:44,291 INFO L124 PetriNetUnfolderBase]: 5022/8319 cut-off events. [2024-06-28 02:13:44,291 INFO L125 PetriNetUnfolderBase]: For 180289/180289 co-relation queries the response was YES. [2024-06-28 02:13:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52105 conditions, 8319 events. 5022/8319 cut-off events. For 180289/180289 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58874 event pairs, 620 based on Foata normal form. 12/8065 useless extension candidates. Maximal degree in co-relation 51990. Up to 5362 conditions per place. [2024-06-28 02:13:44,402 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 344 selfloop transitions, 131 changer transitions 0/486 dead transitions. [2024-06-28 02:13:44,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 486 transitions, 7796 flow [2024-06-28 02:13:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:13:44,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-06-28 02:13:44,404 INFO L175 Difference]: Start difference. First operand has 243 places, 428 transitions, 6321 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:13:44,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 486 transitions, 7796 flow [2024-06-28 02:13:45,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 486 transitions, 7726 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:45,061 INFO L231 Difference]: Finished difference. Result has 248 places, 447 transitions, 6844 flow [2024-06-28 02:13:45,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6251, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6844, PETRI_PLACES=248, PETRI_TRANSITIONS=447} [2024-06-28 02:13:45,061 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 196 predicate places. [2024-06-28 02:13:45,061 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 447 transitions, 6844 flow [2024-06-28 02:13:45,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:45,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:45,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:45,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:13:45,062 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:45,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 80089132, now seen corresponding path program 2 times [2024-06-28 02:13:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031359424] [2024-06-28 02:13:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031359424] [2024-06-28 02:13:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031359424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:45,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490383656] [2024-06-28 02:13:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:45,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:45,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:45,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:45,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 447 transitions, 6844 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:45,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:45,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:45,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:47,529 INFO L124 PetriNetUnfolderBase]: 6363/10411 cut-off events. [2024-06-28 02:13:47,529 INFO L125 PetriNetUnfolderBase]: For 329797/329797 co-relation queries the response was YES. [2024-06-28 02:13:47,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71304 conditions, 10411 events. 6363/10411 cut-off events. For 329797/329797 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 76732 event pairs, 810 based on Foata normal form. 12/10177 useless extension candidates. Maximal degree in co-relation 71186. Up to 4997 conditions per place. [2024-06-28 02:13:47,677 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 383 selfloop transitions, 139 changer transitions 0/533 dead transitions. [2024-06-28 02:13:47,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 533 transitions, 8929 flow [2024-06-28 02:13:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 02:13:47,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-28 02:13:47,678 INFO L175 Difference]: Start difference. First operand has 248 places, 447 transitions, 6844 flow. Second operand 8 states and 208 transitions. [2024-06-28 02:13:47,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 533 transitions, 8929 flow [2024-06-28 02:13:48,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 533 transitions, 8661 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:48,655 INFO L231 Difference]: Finished difference. Result has 255 places, 476 transitions, 7451 flow [2024-06-28 02:13:48,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6602, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7451, PETRI_PLACES=255, PETRI_TRANSITIONS=476} [2024-06-28 02:13:48,656 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 203 predicate places. [2024-06-28 02:13:48,656 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 476 transitions, 7451 flow [2024-06-28 02:13:48,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:48,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:48,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:48,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:13:48,656 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:48,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 80095890, now seen corresponding path program 1 times [2024-06-28 02:13:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110915967] [2024-06-28 02:13:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:49,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:49,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110915967] [2024-06-28 02:13:49,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110915967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:49,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:49,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:49,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723290318] [2024-06-28 02:13:49,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:49,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:49,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:49,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:49,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 476 transitions, 7451 flow. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:49,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:49,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:49,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:51,426 INFO L124 PetriNetUnfolderBase]: 6416/10494 cut-off events. [2024-06-28 02:13:51,426 INFO L125 PetriNetUnfolderBase]: For 338138/338138 co-relation queries the response was YES. [2024-06-28 02:13:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72602 conditions, 10494 events. 6416/10494 cut-off events. For 338138/338138 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 76809 event pairs, 1039 based on Foata normal form. 8/10244 useless extension candidates. Maximal degree in co-relation 72481. Up to 8265 conditions per place. [2024-06-28 02:13:51,563 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 362 selfloop transitions, 144 changer transitions 0/517 dead transitions. [2024-06-28 02:13:51,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 517 transitions, 8806 flow [2024-06-28 02:13:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:13:51,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407608695652174 [2024-06-28 02:13:51,564 INFO L175 Difference]: Start difference. First operand has 255 places, 476 transitions, 7451 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:13:51,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 517 transitions, 8806 flow [2024-06-28 02:13:52,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 517 transitions, 8527 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:52,933 INFO L231 Difference]: Finished difference. Result has 260 places, 482 transitions, 7645 flow [2024-06-28 02:13:52,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7645, PETRI_PLACES=260, PETRI_TRANSITIONS=482} [2024-06-28 02:13:52,933 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 208 predicate places. [2024-06-28 02:13:52,933 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 482 transitions, 7645 flow [2024-06-28 02:13:52,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:52,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:52,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:52,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:13:52,934 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:52,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash 80095642, now seen corresponding path program 3 times [2024-06-28 02:13:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:52,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72303534] [2024-06-28 02:13:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:52,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:53,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72303534] [2024-06-28 02:13:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72303534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:53,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249815993] [2024-06-28 02:13:53,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:53,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:53,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 482 transitions, 7645 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:53,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:53,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:53,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:55,541 INFO L124 PetriNetUnfolderBase]: 6586/10741 cut-off events. [2024-06-28 02:13:55,541 INFO L125 PetriNetUnfolderBase]: For 345995/345995 co-relation queries the response was YES. [2024-06-28 02:13:55,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72780 conditions, 10741 events. 6586/10741 cut-off events. For 345995/345995 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 79027 event pairs, 744 based on Foata normal form. 36/10536 useless extension candidates. Maximal degree in co-relation 72657. Up to 5177 conditions per place. [2024-06-28 02:13:55,694 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 383 selfloop transitions, 154 changer transitions 0/548 dead transitions. [2024-06-28 02:13:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 548 transitions, 9494 flow [2024-06-28 02:13:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-28 02:13:55,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-06-28 02:13:55,695 INFO L175 Difference]: Start difference. First operand has 260 places, 482 transitions, 7645 flow. Second operand 8 states and 209 transitions. [2024-06-28 02:13:55,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 548 transitions, 9494 flow [2024-06-28 02:13:56,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 548 transitions, 9045 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:56,896 INFO L231 Difference]: Finished difference. Result has 264 places, 501 transitions, 7997 flow [2024-06-28 02:13:56,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7246, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7997, PETRI_PLACES=264, PETRI_TRANSITIONS=501} [2024-06-28 02:13:56,897 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 212 predicate places. [2024-06-28 02:13:56,897 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 501 transitions, 7997 flow [2024-06-28 02:13:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:56,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:56,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:13:56,898 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:13:56,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1138898840, now seen corresponding path program 2 times [2024-06-28 02:13:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640612449] [2024-06-28 02:13:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:56,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640612449] [2024-06-28 02:13:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640612449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:57,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:57,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:57,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552392688] [2024-06-28 02:13:57,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:57,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:57,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:13:57,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 501 transitions, 7997 flow. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:57,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:57,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:13:57,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:59,895 INFO L124 PetriNetUnfolderBase]: 6704/10975 cut-off events. [2024-06-28 02:13:59,895 INFO L125 PetriNetUnfolderBase]: For 341795/341803 co-relation queries the response was YES. [2024-06-28 02:13:59,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75896 conditions, 10975 events. 6704/10975 cut-off events. For 341795/341803 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 81371 event pairs, 997 based on Foata normal form. 16/10746 useless extension candidates. Maximal degree in co-relation 75770. Up to 6967 conditions per place. [2024-06-28 02:14:00,049 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 371 selfloop transitions, 165 changer transitions 0/547 dead transitions. [2024-06-28 02:14:00,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 547 transitions, 9459 flow [2024-06-28 02:14:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-28 02:14:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-06-28 02:14:00,051 INFO L175 Difference]: Start difference. First operand has 264 places, 501 transitions, 7997 flow. Second operand 8 states and 200 transitions. [2024-06-28 02:14:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 547 transitions, 9459 flow [2024-06-28 02:14:01,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 547 transitions, 9254 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 02:14:01,601 INFO L231 Difference]: Finished difference. Result has 269 places, 505 transitions, 8247 flow [2024-06-28 02:14:01,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8247, PETRI_PLACES=269, PETRI_TRANSITIONS=505} [2024-06-28 02:14:01,602 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 217 predicate places. [2024-06-28 02:14:01,602 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 505 transitions, 8247 flow [2024-06-28 02:14:01,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:01,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:14:01,603 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:01,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1138898592, now seen corresponding path program 4 times [2024-06-28 02:14:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:01,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388899846] [2024-06-28 02:14:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:01,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:02,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:02,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388899846] [2024-06-28 02:14:02,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388899846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:02,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:02,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:02,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440799506] [2024-06-28 02:14:02,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:02,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:02,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:02,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 505 transitions, 8247 flow. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:02,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:02,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:02,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:04,852 INFO L124 PetriNetUnfolderBase]: 7892/12974 cut-off events. [2024-06-28 02:14:04,852 INFO L125 PetriNetUnfolderBase]: For 486896/486896 co-relation queries the response was YES. [2024-06-28 02:14:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90822 conditions, 12974 events. 7892/12974 cut-off events. For 486896/486896 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 99439 event pairs, 1183 based on Foata normal form. 36/12731 useless extension candidates. Maximal degree in co-relation 90694. Up to 5213 conditions per place. [2024-06-28 02:14:05,065 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 475 selfloop transitions, 144 changer transitions 0/630 dead transitions. [2024-06-28 02:14:05,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 630 transitions, 11262 flow [2024-06-28 02:14:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:14:05,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-28 02:14:05,067 INFO L175 Difference]: Start difference. First operand has 269 places, 505 transitions, 8247 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:14:05,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 630 transitions, 11262 flow [2024-06-28 02:14:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 630 transitions, 10641 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-28 02:14:07,553 INFO L231 Difference]: Finished difference. Result has 274 places, 546 transitions, 8999 flow [2024-06-28 02:14:07,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7822, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8999, PETRI_PLACES=274, PETRI_TRANSITIONS=546} [2024-06-28 02:14:07,554 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 222 predicate places. [2024-06-28 02:14:07,554 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 546 transitions, 8999 flow [2024-06-28 02:14:07,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:07,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:07,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:14:07,555 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:07,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1138892082, now seen corresponding path program 5 times [2024-06-28 02:14:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:07,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236350968] [2024-06-28 02:14:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:07,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:08,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:08,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236350968] [2024-06-28 02:14:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236350968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066793705] [2024-06-28 02:14:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:08,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:08,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 546 transitions, 8999 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:08,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:08,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:08,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:11,393 INFO L124 PetriNetUnfolderBase]: 8151/13433 cut-off events. [2024-06-28 02:14:11,393 INFO L125 PetriNetUnfolderBase]: For 513444/513444 co-relation queries the response was YES. [2024-06-28 02:14:11,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95607 conditions, 13433 events. 8151/13433 cut-off events. For 513444/513444 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 104159 event pairs, 1122 based on Foata normal form. 12/13175 useless extension candidates. Maximal degree in co-relation 95475. Up to 5249 conditions per place. [2024-06-28 02:14:11,707 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 477 selfloop transitions, 149 changer transitions 0/637 dead transitions. [2024-06-28 02:14:11,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 637 transitions, 11464 flow [2024-06-28 02:14:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:14:11,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-06-28 02:14:11,709 INFO L175 Difference]: Start difference. First operand has 274 places, 546 transitions, 8999 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:14:11,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 637 transitions, 11464 flow [2024-06-28 02:14:13,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 637 transitions, 11203 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-28 02:14:13,581 INFO L231 Difference]: Finished difference. Result has 282 places, 560 transitions, 9432 flow [2024-06-28 02:14:13,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9432, PETRI_PLACES=282, PETRI_TRANSITIONS=560} [2024-06-28 02:14:13,582 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 230 predicate places. [2024-06-28 02:14:13,582 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 560 transitions, 9432 flow [2024-06-28 02:14:13,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:13,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:13,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:14:13,582 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:13,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1313079036, now seen corresponding path program 6 times [2024-06-28 02:14:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011781653] [2024-06-28 02:14:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011781653] [2024-06-28 02:14:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011781653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574848732] [2024-06-28 02:14:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:14,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:14,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:14,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 560 transitions, 9432 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:14,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:14,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:14,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:18,109 INFO L124 PetriNetUnfolderBase]: 9010/14992 cut-off events. [2024-06-28 02:14:18,109 INFO L125 PetriNetUnfolderBase]: For 604065/604065 co-relation queries the response was YES. [2024-06-28 02:14:18,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105762 conditions, 14992 events. 9010/14992 cut-off events. For 604065/604065 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 120219 event pairs, 1261 based on Foata normal form. 36/14751 useless extension candidates. Maximal degree in co-relation 105626. Up to 4260 conditions per place. [2024-06-28 02:14:18,380 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 468 selfloop transitions, 169 changer transitions 0/648 dead transitions. [2024-06-28 02:14:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 648 transitions, 11915 flow [2024-06-28 02:14:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:14:18,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-06-28 02:14:18,381 INFO L175 Difference]: Start difference. First operand has 282 places, 560 transitions, 9432 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:14:18,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 648 transitions, 11915 flow [2024-06-28 02:14:21,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 648 transitions, 11556 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-28 02:14:21,248 INFO L231 Difference]: Finished difference. Result has 289 places, 582 transitions, 10163 flow [2024-06-28 02:14:21,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9110, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10163, PETRI_PLACES=289, PETRI_TRANSITIONS=582} [2024-06-28 02:14:21,248 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 237 predicate places. [2024-06-28 02:14:21,248 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 582 transitions, 10163 flow [2024-06-28 02:14:21,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:21,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:21,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:21,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:14:21,249 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:21,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1147173050, now seen corresponding path program 3 times [2024-06-28 02:14:21,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130595484] [2024-06-28 02:14:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:21,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:21,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130595484] [2024-06-28 02:14:21,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130595484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:21,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:21,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252198559] [2024-06-28 02:14:21,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:21,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:22,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:22,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 582 transitions, 10163 flow. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:22,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:22,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:26,263 INFO L124 PetriNetUnfolderBase]: 9054/15053 cut-off events. [2024-06-28 02:14:26,263 INFO L125 PetriNetUnfolderBase]: For 598518/598518 co-relation queries the response was YES. [2024-06-28 02:14:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106448 conditions, 15053 events. 9054/15053 cut-off events. For 598518/598518 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 120683 event pairs, 1124 based on Foata normal form. 32/14813 useless extension candidates. Maximal degree in co-relation 106308. Up to 6962 conditions per place. [2024-06-28 02:14:26,526 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 490 selfloop transitions, 187 changer transitions 0/688 dead transitions. [2024-06-28 02:14:26,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 688 transitions, 13278 flow [2024-06-28 02:14:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:14:26,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-06-28 02:14:26,528 INFO L175 Difference]: Start difference. First operand has 289 places, 582 transitions, 10163 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:14:26,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 688 transitions, 13278 flow [2024-06-28 02:14:30,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 688 transitions, 12941 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-28 02:14:30,061 INFO L231 Difference]: Finished difference. Result has 297 places, 621 transitions, 11339 flow [2024-06-28 02:14:30,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9938, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11339, PETRI_PLACES=297, PETRI_TRANSITIONS=621} [2024-06-28 02:14:30,062 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 245 predicate places. [2024-06-28 02:14:30,062 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 621 transitions, 11339 flow [2024-06-28 02:14:30,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:30,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:30,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:30,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:14:30,063 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:30,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:30,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1147469720, now seen corresponding path program 4 times [2024-06-28 02:14:30,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:30,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709118337] [2024-06-28 02:14:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:30,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:30,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709118337] [2024-06-28 02:14:30,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709118337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:30,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:30,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:30,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541006219] [2024-06-28 02:14:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:30,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:30,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:31,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:31,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 621 transitions, 11339 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:31,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:31,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:31,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:35,700 INFO L124 PetriNetUnfolderBase]: 9156/15183 cut-off events. [2024-06-28 02:14:35,700 INFO L125 PetriNetUnfolderBase]: For 578767/578775 co-relation queries the response was YES. [2024-06-28 02:14:35,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110227 conditions, 15183 events. 9156/15183 cut-off events. For 578767/578775 co-relation queries the response was YES. Maximal size of possible extension queue 1055. Compared 121560 event pairs, 1587 based on Foata normal form. 16/14919 useless extension candidates. Maximal degree in co-relation 110083. Up to 9981 conditions per place. [2024-06-28 02:14:35,941 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 437 selfloop transitions, 246 changer transitions 0/694 dead transitions. [2024-06-28 02:14:35,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 694 transitions, 13853 flow [2024-06-28 02:14:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:14:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:14:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-28 02:14:35,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-06-28 02:14:35,942 INFO L175 Difference]: Start difference. First operand has 297 places, 621 transitions, 11339 flow. Second operand 9 states and 227 transitions. [2024-06-28 02:14:35,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 694 transitions, 13853 flow [2024-06-28 02:14:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 694 transitions, 13440 flow, removed 174 selfloop flow, removed 2 redundant places. [2024-06-28 02:14:40,168 INFO L231 Difference]: Finished difference. Result has 305 places, 640 transitions, 12072 flow [2024-06-28 02:14:40,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11068, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12072, PETRI_PLACES=305, PETRI_TRANSITIONS=640} [2024-06-28 02:14:40,169 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 253 predicate places. [2024-06-28 02:14:40,169 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 640 transitions, 12072 flow [2024-06-28 02:14:40,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:40,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:40,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:14:40,170 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:40,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash -250490230, now seen corresponding path program 1 times [2024-06-28 02:14:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:40,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985063049] [2024-06-28 02:14:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985063049] [2024-06-28 02:14:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985063049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:40,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:40,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:14:40,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987086855] [2024-06-28 02:14:40,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:40,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:14:40,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:14:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:14:41,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:41,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 640 transitions, 12072 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:41,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:41,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:41,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:46,361 INFO L124 PetriNetUnfolderBase]: 9762/16223 cut-off events. [2024-06-28 02:14:46,361 INFO L125 PetriNetUnfolderBase]: For 649881/649891 co-relation queries the response was YES. [2024-06-28 02:14:46,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118085 conditions, 16223 events. 9762/16223 cut-off events. For 649881/649891 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 132171 event pairs, 2114 based on Foata normal form. 30/15964 useless extension candidates. Maximal degree in co-relation 117938. Up to 11763 conditions per place. [2024-06-28 02:14:46,859 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 576 selfloop transitions, 135 changer transitions 0/722 dead transitions. [2024-06-28 02:14:46,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 722 transitions, 14654 flow [2024-06-28 02:14:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:14:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:14:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:14:46,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-06-28 02:14:46,861 INFO L175 Difference]: Start difference. First operand has 305 places, 640 transitions, 12072 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:14:46,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 722 transitions, 14654 flow [2024-06-28 02:14:50,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 722 transitions, 14167 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-28 02:14:50,407 INFO L231 Difference]: Finished difference. Result has 312 places, 663 transitions, 12554 flow [2024-06-28 02:14:50,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=11603, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12554, PETRI_PLACES=312, PETRI_TRANSITIONS=663} [2024-06-28 02:14:50,407 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 260 predicate places. [2024-06-28 02:14:50,407 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 663 transitions, 12554 flow [2024-06-28 02:14:50,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:50,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:50,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:50,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:14:50,408 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:14:50,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 504100232, now seen corresponding path program 1 times [2024-06-28 02:14:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:50,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782633938] [2024-06-28 02:14:50,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:50,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:50,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782633938] [2024-06-28 02:14:50,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782633938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:50,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:50,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392459062] [2024-06-28 02:14:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:50,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:50,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:50,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:14:50,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 663 transitions, 12554 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:50,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:50,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:14:50,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:55,970 INFO L124 PetriNetUnfolderBase]: 10478/17341 cut-off events. [2024-06-28 02:14:55,970 INFO L125 PetriNetUnfolderBase]: For 661545/661545 co-relation queries the response was YES. [2024-06-28 02:14:56,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126997 conditions, 17341 events. 10478/17341 cut-off events. For 661545/661545 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 141608 event pairs, 2347 based on Foata normal form. 9/17047 useless extension candidates. Maximal degree in co-relation 126845. Up to 12928 conditions per place. [2024-06-28 02:14:56,259 INFO L140 encePairwiseOnDemand]: 31/46 looper letters, 606 selfloop transitions, 147 changer transitions 0/764 dead transitions. [2024-06-28 02:14:56,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 764 transitions, 15182 flow [2024-06-28 02:14:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:14:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:14:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-28 02:14:56,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676328502415459 [2024-06-28 02:14:56,261 INFO L175 Difference]: Start difference. First operand has 312 places, 663 transitions, 12554 flow. Second operand 9 states and 235 transitions. [2024-06-28 02:14:56,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 764 transitions, 15182 flow [2024-06-28 02:15:00,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 764 transitions, 14755 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-28 02:15:00,165 INFO L231 Difference]: Finished difference. Result has 321 places, 700 transitions, 13240 flow [2024-06-28 02:15:00,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=12187, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13240, PETRI_PLACES=321, PETRI_TRANSITIONS=700} [2024-06-28 02:15:00,166 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 269 predicate places. [2024-06-28 02:15:00,166 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 700 transitions, 13240 flow [2024-06-28 02:15:00,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:00,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:00,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:00,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:15:00,167 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:00,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:00,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2063504542, now seen corresponding path program 2 times [2024-06-28 02:15:00,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:00,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694036450] [2024-06-28 02:15:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:00,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694036450] [2024-06-28 02:15:00,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694036450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:00,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:00,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:15:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277812237] [2024-06-28 02:15:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:15:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:15:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:15:00,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:15:00,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 700 transitions, 13240 flow. Second operand has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:00,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:00,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:15:00,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:05,935 INFO L124 PetriNetUnfolderBase]: 10677/17660 cut-off events. [2024-06-28 02:15:05,935 INFO L125 PetriNetUnfolderBase]: For 695514/695514 co-relation queries the response was YES. [2024-06-28 02:15:06,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130783 conditions, 17660 events. 10677/17660 cut-off events. For 695514/695514 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 144537 event pairs, 2236 based on Foata normal form. 9/17370 useless extension candidates. Maximal degree in co-relation 130627. Up to 12955 conditions per place. [2024-06-28 02:15:06,215 INFO L140 encePairwiseOnDemand]: 33/46 looper letters, 611 selfloop transitions, 150 changer transitions 0/772 dead transitions. [2024-06-28 02:15:06,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 772 transitions, 15519 flow [2024-06-28 02:15:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:15:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:15:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-28 02:15:06,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676328502415459 [2024-06-28 02:15:06,217 INFO L175 Difference]: Start difference. First operand has 321 places, 700 transitions, 13240 flow. Second operand 9 states and 235 transitions. [2024-06-28 02:15:06,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 772 transitions, 15519 flow [2024-06-28 02:15:10,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 772 transitions, 15348 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 02:15:10,180 INFO L231 Difference]: Finished difference. Result has 328 places, 707 transitions, 13601 flow [2024-06-28 02:15:10,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=13069, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13601, PETRI_PLACES=328, PETRI_TRANSITIONS=707} [2024-06-28 02:15:10,181 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 276 predicate places. [2024-06-28 02:15:10,181 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 707 transitions, 13601 flow [2024-06-28 02:15:10,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.5) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:10,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:10,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:10,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:15:10,182 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:10,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1130654538, now seen corresponding path program 3 times [2024-06-28 02:15:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:10,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826737079] [2024-06-28 02:15:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:10,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:10,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826737079] [2024-06-28 02:15:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826737079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:10,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:10,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:15:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214459865] [2024-06-28 02:15:10,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:10,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:15:10,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:15:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:15:10,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-06-28 02:15:10,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 707 transitions, 13601 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:10,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:10,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-06-28 02:15:10,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand