./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix006.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/mix006.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix006.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:03:49,353 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:03:49,428 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:03:49,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:03:49,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:03:49,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:03:49,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:03:49,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:03:49,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:03:49,459 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:03:49,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:03:49,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:03:49,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:03:49,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:03:49,461 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:03:49,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:03:49,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:03:49,462 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:03:49,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:03:49,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:03:49,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:03:49,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:03:49,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:03:49,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:03:49,463 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:03:49,463 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:03:49,464 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:03:49,464 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:03:49,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:03:49,465 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:03:49,465 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:03:49,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:03:49,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:03:49,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:03:49,466 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:03:49,466 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:03:49,467 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:03:49,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:03:49,467 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:03:49,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:03:49,467 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:03:49,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:03:49,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:03:49,468 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:03:49,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:03:49,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:03:49,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:03:49,710 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:03:49,710 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:03:49,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-05-12 13:03:50,830 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:03:51,060 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:03:51,063 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-05-12 13:03:51,075 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a1742b17/8d91a7d500114f4aa81f0b929fb9e62a/FLAGb3dc07908 [2024-05-12 13:03:51,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a1742b17/8d91a7d500114f4aa81f0b929fb9e62a [2024-05-12 13:03:51,088 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:03:51,088 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:03:51,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix006.opt.yml/witness.yml [2024-05-12 13:03:51,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:03:51,250 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:03:51,250 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:03:51,251 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:03:51,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:03:51,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:03:51" (1/2) ... [2024-05-12 13:03:51,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1d8b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:03:51, skipping insertion in model container [2024-05-12 13:03:51,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:03:51" (1/2) ... [2024-05-12 13:03:51,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c10c472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:03:51, skipping insertion in model container [2024-05-12 13:03:51,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:03:51" (2/2) ... [2024-05-12 13:03:51,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1d8b78 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51, skipping insertion in model container [2024-05-12 13:03:51,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:03:51" (2/2) ... [2024-05-12 13:03:51,258 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:03:51,329 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:03:51,330 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:03:51,330 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:03:51,330 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-05-12 13:03:51,331 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:03:51,331 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-05-12 13:03:51,367 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:03:51,486 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i[944,957] [2024-05-12 13:03:51,634 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:03:51,661 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:03:51,697 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:03:51,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:03:51,882 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:03:51,883 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51 WrapperNode [2024-05-12 13:03:51,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:03:51,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:03:51,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:03:51,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:03:51,889 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 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,904 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 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,932 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 155 [2024-05-12 13:03:51,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:03:51,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:03:51,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:03:51,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:03:51,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,950 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,971 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 13:03:51,972 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,972 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:51,987 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:03:51,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:03:51,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:03:51,988 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:03:51,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (1/1) ... [2024-05-12 13:03:52,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:03:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:03:52,046 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) [2024-05-12 13:03:52,052 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 [2024-05-12 13:03:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:03:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:03:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:03:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:03:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:03:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:03:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:03:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:03:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:03:52,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:03:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:03:52,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:03:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:03:52,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:03:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:03:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:03:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:03:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:03:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:03:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:03:52,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:03:52,080 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:03:52,218 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:03:52,220 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:03:52,562 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:03:52,562 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:03:52,716 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:03:52,717 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:03:52,717 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:03:52 BoogieIcfgContainer [2024-05-12 13:03:52,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:03:52,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:03:52,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:03:52,722 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:03:52,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:03:51" (1/4) ... [2024-05-12 13:03:52,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ff538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:03:52, skipping insertion in model container [2024-05-12 13:03:52,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:03:51" (2/4) ... [2024-05-12 13:03:52,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ff538e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:03:52, skipping insertion in model container [2024-05-12 13:03:52,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:03:51" (3/4) ... [2024-05-12 13:03:52,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46ff538e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:03:52, skipping insertion in model container [2024-05-12 13:03:52,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:03:52" (4/4) ... [2024-05-12 13:03:52,724 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006.opt.i [2024-05-12 13:03:52,736 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:03:52,737 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:03:52,737 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:03:52,773 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:03:52,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:03:52,816 INFO L124 PetriNetUnfolderBase]: 1/46 cut-off events. [2024-05-12 13:03:52,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:03:52,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 46 events. 1/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-05-12 13:03:52,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 49 transitions, 110 flow [2024-05-12 13:03:52,821 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 46 transitions, 101 flow [2024-05-12 13:03:52,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:03:52,832 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;@5123ad6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:03:52,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:03:52,835 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:03:52,835 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:03:52,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:03:52,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:03:52,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:03:52,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:03:52,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:03:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1508902457, now seen corresponding path program 1 times [2024-05-12 13:03:52,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:03:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538604375] [2024-05-12 13:03:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:03:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:03:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:03:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:03:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:03:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538604375] [2024-05-12 13:03:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538604375] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:03:53,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:03:53,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:03:53,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316214443] [2024-05-12 13:03:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:03:53,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:03:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:03:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:03:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:03:53,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-05-12 13:03:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:03:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-05-12 13:03:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:03:54,558 INFO L124 PetriNetUnfolderBase]: 3005/5068 cut-off events. [2024-05-12 13:03:54,558 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 13:03:54,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9485 conditions, 5068 events. 3005/5068 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33463 event pairs, 2435 based on Foata normal form. 151/4800 useless extension candidates. Maximal degree in co-relation 9470. Up to 4336 conditions per place. [2024-05-12 13:03:54,584 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 42 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-05-12 13:03:54,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 229 flow [2024-05-12 13:03:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:03:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:03:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-05-12 13:03:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-05-12 13:03:54,595 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 101 flow. Second operand 3 states and 100 transitions. [2024-05-12 13:03:54,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 229 flow [2024-05-12 13:03:54,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:03:54,599 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 133 flow [2024-05-12 13:03:54,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-05-12 13:03:54,602 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2024-05-12 13:03:54,603 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 133 flow [2024-05-12 13:03:54,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:54,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:03:54,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:03:54,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:03:54,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:03:54,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:03:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1643715238, now seen corresponding path program 1 times [2024-05-12 13:03:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:03:54,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211995157] [2024-05-12 13:03:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:03:54,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:03:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:03:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:03:55,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:03:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211995157] [2024-05-12 13:03:55,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211995157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:03:55,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:03:55,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:03:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963733206] [2024-05-12 13:03:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:03:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:03:55,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:03:55,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:03:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:03:55,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:03:55,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:55,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:03:55,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:03:55,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:03:55,738 INFO L124 PetriNetUnfolderBase]: 3428/5704 cut-off events. [2024-05-12 13:03:55,738 INFO L125 PetriNetUnfolderBase]: For 819/819 co-relation queries the response was YES. [2024-05-12 13:03:55,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11916 conditions, 5704 events. 3428/5704 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 37302 event pairs, 2437 based on Foata normal form. 3/5326 useless extension candidates. Maximal degree in co-relation 11901. Up to 4908 conditions per place. [2024-05-12 13:03:55,764 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 54 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-05-12 13:03:55,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 325 flow [2024-05-12 13:03:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:03:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:03:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-05-12 13:03:55,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 13:03:55,771 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 133 flow. Second operand 4 states and 126 transitions. [2024-05-12 13:03:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 325 flow [2024-05-12 13:03:55,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:03:55,774 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 179 flow [2024-05-12 13:03:55,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-05-12 13:03:55,775 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-05-12 13:03:55,775 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 179 flow [2024-05-12 13:03:55,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:55,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:03:55,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:03:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:03:55,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:03:55,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:03:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash -584434164, now seen corresponding path program 1 times [2024-05-12 13:03:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:03:55,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683683140] [2024-05-12 13:03:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:03:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:03:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:03:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:03:56,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:03:56,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683683140] [2024-05-12 13:03:56,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683683140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:03:56,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:03:56,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:03:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515036965] [2024-05-12 13:03:56,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:03:56,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:03:56,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:03:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:03:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:03:56,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:03:56,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:56,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:03:56,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:03:56,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:03:57,074 INFO L124 PetriNetUnfolderBase]: 4199/6170 cut-off events. [2024-05-12 13:03:57,075 INFO L125 PetriNetUnfolderBase]: For 2366/2366 co-relation queries the response was YES. [2024-05-12 13:03:57,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15018 conditions, 6170 events. 4199/6170 cut-off events. For 2366/2366 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35340 event pairs, 1488 based on Foata normal form. 5/5950 useless extension candidates. Maximal degree in co-relation 15001. Up to 5877 conditions per place. [2024-05-12 13:03:57,103 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 72 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-05-12 13:03:57,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 527 flow [2024-05-12 13:03:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:03:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:03:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 13:03:57,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-05-12 13:03:57,105 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 179 flow. Second operand 5 states and 160 transitions. [2024-05-12 13:03:57,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 527 flow [2024-05-12 13:03:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 104 transitions, 508 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 13:03:57,108 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 308 flow [2024-05-12 13:03:57,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-05-12 13:03:57,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-05-12 13:03:57,109 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 308 flow [2024-05-12 13:03:57,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:57,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:03:57,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:03:57,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:03:57,110 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:03:57,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:03:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 999517515, now seen corresponding path program 1 times [2024-05-12 13:03:57,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:03:57,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440807771] [2024-05-12 13:03:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:03:57,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:03:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:03:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:03:57,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:03:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440807771] [2024-05-12 13:03:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440807771] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:03:57,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:03:57,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:03:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656764669] [2024-05-12 13:03:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:03:57,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:03:57,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:03:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:03:57,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:03:57,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:03:57,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 308 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) [2024-05-12 13:03:57,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:03:57,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:03:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:03:58,583 INFO L124 PetriNetUnfolderBase]: 4243/6997 cut-off events. [2024-05-12 13:03:58,583 INFO L125 PetriNetUnfolderBase]: For 6426/6429 co-relation queries the response was YES. [2024-05-12 13:03:58,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 6997 events. 4243/6997 cut-off events. For 6426/6429 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 46488 event pairs, 1874 based on Foata normal form. 12/6540 useless extension candidates. Maximal degree in co-relation 18481. Up to 5853 conditions per place. [2024-05-12 13:03:58,619 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 80 selfloop transitions, 25 changer transitions 0/116 dead transitions. [2024-05-12 13:03:58,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 116 transitions, 668 flow [2024-05-12 13:03:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:03:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:03:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-05-12 13:03:58,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-05-12 13:03:58,621 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 308 flow. Second operand 6 states and 186 transitions. [2024-05-12 13:03:58,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 116 transitions, 668 flow [2024-05-12 13:03:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 656 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 13:03:58,626 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 383 flow [2024-05-12 13:03:58,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-05-12 13:03:58,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-05-12 13:03:58,627 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 383 flow [2024-05-12 13:03:58,627 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) [2024-05-12 13:03:58,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:03:58,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:03:58,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:03:58,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:03:58,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:03:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 507402380, now seen corresponding path program 1 times [2024-05-12 13:03:58,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:03:58,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065805364] [2024-05-12 13:03:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:03:58,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:03:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:03:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:03:59,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:03:59,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065805364] [2024-05-12 13:03:59,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065805364] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:03:59,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:03:59,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:03:59,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324046598] [2024-05-12 13:03:59,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:03:59,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:03:59,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:03:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:03:59,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:03:59,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:03:59,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:03:59,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:03:59,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:03:59,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:00,045 INFO L124 PetriNetUnfolderBase]: 4248/6376 cut-off events. [2024-05-12 13:04:00,046 INFO L125 PetriNetUnfolderBase]: For 8356/8356 co-relation queries the response was YES. [2024-05-12 13:04:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19453 conditions, 6376 events. 4248/6376 cut-off events. For 8356/8356 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 37200 event pairs, 1370 based on Foata normal form. 2/6097 useless extension candidates. Maximal degree in co-relation 19430. Up to 6056 conditions per place. [2024-05-12 13:04:00,075 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 70 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-05-12 13:04:00,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 591 flow [2024-05-12 13:04:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:04:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:04:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-05-12 13:04:00,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469387755102041 [2024-05-12 13:04:00,077 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 383 flow. Second operand 5 states and 134 transitions. [2024-05-12 13:04:00,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 591 flow [2024-05-12 13:04:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:00,085 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 343 flow [2024-05-12 13:04:00,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-05-12 13:04:00,086 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-05-12 13:04:00,086 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 343 flow [2024-05-12 13:04:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:00,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:00,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:04:00,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:00,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:00,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1451835918, now seen corresponding path program 1 times [2024-05-12 13:04:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695612215] [2024-05-12 13:04:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:00,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695612215] [2024-05-12 13:04:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695612215] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:00,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47920551] [2024-05-12 13:04:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:00,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:00,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:00,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:00,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:00,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:01,771 INFO L124 PetriNetUnfolderBase]: 4236/6395 cut-off events. [2024-05-12 13:04:01,772 INFO L125 PetriNetUnfolderBase]: For 8823/8823 co-relation queries the response was YES. [2024-05-12 13:04:01,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19145 conditions, 6395 events. 4236/6395 cut-off events. For 8823/8823 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37031 event pairs, 1266 based on Foata normal form. 4/6132 useless extension candidates. Maximal degree in co-relation 19120. Up to 6002 conditions per place. [2024-05-12 13:04:01,805 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 80 selfloop transitions, 14 changer transitions 0/105 dead transitions. [2024-05-12 13:04:01,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 629 flow [2024-05-12 13:04:01,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-05-12 13:04:01,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-05-12 13:04:01,807 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 343 flow. Second operand 6 states and 162 transitions. [2024-05-12 13:04:01,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 629 flow [2024-05-12 13:04:01,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 600 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:01,815 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 387 flow [2024-05-12 13:04:01,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-05-12 13:04:01,818 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-05-12 13:04:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 387 flow [2024-05-12 13:04:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:01,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:01,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:04:01,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:01,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1496118617, now seen corresponding path program 1 times [2024-05-12 13:04:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:01,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136772547] [2024-05-12 13:04:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:01,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:01,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136772547] [2024-05-12 13:04:01,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136772547] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:01,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:01,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:04:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520699473] [2024-05-12 13:04:01,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:01,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:04:01,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:04:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:04:01,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 49 [2024-05-12 13:04:01,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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) [2024-05-12 13:04:01,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:01,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 49 [2024-05-12 13:04:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:02,136 INFO L124 PetriNetUnfolderBase]: 1259/2533 cut-off events. [2024-05-12 13:04:02,136 INFO L125 PetriNetUnfolderBase]: For 3731/3995 co-relation queries the response was YES. [2024-05-12 13:04:02,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6305 conditions, 2533 events. 1259/2533 cut-off events. For 3731/3995 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19089 event pairs, 225 based on Foata normal form. 7/2337 useless extension candidates. Maximal degree in co-relation 6280. Up to 1528 conditions per place. [2024-05-12 13:04:02,148 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 28 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2024-05-12 13:04:02,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 74 transitions, 411 flow [2024-05-12 13:04:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:04:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:04:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-05-12 13:04:02,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7210884353741497 [2024-05-12 13:04:02,150 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 387 flow. Second operand 3 states and 106 transitions. [2024-05-12 13:04:02,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 74 transitions, 411 flow [2024-05-12 13:04:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 74 transitions, 381 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:02,153 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 309 flow [2024-05-12 13:04:02,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-05-12 13:04:02,154 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-05-12 13:04:02,154 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 309 flow [2024-05-12 13:04:02,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 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) [2024-05-12 13:04:02,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:02,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:04:02,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:02,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash 26952841, now seen corresponding path program 1 times [2024-05-12 13:04:02,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:02,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212332913] [2024-05-12 13:04:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:02,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212332913] [2024-05-12 13:04:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212332913] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:02,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:02,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275337467] [2024-05-12 13:04:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:02,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:02,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:02,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:02,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:02,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:03,712 INFO L124 PetriNetUnfolderBase]: 4404/6442 cut-off events. [2024-05-12 13:04:03,712 INFO L125 PetriNetUnfolderBase]: For 13816/13822 co-relation queries the response was YES. [2024-05-12 13:04:03,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20235 conditions, 6442 events. 4404/6442 cut-off events. For 13816/13822 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 35559 event pairs, 1320 based on Foata normal form. 8/6440 useless extension candidates. Maximal degree in co-relation 20211. Up to 6043 conditions per place. [2024-05-12 13:04:03,777 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 82 selfloop transitions, 30 changer transitions 5/127 dead transitions. [2024-05-12 13:04:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 789 flow [2024-05-12 13:04:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 13:04:03,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2024-05-12 13:04:03,780 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 309 flow. Second operand 7 states and 190 transitions. [2024-05-12 13:04:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 789 flow [2024-05-12 13:04:03,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 127 transitions, 763 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:04:03,789 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 482 flow [2024-05-12 13:04:03,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=482, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-05-12 13:04:03,791 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-05-12 13:04:03,791 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 482 flow [2024-05-12 13:04:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:03,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:03,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:03,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:04:03,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:03,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 874430089, now seen corresponding path program 2 times [2024-05-12 13:04:03,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:03,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304650191] [2024-05-12 13:04:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:03,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:04,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:04,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304650191] [2024-05-12 13:04:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304650191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299526395] [2024-05-12 13:04:04,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:04,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:04,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 482 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:05,342 INFO L124 PetriNetUnfolderBase]: 3886/5714 cut-off events. [2024-05-12 13:04:05,343 INFO L125 PetriNetUnfolderBase]: For 14201/14209 co-relation queries the response was YES. [2024-05-12 13:04:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19039 conditions, 5714 events. 3886/5714 cut-off events. For 14201/14209 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 31206 event pairs, 1198 based on Foata normal form. 10/5713 useless extension candidates. Maximal degree in co-relation 19011. Up to 5317 conditions per place. [2024-05-12 13:04:05,372 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 75 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-05-12 13:04:05,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 119 transitions, 876 flow [2024-05-12 13:04:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-05-12 13:04:05,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2024-05-12 13:04:05,373 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 482 flow. Second operand 6 states and 157 transitions. [2024-05-12 13:04:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 119 transitions, 876 flow [2024-05-12 13:04:05,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 119 transitions, 837 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:05,385 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 582 flow [2024-05-12 13:04:05,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-05-12 13:04:05,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-05-12 13:04:05,386 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 582 flow [2024-05-12 13:04:05,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:05,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:05,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:05,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:04:05,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:05,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2012560917, now seen corresponding path program 3 times [2024-05-12 13:04:05,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:05,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061804251] [2024-05-12 13:04:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:05,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:06,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:06,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061804251] [2024-05-12 13:04:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061804251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:06,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:06,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838879773] [2024-05-12 13:04:06,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:06,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:06,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:06,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 582 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:06,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:06,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:06,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:06,824 INFO L124 PetriNetUnfolderBase]: 3869/5684 cut-off events. [2024-05-12 13:04:06,824 INFO L125 PetriNetUnfolderBase]: For 16510/16512 co-relation queries the response was YES. [2024-05-12 13:04:06,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19306 conditions, 5684 events. 3869/5684 cut-off events. For 16510/16512 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 30943 event pairs, 1212 based on Foata normal form. 3/5665 useless extension candidates. Maximal degree in co-relation 19277. Up to 5296 conditions per place. [2024-05-12 13:04:06,865 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 71 selfloop transitions, 35 changer transitions 0/116 dead transitions. [2024-05-12 13:04:06,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 890 flow [2024-05-12 13:04:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:04:06,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-05-12 13:04:06,867 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 582 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:04:06,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 890 flow [2024-05-12 13:04:06,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 837 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:06,887 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 609 flow [2024-05-12 13:04:06,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-05-12 13:04:06,888 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-05-12 13:04:06,888 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 609 flow [2024-05-12 13:04:06,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:06,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:06,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:06,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:04:06,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:06,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:06,889 INFO L85 PathProgramCache]: Analyzing trace with hash 73313521, now seen corresponding path program 1 times [2024-05-12 13:04:06,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513889490] [2024-05-12 13:04:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:06,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513889490] [2024-05-12 13:04:07,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513889490] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:07,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:07,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745623188] [2024-05-12 13:04:07,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:07,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:07,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:07,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 609 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:07,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:07,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:07,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:08,830 INFO L124 PetriNetUnfolderBase]: 3961/5836 cut-off events. [2024-05-12 13:04:08,831 INFO L125 PetriNetUnfolderBase]: For 17406/17414 co-relation queries the response was YES. [2024-05-12 13:04:08,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19842 conditions, 5836 events. 3961/5836 cut-off events. For 17406/17414 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32052 event pairs, 996 based on Foata normal form. 9/5831 useless extension candidates. Maximal degree in co-relation 19812. Up to 5136 conditions per place. [2024-05-12 13:04:08,865 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 89 selfloop transitions, 39 changer transitions 0/138 dead transitions. [2024-05-12 13:04:08,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 1075 flow [2024-05-12 13:04:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 13:04:08,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451895043731778 [2024-05-12 13:04:08,867 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 609 flow. Second operand 7 states and 187 transitions. [2024-05-12 13:04:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 1075 flow [2024-05-12 13:04:08,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 138 transitions, 960 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:08,883 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 637 flow [2024-05-12 13:04:08,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=637, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-05-12 13:04:08,884 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-05-12 13:04:08,884 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 637 flow [2024-05-12 13:04:08,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:08,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:08,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:08,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:04:08,885 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:08,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2035121999, now seen corresponding path program 2 times [2024-05-12 13:04:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:08,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430566718] [2024-05-12 13:04:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430566718] [2024-05-12 13:04:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430566718] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:09,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:09,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621326374] [2024-05-12 13:04:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:09,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:09,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:09,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:09,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 637 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:09,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:09,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:10,599 INFO L124 PetriNetUnfolderBase]: 4007/5898 cut-off events. [2024-05-12 13:04:10,599 INFO L125 PetriNetUnfolderBase]: For 20905/20907 co-relation queries the response was YES. [2024-05-12 13:04:10,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21346 conditions, 5898 events. 4007/5898 cut-off events. For 20905/20907 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32388 event pairs, 1006 based on Foata normal form. 4/5876 useless extension candidates. Maximal degree in co-relation 21315. Up to 5157 conditions per place. [2024-05-12 13:04:10,628 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 91 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2024-05-12 13:04:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1175 flow [2024-05-12 13:04:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 13:04:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481049562682215 [2024-05-12 13:04:10,630 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 637 flow. Second operand 7 states and 188 transitions. [2024-05-12 13:04:10,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1175 flow [2024-05-12 13:04:10,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 1132 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:10,647 INFO L231 Difference]: Finished difference. Result has 85 places, 99 transitions, 751 flow [2024-05-12 13:04:10,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=751, PETRI_PLACES=85, PETRI_TRANSITIONS=99} [2024-05-12 13:04:10,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-05-12 13:04:10,647 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 99 transitions, 751 flow [2024-05-12 13:04:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:10,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:10,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:04:10,648 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:10,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1514898639, now seen corresponding path program 3 times [2024-05-12 13:04:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:10,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114146811] [2024-05-12 13:04:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:11,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114146811] [2024-05-12 13:04:11,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114146811] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:11,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:11,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300408990] [2024-05-12 13:04:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:11,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:11,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:11,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:11,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 99 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:11,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:11,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:11,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:12,432 INFO L124 PetriNetUnfolderBase]: 3997/5884 cut-off events. [2024-05-12 13:04:12,432 INFO L125 PetriNetUnfolderBase]: For 24435/24437 co-relation queries the response was YES. [2024-05-12 13:04:12,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22071 conditions, 5884 events. 3997/5884 cut-off events. For 24435/24437 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32406 event pairs, 1006 based on Foata normal form. 4/5862 useless extension candidates. Maximal degree in co-relation 22038. Up to 5153 conditions per place. [2024-05-12 13:04:12,459 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 83 selfloop transitions, 48 changer transitions 0/141 dead transitions. [2024-05-12 13:04:12,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 141 transitions, 1173 flow [2024-05-12 13:04:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:04:12,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393586005830904 [2024-05-12 13:04:12,462 INFO L175 Difference]: Start difference. First operand has 85 places, 99 transitions, 751 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:04:12,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 141 transitions, 1173 flow [2024-05-12 13:04:12,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 141 transitions, 1115 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 13:04:12,489 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 797 flow [2024-05-12 13:04:12,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=797, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-05-12 13:04:12,490 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-05-12 13:04:12,490 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 797 flow [2024-05-12 13:04:12,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:12,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:12,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:12,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:04:12,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:12,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1042932733, now seen corresponding path program 1 times [2024-05-12 13:04:12,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:12,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177744859] [2024-05-12 13:04:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:12,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:13,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:13,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177744859] [2024-05-12 13:04:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177744859] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:13,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:13,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:04:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217257771] [2024-05-12 13:04:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:04:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:04:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:04:13,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:04:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 797 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:13,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:13,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:04:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:13,812 INFO L124 PetriNetUnfolderBase]: 3253/5452 cut-off events. [2024-05-12 13:04:13,813 INFO L125 PetriNetUnfolderBase]: For 22943/22955 co-relation queries the response was YES. [2024-05-12 13:04:13,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19391 conditions, 5452 events. 3253/5452 cut-off events. For 22943/22955 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 35249 event pairs, 1248 based on Foata normal form. 3/5344 useless extension candidates. Maximal degree in co-relation 19355. Up to 4642 conditions per place. [2024-05-12 13:04:13,847 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 90 selfloop transitions, 9 changer transitions 0/120 dead transitions. [2024-05-12 13:04:13,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1088 flow [2024-05-12 13:04:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:04:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:04:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-05-12 13:04:13,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2024-05-12 13:04:13,849 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 797 flow. Second operand 5 states and 127 transitions. [2024-05-12 13:04:13,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1088 flow [2024-05-12 13:04:13,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 954 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 13:04:13,871 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 759 flow [2024-05-12 13:04:13,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=759, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-05-12 13:04:13,872 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-05-12 13:04:13,872 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 759 flow [2024-05-12 13:04:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:13,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:13,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:13,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:04:13,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:13,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash 702095127, now seen corresponding path program 1 times [2024-05-12 13:04:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:13,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409874783] [2024-05-12 13:04:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:14,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:14,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409874783] [2024-05-12 13:04:14,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409874783] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:14,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:14,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:14,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008664811] [2024-05-12 13:04:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:14,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:14,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:14,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 759 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:14,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:14,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:14,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:15,769 INFO L124 PetriNetUnfolderBase]: 4045/6532 cut-off events. [2024-05-12 13:04:15,770 INFO L125 PetriNetUnfolderBase]: For 28993/29002 co-relation queries the response was YES. [2024-05-12 13:04:15,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23617 conditions, 6532 events. 4045/6532 cut-off events. For 28993/29002 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40310 event pairs, 1166 based on Foata normal form. 10/6349 useless extension candidates. Maximal degree in co-relation 23580. Up to 5195 conditions per place. [2024-05-12 13:04:15,807 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 98 selfloop transitions, 49 changer transitions 0/157 dead transitions. [2024-05-12 13:04:15,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1279 flow [2024-05-12 13:04:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 13:04:15,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568513119533528 [2024-05-12 13:04:15,809 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 759 flow. Second operand 7 states and 191 transitions. [2024-05-12 13:04:15,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1279 flow [2024-05-12 13:04:15,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 157 transitions, 1256 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 13:04:15,834 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 875 flow [2024-05-12 13:04:15,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=875, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2024-05-12 13:04:15,835 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-05-12 13:04:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 875 flow [2024-05-12 13:04:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:15,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:15,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:15,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:04:15,836 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:15,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:15,836 INFO L85 PathProgramCache]: Analyzing trace with hash 702100707, now seen corresponding path program 2 times [2024-05-12 13:04:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136409157] [2024-05-12 13:04:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:16,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136409157] [2024-05-12 13:04:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136409157] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:16,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709476801] [2024-05-12 13:04:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:16,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:16,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:16,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:16,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:16,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:16,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:17,805 INFO L124 PetriNetUnfolderBase]: 4091/6593 cut-off events. [2024-05-12 13:04:17,806 INFO L125 PetriNetUnfolderBase]: For 33537/33542 co-relation queries the response was YES. [2024-05-12 13:04:17,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24696 conditions, 6593 events. 4091/6593 cut-off events. For 33537/33542 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40665 event pairs, 1165 based on Foata normal form. 4/6404 useless extension candidates. Maximal degree in co-relation 24657. Up to 5234 conditions per place. [2024-05-12 13:04:17,846 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 104 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-05-12 13:04:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 165 transitions, 1433 flow [2024-05-12 13:04:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 13:04:17,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-05-12 13:04:17,848 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 875 flow. Second operand 8 states and 212 transitions. [2024-05-12 13:04:17,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 165 transitions, 1433 flow [2024-05-12 13:04:17,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 165 transitions, 1279 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:17,881 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 869 flow [2024-05-12 13:04:17,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=869, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2024-05-12 13:04:17,881 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-05-12 13:04:17,882 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 869 flow [2024-05-12 13:04:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:17,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:17,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:17,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:04:17,882 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:17,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1328375021, now seen corresponding path program 3 times [2024-05-12 13:04:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:17,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058658473] [2024-05-12 13:04:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058658473] [2024-05-12 13:04:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058658473] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:18,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:18,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321329575] [2024-05-12 13:04:18,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:18,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:18,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 869 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:18,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:18,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:18,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:19,886 INFO L124 PetriNetUnfolderBase]: 4137/6261 cut-off events. [2024-05-12 13:04:19,887 INFO L125 PetriNetUnfolderBase]: For 35145/35147 co-relation queries the response was YES. [2024-05-12 13:04:19,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24743 conditions, 6261 events. 4137/6261 cut-off events. For 35145/35147 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36039 event pairs, 1043 based on Foata normal form. 4/6201 useless extension candidates. Maximal degree in co-relation 24704. Up to 5273 conditions per place. [2024-05-12 13:04:19,932 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 106 selfloop transitions, 59 changer transitions 0/175 dead transitions. [2024-05-12 13:04:19,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 175 transitions, 1468 flow [2024-05-12 13:04:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:04:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:04:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:04:19,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328798185941043 [2024-05-12 13:04:19,934 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 869 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:04:19,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 175 transitions, 1468 flow [2024-05-12 13:04:19,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 175 transitions, 1381 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 13:04:19,973 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 943 flow [2024-05-12 13:04:19,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=943, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-05-12 13:04:19,973 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-05-12 13:04:19,974 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 943 flow [2024-05-12 13:04:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:19,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:19,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:04:19,974 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1971121591, now seen corresponding path program 4 times [2024-05-12 13:04:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548863970] [2024-05-12 13:04:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:19,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548863970] [2024-05-12 13:04:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548863970] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:20,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:20,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111278792] [2024-05-12 13:04:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:20,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:20,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:20,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:20,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:20,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:20,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:22,087 INFO L124 PetriNetUnfolderBase]: 4127/6241 cut-off events. [2024-05-12 13:04:22,088 INFO L125 PetriNetUnfolderBase]: For 38917/38919 co-relation queries the response was YES. [2024-05-12 13:04:22,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24926 conditions, 6241 events. 4127/6241 cut-off events. For 38917/38919 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35852 event pairs, 1073 based on Foata normal form. 4/6172 useless extension candidates. Maximal degree in co-relation 24886. Up to 5265 conditions per place. [2024-05-12 13:04:22,142 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 101 selfloop transitions, 56 changer transitions 0/167 dead transitions. [2024-05-12 13:04:22,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 1421 flow [2024-05-12 13:04:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 13:04:22,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331632653061225 [2024-05-12 13:04:22,145 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 943 flow. Second operand 8 states and 209 transitions. [2024-05-12 13:04:22,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 1421 flow [2024-05-12 13:04:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 167 transitions, 1263 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-05-12 13:04:22,196 INFO L231 Difference]: Finished difference. Result has 101 places, 115 transitions, 905 flow [2024-05-12 13:04:22,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=905, PETRI_PLACES=101, PETRI_TRANSITIONS=115} [2024-05-12 13:04:22,197 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-05-12 13:04:22,197 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 115 transitions, 905 flow [2024-05-12 13:04:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:22,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:22,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:22,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:04:22,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:22,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1322151514, now seen corresponding path program 1 times [2024-05-12 13:04:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:22,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176391272] [2024-05-12 13:04:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:22,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:23,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:23,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176391272] [2024-05-12 13:04:23,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176391272] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:23,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:23,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864721059] [2024-05-12 13:04:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:23,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:23,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:23,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 115 transitions, 905 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:23,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:23,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:24,385 INFO L124 PetriNetUnfolderBase]: 3596/5928 cut-off events. [2024-05-12 13:04:24,386 INFO L125 PetriNetUnfolderBase]: For 35294/35296 co-relation queries the response was YES. [2024-05-12 13:04:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22509 conditions, 5928 events. 3596/5928 cut-off events. For 35294/35296 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 37724 event pairs, 1246 based on Foata normal form. 4/5815 useless extension candidates. Maximal degree in co-relation 22468. Up to 5076 conditions per place. [2024-05-12 13:04:24,421 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 133 selfloop transitions, 19 changer transitions 0/163 dead transitions. [2024-05-12 13:04:24,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1380 flow [2024-05-12 13:04:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:04:24,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-05-12 13:04:24,423 INFO L175 Difference]: Start difference. First operand has 101 places, 115 transitions, 905 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:04:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1380 flow [2024-05-12 13:04:24,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 163 transitions, 1228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 13:04:24,457 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 851 flow [2024-05-12 13:04:24,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-05-12 13:04:24,457 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-05-12 13:04:24,457 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 851 flow [2024-05-12 13:04:24,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:24,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:24,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:24,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:04:24,458 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:24,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2028821811, now seen corresponding path program 1 times [2024-05-12 13:04:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134419789] [2024-05-12 13:04:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:24,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134419789] [2024-05-12 13:04:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134419789] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:25,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:25,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:25,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284885804] [2024-05-12 13:04:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:25,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:25,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 13:04:25,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:25,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:25,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 13:04:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:26,263 INFO L124 PetriNetUnfolderBase]: 3370/5676 cut-off events. [2024-05-12 13:04:26,264 INFO L125 PetriNetUnfolderBase]: For 36839/36853 co-relation queries the response was YES. [2024-05-12 13:04:26,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21681 conditions, 5676 events. 3370/5676 cut-off events. For 36839/36853 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36964 event pairs, 1225 based on Foata normal form. 5/5565 useless extension candidates. Maximal degree in co-relation 21638. Up to 4793 conditions per place. [2024-05-12 13:04:26,292 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 109 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-05-12 13:04:26,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1175 flow [2024-05-12 13:04:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-05-12 13:04:26,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:04:26,294 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 851 flow. Second operand 6 states and 150 transitions. [2024-05-12 13:04:26,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1175 flow [2024-05-12 13:04:26,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1122 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 13:04:26,323 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 860 flow [2024-05-12 13:04:26,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2024-05-12 13:04:26,323 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-05-12 13:04:26,324 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 860 flow [2024-05-12 13:04:26,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:26,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:26,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:04:26,324 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:26,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:26,325 INFO L85 PathProgramCache]: Analyzing trace with hash 171960384, now seen corresponding path program 1 times [2024-05-12 13:04:26,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:26,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468102170] [2024-05-12 13:04:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468102170] [2024-05-12 13:04:27,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468102170] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:27,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:27,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:27,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816260881] [2024-05-12 13:04:27,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:27,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:27,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:27,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:27,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:27,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:27,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:27,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:27,957 INFO L124 PetriNetUnfolderBase]: 4160/6489 cut-off events. [2024-05-12 13:04:27,958 INFO L125 PetriNetUnfolderBase]: For 48389/48394 co-relation queries the response was YES. [2024-05-12 13:04:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26223 conditions, 6489 events. 4160/6489 cut-off events. For 48389/48394 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 38787 event pairs, 865 based on Foata normal form. 6/6375 useless extension candidates. Maximal degree in co-relation 26179. Up to 5506 conditions per place. [2024-05-12 13:04:27,990 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 121 selfloop transitions, 37 changer transitions 0/168 dead transitions. [2024-05-12 13:04:27,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 168 transitions, 1408 flow [2024-05-12 13:04:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 13:04:27,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276967930029155 [2024-05-12 13:04:27,992 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 860 flow. Second operand 7 states and 181 transitions. [2024-05-12 13:04:27,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 168 transitions, 1408 flow [2024-05-12 13:04:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 1368 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:28,032 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 949 flow [2024-05-12 13:04:28,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=949, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2024-05-12 13:04:28,033 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-05-12 13:04:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 949 flow [2024-05-12 13:04:28,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:28,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:28,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:28,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:04:28,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1052838902, now seen corresponding path program 2 times [2024-05-12 13:04:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:28,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576339750] [2024-05-12 13:04:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:28,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:28,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576339750] [2024-05-12 13:04:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576339750] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:28,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:28,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:28,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227888506] [2024-05-12 13:04:28,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:28,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:28,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:28,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:28,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 949 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:28,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:28,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:28,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:29,837 INFO L124 PetriNetUnfolderBase]: 4152/6476 cut-off events. [2024-05-12 13:04:29,837 INFO L125 PetriNetUnfolderBase]: For 52783/52788 co-relation queries the response was YES. [2024-05-12 13:04:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26845 conditions, 6476 events. 4152/6476 cut-off events. For 52783/52788 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 38748 event pairs, 1155 based on Foata normal form. 6/6360 useless extension candidates. Maximal degree in co-relation 26800. Up to 5642 conditions per place. [2024-05-12 13:04:29,877 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 119 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2024-05-12 13:04:29,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 1389 flow [2024-05-12 13:04:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 13:04:29,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521865889212828 [2024-05-12 13:04:29,879 INFO L175 Difference]: Start difference. First operand has 106 places, 127 transitions, 949 flow. Second operand 7 states and 179 transitions. [2024-05-12 13:04:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 1389 flow [2024-05-12 13:04:29,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 167 transitions, 1323 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:29,961 INFO L231 Difference]: Finished difference. Result has 110 places, 127 transitions, 968 flow [2024-05-12 13:04:29,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=968, PETRI_PLACES=110, PETRI_TRANSITIONS=127} [2024-05-12 13:04:29,962 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-05-12 13:04:29,962 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 127 transitions, 968 flow [2024-05-12 13:04:29,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:29,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:29,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:04:29,963 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:29,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:29,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1518609372, now seen corresponding path program 1 times [2024-05-12 13:04:29,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:29,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786471489] [2024-05-12 13:04:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:29,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:30,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:30,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786471489] [2024-05-12 13:04:30,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786471489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:30,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984616501] [2024-05-12 13:04:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:30,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:30,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 127 transitions, 968 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:30,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:30,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:31,545 INFO L124 PetriNetUnfolderBase]: 3903/6394 cut-off events. [2024-05-12 13:04:31,546 INFO L125 PetriNetUnfolderBase]: For 55719/55729 co-relation queries the response was YES. [2024-05-12 13:04:31,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26032 conditions, 6394 events. 3903/6394 cut-off events. For 55719/55729 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41154 event pairs, 1391 based on Foata normal form. 11/6264 useless extension candidates. Maximal degree in co-relation 25985. Up to 5527 conditions per place. [2024-05-12 13:04:31,595 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 124 selfloop transitions, 15 changer transitions 0/161 dead transitions. [2024-05-12 13:04:31,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 161 transitions, 1412 flow [2024-05-12 13:04:31,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-05-12 13:04:31,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 13:04:31,597 INFO L175 Difference]: Start difference. First operand has 110 places, 127 transitions, 968 flow. Second operand 6 states and 150 transitions. [2024-05-12 13:04:31,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 161 transitions, 1412 flow [2024-05-12 13:04:31,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 161 transitions, 1319 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:31,642 INFO L231 Difference]: Finished difference. Result has 111 places, 136 transitions, 1019 flow [2024-05-12 13:04:31,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1019, PETRI_PLACES=111, PETRI_TRANSITIONS=136} [2024-05-12 13:04:31,643 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-05-12 13:04:31,643 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 136 transitions, 1019 flow [2024-05-12 13:04:31,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:31,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:31,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:31,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:04:31,644 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:31,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1531019292, now seen corresponding path program 2 times [2024-05-12 13:04:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:31,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685667804] [2024-05-12 13:04:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:32,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685667804] [2024-05-12 13:04:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685667804] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:32,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057961298] [2024-05-12 13:04:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:32,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:32,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 136 transitions, 1019 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:32,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:32,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:32,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:33,188 INFO L124 PetriNetUnfolderBase]: 3907/6402 cut-off events. [2024-05-12 13:04:33,188 INFO L125 PetriNetUnfolderBase]: For 61099/61133 co-relation queries the response was YES. [2024-05-12 13:04:33,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26911 conditions, 6402 events. 3907/6402 cut-off events. For 61099/61133 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41228 event pairs, 1392 based on Foata normal form. 25/6282 useless extension candidates. Maximal degree in co-relation 26862. Up to 5510 conditions per place. [2024-05-12 13:04:33,238 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 119 selfloop transitions, 20 changer transitions 0/161 dead transitions. [2024-05-12 13:04:33,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 161 transitions, 1407 flow [2024-05-12 13:04:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-05-12 13:04:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:04:33,240 INFO L175 Difference]: Start difference. First operand has 111 places, 136 transitions, 1019 flow. Second operand 6 states and 147 transitions. [2024-05-12 13:04:33,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 161 transitions, 1407 flow [2024-05-12 13:04:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 161 transitions, 1367 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:33,299 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1063 flow [2024-05-12 13:04:33,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-05-12 13:04:33,300 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-05-12 13:04:33,300 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1063 flow [2024-05-12 13:04:33,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:33,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:33,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:33,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:04:33,301 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:33,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1524329244, now seen corresponding path program 1 times [2024-05-12 13:04:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892324257] [2024-05-12 13:04:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892324257] [2024-05-12 13:04:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892324257] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:34,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:34,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836887335] [2024-05-12 13:04:34,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:34,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:34,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1063 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:34,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:34,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:34,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:34,809 INFO L124 PetriNetUnfolderBase]: 3663/6046 cut-off events. [2024-05-12 13:04:34,810 INFO L125 PetriNetUnfolderBase]: For 58068/58070 co-relation queries the response was YES. [2024-05-12 13:04:34,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26184 conditions, 6046 events. 3663/6046 cut-off events. For 58068/58070 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 38596 event pairs, 1216 based on Foata normal form. 1/5924 useless extension candidates. Maximal degree in co-relation 26134. Up to 5236 conditions per place. [2024-05-12 13:04:34,853 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 142 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2024-05-12 13:04:34,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 166 transitions, 1499 flow [2024-05-12 13:04:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-05-12 13:04:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:04:34,855 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1063 flow. Second operand 6 states and 147 transitions. [2024-05-12 13:04:34,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 166 transitions, 1499 flow [2024-05-12 13:04:34,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 166 transitions, 1437 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:34,915 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1116 flow [2024-05-12 13:04:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1116, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-05-12 13:04:34,915 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-05-12 13:04:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1116 flow [2024-05-12 13:04:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:34,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:34,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:34,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:04:34,916 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:34,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1531025244, now seen corresponding path program 2 times [2024-05-12 13:04:34,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177792022] [2024-05-12 13:04:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177792022] [2024-05-12 13:04:35,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177792022] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:35,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:04:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439077693] [2024-05-12 13:04:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:35,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:04:35,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:04:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:04:35,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:35,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1116 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:35,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:35,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:35,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:36,463 INFO L124 PetriNetUnfolderBase]: 3665/6138 cut-off events. [2024-05-12 13:04:36,463 INFO L125 PetriNetUnfolderBase]: For 62994/63002 co-relation queries the response was YES. [2024-05-12 13:04:36,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27133 conditions, 6138 events. 3665/6138 cut-off events. For 62994/63002 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 39933 event pairs, 1212 based on Foata normal form. 5/5995 useless extension candidates. Maximal degree in co-relation 27081. Up to 5219 conditions per place. [2024-05-12 13:04:36,507 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 139 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-05-12 13:04:36,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 1530 flow [2024-05-12 13:04:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:04:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:04:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-05-12 13:04:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:04:36,508 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1116 flow. Second operand 6 states and 147 transitions. [2024-05-12 13:04:36,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 1530 flow [2024-05-12 13:04:36,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1485 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:36,583 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1155 flow [2024-05-12 13:04:36,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1155, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-05-12 13:04:36,584 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-05-12 13:04:36,584 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1155 flow [2024-05-12 13:04:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:36,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:04:36,585 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:36,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1723605370, now seen corresponding path program 1 times [2024-05-12 13:04:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862495017] [2024-05-12 13:04:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:37,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862495017] [2024-05-12 13:04:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862495017] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:37,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:37,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230577276] [2024-05-12 13:04:37,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:37,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:37,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:37,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1155 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:37,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:37,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:37,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:38,542 INFO L124 PetriNetUnfolderBase]: 4478/7376 cut-off events. [2024-05-12 13:04:38,542 INFO L125 PetriNetUnfolderBase]: For 93063/93071 co-relation queries the response was YES. [2024-05-12 13:04:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33684 conditions, 7376 events. 4478/7376 cut-off events. For 93063/93071 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 47751 event pairs, 929 based on Foata normal form. 17/7198 useless extension candidates. Maximal degree in co-relation 33631. Up to 4944 conditions per place. [2024-05-12 13:04:38,592 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 143 selfloop transitions, 57 changer transitions 0/210 dead transitions. [2024-05-12 13:04:38,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 1887 flow [2024-05-12 13:04:38,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 13:04:38,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-05-12 13:04:38,594 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1155 flow. Second operand 8 states and 216 transitions. [2024-05-12 13:04:38,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 1887 flow [2024-05-12 13:04:38,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 210 transitions, 1825 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:38,655 INFO L231 Difference]: Finished difference. Result has 124 places, 151 transitions, 1251 flow [2024-05-12 13:04:38,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=124, PETRI_TRANSITIONS=151} [2024-05-12 13:04:38,656 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-05-12 13:04:38,656 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 151 transitions, 1251 flow [2024-05-12 13:04:38,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:38,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:38,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:38,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:04:38,656 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:38,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1785935298, now seen corresponding path program 2 times [2024-05-12 13:04:38,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:38,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337965478] [2024-05-12 13:04:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:38,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:39,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337965478] [2024-05-12 13:04:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337965478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:39,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:39,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499097356] [2024-05-12 13:04:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:39,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:39,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:39,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 151 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:39,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:39,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:39,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:40,747 INFO L124 PetriNetUnfolderBase]: 4682/7595 cut-off events. [2024-05-12 13:04:40,747 INFO L125 PetriNetUnfolderBase]: For 104345/104353 co-relation queries the response was YES. [2024-05-12 13:04:40,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35970 conditions, 7595 events. 4682/7595 cut-off events. For 104345/104353 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 49127 event pairs, 1394 based on Foata normal form. 25/7451 useless extension candidates. Maximal degree in co-relation 35916. Up to 5856 conditions per place. [2024-05-12 13:04:40,801 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 133 selfloop transitions, 64 changer transitions 0/207 dead transitions. [2024-05-12 13:04:40,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 207 transitions, 1873 flow [2024-05-12 13:04:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 13:04:40,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433673469387755 [2024-05-12 13:04:40,803 INFO L175 Difference]: Start difference. First operand has 124 places, 151 transitions, 1251 flow. Second operand 8 states and 213 transitions. [2024-05-12 13:04:40,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 207 transitions, 1873 flow [2024-05-12 13:04:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 207 transitions, 1801 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:40,874 INFO L231 Difference]: Finished difference. Result has 128 places, 153 transitions, 1351 flow [2024-05-12 13:04:40,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=128, PETRI_TRANSITIONS=153} [2024-05-12 13:04:40,875 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-05-12 13:04:40,875 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 153 transitions, 1351 flow [2024-05-12 13:04:40,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:04:40,876 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:40,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1872623388, now seen corresponding path program 3 times [2024-05-12 13:04:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:40,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8551572] [2024-05-12 13:04:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:40,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:41,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:41,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8551572] [2024-05-12 13:04:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8551572] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:41,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270305385] [2024-05-12 13:04:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:41,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:41,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:41,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:41,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 153 transitions, 1351 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:41,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:41,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:41,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:43,074 INFO L124 PetriNetUnfolderBase]: 4812/7813 cut-off events. [2024-05-12 13:04:43,075 INFO L125 PetriNetUnfolderBase]: For 112120/112128 co-relation queries the response was YES. [2024-05-12 13:04:43,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38015 conditions, 7813 events. 4812/7813 cut-off events. For 112120/112128 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 50876 event pairs, 1396 based on Foata normal form. 17/7661 useless extension candidates. Maximal degree in co-relation 37959. Up to 5836 conditions per place. [2024-05-12 13:04:43,137 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 138 selfloop transitions, 64 changer transitions 0/212 dead transitions. [2024-05-12 13:04:43,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 212 transitions, 1987 flow [2024-05-12 13:04:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 13:04:43,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-05-12 13:04:43,138 INFO L175 Difference]: Start difference. First operand has 128 places, 153 transitions, 1351 flow. Second operand 8 states and 216 transitions. [2024-05-12 13:04:43,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 212 transitions, 1987 flow [2024-05-12 13:04:43,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 212 transitions, 1843 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:43,235 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1365 flow [2024-05-12 13:04:43,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1365, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-05-12 13:04:43,236 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-05-12 13:04:43,236 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1365 flow [2024-05-12 13:04:43,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:43,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:43,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:04:43,237 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:43,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -167760414, now seen corresponding path program 1 times [2024-05-12 13:04:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54404280] [2024-05-12 13:04:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:43,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:43,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54404280] [2024-05-12 13:04:43,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54404280] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:43,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:43,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:43,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980807130] [2024-05-12 13:04:43,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:43,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:43,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:44,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:44,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1365 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:44,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:44,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:44,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:45,115 INFO L124 PetriNetUnfolderBase]: 4846/7903 cut-off events. [2024-05-12 13:04:45,116 INFO L125 PetriNetUnfolderBase]: For 113624/113640 co-relation queries the response was YES. [2024-05-12 13:04:45,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38283 conditions, 7903 events. 4846/7903 cut-off events. For 113624/113640 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 52083 event pairs, 1615 based on Foata normal form. 16/7741 useless extension candidates. Maximal degree in co-relation 38226. Up to 6786 conditions per place. [2024-05-12 13:04:45,184 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 164 selfloop transitions, 43 changer transitions 0/217 dead transitions. [2024-05-12 13:04:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 217 transitions, 2236 flow [2024-05-12 13:04:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:04:45,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-05-12 13:04:45,192 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1365 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:04:45,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 217 transitions, 2236 flow [2024-05-12 13:04:45,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 217 transitions, 2064 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:45,300 INFO L231 Difference]: Finished difference. Result has 133 places, 184 transitions, 1730 flow [2024-05-12 13:04:45,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1730, PETRI_PLACES=133, PETRI_TRANSITIONS=184} [2024-05-12 13:04:45,304 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-05-12 13:04:45,304 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 184 transitions, 1730 flow [2024-05-12 13:04:45,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:45,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:45,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:04:45,305 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:45,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1938986660, now seen corresponding path program 4 times [2024-05-12 13:04:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:45,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752723338] [2024-05-12 13:04:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:45,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:46,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:46,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752723338] [2024-05-12 13:04:46,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752723338] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:46,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003850456] [2024-05-12 13:04:46,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:46,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:46,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:46,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:46,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:46,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 184 transitions, 1730 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:46,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:46,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:46,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:47,385 INFO L124 PetriNetUnfolderBase]: 5089/8282 cut-off events. [2024-05-12 13:04:47,385 INFO L125 PetriNetUnfolderBase]: For 134520/134540 co-relation queries the response was YES. [2024-05-12 13:04:47,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41825 conditions, 8282 events. 5089/8282 cut-off events. For 134520/134540 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 54872 event pairs, 1176 based on Foata normal form. 31/8144 useless extension candidates. Maximal degree in co-relation 41765. Up to 6121 conditions per place. [2024-05-12 13:04:47,461 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 157 selfloop transitions, 82 changer transitions 0/249 dead transitions. [2024-05-12 13:04:47,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 249 transitions, 2602 flow [2024-05-12 13:04:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 13:04:47,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637755102040817 [2024-05-12 13:04:47,476 INFO L175 Difference]: Start difference. First operand has 133 places, 184 transitions, 1730 flow. Second operand 8 states and 221 transitions. [2024-05-12 13:04:47,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 249 transitions, 2602 flow [2024-05-12 13:04:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 249 transitions, 2510 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 13:04:47,628 INFO L231 Difference]: Finished difference. Result has 138 places, 186 transitions, 1858 flow [2024-05-12 13:04:47,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1858, PETRI_PLACES=138, PETRI_TRANSITIONS=186} [2024-05-12 13:04:47,629 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-05-12 13:04:47,633 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 186 transitions, 1858 flow [2024-05-12 13:04:47,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:47,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:47,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:47,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:04:47,634 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:47,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1944496910, now seen corresponding path program 5 times [2024-05-12 13:04:47,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:47,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253192332] [2024-05-12 13:04:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:47,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:48,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:48,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253192332] [2024-05-12 13:04:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253192332] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:48,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:48,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:04:48,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697079313] [2024-05-12 13:04:48,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:48,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:04:48,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:04:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:04:48,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:48,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 186 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:48,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:48,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:48,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:50,154 INFO L124 PetriNetUnfolderBase]: 5256/8594 cut-off events. [2024-05-12 13:04:50,154 INFO L125 PetriNetUnfolderBase]: For 149526/149534 co-relation queries the response was YES. [2024-05-12 13:04:50,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44024 conditions, 8594 events. 5256/8594 cut-off events. For 149526/149534 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57639 event pairs, 1572 based on Foata normal form. 21/8424 useless extension candidates. Maximal degree in co-relation 43963. Up to 6776 conditions per place. [2024-05-12 13:04:50,231 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 158 selfloop transitions, 82 changer transitions 0/250 dead transitions. [2024-05-12 13:04:50,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 250 transitions, 2612 flow [2024-05-12 13:04:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:04:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:04:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:04:50,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-05-12 13:04:50,232 INFO L175 Difference]: Start difference. First operand has 138 places, 186 transitions, 1858 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:04:50,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 250 transitions, 2612 flow [2024-05-12 13:04:50,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 250 transitions, 2497 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:04:50,409 INFO L231 Difference]: Finished difference. Result has 143 places, 187 transitions, 1942 flow [2024-05-12 13:04:50,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1942, PETRI_PLACES=143, PETRI_TRANSITIONS=187} [2024-05-12 13:04:50,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-05-12 13:04:50,410 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 187 transitions, 1942 flow [2024-05-12 13:04:50,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:50,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:50,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:50,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:04:50,411 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:50,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1151830232, now seen corresponding path program 6 times [2024-05-12 13:04:50,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:50,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730593965] [2024-05-12 13:04:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:50,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730593965] [2024-05-12 13:04:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730593965] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:51,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:51,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:04:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281877889] [2024-05-12 13:04:51,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:51,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:04:51,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:04:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:04:51,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:51,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 187 transitions, 1942 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:51,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:51,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:51,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:52,728 INFO L124 PetriNetUnfolderBase]: 5423/8903 cut-off events. [2024-05-12 13:04:52,728 INFO L125 PetriNetUnfolderBase]: For 160133/160153 co-relation queries the response was YES. [2024-05-12 13:04:52,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 8903 events. 5423/8903 cut-off events. For 160133/160153 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 60393 event pairs, 1590 based on Foata normal form. 35/8741 useless extension candidates. Maximal degree in co-relation 45974. Up to 7033 conditions per place. [2024-05-12 13:04:52,806 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 154 selfloop transitions, 82 changer transitions 0/246 dead transitions. [2024-05-12 13:04:52,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 246 transitions, 2676 flow [2024-05-12 13:04:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:04:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:04:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 13:04:52,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-05-12 13:04:52,807 INFO L175 Difference]: Start difference. First operand has 143 places, 187 transitions, 1942 flow. Second operand 8 states and 216 transitions. [2024-05-12 13:04:52,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 246 transitions, 2676 flow [2024-05-12 13:04:52,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 246 transitions, 2501 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 13:04:53,000 INFO L231 Difference]: Finished difference. Result has 144 places, 188 transitions, 1968 flow [2024-05-12 13:04:53,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1968, PETRI_PLACES=144, PETRI_TRANSITIONS=188} [2024-05-12 13:04:53,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-05-12 13:04:53,001 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 188 transitions, 1968 flow [2024-05-12 13:04:53,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:53,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:53,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:53,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:04:53,002 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:53,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash -167747890, now seen corresponding path program 1 times [2024-05-12 13:04:53,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:53,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894857011] [2024-05-12 13:04:53,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:53,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:53,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:53,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894857011] [2024-05-12 13:04:53,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894857011] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:53,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:53,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500093549] [2024-05-12 13:04:53,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:53,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:53,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:04:53,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 188 transitions, 1968 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) [2024-05-12 13:04:53,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:53,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:04:53,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:55,029 INFO L124 PetriNetUnfolderBase]: 5169/8676 cut-off events. [2024-05-12 13:04:55,029 INFO L125 PetriNetUnfolderBase]: For 155234/155256 co-relation queries the response was YES. [2024-05-12 13:04:55,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44288 conditions, 8676 events. 5169/8676 cut-off events. For 155234/155256 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 60675 event pairs, 1791 based on Foata normal form. 23/8448 useless extension candidates. Maximal degree in co-relation 44224. Up to 7406 conditions per place. [2024-05-12 13:04:55,109 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 170 selfloop transitions, 18 changer transitions 0/221 dead transitions. [2024-05-12 13:04:55,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 221 transitions, 2494 flow [2024-05-12 13:04:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:04:55,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:04:55,111 INFO L175 Difference]: Start difference. First operand has 144 places, 188 transitions, 1968 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:04:55,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 221 transitions, 2494 flow [2024-05-12 13:04:55,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 221 transitions, 2317 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 13:04:55,315 INFO L231 Difference]: Finished difference. Result has 145 places, 191 transitions, 1875 flow [2024-05-12 13:04:55,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1875, PETRI_PLACES=145, PETRI_TRANSITIONS=191} [2024-05-12 13:04:55,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-05-12 13:04:55,316 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 191 transitions, 1875 flow [2024-05-12 13:04:55,317 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) [2024-05-12 13:04:55,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:55,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:55,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:04:55,317 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:55,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash -167748324, now seen corresponding path program 2 times [2024-05-12 13:04:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:55,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291731713] [2024-05-12 13:04:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:55,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:55,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:55,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291731713] [2024-05-12 13:04:55,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291731713] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:55,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:55,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:04:55,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623191390] [2024-05-12 13:04:55,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:55,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:04:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:04:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:04:56,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:56,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 191 transitions, 1875 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:56,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:56,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:56,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:04:57,250 INFO L124 PetriNetUnfolderBase]: 5516/9083 cut-off events. [2024-05-12 13:04:57,250 INFO L125 PetriNetUnfolderBase]: For 162060/162068 co-relation queries the response was YES. [2024-05-12 13:04:57,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46840 conditions, 9083 events. 5516/9083 cut-off events. For 162060/162068 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 62040 event pairs, 1819 based on Foata normal form. 6/8877 useless extension candidates. Maximal degree in co-relation 46775. Up to 7709 conditions per place. [2024-05-12 13:04:57,331 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 171 selfloop transitions, 46 changer transitions 0/227 dead transitions. [2024-05-12 13:04:57,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 2581 flow [2024-05-12 13:04:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:04:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:04:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:04:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:04:57,333 INFO L175 Difference]: Start difference. First operand has 145 places, 191 transitions, 1875 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:04:57,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 2581 flow [2024-05-12 13:04:57,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2519 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 13:04:57,525 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 2052 flow [2024-05-12 13:04:57,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2052, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-05-12 13:04:57,526 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-05-12 13:04:57,526 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 2052 flow [2024-05-12 13:04:57,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:57,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:04:57,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:04:57,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:04:57,527 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:04:57,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:04:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash -905897676, now seen corresponding path program 7 times [2024-05-12 13:04:57,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:04:57,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354890761] [2024-05-12 13:04:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:04:57,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:04:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:04:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:04:58,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:04:58,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354890761] [2024-05-12 13:04:58,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354890761] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:04:58,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:04:58,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:04:58,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191941272] [2024-05-12 13:04:58,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:04:58,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:04:58,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:04:58,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:04:58,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:04:58,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:04:58,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 2052 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:04:58,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:04:58,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:04:58,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:00,048 INFO L124 PetriNetUnfolderBase]: 5683/9328 cut-off events. [2024-05-12 13:05:00,048 INFO L125 PetriNetUnfolderBase]: For 189551/189553 co-relation queries the response was YES. [2024-05-12 13:05:00,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50137 conditions, 9328 events. 5683/9328 cut-off events. For 189551/189553 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 63736 event pairs, 1637 based on Foata normal form. 20/9129 useless extension candidates. Maximal degree in co-relation 50070. Up to 7416 conditions per place. [2024-05-12 13:05:00,132 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 170 selfloop transitions, 90 changer transitions 0/270 dead transitions. [2024-05-12 13:05:00,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 270 transitions, 2880 flow [2024-05-12 13:05:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:05:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:05:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-05-12 13:05:00,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-05-12 13:05:00,134 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 2052 flow. Second operand 10 states and 260 transitions. [2024-05-12 13:05:00,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 270 transitions, 2880 flow [2024-05-12 13:05:00,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 270 transitions, 2784 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 13:05:00,330 INFO L231 Difference]: Finished difference. Result has 155 places, 200 transitions, 2175 flow [2024-05-12 13:05:00,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2175, PETRI_PLACES=155, PETRI_TRANSITIONS=200} [2024-05-12 13:05:00,331 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-05-12 13:05:00,331 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 200 transitions, 2175 flow [2024-05-12 13:05:00,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:00,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:00,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:00,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:05:00,332 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:00,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:00,332 INFO L85 PathProgramCache]: Analyzing trace with hash 354802446, now seen corresponding path program 8 times [2024-05-12 13:05:00,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:00,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063564674] [2024-05-12 13:05:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:00,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:01,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:01,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063564674] [2024-05-12 13:05:01,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063564674] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:01,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:01,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:05:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889131220] [2024-05-12 13:05:01,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:01,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:05:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:05:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:05:01,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:01,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 200 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:01,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:01,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:01,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:02,859 INFO L124 PetriNetUnfolderBase]: 5647/9264 cut-off events. [2024-05-12 13:05:02,860 INFO L125 PetriNetUnfolderBase]: For 189836/189838 co-relation queries the response was YES. [2024-05-12 13:05:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50058 conditions, 9264 events. 5647/9264 cut-off events. For 189836/189838 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 63242 event pairs, 1643 based on Foata normal form. 20/9057 useless extension candidates. Maximal degree in co-relation 49989. Up to 7360 conditions per place. [2024-05-12 13:05:02,949 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 172 selfloop transitions, 84 changer transitions 0/266 dead transitions. [2024-05-12 13:05:02,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 266 transitions, 2964 flow [2024-05-12 13:05:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 13:05:02,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351473922902494 [2024-05-12 13:05:02,950 INFO L175 Difference]: Start difference. First operand has 155 places, 200 transitions, 2175 flow. Second operand 9 states and 236 transitions. [2024-05-12 13:05:02,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 266 transitions, 2964 flow [2024-05-12 13:05:03,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 266 transitions, 2759 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 13:05:03,211 INFO L231 Difference]: Finished difference. Result has 156 places, 200 transitions, 2145 flow [2024-05-12 13:05:03,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2145, PETRI_PLACES=156, PETRI_TRANSITIONS=200} [2024-05-12 13:05:03,212 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-05-12 13:05:03,212 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 200 transitions, 2145 flow [2024-05-12 13:05:03,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:03,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:03,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:03,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:05:03,213 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:03,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash -904283735, now seen corresponding path program 1 times [2024-05-12 13:05:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:03,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843392512] [2024-05-12 13:05:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:03,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:04,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:04,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843392512] [2024-05-12 13:05:04,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843392512] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:04,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:05:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664773747] [2024-05-12 13:05:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:05:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:05:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:05:04,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:04,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 200 transitions, 2145 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:04,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:05,753 INFO L124 PetriNetUnfolderBase]: 5707/9402 cut-off events. [2024-05-12 13:05:05,754 INFO L125 PetriNetUnfolderBase]: For 183106/183108 co-relation queries the response was YES. [2024-05-12 13:05:05,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50122 conditions, 9402 events. 5707/9402 cut-off events. For 183106/183108 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 64719 event pairs, 1663 based on Foata normal form. 4/9163 useless extension candidates. Maximal degree in co-relation 50052. Up to 7620 conditions per place. [2024-05-12 13:05:05,845 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 155 selfloop transitions, 102 changer transitions 0/267 dead transitions. [2024-05-12 13:05:05,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 267 transitions, 3009 flow [2024-05-12 13:05:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:05:05,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:05:05,846 INFO L175 Difference]: Start difference. First operand has 156 places, 200 transitions, 2145 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:05:05,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 267 transitions, 3009 flow [2024-05-12 13:05:06,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 267 transitions, 2795 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 13:05:06,019 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2312 flow [2024-05-12 13:05:06,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2312, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-05-12 13:05:06,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-05-12 13:05:06,020 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2312 flow [2024-05-12 13:05:06,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:06,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:06,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:06,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:05:06,020 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:06,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash 355017927, now seen corresponding path program 2 times [2024-05-12 13:05:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:06,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505130107] [2024-05-12 13:05:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:07,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:07,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505130107] [2024-05-12 13:05:07,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505130107] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:07,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:07,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:05:07,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786377512] [2024-05-12 13:05:07,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:07,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:05:07,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:07,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:05:07,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:05:07,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:07,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2312 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:07,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:07,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:07,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:08,755 INFO L124 PetriNetUnfolderBase]: 5744/9459 cut-off events. [2024-05-12 13:05:08,755 INFO L125 PetriNetUnfolderBase]: For 192159/192161 co-relation queries the response was YES. [2024-05-12 13:05:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51294 conditions, 9459 events. 5744/9459 cut-off events. For 192159/192161 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 65136 event pairs, 1669 based on Foata normal form. 4/9220 useless extension candidates. Maximal degree in co-relation 51222. Up to 7675 conditions per place. [2024-05-12 13:05:08,850 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 169 selfloop transitions, 96 changer transitions 0/275 dead transitions. [2024-05-12 13:05:08,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 275 transitions, 3145 flow [2024-05-12 13:05:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:05:08,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:05:08,854 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2312 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:05:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 275 transitions, 3145 flow [2024-05-12 13:05:09,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 275 transitions, 2943 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 13:05:09,084 INFO L231 Difference]: Finished difference. Result has 164 places, 216 transitions, 2379 flow [2024-05-12 13:05:09,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2379, PETRI_PLACES=164, PETRI_TRANSITIONS=216} [2024-05-12 13:05:09,086 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-05-12 13:05:09,086 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 216 transitions, 2379 flow [2024-05-12 13:05:09,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:09,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:09,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:09,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:05:09,086 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:09,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -903957305, now seen corresponding path program 3 times [2024-05-12 13:05:09,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:09,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490521229] [2024-05-12 13:05:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:09,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:10,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490521229] [2024-05-12 13:05:10,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490521229] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:10,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:10,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:05:10,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781236589] [2024-05-12 13:05:10,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:10,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:05:10,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:10,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:05:10,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:05:10,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:10,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 216 transitions, 2379 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:10,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:10,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:10,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:11,729 INFO L124 PetriNetUnfolderBase]: 5829/9640 cut-off events. [2024-05-12 13:05:11,729 INFO L125 PetriNetUnfolderBase]: For 199181/199183 co-relation queries the response was YES. [2024-05-12 13:05:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51726 conditions, 9640 events. 5829/9640 cut-off events. For 199181/199183 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66740 event pairs, 1454 based on Foata normal form. 4/9397 useless extension candidates. Maximal degree in co-relation 51652. Up to 7453 conditions per place. [2024-05-12 13:05:11,822 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 159 selfloop transitions, 112 changer transitions 0/281 dead transitions. [2024-05-12 13:05:11,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 281 transitions, 3389 flow [2024-05-12 13:05:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:05:11,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-05-12 13:05:11,824 INFO L175 Difference]: Start difference. First operand has 164 places, 216 transitions, 2379 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:05:11,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 281 transitions, 3389 flow [2024-05-12 13:05:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 281 transitions, 3158 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 13:05:12,053 INFO L231 Difference]: Finished difference. Result has 168 places, 221 transitions, 2509 flow [2024-05-12 13:05:12,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2509, PETRI_PLACES=168, PETRI_TRANSITIONS=221} [2024-05-12 13:05:12,054 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-05-12 13:05:12,054 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 221 transitions, 2509 flow [2024-05-12 13:05:12,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:12,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:12,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:12,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:05:12,055 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:12,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash 456714599, now seen corresponding path program 4 times [2024-05-12 13:05:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:12,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025128701] [2024-05-12 13:05:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025128701] [2024-05-12 13:05:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025128701] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:12,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:12,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:05:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766387546] [2024-05-12 13:05:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:12,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:05:12,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:05:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:05:13,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:13,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 221 transitions, 2509 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:13,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:13,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:14,490 INFO L124 PetriNetUnfolderBase]: 5821/9620 cut-off events. [2024-05-12 13:05:14,490 INFO L125 PetriNetUnfolderBase]: For 206908/206910 co-relation queries the response was YES. [2024-05-12 13:05:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52275 conditions, 9620 events. 5821/9620 cut-off events. For 206908/206910 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 66728 event pairs, 1702 based on Foata normal form. 4/9375 useless extension candidates. Maximal degree in co-relation 52199. Up to 7798 conditions per place. [2024-05-12 13:05:14,590 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 164 selfloop transitions, 102 changer transitions 0/276 dead transitions. [2024-05-12 13:05:14,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 276 transitions, 3260 flow [2024-05-12 13:05:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:05:14,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-05-12 13:05:14,591 INFO L175 Difference]: Start difference. First operand has 168 places, 221 transitions, 2509 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:05:14,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 276 transitions, 3260 flow [2024-05-12 13:05:14,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 2992 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-05-12 13:05:14,901 INFO L231 Difference]: Finished difference. Result has 172 places, 222 transitions, 2473 flow [2024-05-12 13:05:14,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2473, PETRI_PLACES=172, PETRI_TRANSITIONS=222} [2024-05-12 13:05:14,902 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-05-12 13:05:14,902 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 222 transitions, 2473 flow [2024-05-12 13:05:14,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:14,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:14,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:14,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:05:14,902 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:14,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash 216959196, now seen corresponding path program 3 times [2024-05-12 13:05:14,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:14,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919692506] [2024-05-12 13:05:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:14,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:15,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:15,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919692506] [2024-05-12 13:05:15,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919692506] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:15,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:15,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:15,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755338920] [2024-05-12 13:05:15,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:15,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:15,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:15,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 222 transitions, 2473 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:15,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:15,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:15,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:17,030 INFO L124 PetriNetUnfolderBase]: 5852/9794 cut-off events. [2024-05-12 13:05:17,030 INFO L125 PetriNetUnfolderBase]: For 209317/209325 co-relation queries the response was YES. [2024-05-12 13:05:17,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52269 conditions, 9794 events. 5852/9794 cut-off events. For 209317/209325 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 68980 event pairs, 1779 based on Foata normal form. 6/9532 useless extension candidates. Maximal degree in co-relation 52191. Up to 8119 conditions per place. [2024-05-12 13:05:17,139 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 187 selfloop transitions, 59 changer transitions 0/256 dead transitions. [2024-05-12 13:05:17,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 256 transitions, 3349 flow [2024-05-12 13:05:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:05:17,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:05:17,144 INFO L175 Difference]: Start difference. First operand has 172 places, 222 transitions, 2473 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:05:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 256 transitions, 3349 flow [2024-05-12 13:05:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 256 transitions, 3126 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-05-12 13:05:17,374 INFO L231 Difference]: Finished difference. Result has 174 places, 230 transitions, 2526 flow [2024-05-12 13:05:17,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2526, PETRI_PLACES=174, PETRI_TRANSITIONS=230} [2024-05-12 13:05:17,374 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-05-12 13:05:17,374 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 230 transitions, 2526 flow [2024-05-12 13:05:17,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:17,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:17,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:05:17,375 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash 216959630, now seen corresponding path program 2 times [2024-05-12 13:05:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501030014] [2024-05-12 13:05:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501030014] [2024-05-12 13:05:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501030014] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:18,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123538805] [2024-05-12 13:05:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:18,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:18,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 230 transitions, 2526 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) [2024-05-12 13:05:18,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:18,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:18,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:19,624 INFO L124 PetriNetUnfolderBase]: 5596/9547 cut-off events. [2024-05-12 13:05:19,625 INFO L125 PetriNetUnfolderBase]: For 218060/218106 co-relation queries the response was YES. [2024-05-12 13:05:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51217 conditions, 9547 events. 5596/9547 cut-off events. For 218060/218106 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 68830 event pairs, 1683 based on Foata normal form. 33/9270 useless extension candidates. Maximal degree in co-relation 51137. Up to 7989 conditions per place. [2024-05-12 13:05:19,725 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 200 selfloop transitions, 23 changer transitions 0/260 dead transitions. [2024-05-12 13:05:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 260 transitions, 3138 flow [2024-05-12 13:05:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:05:19,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49271137026239065 [2024-05-12 13:05:19,727 INFO L175 Difference]: Start difference. First operand has 174 places, 230 transitions, 2526 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:05:19,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 260 transitions, 3138 flow [2024-05-12 13:05:19,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 2964 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-05-12 13:05:19,958 INFO L231 Difference]: Finished difference. Result has 177 places, 233 transitions, 2464 flow [2024-05-12 13:05:19,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2464, PETRI_PLACES=177, PETRI_TRANSITIONS=233} [2024-05-12 13:05:19,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 122 predicate places. [2024-05-12 13:05:19,958 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 233 transitions, 2464 flow [2024-05-12 13:05:19,959 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) [2024-05-12 13:05:19,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:19,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:19,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:05:19,959 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:19,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1505071368, now seen corresponding path program 3 times [2024-05-12 13:05:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:19,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206879610] [2024-05-12 13:05:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:20,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:20,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206879610] [2024-05-12 13:05:20,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206879610] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903097106] [2024-05-12 13:05:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:20,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:20,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 233 transitions, 2464 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) [2024-05-12 13:05:20,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:20,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:20,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:22,279 INFO L124 PetriNetUnfolderBase]: 5598/9557 cut-off events. [2024-05-12 13:05:22,280 INFO L125 PetriNetUnfolderBase]: For 223895/223941 co-relation queries the response was YES. [2024-05-12 13:05:22,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50953 conditions, 9557 events. 5598/9557 cut-off events. For 223895/223941 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68960 event pairs, 1683 based on Foata normal form. 33/9279 useless extension candidates. Maximal degree in co-relation 50872. Up to 7959 conditions per place. [2024-05-12 13:05:22,531 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 198 selfloop transitions, 31 changer transitions 0/266 dead transitions. [2024-05-12 13:05:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 266 transitions, 3108 flow [2024-05-12 13:05:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:05:22,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:05:22,533 INFO L175 Difference]: Start difference. First operand has 177 places, 233 transitions, 2464 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:05:22,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 266 transitions, 3108 flow [2024-05-12 13:05:22,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 266 transitions, 3018 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 13:05:22,775 INFO L231 Difference]: Finished difference. Result has 180 places, 239 transitions, 2538 flow [2024-05-12 13:05:22,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=180, PETRI_TRANSITIONS=239} [2024-05-12 13:05:22,776 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-05-12 13:05:22,776 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 239 transitions, 2538 flow [2024-05-12 13:05:22,776 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) [2024-05-12 13:05:22,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:22,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:05:22,776 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:22,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash -244157804, now seen corresponding path program 1 times [2024-05-12 13:05:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332780650] [2024-05-12 13:05:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:23,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:23,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332780650] [2024-05-12 13:05:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332780650] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:23,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510906568] [2024-05-12 13:05:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:23,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:23,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 239 transitions, 2538 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) [2024-05-12 13:05:23,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:23,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:23,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:24,904 INFO L124 PetriNetUnfolderBase]: 5596/9437 cut-off events. [2024-05-12 13:05:24,905 INFO L125 PetriNetUnfolderBase]: For 241953/241979 co-relation queries the response was YES. [2024-05-12 13:05:24,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52648 conditions, 9437 events. 5596/9437 cut-off events. For 241953/241979 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 66840 event pairs, 1618 based on Foata normal form. 2/9202 useless extension candidates. Maximal degree in co-relation 52565. Up to 8062 conditions per place. [2024-05-12 13:05:24,982 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 241 selfloop transitions, 17 changer transitions 0/273 dead transitions. [2024-05-12 13:05:24,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 273 transitions, 3223 flow [2024-05-12 13:05:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:05:24,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014577259475219 [2024-05-12 13:05:24,983 INFO L175 Difference]: Start difference. First operand has 180 places, 239 transitions, 2538 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:05:24,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 273 transitions, 3223 flow [2024-05-12 13:05:25,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 273 transitions, 3146 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-05-12 13:05:25,252 INFO L231 Difference]: Finished difference. Result has 185 places, 246 transitions, 2599 flow [2024-05-12 13:05:25,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=185, PETRI_TRANSITIONS=246} [2024-05-12 13:05:25,253 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-05-12 13:05:25,253 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 246 transitions, 2599 flow [2024-05-12 13:05:25,253 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) [2024-05-12 13:05:25,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:25,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:25,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:05:25,254 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:25,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash 9567894, now seen corresponding path program 2 times [2024-05-12 13:05:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:25,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642459569] [2024-05-12 13:05:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:25,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642459569] [2024-05-12 13:05:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642459569] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:25,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:25,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653262192] [2024-05-12 13:05:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:25,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:26,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:26,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 246 transitions, 2599 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) [2024-05-12 13:05:26,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:26,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:26,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:27,495 INFO L124 PetriNetUnfolderBase]: 5630/9489 cut-off events. [2024-05-12 13:05:27,495 INFO L125 PetriNetUnfolderBase]: For 253937/253963 co-relation queries the response was YES. [2024-05-12 13:05:27,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54184 conditions, 9489 events. 5630/9489 cut-off events. For 253937/253963 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 67192 event pairs, 1614 based on Foata normal form. 2/9254 useless extension candidates. Maximal degree in co-relation 54098. Up to 8077 conditions per place. [2024-05-12 13:05:27,578 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 239 selfloop transitions, 22 changer transitions 0/276 dead transitions. [2024-05-12 13:05:27,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 276 transitions, 3269 flow [2024-05-12 13:05:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:05:27,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:05:27,580 INFO L175 Difference]: Start difference. First operand has 185 places, 246 transitions, 2599 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:05:27,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 276 transitions, 3269 flow [2024-05-12 13:05:27,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 276 transitions, 3200 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 13:05:27,908 INFO L231 Difference]: Finished difference. Result has 188 places, 249 transitions, 2632 flow [2024-05-12 13:05:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=188, PETRI_TRANSITIONS=249} [2024-05-12 13:05:27,909 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 133 predicate places. [2024-05-12 13:05:27,909 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 249 transitions, 2632 flow [2024-05-12 13:05:27,909 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) [2024-05-12 13:05:27,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:27,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:05:27,910 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:27,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 9568142, now seen corresponding path program 1 times [2024-05-12 13:05:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969814257] [2024-05-12 13:05:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:27,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:28,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969814257] [2024-05-12 13:05:28,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969814257] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:28,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:28,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71864326] [2024-05-12 13:05:28,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:28,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:28,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:28,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:28,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 249 transitions, 2632 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) [2024-05-12 13:05:28,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:28,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:28,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:30,267 INFO L124 PetriNetUnfolderBase]: 5641/9525 cut-off events. [2024-05-12 13:05:30,267 INFO L125 PetriNetUnfolderBase]: For 266143/266169 co-relation queries the response was YES. [2024-05-12 13:05:30,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55155 conditions, 9525 events. 5641/9525 cut-off events. For 266143/266169 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 67487 event pairs, 1629 based on Foata normal form. 3/9289 useless extension candidates. Maximal degree in co-relation 55068. Up to 8123 conditions per place. [2024-05-12 13:05:30,360 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 247 selfloop transitions, 16 changer transitions 0/278 dead transitions. [2024-05-12 13:05:30,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 278 transitions, 3296 flow [2024-05-12 13:05:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:05:30,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:05:30,362 INFO L175 Difference]: Start difference. First operand has 188 places, 249 transitions, 2632 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:05:30,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 278 transitions, 3296 flow [2024-05-12 13:05:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 278 transitions, 3216 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:05:30,725 INFO L231 Difference]: Finished difference. Result has 190 places, 252 transitions, 2636 flow [2024-05-12 13:05:30,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2636, PETRI_PLACES=190, PETRI_TRANSITIONS=252} [2024-05-12 13:05:30,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-05-12 13:05:30,725 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 252 transitions, 2636 flow [2024-05-12 13:05:30,726 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) [2024-05-12 13:05:30,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:30,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:05:30,726 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:30,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 217144142, now seen corresponding path program 2 times [2024-05-12 13:05:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395083466] [2024-05-12 13:05:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:31,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395083466] [2024-05-12 13:05:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395083466] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:31,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131288048] [2024-05-12 13:05:31,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:31,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:31,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:31,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:31,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 252 transitions, 2636 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) [2024-05-12 13:05:31,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:31,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:31,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:33,261 INFO L124 PetriNetUnfolderBase]: 5685/9655 cut-off events. [2024-05-12 13:05:33,262 INFO L125 PetriNetUnfolderBase]: For 275763/275798 co-relation queries the response was YES. [2024-05-12 13:05:33,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56187 conditions, 9655 events. 5685/9655 cut-off events. For 275763/275798 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 68963 event pairs, 1606 based on Foata normal form. 9/9401 useless extension candidates. Maximal degree in co-relation 56099. Up to 8161 conditions per place. [2024-05-12 13:05:33,372 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 244 selfloop transitions, 21 changer transitions 0/280 dead transitions. [2024-05-12 13:05:33,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 280 transitions, 3316 flow [2024-05-12 13:05:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:05:33,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:05:33,374 INFO L175 Difference]: Start difference. First operand has 190 places, 252 transitions, 2636 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:05:33,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 280 transitions, 3316 flow [2024-05-12 13:05:33,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 280 transitions, 3256 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:05:33,716 INFO L231 Difference]: Finished difference. Result has 192 places, 255 transitions, 2676 flow [2024-05-12 13:05:33,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=192, PETRI_TRANSITIONS=255} [2024-05-12 13:05:33,717 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-05-12 13:05:33,717 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 255 transitions, 2676 flow [2024-05-12 13:05:33,717 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) [2024-05-12 13:05:33,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:33,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:33,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:05:33,718 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:33,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash 217143894, now seen corresponding path program 3 times [2024-05-12 13:05:33,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:33,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550306314] [2024-05-12 13:05:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:33,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:34,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:34,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550306314] [2024-05-12 13:05:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550306314] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:34,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:34,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:05:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122159789] [2024-05-12 13:05:34,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:34,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:05:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:05:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:05:34,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:34,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 255 transitions, 2676 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) [2024-05-12 13:05:34,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:34,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:34,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:35,953 INFO L124 PetriNetUnfolderBase]: 5704/9734 cut-off events. [2024-05-12 13:05:35,953 INFO L125 PetriNetUnfolderBase]: For 285418/285453 co-relation queries the response was YES. [2024-05-12 13:05:36,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57069 conditions, 9734 events. 5704/9734 cut-off events. For 285418/285453 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 70068 event pairs, 2490 based on Foata normal form. 4/9475 useless extension candidates. Maximal degree in co-relation 56980. Up to 8132 conditions per place. [2024-05-12 13:05:36,045 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 239 selfloop transitions, 31 changer transitions 0/285 dead transitions. [2024-05-12 13:05:36,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 285 transitions, 3397 flow [2024-05-12 13:05:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:05:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:05:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-05-12 13:05:36,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-05-12 13:05:36,047 INFO L175 Difference]: Start difference. First operand has 192 places, 255 transitions, 2676 flow. Second operand 8 states and 188 transitions. [2024-05-12 13:05:36,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 285 transitions, 3397 flow [2024-05-12 13:05:36,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 285 transitions, 3319 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 13:05:36,456 INFO L231 Difference]: Finished difference. Result has 196 places, 260 transitions, 2754 flow [2024-05-12 13:05:36,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2754, PETRI_PLACES=196, PETRI_TRANSITIONS=260} [2024-05-12 13:05:36,456 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 141 predicate places. [2024-05-12 13:05:36,457 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 260 transitions, 2754 flow [2024-05-12 13:05:36,457 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) [2024-05-12 13:05:36,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:36,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:05:36,457 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:36,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash 217440812, now seen corresponding path program 3 times [2024-05-12 13:05:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:36,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354551518] [2024-05-12 13:05:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:37,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:37,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354551518] [2024-05-12 13:05:37,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354551518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:37,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:37,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256721727] [2024-05-12 13:05:37,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:37,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:37,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:37,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 260 transitions, 2754 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) [2024-05-12 13:05:37,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:37,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:37,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:39,092 INFO L124 PetriNetUnfolderBase]: 5756/10051 cut-off events. [2024-05-12 13:05:39,093 INFO L125 PetriNetUnfolderBase]: For 298115/298158 co-relation queries the response was YES. [2024-05-12 13:05:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58277 conditions, 10051 events. 5756/10051 cut-off events. For 298115/298158 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 73896 event pairs, 2518 based on Foata normal form. 9/9734 useless extension candidates. Maximal degree in co-relation 58186. Up to 8188 conditions per place. [2024-05-12 13:05:39,193 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 243 selfloop transitions, 34 changer transitions 0/292 dead transitions. [2024-05-12 13:05:39,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 292 transitions, 3626 flow [2024-05-12 13:05:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:05:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:05:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:05:39,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:05:39,194 INFO L175 Difference]: Start difference. First operand has 196 places, 260 transitions, 2754 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:05:39,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 292 transitions, 3626 flow [2024-05-12 13:05:39,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 292 transitions, 3530 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 13:05:39,614 INFO L231 Difference]: Finished difference. Result has 200 places, 266 transitions, 2876 flow [2024-05-12 13:05:39,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2876, PETRI_PLACES=200, PETRI_TRANSITIONS=266} [2024-05-12 13:05:39,615 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 145 predicate places. [2024-05-12 13:05:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 266 transitions, 2876 flow [2024-05-12 13:05:39,615 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) [2024-05-12 13:05:39,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:39,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:05:39,616 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:39,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 217451724, now seen corresponding path program 1 times [2024-05-12 13:05:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822140695] [2024-05-12 13:05:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:40,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822140695] [2024-05-12 13:05:40,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822140695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:40,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:40,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:05:40,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309663300] [2024-05-12 13:05:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:40,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:05:40,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:05:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:05:40,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:05:40,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 266 transitions, 2876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:40,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:40,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:05:40,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:42,520 INFO L124 PetriNetUnfolderBase]: 5801/10160 cut-off events. [2024-05-12 13:05:42,520 INFO L125 PetriNetUnfolderBase]: For 307820/307888 co-relation queries the response was YES. [2024-05-12 13:05:42,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58532 conditions, 10160 events. 5801/10160 cut-off events. For 307820/307888 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 75584 event pairs, 2623 based on Foata normal form. 67/9855 useless extension candidates. Maximal degree in co-relation 58438. Up to 8285 conditions per place. [2024-05-12 13:05:42,616 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 234 selfloop transitions, 20 changer transitions 0/294 dead transitions. [2024-05-12 13:05:42,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 294 transitions, 3504 flow [2024-05-12 13:05:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-05-12 13:05:42,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-05-12 13:05:42,618 INFO L175 Difference]: Start difference. First operand has 200 places, 266 transitions, 2876 flow. Second operand 9 states and 204 transitions. [2024-05-12 13:05:42,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 294 transitions, 3504 flow [2024-05-12 13:05:43,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 294 transitions, 3395 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-05-12 13:05:43,067 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 2813 flow [2024-05-12 13:05:43,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2813, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-05-12 13:05:43,067 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 151 predicate places. [2024-05-12 13:05:43,067 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 2813 flow [2024-05-12 13:05:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:43,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:43,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:43,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:05:43,068 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:43,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 153627620, now seen corresponding path program 1 times [2024-05-12 13:05:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:43,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789024128] [2024-05-12 13:05:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:43,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:43,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:43,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789024128] [2024-05-12 13:05:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789024128] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:43,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:43,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:05:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493058302] [2024-05-12 13:05:43,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:43,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:05:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:05:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:05:44,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:44,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 2813 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:44,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:44,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:44,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:45,676 INFO L124 PetriNetUnfolderBase]: 6169/10201 cut-off events. [2024-05-12 13:05:45,676 INFO L125 PetriNetUnfolderBase]: For 315958/315981 co-relation queries the response was YES. [2024-05-12 13:05:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61301 conditions, 10201 events. 6169/10201 cut-off events. For 315958/315981 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71114 event pairs, 1975 based on Foata normal form. 22/9984 useless extension candidates. Maximal degree in co-relation 61205. Up to 8716 conditions per place. [2024-05-12 13:05:45,768 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 255 selfloop transitions, 58 changer transitions 0/323 dead transitions. [2024-05-12 13:05:45,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 323 transitions, 3761 flow [2024-05-12 13:05:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:05:45,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:05:45,769 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 2813 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:05:45,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 323 transitions, 3761 flow [2024-05-12 13:05:46,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 323 transitions, 3651 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-05-12 13:05:46,159 INFO L231 Difference]: Finished difference. Result has 207 places, 284 transitions, 3063 flow [2024-05-12 13:05:46,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3063, PETRI_PLACES=207, PETRI_TRANSITIONS=284} [2024-05-12 13:05:46,160 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2024-05-12 13:05:46,160 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 284 transitions, 3063 flow [2024-05-12 13:05:46,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:46,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:46,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:05:46,161 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:46,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1356768530, now seen corresponding path program 2 times [2024-05-12 13:05:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:46,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11137892] [2024-05-12 13:05:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:46,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11137892] [2024-05-12 13:05:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11137892] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:47,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:47,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:05:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113817115] [2024-05-12 13:05:47,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:47,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:05:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:05:47,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:05:47,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:47,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 284 transitions, 3063 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:47,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:47,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:47,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:48,748 INFO L124 PetriNetUnfolderBase]: 6333/10423 cut-off events. [2024-05-12 13:05:48,749 INFO L125 PetriNetUnfolderBase]: For 333706/333721 co-relation queries the response was YES. [2024-05-12 13:05:48,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64940 conditions, 10423 events. 6333/10423 cut-off events. For 333706/333721 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 72227 event pairs, 1997 based on Foata normal form. 14/10189 useless extension candidates. Maximal degree in co-relation 64843. Up to 8885 conditions per place. [2024-05-12 13:05:49,048 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 265 selfloop transitions, 73 changer transitions 0/348 dead transitions. [2024-05-12 13:05:49,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 348 transitions, 4263 flow [2024-05-12 13:05:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:05:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:05:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 13:05:49,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-05-12 13:05:49,049 INFO L175 Difference]: Start difference. First operand has 207 places, 284 transitions, 3063 flow. Second operand 9 states and 222 transitions. [2024-05-12 13:05:49,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 348 transitions, 4263 flow [2024-05-12 13:05:49,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 348 transitions, 4011 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-05-12 13:05:49,473 INFO L231 Difference]: Finished difference. Result has 214 places, 311 transitions, 3442 flow [2024-05-12 13:05:49,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3442, PETRI_PLACES=214, PETRI_TRANSITIONS=311} [2024-05-12 13:05:49,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 159 predicate places. [2024-05-12 13:05:49,474 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 311 transitions, 3442 flow [2024-05-12 13:05:49,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:49,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:49,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:49,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:05:49,475 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:49,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1083447803, now seen corresponding path program 1 times [2024-05-12 13:05:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:49,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346433916] [2024-05-12 13:05:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:49,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:50,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346433916] [2024-05-12 13:05:50,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346433916] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:50,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:50,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:50,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916600866] [2024-05-12 13:05:50,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:50,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:50,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:50,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:50,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:50,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:50,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 311 transitions, 3442 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:50,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:50,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:50,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:51,972 INFO L124 PetriNetUnfolderBase]: 6367/10474 cut-off events. [2024-05-12 13:05:51,973 INFO L125 PetriNetUnfolderBase]: For 347259/347268 co-relation queries the response was YES. [2024-05-12 13:05:52,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66441 conditions, 10474 events. 6367/10474 cut-off events. For 347259/347268 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 72532 event pairs, 2001 based on Foata normal form. 8/10231 useless extension candidates. Maximal degree in co-relation 66340. Up to 8993 conditions per place. [2024-05-12 13:05:52,105 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 277 selfloop transitions, 61 changer transitions 0/348 dead transitions. [2024-05-12 13:05:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 4301 flow [2024-05-12 13:05:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:05:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:05:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:05:52,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076530612244898 [2024-05-12 13:05:52,107 INFO L175 Difference]: Start difference. First operand has 214 places, 311 transitions, 3442 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:05:52,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 4301 flow [2024-05-12 13:05:52,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 348 transitions, 4172 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-05-12 13:05:52,601 INFO L231 Difference]: Finished difference. Result has 219 places, 316 transitions, 3515 flow [2024-05-12 13:05:52,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3515, PETRI_PLACES=219, PETRI_TRANSITIONS=316} [2024-05-12 13:05:52,601 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 164 predicate places. [2024-05-12 13:05:52,601 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 316 transitions, 3515 flow [2024-05-12 13:05:52,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:52,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:52,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:52,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:05:52,602 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:52,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:52,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1798929497, now seen corresponding path program 1 times [2024-05-12 13:05:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:52,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570963474] [2024-05-12 13:05:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:52,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570963474] [2024-05-12 13:05:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570963474] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:05:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857502476] [2024-05-12 13:05:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:05:53,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:05:53,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:05:53,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:53,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 316 transitions, 3515 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:53,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:53,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:53,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:56,091 INFO L124 PetriNetUnfolderBase]: 7226/12015 cut-off events. [2024-05-12 13:05:56,091 INFO L125 PetriNetUnfolderBase]: For 375268/375277 co-relation queries the response was YES. [2024-05-12 13:05:56,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73899 conditions, 12015 events. 7226/12015 cut-off events. For 375268/375277 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 85999 event pairs, 1968 based on Foata normal form. 14/11735 useless extension candidates. Maximal degree in co-relation 73797. Up to 8969 conditions per place. [2024-05-12 13:05:56,235 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 319 selfloop transitions, 136 changer transitions 0/465 dead transitions. [2024-05-12 13:05:56,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 465 transitions, 5412 flow [2024-05-12 13:05:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 13:05:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 13:05:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 338 transitions. [2024-05-12 13:05:56,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-05-12 13:05:56,237 INFO L175 Difference]: Start difference. First operand has 219 places, 316 transitions, 3515 flow. Second operand 13 states and 338 transitions. [2024-05-12 13:05:56,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 465 transitions, 5412 flow [2024-05-12 13:05:56,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 465 transitions, 5299 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 13:05:56,879 INFO L231 Difference]: Finished difference. Result has 233 places, 361 transitions, 4228 flow [2024-05-12 13:05:56,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4228, PETRI_PLACES=233, PETRI_TRANSITIONS=361} [2024-05-12 13:05:56,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-05-12 13:05:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 361 transitions, 4228 flow [2024-05-12 13:05:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:56,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:56,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:05:56,880 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:56,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1339190183, now seen corresponding path program 2 times [2024-05-12 13:05:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039376699] [2024-05-12 13:05:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039376699] [2024-05-12 13:05:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039376699] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:57,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:57,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:05:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145988588] [2024-05-12 13:05:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:05:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:05:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:05:57,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:05:57,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 361 transitions, 4228 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:57,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:57,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:05:57,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:59,502 INFO L124 PetriNetUnfolderBase]: 7353/12238 cut-off events. [2024-05-12 13:05:59,503 INFO L125 PetriNetUnfolderBase]: For 389568/389577 co-relation queries the response was YES. [2024-05-12 13:05:59,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77994 conditions, 12238 events. 7353/12238 cut-off events. For 389568/389577 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 87908 event pairs, 2176 based on Foata normal form. 8/11942 useless extension candidates. Maximal degree in co-relation 77886. Up to 10255 conditions per place. [2024-05-12 13:05:59,656 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 318 selfloop transitions, 80 changer transitions 0/408 dead transitions. [2024-05-12 13:05:59,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 408 transitions, 5436 flow [2024-05-12 13:05:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:05:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:05:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:05:59,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076530612244898 [2024-05-12 13:05:59,657 INFO L175 Difference]: Start difference. First operand has 233 places, 361 transitions, 4228 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:05:59,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 408 transitions, 5436 flow [2024-05-12 13:06:00,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 408 transitions, 5271 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:00,328 INFO L231 Difference]: Finished difference. Result has 238 places, 374 transitions, 4427 flow [2024-05-12 13:06:00,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4427, PETRI_PLACES=238, PETRI_TRANSITIONS=374} [2024-05-12 13:06:00,329 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-05-12 13:06:00,329 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 374 transitions, 4427 flow [2024-05-12 13:06:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:00,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:00,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:00,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:06:00,330 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:00,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1339180728, now seen corresponding path program 3 times [2024-05-12 13:06:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178493397] [2024-05-12 13:06:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:01,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178493397] [2024-05-12 13:06:01,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178493397] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:01,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:01,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:01,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957683365] [2024-05-12 13:06:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:01,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:01,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:01,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:01,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 374 transitions, 4427 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:01,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:01,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:01,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:03,482 INFO L124 PetriNetUnfolderBase]: 7466/12406 cut-off events. [2024-05-12 13:06:03,483 INFO L125 PetriNetUnfolderBase]: For 404391/404400 co-relation queries the response was YES. [2024-05-12 13:06:03,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79097 conditions, 12406 events. 7466/12406 cut-off events. For 404391/404400 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 89195 event pairs, 2171 based on Foata normal form. 8/12106 useless extension candidates. Maximal degree in co-relation 78987. Up to 10202 conditions per place. [2024-05-12 13:06:03,653 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 323 selfloop transitions, 93 changer transitions 0/426 dead transitions. [2024-05-12 13:06:03,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 426 transitions, 5891 flow [2024-05-12 13:06:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 13:06:03,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056689342403629 [2024-05-12 13:06:03,654 INFO L175 Difference]: Start difference. First operand has 238 places, 374 transitions, 4427 flow. Second operand 9 states and 223 transitions. [2024-05-12 13:06:03,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 426 transitions, 5891 flow [2024-05-12 13:06:04,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 426 transitions, 5787 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:04,386 INFO L231 Difference]: Finished difference. Result has 244 places, 384 transitions, 4733 flow [2024-05-12 13:06:04,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4733, PETRI_PLACES=244, PETRI_TRANSITIONS=384} [2024-05-12 13:06:04,387 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 189 predicate places. [2024-05-12 13:06:04,387 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 384 transitions, 4733 flow [2024-05-12 13:06:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:04,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:04,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:06:04,387 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:04,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1875165521, now seen corresponding path program 1 times [2024-05-12 13:06:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:04,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152516740] [2024-05-12 13:06:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:05,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152516740] [2024-05-12 13:06:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152516740] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:05,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:05,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:05,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580257463] [2024-05-12 13:06:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:05,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:06:05,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 384 transitions, 4733 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:05,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:05,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:06:05,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:07,619 INFO L124 PetriNetUnfolderBase]: 7178/12110 cut-off events. [2024-05-12 13:06:07,620 INFO L125 PetriNetUnfolderBase]: For 422211/422265 co-relation queries the response was YES. [2024-05-12 13:06:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78576 conditions, 12110 events. 7178/12110 cut-off events. For 422211/422265 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 88957 event pairs, 2575 based on Foata normal form. 55/11820 useless extension candidates. Maximal degree in co-relation 78463. Up to 10102 conditions per place. [2024-05-12 13:06:07,768 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 346 selfloop transitions, 27 changer transitions 0/427 dead transitions. [2024-05-12 13:06:07,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 427 transitions, 5761 flow [2024-05-12 13:06:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-05-12 13:06:07,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-05-12 13:06:07,770 INFO L175 Difference]: Start difference. First operand has 244 places, 384 transitions, 4733 flow. Second operand 9 states and 219 transitions. [2024-05-12 13:06:07,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 427 transitions, 5761 flow [2024-05-12 13:06:08,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 427 transitions, 5568 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:08,573 INFO L231 Difference]: Finished difference. Result has 251 places, 391 transitions, 4751 flow [2024-05-12 13:06:08,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4544, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4751, PETRI_PLACES=251, PETRI_TRANSITIONS=391} [2024-05-12 13:06:08,574 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 196 predicate places. [2024-05-12 13:06:08,574 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 391 transitions, 4751 flow [2024-05-12 13:06:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:08,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:08,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:08,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:06:08,575 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:08,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1339193748, now seen corresponding path program 4 times [2024-05-12 13:06:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496709515] [2024-05-12 13:06:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:09,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:09,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496709515] [2024-05-12 13:06:09,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496709515] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:09,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:09,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231485876] [2024-05-12 13:06:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:09,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:09,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:09,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:09,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 391 transitions, 4751 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:09,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:09,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:09,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:11,848 INFO L124 PetriNetUnfolderBase]: 7499/12433 cut-off events. [2024-05-12 13:06:11,848 INFO L125 PetriNetUnfolderBase]: For 431814/431823 co-relation queries the response was YES. [2024-05-12 13:06:11,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82112 conditions, 12433 events. 7499/12433 cut-off events. For 431814/431823 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 88985 event pairs, 2194 based on Foata normal form. 8/12139 useless extension candidates. Maximal degree in co-relation 81994. Up to 10430 conditions per place. [2024-05-12 13:06:12,002 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 338 selfloop transitions, 85 changer transitions 0/433 dead transitions. [2024-05-12 13:06:12,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 433 transitions, 5984 flow [2024-05-12 13:06:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 13:06:12,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011337868480725 [2024-05-12 13:06:12,003 INFO L175 Difference]: Start difference. First operand has 251 places, 391 transitions, 4751 flow. Second operand 9 states and 221 transitions. [2024-05-12 13:06:12,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 433 transitions, 5984 flow [2024-05-12 13:06:12,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 433 transitions, 5872 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:12,938 INFO L231 Difference]: Finished difference. Result has 257 places, 396 transitions, 4968 flow [2024-05-12 13:06:12,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4968, PETRI_PLACES=257, PETRI_TRANSITIONS=396} [2024-05-12 13:06:12,939 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 202 predicate places. [2024-05-12 13:06:12,939 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 396 transitions, 4968 flow [2024-05-12 13:06:12,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:12,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:12,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:12,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:06:12,940 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:12,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -915434734, now seen corresponding path program 5 times [2024-05-12 13:06:12,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:12,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987736348] [2024-05-12 13:06:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:12,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:13,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:13,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987736348] [2024-05-12 13:06:13,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987736348] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:13,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:13,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:13,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357298878] [2024-05-12 13:06:13,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:13,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:13,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:13,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:13,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:13,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 396 transitions, 4968 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:13,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:13,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:13,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:16,288 INFO L124 PetriNetUnfolderBase]: 7533/12517 cut-off events. [2024-05-12 13:06:16,288 INFO L125 PetriNetUnfolderBase]: For 448205/448220 co-relation queries the response was YES. [2024-05-12 13:06:16,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83534 conditions, 12517 events. 7533/12517 cut-off events. For 448205/448220 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 90319 event pairs, 2225 based on Foata normal form. 14/12225 useless extension candidates. Maximal degree in co-relation 83414. Up to 10519 conditions per place. [2024-05-12 13:06:16,455 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 335 selfloop transitions, 89 changer transitions 0/434 dead transitions. [2024-05-12 13:06:16,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 434 transitions, 6068 flow [2024-05-12 13:06:16,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:16,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:06:16,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-05-12 13:06:16,457 INFO L175 Difference]: Start difference. First operand has 257 places, 396 transitions, 4968 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:06:16,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 434 transitions, 6068 flow [2024-05-12 13:06:17,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 434 transitions, 5870 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:17,364 INFO L231 Difference]: Finished difference. Result has 260 places, 400 transitions, 5078 flow [2024-05-12 13:06:17,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=260, PETRI_TRANSITIONS=400} [2024-05-12 13:06:17,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 205 predicate places. [2024-05-12 13:06:17,365 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 400 transitions, 5078 flow [2024-05-12 13:06:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:17,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:17,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:17,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:06:17,366 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:17,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:17,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1697082247, now seen corresponding path program 3 times [2024-05-12 13:06:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:17,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222547341] [2024-05-12 13:06:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:17,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:18,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:18,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222547341] [2024-05-12 13:06:18,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222547341] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:18,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:18,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208671750] [2024-05-12 13:06:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:18,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:18,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:18,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:18,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 400 transitions, 5078 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:18,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:18,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:20,385 INFO L124 PetriNetUnfolderBase]: 7581/12586 cut-off events. [2024-05-12 13:06:20,385 INFO L125 PetriNetUnfolderBase]: For 467603/467612 co-relation queries the response was YES. [2024-05-12 13:06:20,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85328 conditions, 12586 events. 7581/12586 cut-off events. For 467603/467612 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 90644 event pairs, 1992 based on Foata normal form. 10/12286 useless extension candidates. Maximal degree in co-relation 85207. Up to 10690 conditions per place. [2024-05-12 13:06:20,553 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 359 selfloop transitions, 69 changer transitions 0/438 dead transitions. [2024-05-12 13:06:20,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 438 transitions, 6257 flow [2024-05-12 13:06:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:06:20,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:06:20,555 INFO L175 Difference]: Start difference. First operand has 260 places, 400 transitions, 5078 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:06:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 438 transitions, 6257 flow [2024-05-12 13:06:21,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 438 transitions, 6025 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:21,458 INFO L231 Difference]: Finished difference. Result has 261 places, 409 transitions, 5186 flow [2024-05-12 13:06:21,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5186, PETRI_PLACES=261, PETRI_TRANSITIONS=409} [2024-05-12 13:06:21,459 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 206 predicate places. [2024-05-12 13:06:21,459 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 409 transitions, 5186 flow [2024-05-12 13:06:21,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:21,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:21,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:06:21,460 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:21,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -905225349, now seen corresponding path program 4 times [2024-05-12 13:06:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:21,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659631042] [2024-05-12 13:06:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:22,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:22,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659631042] [2024-05-12 13:06:22,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659631042] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:22,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:22,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137115969] [2024-05-12 13:06:22,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:22,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:22,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:22,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 409 transitions, 5186 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:22,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:22,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:24,521 INFO L124 PetriNetUnfolderBase]: 7595/12600 cut-off events. [2024-05-12 13:06:24,522 INFO L125 PetriNetUnfolderBase]: For 472944/472953 co-relation queries the response was YES. [2024-05-12 13:06:24,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85434 conditions, 12600 events. 7595/12600 cut-off events. For 472944/472953 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 90702 event pairs, 1968 based on Foata normal form. 8/12300 useless extension candidates. Maximal degree in co-relation 85312. Up to 10455 conditions per place. [2024-05-12 13:06:24,677 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 332 selfloop transitions, 97 changer transitions 0/439 dead transitions. [2024-05-12 13:06:24,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 439 transitions, 6352 flow [2024-05-12 13:06:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:24,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:06:24,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043731778425656 [2024-05-12 13:06:24,679 INFO L175 Difference]: Start difference. First operand has 261 places, 409 transitions, 5186 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:06:24,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 439 transitions, 6352 flow [2024-05-12 13:06:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 439 transitions, 6188 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:25,617 INFO L231 Difference]: Finished difference. Result has 265 places, 412 transitions, 5306 flow [2024-05-12 13:06:25,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5030, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5306, PETRI_PLACES=265, PETRI_TRANSITIONS=412} [2024-05-12 13:06:25,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 210 predicate places. [2024-05-12 13:06:25,618 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 412 transitions, 5306 flow [2024-05-12 13:06:25,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:25,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:25,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:06:25,619 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:25,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash -201063259, now seen corresponding path program 2 times [2024-05-12 13:06:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:25,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541240490] [2024-05-12 13:06:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541240490] [2024-05-12 13:06:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541240490] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:06:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697615478] [2024-05-12 13:06:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:06:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:06:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:06:26,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:26,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 412 transitions, 5306 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:26,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:26,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:29,391 INFO L124 PetriNetUnfolderBase]: 7781/12844 cut-off events. [2024-05-12 13:06:29,391 INFO L125 PetriNetUnfolderBase]: For 490971/490980 co-relation queries the response was YES. [2024-05-12 13:06:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87233 conditions, 12844 events. 7781/12844 cut-off events. For 490971/490980 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 92094 event pairs, 1814 based on Foata normal form. 14/12571 useless extension candidates. Maximal degree in co-relation 87110. Up to 9221 conditions per place. [2024-05-12 13:06:29,565 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 351 selfloop transitions, 151 changer transitions 0/512 dead transitions. [2024-05-12 13:06:29,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 512 transitions, 6949 flow [2024-05-12 13:06:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:06:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:06:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 309 transitions. [2024-05-12 13:06:29,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-05-12 13:06:29,566 INFO L175 Difference]: Start difference. First operand has 265 places, 412 transitions, 5306 flow. Second operand 12 states and 309 transitions. [2024-05-12 13:06:29,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 512 transitions, 6949 flow [2024-05-12 13:06:30,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 512 transitions, 6783 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:30,618 INFO L231 Difference]: Finished difference. Result has 275 places, 419 transitions, 5579 flow [2024-05-12 13:06:30,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5579, PETRI_PLACES=275, PETRI_TRANSITIONS=419} [2024-05-12 13:06:30,618 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 220 predicate places. [2024-05-12 13:06:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 419 transitions, 5579 flow [2024-05-12 13:06:30,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:30,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:30,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:30,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:06:30,619 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:30,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash -905215894, now seen corresponding path program 6 times [2024-05-12 13:06:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:30,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901602764] [2024-05-12 13:06:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901602764] [2024-05-12 13:06:31,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901602764] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:31,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:31,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363144191] [2024-05-12 13:06:31,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:31,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:31,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:31,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:31,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:31,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 419 transitions, 5579 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:31,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:31,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:31,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:33,907 INFO L124 PetriNetUnfolderBase]: 7877/13119 cut-off events. [2024-05-12 13:06:33,907 INFO L125 PetriNetUnfolderBase]: For 509697/509706 co-relation queries the response was YES. [2024-05-12 13:06:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90758 conditions, 13119 events. 7877/13119 cut-off events. For 509697/509706 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 95598 event pairs, 2032 based on Foata normal form. 8/12797 useless extension candidates. Maximal degree in co-relation 90632. Up to 10522 conditions per place. [2024-05-12 13:06:34,095 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 329 selfloop transitions, 122 changer transitions 0/461 dead transitions. [2024-05-12 13:06:34,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 461 transitions, 7121 flow [2024-05-12 13:06:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:06:34,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025510204081632 [2024-05-12 13:06:34,096 INFO L175 Difference]: Start difference. First operand has 275 places, 419 transitions, 5579 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:06:34,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 461 transitions, 7121 flow [2024-05-12 13:06:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 461 transitions, 6745 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-05-12 13:06:35,463 INFO L231 Difference]: Finished difference. Result has 273 places, 427 transitions, 5723 flow [2024-05-12 13:06:35,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5207, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5723, PETRI_PLACES=273, PETRI_TRANSITIONS=427} [2024-05-12 13:06:35,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 218 predicate places. [2024-05-12 13:06:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 427 transitions, 5723 flow [2024-05-12 13:06:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:06:35,466 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:35,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -905215429, now seen corresponding path program 2 times [2024-05-12 13:06:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725028376] [2024-05-12 13:06:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725028376] [2024-05-12 13:06:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725028376] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:36,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:36,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:36,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403632232] [2024-05-12 13:06:36,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:36,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:36,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:36,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:36,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:06:36,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 427 transitions, 5723 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:36,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:36,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:06:36,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:38,996 INFO L124 PetriNetUnfolderBase]: 7574/12956 cut-off events. [2024-05-12 13:06:38,996 INFO L125 PetriNetUnfolderBase]: For 519996/520043 co-relation queries the response was YES. [2024-05-12 13:06:39,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87995 conditions, 12956 events. 7574/12956 cut-off events. For 519996/520043 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 97622 event pairs, 2570 based on Foata normal form. 49/12605 useless extension candidates. Maximal degree in co-relation 87870. Up to 10620 conditions per place. [2024-05-12 13:06:39,178 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 369 selfloop transitions, 32 changer transitions 0/462 dead transitions. [2024-05-12 13:06:39,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 462 transitions, 6767 flow [2024-05-12 13:06:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:06:39,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49744897959183676 [2024-05-12 13:06:39,179 INFO L175 Difference]: Start difference. First operand has 273 places, 427 transitions, 5723 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:06:39,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 462 transitions, 6767 flow [2024-05-12 13:06:40,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 462 transitions, 6539 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:40,582 INFO L231 Difference]: Finished difference. Result has 277 places, 430 transitions, 5662 flow [2024-05-12 13:06:40,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5662, PETRI_PLACES=277, PETRI_TRANSITIONS=430} [2024-05-12 13:06:40,583 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 222 predicate places. [2024-05-12 13:06:40,583 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 430 transitions, 5662 flow [2024-05-12 13:06:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:40,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:40,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:40,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:06:40,583 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:40,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash -905228914, now seen corresponding path program 7 times [2024-05-12 13:06:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825888936] [2024-05-12 13:06:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:41,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:41,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825888936] [2024-05-12 13:06:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825888936] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:41,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:41,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:41,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629771461] [2024-05-12 13:06:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:41,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:41,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:41,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:41,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:41,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 430 transitions, 5662 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:41,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:41,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:41,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:44,049 INFO L124 PetriNetUnfolderBase]: 7927/13198 cut-off events. [2024-05-12 13:06:44,050 INFO L125 PetriNetUnfolderBase]: For 507511/507520 co-relation queries the response was YES. [2024-05-12 13:06:44,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90600 conditions, 13198 events. 7927/13198 cut-off events. For 507511/507520 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 96265 event pairs, 2045 based on Foata normal form. 8/12880 useless extension candidates. Maximal degree in co-relation 90473. Up to 10901 conditions per place. [2024-05-12 13:06:44,227 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 350 selfloop transitions, 106 changer transitions 0/466 dead transitions. [2024-05-12 13:06:44,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 466 transitions, 6951 flow [2024-05-12 13:06:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:06:44,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49744897959183676 [2024-05-12 13:06:44,229 INFO L175 Difference]: Start difference. First operand has 277 places, 430 transitions, 5662 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:06:44,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 466 transitions, 6951 flow [2024-05-12 13:06:45,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 466 transitions, 6822 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:45,423 INFO L231 Difference]: Finished difference. Result has 279 places, 434 transitions, 5872 flow [2024-05-12 13:06:45,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5872, PETRI_PLACES=279, PETRI_TRANSITIONS=434} [2024-05-12 13:06:45,424 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 224 predicate places. [2024-05-12 13:06:45,424 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 434 transitions, 5872 flow [2024-05-12 13:06:45,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:45,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:45,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:45,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:06:45,424 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:45,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash 534579195, now seen corresponding path program 5 times [2024-05-12 13:06:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:45,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29979650] [2024-05-12 13:06:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:46,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29979650] [2024-05-12 13:06:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29979650] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:46,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:46,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630600510] [2024-05-12 13:06:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:46,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:46,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:46,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 434 transitions, 5872 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:46,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:46,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:46,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:48,556 INFO L124 PetriNetUnfolderBase]: 7913/13182 cut-off events. [2024-05-12 13:06:48,556 INFO L125 PetriNetUnfolderBase]: For 516565/516565 co-relation queries the response was YES. [2024-05-12 13:06:48,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90962 conditions, 13182 events. 7913/13182 cut-off events. For 516565/516565 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 96088 event pairs, 2101 based on Foata normal form. 2/12845 useless extension candidates. Maximal degree in co-relation 90834. Up to 11217 conditions per place. [2024-05-12 13:06:48,740 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 386 selfloop transitions, 64 changer transitions 0/460 dead transitions. [2024-05-12 13:06:48,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 460 transitions, 6910 flow [2024-05-12 13:06:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:06:48,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:06:48,741 INFO L175 Difference]: Start difference. First operand has 279 places, 434 transitions, 5872 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:06:48,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 460 transitions, 6910 flow [2024-05-12 13:06:49,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 460 transitions, 6578 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:49,930 INFO L231 Difference]: Finished difference. Result has 280 places, 434 transitions, 5678 flow [2024-05-12 13:06:49,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5678, PETRI_PLACES=280, PETRI_TRANSITIONS=434} [2024-05-12 13:06:49,931 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 225 predicate places. [2024-05-12 13:06:49,931 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 434 transitions, 5678 flow [2024-05-12 13:06:49,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:49,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:49,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:49,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:06:49,932 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:49,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash -767671839, now seen corresponding path program 6 times [2024-05-12 13:06:49,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:49,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416431266] [2024-05-12 13:06:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:49,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416431266] [2024-05-12 13:06:50,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416431266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:50,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:50,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:50,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807505017] [2024-05-12 13:06:50,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:50,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:50,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:50,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:50,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 434 transitions, 5678 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:50,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:50,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:50,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:53,172 INFO L124 PetriNetUnfolderBase]: 7930/13205 cut-off events. [2024-05-12 13:06:53,173 INFO L125 PetriNetUnfolderBase]: For 521361/521361 co-relation queries the response was YES. [2024-05-12 13:06:53,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90556 conditions, 13205 events. 7930/13205 cut-off events. For 521361/521361 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 96278 event pairs, 2083 based on Foata normal form. 1/12867 useless extension candidates. Maximal degree in co-relation 90427. Up to 11166 conditions per place. [2024-05-12 13:06:53,383 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 370 selfloop transitions, 81 changer transitions 0/461 dead transitions. [2024-05-12 13:06:53,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 461 transitions, 6746 flow [2024-05-12 13:06:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:06:53,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4956268221574344 [2024-05-12 13:06:53,385 INFO L175 Difference]: Start difference. First operand has 280 places, 434 transitions, 5678 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:06:53,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 461 transitions, 6746 flow [2024-05-12 13:06:54,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 461 transitions, 6414 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 13:06:54,739 INFO L231 Difference]: Finished difference. Result has 279 places, 437 transitions, 5572 flow [2024-05-12 13:06:54,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5572, PETRI_PLACES=279, PETRI_TRANSITIONS=437} [2024-05-12 13:06:54,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 224 predicate places. [2024-05-12 13:06:54,740 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 437 transitions, 5572 flow [2024-05-12 13:06:54,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:54,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:54,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:54,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:06:54,741 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:54,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash -523623189, now seen corresponding path program 7 times [2024-05-12 13:06:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:54,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524940203] [2024-05-12 13:06:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:54,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:55,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:55,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524940203] [2024-05-12 13:06:55,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524940203] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:55,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:55,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:55,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295062815] [2024-05-12 13:06:55,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:55,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:55,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:55,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:06:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 437 transitions, 5572 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:06:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:57,937 INFO L124 PetriNetUnfolderBase]: 7944/13307 cut-off events. [2024-05-12 13:06:57,938 INFO L125 PetriNetUnfolderBase]: For 530801/530810 co-relation queries the response was YES. [2024-05-12 13:06:58,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90805 conditions, 13307 events. 7944/13307 cut-off events. For 530801/530810 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 97739 event pairs, 2022 based on Foata normal form. 8/12940 useless extension candidates. Maximal degree in co-relation 90675. Up to 10853 conditions per place. [2024-05-12 13:06:58,168 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 348 selfloop transitions, 106 changer transitions 0/464 dead transitions. [2024-05-12 13:06:58,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 464 transitions, 6782 flow [2024-05-12 13:06:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-05-12 13:06:58,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49854227405247814 [2024-05-12 13:06:58,170 INFO L175 Difference]: Start difference. First operand has 279 places, 437 transitions, 5572 flow. Second operand 7 states and 171 transitions. [2024-05-12 13:06:58,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 464 transitions, 6782 flow [2024-05-12 13:06:59,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 464 transitions, 6584 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:59,711 INFO L231 Difference]: Finished difference. Result has 281 places, 440 transitions, 5656 flow [2024-05-12 13:06:59,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5656, PETRI_PLACES=281, PETRI_TRANSITIONS=440} [2024-05-12 13:06:59,711 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 226 predicate places. [2024-05-12 13:06:59,711 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 440 transitions, 5656 flow [2024-05-12 13:06:59,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:59,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:59,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:59,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:06:59,712 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:59,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash -560095839, now seen corresponding path program 8 times [2024-05-12 13:06:59,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:59,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682822501] [2024-05-12 13:06:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:59,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:00,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682822501] [2024-05-12 13:07:00,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682822501] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:00,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927059197] [2024-05-12 13:07:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:00,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:00,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:00,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 440 transitions, 5656 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:00,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:00,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:00,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:02,926 INFO L124 PetriNetUnfolderBase]: 7939/13287 cut-off events. [2024-05-12 13:07:02,926 INFO L125 PetriNetUnfolderBase]: For 527695/527704 co-relation queries the response was YES. [2024-05-12 13:07:03,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90887 conditions, 13287 events. 7939/13287 cut-off events. For 527695/527704 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 97554 event pairs, 2019 based on Foata normal form. 7/12921 useless extension candidates. Maximal degree in co-relation 90756. Up to 10848 conditions per place. [2024-05-12 13:07:03,142 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 337 selfloop transitions, 116 changer transitions 0/463 dead transitions. [2024-05-12 13:07:03,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 463 transitions, 6678 flow [2024-05-12 13:07:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-05-12 13:07:03,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49271137026239065 [2024-05-12 13:07:03,145 INFO L175 Difference]: Start difference. First operand has 281 places, 440 transitions, 5656 flow. Second operand 7 states and 169 transitions. [2024-05-12 13:07:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 463 transitions, 6678 flow [2024-05-12 13:07:04,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 463 transitions, 6399 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-05-12 13:07:04,687 INFO L231 Difference]: Finished difference. Result has 283 places, 440 transitions, 5615 flow [2024-05-12 13:07:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5615, PETRI_PLACES=283, PETRI_TRANSITIONS=440} [2024-05-12 13:07:04,688 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 228 predicate places. [2024-05-12 13:07:04,688 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 440 transitions, 5615 flow [2024-05-12 13:07:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:04,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:07:04,688 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash 246247703, now seen corresponding path program 3 times [2024-05-12 13:07:04,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753720027] [2024-05-12 13:07:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:05,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:05,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753720027] [2024-05-12 13:07:05,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753720027] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:05,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:05,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:07:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013004089] [2024-05-12 13:07:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:07:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:05,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:07:05,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:07:05,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:05,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 440 transitions, 5615 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:05,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:05,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:05,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:08,672 INFO L124 PetriNetUnfolderBase]: 8125/13530 cut-off events. [2024-05-12 13:07:08,672 INFO L125 PetriNetUnfolderBase]: For 555071/555071 co-relation queries the response was YES. [2024-05-12 13:07:08,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92572 conditions, 13530 events. 8125/13530 cut-off events. For 555071/555071 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 99327 event pairs, 2017 based on Foata normal form. 12/13190 useless extension candidates. Maximal degree in co-relation 92441. Up to 10421 conditions per place. [2024-05-12 13:07:08,909 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 374 selfloop transitions, 154 changer transitions 0/538 dead transitions. [2024-05-12 13:07:08,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 538 transitions, 7312 flow [2024-05-12 13:07:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:07:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:07:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 307 transitions. [2024-05-12 13:07:08,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2024-05-12 13:07:08,910 INFO L175 Difference]: Start difference. First operand has 283 places, 440 transitions, 5615 flow. Second operand 12 states and 307 transitions. [2024-05-12 13:07:08,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 538 transitions, 7312 flow [2024-05-12 13:07:10,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 538 transitions, 7042 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:10,485 INFO L231 Difference]: Finished difference. Result has 290 places, 447 transitions, 5773 flow [2024-05-12 13:07:10,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5773, PETRI_PLACES=290, PETRI_TRANSITIONS=447} [2024-05-12 13:07:10,485 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 235 predicate places. [2024-05-12 13:07:10,486 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 447 transitions, 5773 flow [2024-05-12 13:07:10,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:10,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:10,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:10,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 13:07:10,486 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:10,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2003154017, now seen corresponding path program 4 times [2024-05-12 13:07:10,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:10,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495682430] [2024-05-12 13:07:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:10,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495682430] [2024-05-12 13:07:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495682430] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:11,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:07:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804228973] [2024-05-12 13:07:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:07:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:07:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:07:11,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:11,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 447 transitions, 5773 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:11,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:11,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:11,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:14,849 INFO L124 PetriNetUnfolderBase]: 8390/14034 cut-off events. [2024-05-12 13:07:14,849 INFO L125 PetriNetUnfolderBase]: For 579102/579102 co-relation queries the response was YES. [2024-05-12 13:07:14,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96454 conditions, 14034 events. 8390/14034 cut-off events. For 579102/579102 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 104084 event pairs, 2027 based on Foata normal form. 12/13700 useless extension candidates. Maximal degree in co-relation 96320. Up to 10814 conditions per place. [2024-05-12 13:07:15,056 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 373 selfloop transitions, 176 changer transitions 0/559 dead transitions. [2024-05-12 13:07:15,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 559 transitions, 7617 flow [2024-05-12 13:07:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 13:07:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 13:07:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 331 transitions. [2024-05-12 13:07:15,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196232339089482 [2024-05-12 13:07:15,058 INFO L175 Difference]: Start difference. First operand has 290 places, 447 transitions, 5773 flow. Second operand 13 states and 331 transitions. [2024-05-12 13:07:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 559 transitions, 7617 flow [2024-05-12 13:07:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 559 transitions, 7272 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-05-12 13:07:16,730 INFO L231 Difference]: Finished difference. Result has 297 places, 460 transitions, 6001 flow [2024-05-12 13:07:16,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6001, PETRI_PLACES=297, PETRI_TRANSITIONS=460} [2024-05-12 13:07:16,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 242 predicate places. [2024-05-12 13:07:16,731 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 460 transitions, 6001 flow [2024-05-12 13:07:16,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:16,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:16,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:16,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 13:07:16,732 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:16,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1273251481, now seen corresponding path program 5 times [2024-05-12 13:07:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:16,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137029733] [2024-05-12 13:07:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:16,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:17,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:17,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137029733] [2024-05-12 13:07:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137029733] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:17,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:17,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:07:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553771568] [2024-05-12 13:07:17,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:07:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:07:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:07:17,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:17,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 460 transitions, 6001 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:17,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:17,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:17,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:20,711 INFO L124 PetriNetUnfolderBase]: 8463/14184 cut-off events. [2024-05-12 13:07:20,711 INFO L125 PetriNetUnfolderBase]: For 575518/575518 co-relation queries the response was YES. [2024-05-12 13:07:20,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97104 conditions, 14184 events. 8463/14184 cut-off events. For 575518/575518 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 105591 event pairs, 2083 based on Foata normal form. 12/13841 useless extension candidates. Maximal degree in co-relation 96967. Up to 10929 conditions per place. [2024-05-12 13:07:20,973 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 378 selfloop transitions, 170 changer transitions 0/558 dead transitions. [2024-05-12 13:07:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 558 transitions, 7666 flow [2024-05-12 13:07:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 13:07:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 13:07:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 333 transitions. [2024-05-12 13:07:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227629513343799 [2024-05-12 13:07:20,975 INFO L175 Difference]: Start difference. First operand has 297 places, 460 transitions, 6001 flow. Second operand 13 states and 333 transitions. [2024-05-12 13:07:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 558 transitions, 7666 flow [2024-05-12 13:07:22,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 558 transitions, 7339 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:22,938 INFO L231 Difference]: Finished difference. Result has 304 places, 461 transitions, 6050 flow [2024-05-12 13:07:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6050, PETRI_PLACES=304, PETRI_TRANSITIONS=461} [2024-05-12 13:07:22,938 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 249 predicate places. [2024-05-12 13:07:22,938 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 461 transitions, 6050 flow [2024-05-12 13:07:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:22,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:22,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:22,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 13:07:22,939 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:22,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 930051899, now seen corresponding path program 6 times [2024-05-12 13:07:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:22,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905245276] [2024-05-12 13:07:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:23,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:23,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905245276] [2024-05-12 13:07:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905245276] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:23,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:23,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:07:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266315261] [2024-05-12 13:07:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:23,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:07:23,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:07:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:07:24,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:24,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 461 transitions, 6050 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:24,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:24,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:24,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:27,260 INFO L124 PetriNetUnfolderBase]: 8443/13883 cut-off events. [2024-05-12 13:07:27,261 INFO L125 PetriNetUnfolderBase]: For 563223/563223 co-relation queries the response was YES. [2024-05-12 13:07:27,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95167 conditions, 13883 events. 8443/13883 cut-off events. For 563223/563223 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 100758 event pairs, 1747 based on Foata normal form. 12/13616 useless extension candidates. Maximal degree in co-relation 95028. Up to 8930 conditions per place. [2024-05-12 13:07:27,481 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 349 selfloop transitions, 191 changer transitions 0/550 dead transitions. [2024-05-12 13:07:27,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 550 transitions, 7566 flow [2024-05-12 13:07:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 13:07:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 13:07:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 307 transitions. [2024-05-12 13:07:27,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2024-05-12 13:07:27,502 INFO L175 Difference]: Start difference. First operand has 304 places, 461 transitions, 6050 flow. Second operand 12 states and 307 transitions. [2024-05-12 13:07:27,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 550 transitions, 7566 flow [2024-05-12 13:07:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 550 transitions, 6987 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-05-12 13:07:29,022 INFO L231 Difference]: Finished difference. Result has 301 places, 460 transitions, 5787 flow [2024-05-12 13:07:29,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5787, PETRI_PLACES=301, PETRI_TRANSITIONS=460} [2024-05-12 13:07:29,022 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 246 predicate places. [2024-05-12 13:07:29,023 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 460 transitions, 5787 flow [2024-05-12 13:07:29,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:29,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:29,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 13:07:29,032 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:29,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1848947077, now seen corresponding path program 3 times [2024-05-12 13:07:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938355561] [2024-05-12 13:07:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:30,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:30,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938355561] [2024-05-12 13:07:30,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938355561] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:30,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:30,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:30,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323598369] [2024-05-12 13:07:30,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:30,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:30,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:30,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:07:30,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 460 transitions, 5787 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:30,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:30,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:07:30,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:32,842 INFO L124 PetriNetUnfolderBase]: 8123/14294 cut-off events. [2024-05-12 13:07:32,842 INFO L125 PetriNetUnfolderBase]: For 563071/563144 co-relation queries the response was YES. [2024-05-12 13:07:32,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91330 conditions, 14294 events. 8123/14294 cut-off events. For 563071/563144 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 112400 event pairs, 3177 based on Foata normal form. 75/13863 useless extension candidates. Maximal degree in co-relation 91193. Up to 11513 conditions per place. [2024-05-12 13:07:33,072 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 407 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2024-05-12 13:07:33,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 492 transitions, 6885 flow [2024-05-12 13:07:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:07:33,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846938775510204 [2024-05-12 13:07:33,074 INFO L175 Difference]: Start difference. First operand has 301 places, 460 transitions, 5787 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:07:33,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 492 transitions, 6885 flow [2024-05-12 13:07:34,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 492 transitions, 6400 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-05-12 13:07:34,233 INFO L231 Difference]: Finished difference. Result has 298 places, 463 transitions, 5449 flow [2024-05-12 13:07:34,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5449, PETRI_PLACES=298, PETRI_TRANSITIONS=463} [2024-05-12 13:07:34,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 243 predicate places. [2024-05-12 13:07:34,233 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 463 transitions, 5449 flow [2024-05-12 13:07:34,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:34,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:34,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 13:07:34,234 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1849452532, now seen corresponding path program 8 times [2024-05-12 13:07:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:34,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941396425] [2024-05-12 13:07:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:35,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941396425] [2024-05-12 13:07:35,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941396425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:35,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:35,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:35,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233491646] [2024-05-12 13:07:35,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:35,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:35,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:35,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:35,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 463 transitions, 5449 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:35,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:35,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:35,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:38,351 INFO L124 PetriNetUnfolderBase]: 8568/14805 cut-off events. [2024-05-12 13:07:38,352 INFO L125 PetriNetUnfolderBase]: For 581556/581565 co-relation queries the response was YES. [2024-05-12 13:07:38,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93946 conditions, 14805 events. 8568/14805 cut-off events. For 581556/581565 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 113884 event pairs, 2198 based on Foata normal form. 8/14317 useless extension candidates. Maximal degree in co-relation 93809. Up to 11235 conditions per place. [2024-05-12 13:07:38,540 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 348 selfloop transitions, 154 changer transitions 0/512 dead transitions. [2024-05-12 13:07:38,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 512 transitions, 7281 flow [2024-05-12 13:07:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:07:38,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49744897959183676 [2024-05-12 13:07:38,541 INFO L175 Difference]: Start difference. First operand has 298 places, 463 transitions, 5449 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:07:38,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 512 transitions, 7281 flow [2024-05-12 13:07:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 512 transitions, 7164 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:39,672 INFO L231 Difference]: Finished difference. Result has 302 places, 480 transitions, 6066 flow [2024-05-12 13:07:39,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6066, PETRI_PLACES=302, PETRI_TRANSITIONS=480} [2024-05-12 13:07:39,672 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 247 predicate places. [2024-05-12 13:07:39,673 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 480 transitions, 6066 flow [2024-05-12 13:07:39,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:39,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:39,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:39,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 13:07:39,673 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:39,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1864184197, now seen corresponding path program 4 times [2024-05-12 13:07:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:39,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457621824] [2024-05-12 13:07:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:40,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457621824] [2024-05-12 13:07:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457621824] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:40,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615725322] [2024-05-12 13:07:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:07:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 480 transitions, 6066 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:07:40,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:43,689 INFO L124 PetriNetUnfolderBase]: 8253/14439 cut-off events. [2024-05-12 13:07:43,690 INFO L125 PetriNetUnfolderBase]: For 608590/608637 co-relation queries the response was YES. [2024-05-12 13:07:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93305 conditions, 14439 events. 8253/14439 cut-off events. For 608590/608637 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 113052 event pairs, 2741 based on Foata normal form. 43/13973 useless extension candidates. Maximal degree in co-relation 93165. Up to 11630 conditions per place. [2024-05-12 13:07:43,972 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 411 selfloop transitions, 31 changer transitions 0/512 dead transitions. [2024-05-12 13:07:43,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 512 transitions, 7202 flow [2024-05-12 13:07:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-05-12 13:07:43,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872448979591837 [2024-05-12 13:07:43,974 INFO L175 Difference]: Start difference. First operand has 302 places, 480 transitions, 6066 flow. Second operand 8 states and 191 transitions. [2024-05-12 13:07:43,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 512 transitions, 7202 flow [2024-05-12 13:07:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 512 transitions, 6936 flow, removed 76 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:45,367 INFO L231 Difference]: Finished difference. Result has 307 places, 483 transitions, 5976 flow [2024-05-12 13:07:45,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5976, PETRI_PLACES=307, PETRI_TRANSITIONS=483} [2024-05-12 13:07:45,368 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 252 predicate places. [2024-05-12 13:07:45,368 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 483 transitions, 5976 flow [2024-05-12 13:07:45,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:45,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:45,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:45,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 13:07:45,368 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:45,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1849452067, now seen corresponding path program 5 times [2024-05-12 13:07:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:45,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82982288] [2024-05-12 13:07:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:45,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82982288] [2024-05-12 13:07:46,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82982288] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:46,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:46,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:46,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314468189] [2024-05-12 13:07:46,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:46,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:07:46,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 483 transitions, 5976 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:46,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:46,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:07:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:49,254 INFO L124 PetriNetUnfolderBase]: 8261/14475 cut-off events. [2024-05-12 13:07:49,254 INFO L125 PetriNetUnfolderBase]: For 608418/608463 co-relation queries the response was YES. [2024-05-12 13:07:49,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92822 conditions, 14475 events. 8261/14475 cut-off events. For 608418/608463 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 113352 event pairs, 2730 based on Foata normal form. 40/14002 useless extension candidates. Maximal degree in co-relation 92680. Up to 11545 conditions per place. [2024-05-12 13:07:49,435 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 400 selfloop transitions, 52 changer transitions 0/522 dead transitions. [2024-05-12 13:07:49,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 522 transitions, 7260 flow [2024-05-12 13:07:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:07:49,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-05-12 13:07:49,437 INFO L175 Difference]: Start difference. First operand has 307 places, 483 transitions, 5976 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:07:49,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 522 transitions, 7260 flow [2024-05-12 13:07:51,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 522 transitions, 7030 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:51,223 INFO L231 Difference]: Finished difference. Result has 311 places, 494 transitions, 6141 flow [2024-05-12 13:07:51,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5828, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6141, PETRI_PLACES=311, PETRI_TRANSITIONS=494} [2024-05-12 13:07:51,224 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 256 predicate places. [2024-05-12 13:07:51,224 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 494 transitions, 6141 flow [2024-05-12 13:07:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:51,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:51,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:51,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 13:07:51,224 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:51,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 572684098, now seen corresponding path program 9 times [2024-05-12 13:07:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364532827] [2024-05-12 13:07:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:51,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:52,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:52,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364532827] [2024-05-12 13:07:52,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364532827] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:52,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:52,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:52,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000409079] [2024-05-12 13:07:52,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:52,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:52,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:52,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 494 transitions, 6141 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:52,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:52,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:55,694 INFO L124 PetriNetUnfolderBase]: 8638/14595 cut-off events. [2024-05-12 13:07:55,694 INFO L125 PetriNetUnfolderBase]: For 632061/632070 co-relation queries the response was YES. [2024-05-12 13:07:55,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97465 conditions, 14595 events. 8638/14595 cut-off events. For 632061/632070 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 110134 event pairs, 2203 based on Foata normal form. 8/14184 useless extension candidates. Maximal degree in co-relation 97320. Up to 11875 conditions per place. [2024-05-12 13:07:55,943 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 404 selfloop transitions, 112 changer transitions 0/526 dead transitions. [2024-05-12 13:07:55,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 526 transitions, 7434 flow [2024-05-12 13:07:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-05-12 13:07:55,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872448979591837 [2024-05-12 13:07:55,944 INFO L175 Difference]: Start difference. First operand has 311 places, 494 transitions, 6141 flow. Second operand 8 states and 191 transitions. [2024-05-12 13:07:55,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 526 transitions, 7434 flow [2024-05-12 13:07:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 526 transitions, 7302 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:57,807 INFO L231 Difference]: Finished difference. Result has 316 places, 498 transitions, 6365 flow [2024-05-12 13:07:57,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6009, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6365, PETRI_PLACES=316, PETRI_TRANSITIONS=498} [2024-05-12 13:07:57,811 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 261 predicate places. [2024-05-12 13:07:57,811 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 498 transitions, 6365 flow [2024-05-12 13:07:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:57,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:57,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:57,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 13:07:57,811 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1864184662, now seen corresponding path program 10 times [2024-05-12 13:07:57,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836506067] [2024-05-12 13:07:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:58,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:58,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836506067] [2024-05-12 13:07:58,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836506067] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:58,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:58,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323097815] [2024-05-12 13:07:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:58,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:59,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 13:07:59,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 498 transitions, 6365 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:07:59,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:59,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 13:07:59,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:02,383 INFO L124 PetriNetUnfolderBase]: 8654/14610 cut-off events. [2024-05-12 13:08:02,383 INFO L125 PetriNetUnfolderBase]: For 639017/639026 co-relation queries the response was YES. [2024-05-12 13:08:02,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98565 conditions, 14610 events. 8654/14610 cut-off events. For 639017/639026 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 110126 event pairs, 2199 based on Foata normal form. 8/14202 useless extension candidates. Maximal degree in co-relation 98418. Up to 11809 conditions per place. [2024-05-12 13:08:02,580 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 407 selfloop transitions, 116 changer transitions 0/533 dead transitions. [2024-05-12 13:08:02,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 533 transitions, 7891 flow [2024-05-12 13:08:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:08:02,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2024-05-12 13:08:02,582 INFO L175 Difference]: Start difference. First operand has 316 places, 498 transitions, 6365 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:08:02,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 533 transitions, 7891 flow [2024-05-12 13:08:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 533 transitions, 7566 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:04,605 INFO L231 Difference]: Finished difference. Result has 319 places, 504 transitions, 6489 flow [2024-05-12 13:08:04,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6489, PETRI_PLACES=319, PETRI_TRANSITIONS=504} [2024-05-12 13:08:04,606 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 264 predicate places. [2024-05-12 13:08:04,606 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 504 transitions, 6489 flow [2024-05-12 13:08:04,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:04,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:04,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 13:08:04,607 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:04,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 542321011, now seen corresponding path program 1 times [2024-05-12 13:08:04,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:04,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162105680] [2024-05-12 13:08:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162105680] [2024-05-12 13:08:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162105680] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536559199] [2024-05-12 13:08:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:05,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:05,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:05,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:05,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:08:05,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 504 transitions, 6489 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:05,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:05,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:08:05,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:08,879 INFO L124 PetriNetUnfolderBase]: 8307/14121 cut-off events. [2024-05-12 13:08:08,880 INFO L125 PetriNetUnfolderBase]: For 657626/657732 co-relation queries the response was YES. [2024-05-12 13:08:09,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96520 conditions, 14121 events. 8307/14121 cut-off events. For 657626/657732 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 107219 event pairs, 3083 based on Foata normal form. 51/13816 useless extension candidates. Maximal degree in co-relation 96371. Up to 11794 conditions per place. [2024-05-12 13:08:09,211 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 484 selfloop transitions, 27 changer transitions 0/543 dead transitions. [2024-05-12 13:08:09,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 543 transitions, 7735 flow [2024-05-12 13:08:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 13:08:09,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-05-12 13:08:09,213 INFO L175 Difference]: Start difference. First operand has 319 places, 504 transitions, 6489 flow. Second operand 8 states and 198 transitions. [2024-05-12 13:08:09,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 543 transitions, 7735 flow [2024-05-12 13:08:11,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 543 transitions, 7491 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:11,176 INFO L231 Difference]: Finished difference. Result has 323 places, 507 transitions, 6375 flow [2024-05-12 13:08:11,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6375, PETRI_PLACES=323, PETRI_TRANSITIONS=507} [2024-05-12 13:08:11,177 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 268 predicate places. [2024-05-12 13:08:11,177 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 507 transitions, 6375 flow [2024-05-12 13:08:11,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:11,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:11,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:11,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 13:08:11,178 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:11,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1021044502, now seen corresponding path program 1 times [2024-05-12 13:08:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:11,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549611389] [2024-05-12 13:08:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:11,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549611389] [2024-05-12 13:08:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549611389] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24777150] [2024-05-12 13:08:12,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:12,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:12,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:12,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:08:12,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 507 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:12,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:12,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:08:12,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:15,663 INFO L124 PetriNetUnfolderBase]: 8363/14205 cut-off events. [2024-05-12 13:08:15,663 INFO L125 PetriNetUnfolderBase]: For 684200/684300 co-relation queries the response was YES. [2024-05-12 13:08:15,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97757 conditions, 14205 events. 8363/14205 cut-off events. For 684200/684300 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 107850 event pairs, 3091 based on Foata normal form. 56/13907 useless extension candidates. Maximal degree in co-relation 97606. Up to 11843 conditions per place. [2024-05-12 13:08:15,853 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 489 selfloop transitions, 22 changer transitions 0/543 dead transitions. [2024-05-12 13:08:15,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 543 transitions, 7617 flow [2024-05-12 13:08:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:08:15,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49744897959183676 [2024-05-12 13:08:15,855 INFO L175 Difference]: Start difference. First operand has 323 places, 507 transitions, 6375 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:08:15,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 543 transitions, 7617 flow [2024-05-12 13:08:17,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 543 transitions, 7509 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:17,698 INFO L231 Difference]: Finished difference. Result has 325 places, 511 transitions, 6392 flow [2024-05-12 13:08:17,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6267, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6392, PETRI_PLACES=325, PETRI_TRANSITIONS=511} [2024-05-12 13:08:17,699 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 270 predicate places. [2024-05-12 13:08:17,699 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 511 transitions, 6392 flow [2024-05-12 13:08:17,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:17,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:17,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:17,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 13:08:17,700 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:17,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash 296606548, now seen corresponding path program 2 times [2024-05-12 13:08:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:17,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196710140] [2024-05-12 13:08:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:17,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:18,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:18,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196710140] [2024-05-12 13:08:18,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196710140] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:18,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:18,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:18,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674502135] [2024-05-12 13:08:18,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:18,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 13:08:18,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 511 transitions, 6392 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:18,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 13:08:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:22,277 INFO L124 PetriNetUnfolderBase]: 8409/14260 cut-off events. [2024-05-12 13:08:22,277 INFO L125 PetriNetUnfolderBase]: For 698301/698401 co-relation queries the response was YES. [2024-05-12 13:08:22,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99590 conditions, 14260 events. 8409/14260 cut-off events. For 698301/698401 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 108137 event pairs, 3086 based on Foata normal form. 54/13961 useless extension candidates. Maximal degree in co-relation 99438. Up to 11892 conditions per place. [2024-05-12 13:08:22,690 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 487 selfloop transitions, 27 changer transitions 0/546 dead transitions. [2024-05-12 13:08:22,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 546 transitions, 7644 flow [2024-05-12 13:08:22,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-05-12 13:08:22,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49744897959183676 [2024-05-12 13:08:22,693 INFO L175 Difference]: Start difference. First operand has 325 places, 511 transitions, 6392 flow. Second operand 8 states and 195 transitions. [2024-05-12 13:08:22,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 546 transitions, 7644 flow [2024-05-12 13:08:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 546 transitions, 7549 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:25,068 INFO L231 Difference]: Finished difference. Result has 327 places, 515 transitions, 6432 flow [2024-05-12 13:08:25,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6297, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6432, PETRI_PLACES=327, PETRI_TRANSITIONS=515} [2024-05-12 13:08:25,069 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 272 predicate places. [2024-05-12 13:08:25,069 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 515 transitions, 6432 flow [2024-05-12 13:08:25,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:08:25,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:25,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:08:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 13:08:25,070 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:25,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 296613988, now seen corresponding path program 3 times [2024-05-12 13:08:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557193237] [2024-05-12 13:08:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat