./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/mix010.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/mix010.opt.i ./goblint.2024-05-07_14-17-48.files/protection/mix010.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 13:05:50,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:05:50,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:05:50,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:05:50,827 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:05:50,850 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:05:50,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:05:50,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:05:50,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:05:50,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:05:50,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:05:50,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:05:50,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:05:50,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:05:50,856 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:05:50,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:05:50,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:05:50,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:05:50,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:05:50,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:05:50,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:05:50,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:05:50,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:05:50,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:05:50,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:05:50,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:05:50,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:05:50,862 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:05:50,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:05:50,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:05:50,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:05:50,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:05:50,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:05:50,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:05:50,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:05:50,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:05:50,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:05:50,866 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:05:51,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:05:51,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:05:51,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:05:51,056 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:05:51,056 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:05:51,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix010.opt.yml/witness.yml [2024-05-12 13:05:51,225 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:05:51,225 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:05:51,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-05-12 13:05:52,236 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:05:52,413 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:05:52,414 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-05-12 13:05:52,424 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aadc1b0ba/4fec3a90a3294ae294dbba889ce2421d/FLAG08435964a [2024-05-12 13:05:52,443 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aadc1b0ba/4fec3a90a3294ae294dbba889ce2421d [2024-05-12 13:05:52,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:05:52,445 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:05:52,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:05:52,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:05:52,450 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:05:52,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:05:51" (1/2) ... [2024-05-12 13:05:52,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b56d55c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:05:52, skipping insertion in model container [2024-05-12 13:05:52,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:05:51" (1/2) ... [2024-05-12 13:05:52,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39fcd0ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:05:52, skipping insertion in model container [2024-05-12 13:05:52,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:05:52" (2/2) ... [2024-05-12 13:05:52,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b56d55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:52, skipping insertion in model container [2024-05-12 13:05:52,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:05:52" (2/2) ... [2024-05-12 13:05:52,455 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:05:52,539 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:05:52,540 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-05-12 13:05:52,541 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-05-12 13:05:52,541 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-05-12 13:05:52,541 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:05:52,541 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-05-12 13:05:52,576 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:05:52,728 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/mix010.opt.i[944,957] [2024-05-12 13:05:52,876 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:05:52,887 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:05:52,919 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/mix010.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:05:53,011 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:05:53,038 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:05:53,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53 WrapperNode [2024-05-12 13:05:53,039 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:05:53,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:05:53,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:05:53,041 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:05:53,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,060 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,088 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 157 [2024-05-12 13:05:53,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:05:53,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:05:53,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:05:53,089 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:05:53,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,115 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 13:05:53,118 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,154 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:05:53,155 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:05:53,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:05:53,155 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:05:53,156 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (1/1) ... [2024-05-12 13:05:53,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:05:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:05:53,181 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 13:05:53,198 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 13:05:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:05:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:05:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:05:53,213 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:05:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:05:53,213 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:05:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:05:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:05:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:05:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:05:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:05:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:05:53,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:05:53,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:05:53,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:05:53,218 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 13:05:53,358 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:05:53,360 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:05:53,690 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:05:53,690 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:05:53,828 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:05:53,828 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:05:53,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:05:53 BoogieIcfgContainer [2024-05-12 13:05:53,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:05:53,831 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:05:53,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:05:53,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:05:53,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:05:51" (1/4) ... [2024-05-12 13:05:53,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f38460 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:05:53, skipping insertion in model container [2024-05-12 13:05:53,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:05:52" (2/4) ... [2024-05-12 13:05:53,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f38460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:05:53, skipping insertion in model container [2024-05-12 13:05:53,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:05:53" (3/4) ... [2024-05-12 13:05:53,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f38460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:05:53, skipping insertion in model container [2024-05-12 13:05:53,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:05:53" (4/4) ... [2024-05-12 13:05:53,837 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-05-12 13:05:53,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:05:53,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:05:53,850 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:05:53,889 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:05:53,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:05:53,944 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-05-12 13:05:53,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:05:53,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 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. 0/41 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-05-12 13:05:53,947 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-05-12 13:05:53,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-05-12 13:05:53,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:05:53,967 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;@3f6ecd34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:05:53,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:05:53,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:05:53,971 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:05:53,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:05:53,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:53,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:05:53,973 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 13:05:53,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1504665209, now seen corresponding path program 1 times [2024-05-12 13:05:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:54,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662267982] [2024-05-12 13:05:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:54,969 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 13:05:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662267982] [2024-05-12 13:05:54,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662267982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:54,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:54,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:05:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262478779] [2024-05-12 13:05:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:54,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:05:55,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:05:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:05:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-05-12 13:05:55,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 13:05:55,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:55,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-05-12 13:05:55,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:55,621 INFO L124 PetriNetUnfolderBase]: 2860/4839 cut-off events. [2024-05-12 13:05:55,622 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-05-12 13:05:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 4839 events. 2860/4839 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 32217 event pairs, 2250 based on Foata normal form. 145/4588 useless extension candidates. Maximal degree in co-relation 9035. Up to 4134 conditions per place. [2024-05-12 13:05:55,642 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 42 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-05-12 13:05:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 231 flow [2024-05-12 13:05:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:05:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:05:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-05-12 13:05:55,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-05-12 13:05:55,652 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 103 transitions. [2024-05-12 13:05:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 231 flow [2024-05-12 13:05:55,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:05:55,656 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-05-12 13:05:55,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-05-12 13:05:55,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-05-12 13:05:55,660 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-05-12 13:05:55,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 13:05:55,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:55,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:05:55,661 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 13:05:55,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:55,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1420766502, now seen corresponding path program 1 times [2024-05-12 13:05:55,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:55,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772281694] [2024-05-12 13:05:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:55,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:56,391 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 13:05:56,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:56,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772281694] [2024-05-12 13:05:56,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772281694] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:56,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:56,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:05:56,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683587654] [2024-05-12 13:05:56,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:05:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:05:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:05:56,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:05:56,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 13:05:56,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:56,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:05:56,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:56,918 INFO L124 PetriNetUnfolderBase]: 3263/4979 cut-off events. [2024-05-12 13:05:56,919 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-05-12 13:05:56,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10934 conditions, 4979 events. 3263/4979 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30241 event pairs, 1610 based on Foata normal form. 3/4760 useless extension candidates. Maximal degree in co-relation 10919. Up to 4679 conditions per place. [2024-05-12 13:05:56,941 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 54 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-05-12 13:05:56,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 327 flow [2024-05-12 13:05:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:05:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:05:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-05-12 13:05:56,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-05-12 13:05:56,943 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 130 transitions. [2024-05-12 13:05:56,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 327 flow [2024-05-12 13:05:56,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:05:56,945 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-05-12 13:05:56,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-05-12 13:05:56,946 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-05-12 13:05:56,946 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-05-12 13:05:56,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 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 13:05:56,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:56,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:56,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:05:56,947 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 13:05:56,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash -846116127, now seen corresponding path program 1 times [2024-05-12 13:05:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:56,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168550341] [2024-05-12 13:05:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:56,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:57,875 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 13:05:57,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:57,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168550341] [2024-05-12 13:05:57,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168550341] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:57,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:57,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:05:57,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219151695] [2024-05-12 13:05:57,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:57,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:05:57,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:05:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:05:57,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:05:57,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 13:05:57,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:57,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:05:57,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:05:58,653 INFO L124 PetriNetUnfolderBase]: 4155/6627 cut-off events. [2024-05-12 13:05:58,654 INFO L125 PetriNetUnfolderBase]: For 2385/2385 co-relation queries the response was YES. [2024-05-12 13:05:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 6627 events. 4155/6627 cut-off events. For 2385/2385 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41740 event pairs, 1572 based on Foata normal form. 6/6224 useless extension candidates. Maximal degree in co-relation 15360. Up to 5857 conditions per place. [2024-05-12 13:05:58,691 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 74 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-05-12 13:05:58,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 494 flow [2024-05-12 13:05:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:05:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:05:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 13:05:58,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-05-12 13:05:58,694 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 6 states and 183 transitions. [2024-05-12 13:05:58,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 494 flow [2024-05-12 13:05:58,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 466 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 13:05:58,696 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 241 flow [2024-05-12 13:05:58,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-05-12 13:05:58,697 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-05-12 13:05:58,697 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 241 flow [2024-05-12 13:05:58,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 13:05:58,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:05:58,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:05:58,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:05:58,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:05:58,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:05:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2025568593, now seen corresponding path program 1 times [2024-05-12 13:05:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:05:58,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415059561] [2024-05-12 13:05:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:05:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:05:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:05:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:05:59,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:05:59,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415059561] [2024-05-12 13:05:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415059561] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:05:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:05:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:05:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693291314] [2024-05-12 13:05:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:05:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:05:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:05:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:05:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:05:59,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:05:59,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:05:59,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:05:59,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:05:59,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:00,191 INFO L124 PetriNetUnfolderBase]: 4149/6251 cut-off events. [2024-05-12 13:06:00,191 INFO L125 PetriNetUnfolderBase]: For 4214/4214 co-relation queries the response was YES. [2024-05-12 13:06:00,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16378 conditions, 6251 events. 4149/6251 cut-off events. For 4214/4214 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 36610 event pairs, 1466 based on Foata normal form. 2/5987 useless extension candidates. Maximal degree in co-relation 16359. Up to 5921 conditions per place. [2024-05-12 13:06:00,220 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 63 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-05-12 13:06:00,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 457 flow [2024-05-12 13:06:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:06:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:06:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-05-12 13:06:00,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556 [2024-05-12 13:06:00,222 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 241 flow. Second operand 5 states and 139 transitions. [2024-05-12 13:06:00,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 457 flow [2024-05-12 13:06:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 419 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:00,226 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 262 flow [2024-05-12 13:06:00,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-05-12 13:06:00,226 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:06:00,227 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 262 flow [2024-05-12 13:06:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:00,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:00,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:00,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:06:00,227 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 13:06:00,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1666739279, now seen corresponding path program 1 times [2024-05-12 13:06:00,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:00,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679552924] [2024-05-12 13:06:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:00,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679552924] [2024-05-12 13:06:00,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679552924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:00,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:00,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:00,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031321694] [2024-05-12 13:06:00,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:00,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:01,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:01,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 262 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 13:06:01,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:01,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:01,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:02,007 INFO L124 PetriNetUnfolderBase]: 4888/7300 cut-off events. [2024-05-12 13:06:02,007 INFO L125 PetriNetUnfolderBase]: For 6981/6981 co-relation queries the response was YES. [2024-05-12 13:06:02,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 7300 events. 4888/7300 cut-off events. For 6981/6981 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42667 event pairs, 1754 based on Foata normal form. 2/7019 useless extension candidates. Maximal degree in co-relation 20267. Up to 6939 conditions per place. [2024-05-12 13:06:02,043 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 73 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-05-12 13:06:02,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 532 flow [2024-05-12 13:06:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-05-12 13:06:02,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-05-12 13:06:02,049 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 262 flow. Second operand 6 states and 162 transitions. [2024-05-12 13:06:02,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 532 flow [2024-05-12 13:06:02,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 503 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:02,056 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 306 flow [2024-05-12 13:06:02,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-05-12 13:06:02,058 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-05-12 13:06:02,058 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 306 flow [2024-05-12 13:06:02,058 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 13:06:02,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:02,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:02,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:06:02,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:02,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1631633193, now seen corresponding path program 1 times [2024-05-12 13:06:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:02,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061939254] [2024-05-12 13:06:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:02,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:02,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061939254] [2024-05-12 13:06:02,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061939254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:02,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:02,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:06:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674114608] [2024-05-12 13:06:02,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:06:02,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:06:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:06:02,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 50 [2024-05-12 13:06:02,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 13:06:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 50 [2024-05-12 13:06:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:02,350 INFO L124 PetriNetUnfolderBase]: 1187/2431 cut-off events. [2024-05-12 13:06:02,351 INFO L125 PetriNetUnfolderBase]: For 3468/3808 co-relation queries the response was YES. [2024-05-12 13:06:02,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5884 conditions, 2431 events. 1187/2431 cut-off events. For 3468/3808 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18832 event pairs, 212 based on Foata normal form. 2/2273 useless extension candidates. Maximal degree in co-relation 5862. Up to 1489 conditions per place. [2024-05-12 13:06:02,366 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 28 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-05-12 13:06:02,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 344 flow [2024-05-12 13:06:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:06:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:06:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-05-12 13:06:02,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2024-05-12 13:06:02,368 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 306 flow. Second operand 3 states and 109 transitions. [2024-05-12 13:06:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 344 flow [2024-05-12 13:06:02,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 314 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:02,371 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 242 flow [2024-05-12 13:06:02,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-05-12 13:06:02,373 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-05-12 13:06:02,373 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 242 flow [2024-05-12 13:06:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 13:06:02,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:02,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:02,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:06:02,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:02,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash -956930546, now seen corresponding path program 1 times [2024-05-12 13:06:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:02,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807930161] [2024-05-12 13:06:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:02,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:03,146 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 13:06:03,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:03,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807930161] [2024-05-12 13:06:03,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807930161] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:03,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457448268] [2024-05-12 13:06:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:03,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:03,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 242 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 13:06:03,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:03,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:03,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:04,073 INFO L124 PetriNetUnfolderBase]: 4647/6838 cut-off events. [2024-05-12 13:06:04,074 INFO L125 PetriNetUnfolderBase]: For 12062/12068 co-relation queries the response was YES. [2024-05-12 13:06:04,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19669 conditions, 6838 events. 4647/6838 cut-off events. For 12062/12068 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 38669 event pairs, 1549 based on Foata normal form. 6/6835 useless extension candidates. Maximal degree in co-relation 19648. Up to 6563 conditions per place. [2024-05-12 13:06:04,109 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 74 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-05-12 13:06:04,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 102 transitions, 566 flow [2024-05-12 13:06:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 13:06:04,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-05-12 13:06:04,111 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 242 flow. Second operand 6 states and 165 transitions. [2024-05-12 13:06:04,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 102 transitions, 566 flow [2024-05-12 13:06:04,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 546 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:04,116 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 312 flow [2024-05-12 13:06:04,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-05-12 13:06:04,117 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-05-12 13:06:04,117 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 312 flow [2024-05-12 13:06:04,117 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 13:06:04,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:04,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:04,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:06:04,118 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 13:06:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 165052144, now seen corresponding path program 2 times [2024-05-12 13:06:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:04,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498482965] [2024-05-12 13:06:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:04,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:04,839 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 13:06:04,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498482965] [2024-05-12 13:06:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498482965] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:04,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:04,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630091439] [2024-05-12 13:06:04,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:04,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:04,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:04,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 312 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 13:06:04,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:04,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:04,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:05,766 INFO L124 PetriNetUnfolderBase]: 4642/6832 cut-off events. [2024-05-12 13:06:05,766 INFO L125 PetriNetUnfolderBase]: For 14464/14469 co-relation queries the response was YES. [2024-05-12 13:06:05,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20659 conditions, 6832 events. 4642/6832 cut-off events. For 14464/14469 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 38666 event pairs, 1552 based on Foata normal form. 6/6829 useless extension candidates. Maximal degree in co-relation 20636. Up to 6558 conditions per place. [2024-05-12 13:06:05,801 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 69 selfloop transitions, 16 changer transitions 0/97 dead transitions. [2024-05-12 13:06:05,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 550 flow [2024-05-12 13:06:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 13:06:05,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:06:05,803 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 312 flow. Second operand 6 states and 160 transitions. [2024-05-12 13:06:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 550 flow [2024-05-12 13:06:05,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 516 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:05,813 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 318 flow [2024-05-12 13:06:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-05-12 13:06:05,813 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-05-12 13:06:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 318 flow [2024-05-12 13:06:05,814 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 13:06:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:06:05,814 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 13:06:05,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -951208690, now seen corresponding path program 1 times [2024-05-12 13:06:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:05,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026807728] [2024-05-12 13:06:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:06,668 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 13:06:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:06,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026807728] [2024-05-12 13:06:06,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026807728] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:06,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:06,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:06,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316232656] [2024-05-12 13:06:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:06,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:06,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:06,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:06,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:06,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:06,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:06,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:07,631 INFO L124 PetriNetUnfolderBase]: 4197/6370 cut-off events. [2024-05-12 13:06:07,631 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-05-12 13:06:07,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18921 conditions, 6370 events. 4197/6370 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36925 event pairs, 1357 based on Foata normal form. 4/6362 useless extension candidates. Maximal degree in co-relation 18896. Up to 5934 conditions per place. [2024-05-12 13:06:07,656 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 80 selfloop transitions, 14 changer transitions 5/110 dead transitions. [2024-05-12 13:06:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 630 flow [2024-05-12 13:06:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:06:07,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:06:07,658 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 318 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:06:07,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 630 flow [2024-05-12 13:06:07,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 586 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:07,666 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 338 flow [2024-05-12 13:06:07,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-05-12 13:06:07,667 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-05-12 13:06:07,668 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 338 flow [2024-05-12 13:06:07,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:07,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:07,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:06:07,669 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 13:06:07,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:07,676 INFO L85 PathProgramCache]: Analyzing trace with hash 399804742, now seen corresponding path program 1 times [2024-05-12 13:06:07,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:07,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843808593] [2024-05-12 13:06:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:07,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:08,502 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 13:06:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843808593] [2024-05-12 13:06:08,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843808593] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:08,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:08,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:08,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664608481] [2024-05-12 13:06:08,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:08,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:08,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 338 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:08,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:08,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:08,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:09,447 INFO L124 PetriNetUnfolderBase]: 4069/6014 cut-off events. [2024-05-12 13:06:09,448 INFO L125 PetriNetUnfolderBase]: For 17939/17939 co-relation queries the response was YES. [2024-05-12 13:06:09,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19368 conditions, 6014 events. 4069/6014 cut-off events. For 17939/17939 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33616 event pairs, 1288 based on Foata normal form. 2/6014 useless extension candidates. Maximal degree in co-relation 19343. Up to 5774 conditions per place. [2024-05-12 13:06:09,475 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 87 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-05-12 13:06:09,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 113 transitions, 662 flow [2024-05-12 13:06:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 13:06:09,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-05-12 13:06:09,477 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 338 flow. Second operand 7 states and 185 transitions. [2024-05-12 13:06:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 113 transitions, 662 flow [2024-05-12 13:06:09,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 620 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:09,484 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 364 flow [2024-05-12 13:06:09,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-05-12 13:06:09,486 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-05-12 13:06:09,486 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 364 flow [2024-05-12 13:06:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:09,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:09,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:06:09,487 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 13:06:09,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash 399924712, now seen corresponding path program 2 times [2024-05-12 13:06:09,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:09,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428375461] [2024-05-12 13:06:09,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:09,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:10,324 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 13:06:10,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:10,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428375461] [2024-05-12 13:06:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428375461] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:10,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:10,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584217982] [2024-05-12 13:06:10,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:10,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:10,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:10,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:10,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:11,300 INFO L124 PetriNetUnfolderBase]: 4090/6063 cut-off events. [2024-05-12 13:06:11,300 INFO L125 PetriNetUnfolderBase]: For 22452/22458 co-relation queries the response was YES. [2024-05-12 13:06:11,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20470 conditions, 6063 events. 4090/6063 cut-off events. For 22452/22458 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34027 event pairs, 1294 based on Foata normal form. 6/6065 useless extension candidates. Maximal degree in co-relation 20444. Up to 5717 conditions per place. [2024-05-12 13:06:11,326 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 80 selfloop transitions, 26 changer transitions 0/118 dead transitions. [2024-05-12 13:06:11,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 118 transitions, 768 flow [2024-05-12 13:06:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 13:06:11,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-05-12 13:06:11,328 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 364 flow. Second operand 7 states and 188 transitions. [2024-05-12 13:06:11,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 118 transitions, 768 flow [2024-05-12 13:06:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 724 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:11,338 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 450 flow [2024-05-12 13:06:11,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-05-12 13:06:11,338 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-05-12 13:06:11,338 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 450 flow [2024-05-12 13:06:11,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:11,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:11,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:11,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:06:11,339 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 13:06:11,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash -293004370, now seen corresponding path program 1 times [2024-05-12 13:06:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:11,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410605411] [2024-05-12 13:06:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:12,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:12,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410605411] [2024-05-12 13:06:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410605411] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:12,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814437035] [2024-05-12 13:06:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:12,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:12,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 450 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 13:06:12,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:12,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:12,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:13,261 INFO L124 PetriNetUnfolderBase]: 4356/6344 cut-off events. [2024-05-12 13:06:13,262 INFO L125 PetriNetUnfolderBase]: For 27966/27972 co-relation queries the response was YES. [2024-05-12 13:06:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22469 conditions, 6344 events. 4356/6344 cut-off events. For 27966/27972 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34677 event pairs, 1408 based on Foata normal form. 6/6344 useless extension candidates. Maximal degree in co-relation 22442. Up to 6095 conditions per place. [2024-05-12 13:06:13,296 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-05-12 13:06:13,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 866 flow [2024-05-12 13:06:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 13:06:13,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:06:13,298 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 450 flow. Second operand 7 states and 182 transitions. [2024-05-12 13:06:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 866 flow [2024-05-12 13:06:13,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 824 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:13,318 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 524 flow [2024-05-12 13:06:13,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-05-12 13:06:13,318 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-05-12 13:06:13,318 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 524 flow [2024-05-12 13:06:13,319 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 13:06:13,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:13,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:06:13,319 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 13:06:13,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash 821649734, now seen corresponding path program 3 times [2024-05-12 13:06:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:13,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864683833] [2024-05-12 13:06:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:14,114 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 13:06:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:14,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864683833] [2024-05-12 13:06:14,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864683833] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:14,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:14,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823984765] [2024-05-12 13:06:14,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:14,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:14,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:14,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 524 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:14,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:14,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:14,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:15,182 INFO L124 PetriNetUnfolderBase]: 4118/6097 cut-off events. [2024-05-12 13:06:15,183 INFO L125 PetriNetUnfolderBase]: For 32275/32275 co-relation queries the response was YES. [2024-05-12 13:06:15,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 6097 events. 4118/6097 cut-off events. For 32275/32275 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34215 event pairs, 1298 based on Foata normal form. 2/6092 useless extension candidates. Maximal degree in co-relation 22519. Up to 5744 conditions per place. [2024-05-12 13:06:15,211 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 79 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2024-05-12 13:06:15,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 814 flow [2024-05-12 13:06:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 13:06:15,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2024-05-12 13:06:15,212 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 524 flow. Second operand 7 states and 183 transitions. [2024-05-12 13:06:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 814 flow [2024-05-12 13:06:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 760 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:15,228 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 530 flow [2024-05-12 13:06:15,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-05-12 13:06:15,228 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-05-12 13:06:15,228 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 530 flow [2024-05-12 13:06:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:15,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:15,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:06:15,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:15,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash -286575280, now seen corresponding path program 2 times [2024-05-12 13:06:15,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:15,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103599207] [2024-05-12 13:06:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:15,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:16,012 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 13:06:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103599207] [2024-05-12 13:06:16,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103599207] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:16,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:16,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498318402] [2024-05-12 13:06:16,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:16,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:16,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:16,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 530 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 13:06:16,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:16,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:16,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:16,976 INFO L124 PetriNetUnfolderBase]: 4374/6362 cut-off events. [2024-05-12 13:06:16,976 INFO L125 PetriNetUnfolderBase]: For 35455/35460 co-relation queries the response was YES. [2024-05-12 13:06:16,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23990 conditions, 6362 events. 4374/6362 cut-off events. For 35455/35460 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34713 event pairs, 1403 based on Foata normal form. 6/6364 useless extension candidates. Maximal degree in co-relation 23959. Up to 6112 conditions per place. [2024-05-12 13:06:17,005 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 88 selfloop transitions, 26 changer transitions 0/124 dead transitions. [2024-05-12 13:06:17,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 924 flow [2024-05-12 13:06:17,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 13:06:17,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2024-05-12 13:06:17,007 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 530 flow. Second operand 7 states and 179 transitions. [2024-05-12 13:06:17,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 924 flow [2024-05-12 13:06:17,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 856 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:17,023 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 556 flow [2024-05-12 13:06:17,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-05-12 13:06:17,023 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-05-12 13:06:17,024 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 556 flow [2024-05-12 13:06:17,024 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 13:06:17,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:17,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:17,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:06:17,024 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 13:06:17,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:17,025 INFO L85 PathProgramCache]: Analyzing trace with hash 577293568, now seen corresponding path program 3 times [2024-05-12 13:06:17,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:17,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161560134] [2024-05-12 13:06:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:17,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:17,800 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 13:06:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:17,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161560134] [2024-05-12 13:06:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161560134] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:17,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:06:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268525742] [2024-05-12 13:06:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:06:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:06:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:06:17,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:17,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 556 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 13:06:17,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:17,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:17,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:18,781 INFO L124 PetriNetUnfolderBase]: 4369/6355 cut-off events. [2024-05-12 13:06:18,781 INFO L125 PetriNetUnfolderBase]: For 38201/38206 co-relation queries the response was YES. [2024-05-12 13:06:18,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24173 conditions, 6355 events. 4369/6355 cut-off events. For 38201/38206 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 34668 event pairs, 1403 based on Foata normal form. 6/6357 useless extension candidates. Maximal degree in co-relation 24141. Up to 6107 conditions per place. [2024-05-12 13:06:18,817 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 85 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-05-12 13:06:18,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 860 flow [2024-05-12 13:06:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:06:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:06:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:06:18,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:06:18,818 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 556 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:06:18,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 860 flow [2024-05-12 13:06:18,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 768 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:18,841 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 526 flow [2024-05-12 13:06:18,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-05-12 13:06:18,842 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-05-12 13:06:18,842 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 526 flow [2024-05-12 13:06:18,842 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 13:06:18,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:18,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:06:18,842 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:18,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 334957689, now seen corresponding path program 1 times [2024-05-12 13:06:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:18,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047700470] [2024-05-12 13:06:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:19,685 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 13:06:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047700470] [2024-05-12 13:06:19,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047700470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:19,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:06:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926777587] [2024-05-12 13:06:19,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:19,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:06:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:06:19,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:06:19,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:06:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 526 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 13:06:19,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:19,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:06:19,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:20,364 INFO L124 PetriNetUnfolderBase]: 3279/5837 cut-off events. [2024-05-12 13:06:20,364 INFO L125 PetriNetUnfolderBase]: For 35366/35382 co-relation queries the response was YES. [2024-05-12 13:06:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20186 conditions, 5837 events. 3279/5837 cut-off events. For 35366/35382 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 40684 event pairs, 1483 based on Foata normal form. 5/5660 useless extension candidates. Maximal degree in co-relation 20153. Up to 4730 conditions per place. [2024-05-12 13:06:20,389 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 76 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-05-12 13:06:20,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 108 transitions, 773 flow [2024-05-12 13:06:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:06:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:06:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-05-12 13:06:20,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-05-12 13:06:20,391 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 526 flow. Second operand 5 states and 132 transitions. [2024-05-12 13:06:20,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 108 transitions, 773 flow [2024-05-12 13:06:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 108 transitions, 705 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:20,405 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 546 flow [2024-05-12 13:06:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-05-12 13:06:20,406 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-05-12 13:06:20,406 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 546 flow [2024-05-12 13:06:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 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 13:06:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:06:20,406 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 13:06:20,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1693521946, now seen corresponding path program 1 times [2024-05-12 13:06:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77745687] [2024-05-12 13:06:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:21,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77745687] [2024-05-12 13:06:21,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77745687] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:21,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:21,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087225916] [2024-05-12 13:06:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 546 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 13:06:21,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:21,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:21,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:22,405 INFO L124 PetriNetUnfolderBase]: 4394/7146 cut-off events. [2024-05-12 13:06:22,406 INFO L125 PetriNetUnfolderBase]: For 46133/46133 co-relation queries the response was YES. [2024-05-12 13:06:22,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26358 conditions, 7146 events. 4394/7146 cut-off events. For 46133/46133 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45262 event pairs, 1633 based on Foata normal form. 2/6906 useless extension candidates. Maximal degree in co-relation 26323. Up to 6204 conditions per place. [2024-05-12 13:06:22,445 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 115 selfloop transitions, 20 changer transitions 0/145 dead transitions. [2024-05-12 13:06:22,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 145 transitions, 972 flow [2024-05-12 13:06:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:22,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 13:06:22,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-05-12 13:06:22,446 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 546 flow. Second operand 8 states and 203 transitions. [2024-05-12 13:06:22,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 145 transitions, 972 flow [2024-05-12 13:06:22,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 145 transitions, 949 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 13:06:22,466 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 613 flow [2024-05-12 13:06:22,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2024-05-12 13:06:22,467 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-05-12 13:06:22,467 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 613 flow [2024-05-12 13:06:22,467 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 13:06:22,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:22,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:06:22,468 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 13:06:22,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -487229484, now seen corresponding path program 2 times [2024-05-12 13:06:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:22,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452957268] [2024-05-12 13:06:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:23,390 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 13:06:23,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452957268] [2024-05-12 13:06:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452957268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715617570] [2024-05-12 13:06:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:23,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:23,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:23,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 613 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 13:06:23,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:23,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:23,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:24,566 INFO L124 PetriNetUnfolderBase]: 4445/7094 cut-off events. [2024-05-12 13:06:24,566 INFO L125 PetriNetUnfolderBase]: For 54139/54145 co-relation queries the response was YES. [2024-05-12 13:06:24,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27782 conditions, 7094 events. 4445/7094 cut-off events. For 54139/54145 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 43853 event pairs, 1559 based on Foata normal form. 6/6892 useless extension candidates. Maximal degree in co-relation 27745. Up to 6049 conditions per place. [2024-05-12 13:06:24,608 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 100 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2024-05-12 13:06:24,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 156 transitions, 1279 flow [2024-05-12 13:06:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:06:24,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:06:24,611 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 613 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:06:24,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 156 transitions, 1279 flow [2024-05-12 13:06:24,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1213 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:24,639 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 779 flow [2024-05-12 13:06:24,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=779, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-05-12 13:06:24,639 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-05-12 13:06:24,639 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 779 flow [2024-05-12 13:06:24,640 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 13:06:24,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:24,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:24,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:06:24,640 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 13:06:24,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:24,640 INFO L85 PathProgramCache]: Analyzing trace with hash -487229267, now seen corresponding path program 1 times [2024-05-12 13:06:24,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303546604] [2024-05-12 13:06:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:24,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:25,558 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 13:06:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303546604] [2024-05-12 13:06:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303546604] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:25,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011791977] [2024-05-12 13:06:25,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:25,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:25,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:25,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 779 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 13:06:25,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:25,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:25,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:26,765 INFO L124 PetriNetUnfolderBase]: 4491/7180 cut-off events. [2024-05-12 13:06:26,765 INFO L125 PetriNetUnfolderBase]: For 63390/63396 co-relation queries the response was YES. [2024-05-12 13:06:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29251 conditions, 7180 events. 4491/7180 cut-off events. For 63390/63396 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 44562 event pairs, 1441 based on Foata normal form. 5/6969 useless extension candidates. Maximal degree in co-relation 29213. Up to 6142 conditions per place. [2024-05-12 13:06:26,800 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 119 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2024-05-12 13:06:26,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 163 transitions, 1349 flow [2024-05-12 13:06:26,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:06:26,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:06:26,801 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 779 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:06:26,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 163 transitions, 1349 flow [2024-05-12 13:06:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 163 transitions, 1285 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:26,831 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 869 flow [2024-05-12 13:06:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=869, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-05-12 13:06:26,832 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-05-12 13:06:26,832 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 869 flow [2024-05-12 13:06:26,832 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 13:06:26,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:26,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:06:26,832 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:26,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash -493205892, now seen corresponding path program 3 times [2024-05-12 13:06:26,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:26,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978860862] [2024-05-12 13:06:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:26,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:27,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:27,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978860862] [2024-05-12 13:06:27,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978860862] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:27,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:27,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:27,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877436624] [2024-05-12 13:06:27,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:27,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:27,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:27,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:27,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 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 13:06:27,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:27,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:27,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:28,899 INFO L124 PetriNetUnfolderBase]: 4486/7151 cut-off events. [2024-05-12 13:06:28,899 INFO L125 PetriNetUnfolderBase]: For 69175/69178 co-relation queries the response was YES. [2024-05-12 13:06:28,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30272 conditions, 7151 events. 4486/7151 cut-off events. For 69175/69178 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 44151 event pairs, 1522 based on Foata normal form. 4/6947 useless extension candidates. Maximal degree in co-relation 30232. Up to 6108 conditions per place. [2024-05-12 13:06:28,941 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 105 selfloop transitions, 45 changer transitions 0/160 dead transitions. [2024-05-12 13:06:28,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 160 transitions, 1359 flow [2024-05-12 13:06:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 13:06:28,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-05-12 13:06:28,942 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 869 flow. Second operand 8 states and 210 transitions. [2024-05-12 13:06:28,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 160 transitions, 1359 flow [2024-05-12 13:06:28,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 160 transitions, 1287 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:28,977 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 895 flow [2024-05-12 13:06:28,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-05-12 13:06:28,978 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-05-12 13:06:28,978 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 895 flow [2024-05-12 13:06:28,978 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 13:06:28,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:28,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:06:28,980 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 13:06:28,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash -291036913, now seen corresponding path program 2 times [2024-05-12 13:06:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:28,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626950268] [2024-05-12 13:06:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:29,903 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 13:06:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626950268] [2024-05-12 13:06:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626950268] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:29,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336933824] [2024-05-12 13:06:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:30,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:30,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 895 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 13:06:30,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:30,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:31,094 INFO L124 PetriNetUnfolderBase]: 4532/6757 cut-off events. [2024-05-12 13:06:31,094 INFO L125 PetriNetUnfolderBase]: For 74178/74183 co-relation queries the response was YES. [2024-05-12 13:06:31,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30510 conditions, 6757 events. 4532/6757 cut-off events. For 74178/74183 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38494 event pairs, 1270 based on Foata normal form. 8/6714 useless extension candidates. Maximal degree in co-relation 30468. Up to 6174 conditions per place. [2024-05-12 13:06:31,136 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 112 selfloop transitions, 40 changer transitions 0/162 dead transitions. [2024-05-12 13:06:31,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1431 flow [2024-05-12 13:06:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:06:31,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:06:31,137 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 895 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:06:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1431 flow [2024-05-12 13:06:31,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1323 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 13:06:31,166 INFO L231 Difference]: Finished difference. Result has 106 places, 115 transitions, 917 flow [2024-05-12 13:06:31,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=917, PETRI_PLACES=106, PETRI_TRANSITIONS=115} [2024-05-12 13:06:31,167 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-05-12 13:06:31,167 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 115 transitions, 917 flow [2024-05-12 13:06:31,167 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 13:06:31,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:31,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:06:31,167 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 13:06:31,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 716231990, now seen corresponding path program 4 times [2024-05-12 13:06:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:31,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970626266] [2024-05-12 13:06:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:32,018 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 13:06:32,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:32,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970626266] [2024-05-12 13:06:32,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970626266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:32,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:32,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:32,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977038979] [2024-05-12 13:06:32,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:32,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:32,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:32,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:32,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 115 transitions, 917 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 13:06:32,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:32,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:32,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:33,163 INFO L124 PetriNetUnfolderBase]: 4555/6801 cut-off events. [2024-05-12 13:06:33,164 INFO L125 PetriNetUnfolderBase]: For 79309/79309 co-relation queries the response was YES. [2024-05-12 13:06:33,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31007 conditions, 6801 events. 4555/6801 cut-off events. For 79309/79309 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 38776 event pairs, 1383 based on Foata normal form. 2/6744 useless extension candidates. Maximal degree in co-relation 30964. Up to 6196 conditions per place. [2024-05-12 13:06:33,208 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 102 selfloop transitions, 51 changer transitions 0/163 dead transitions. [2024-05-12 13:06:33,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 163 transitions, 1461 flow [2024-05-12 13:06:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:06:33,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:06:33,209 INFO L175 Difference]: Start difference. First operand has 106 places, 115 transitions, 917 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:06:33,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 163 transitions, 1461 flow [2024-05-12 13:06:33,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 163 transitions, 1356 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:33,251 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 970 flow [2024-05-12 13:06:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-05-12 13:06:33,252 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-05-12 13:06:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 970 flow [2024-05-12 13:06:33,252 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 13:06:33,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:33,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:33,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:06:33,252 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash 708874760, now seen corresponding path program 5 times [2024-05-12 13:06:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799968526] [2024-05-12 13:06:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:34,089 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 13:06:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:34,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799968526] [2024-05-12 13:06:34,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799968526] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:34,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:34,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311486922] [2024-05-12 13:06:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:34,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:34,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 970 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 13:06:34,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:34,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:34,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:35,300 INFO L124 PetriNetUnfolderBase]: 4578/6840 cut-off events. [2024-05-12 13:06:35,301 INFO L125 PetriNetUnfolderBase]: For 83900/83900 co-relation queries the response was YES. [2024-05-12 13:06:35,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31324 conditions, 6840 events. 4578/6840 cut-off events. For 83900/83900 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 39089 event pairs, 1381 based on Foata normal form. 2/6784 useless extension candidates. Maximal degree in co-relation 31280. Up to 6220 conditions per place. [2024-05-12 13:06:35,336 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2024-05-12 13:06:35,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 1530 flow [2024-05-12 13:06:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:06:35,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-05-12 13:06:35,337 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 970 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:06:35,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 1530 flow [2024-05-12 13:06:35,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 166 transitions, 1406 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:35,381 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1012 flow [2024-05-12 13:06:35,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1012, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-05-12 13:06:35,382 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-05-12 13:06:35,382 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1012 flow [2024-05-12 13:06:35,382 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 13:06:35,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:35,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:35,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:06:35,382 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:35,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -286546655, now seen corresponding path program 3 times [2024-05-12 13:06:35,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:35,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105740449] [2024-05-12 13:06:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:36,241 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 13:06:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105740449] [2024-05-12 13:06:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105740449] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415598102] [2024-05-12 13:06:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:36,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:36,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1012 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 13:06:36,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:36,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:37,425 INFO L124 PetriNetUnfolderBase]: 4624/6924 cut-off events. [2024-05-12 13:06:37,425 INFO L125 PetriNetUnfolderBase]: For 89925/89930 co-relation queries the response was YES. [2024-05-12 13:06:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31772 conditions, 6924 events. 4624/6924 cut-off events. For 89925/89930 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 39852 event pairs, 1275 based on Foata normal form. 8/6873 useless extension candidates. Maximal degree in co-relation 31727. Up to 6277 conditions per place. [2024-05-12 13:06:37,470 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 121 selfloop transitions, 41 changer transitions 0/172 dead transitions. [2024-05-12 13:06:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1573 flow [2024-05-12 13:06:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 13:06:37,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-05-12 13:06:37,472 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1012 flow. Second operand 8 states and 207 transitions. [2024-05-12 13:06:37,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1573 flow [2024-05-12 13:06:37,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 1426 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:37,528 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 988 flow [2024-05-12 13:06:37,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2024-05-12 13:06:37,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 13:06:37,528 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 988 flow [2024-05-12 13:06:37,529 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 13:06:37,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:37,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:37,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:06:37,529 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:37,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash 708880557, now seen corresponding path program 4 times [2024-05-12 13:06:37,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:37,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146089013] [2024-05-12 13:06:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146089013] [2024-05-12 13:06:38,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146089013] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:38,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:38,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207489193] [2024-05-12 13:06:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:38,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:38,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:38,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:38,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 988 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 13:06:38,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:38,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:38,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:39,676 INFO L124 PetriNetUnfolderBase]: 4614/6900 cut-off events. [2024-05-12 13:06:39,677 INFO L125 PetriNetUnfolderBase]: For 93897/93902 co-relation queries the response was YES. [2024-05-12 13:06:39,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31779 conditions, 6900 events. 4614/6900 cut-off events. For 93897/93902 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39523 event pairs, 1273 based on Foata normal form. 8/6853 useless extension candidates. Maximal degree in co-relation 31733. Up to 6269 conditions per place. [2024-05-12 13:06:39,721 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 120 selfloop transitions, 40 changer transitions 0/170 dead transitions. [2024-05-12 13:06:39,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1422 flow [2024-05-12 13:06:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 13:06:39,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-05-12 13:06:39,723 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 988 flow. Second operand 8 states and 206 transitions. [2024-05-12 13:06:39,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1422 flow [2024-05-12 13:06:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1326 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:39,779 INFO L231 Difference]: Finished difference. Result has 117 places, 124 transitions, 980 flow [2024-05-12 13:06:39,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=117, PETRI_TRANSITIONS=124} [2024-05-12 13:06:39,779 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-05-12 13:06:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 124 transitions, 980 flow [2024-05-12 13:06:39,780 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 13:06:39,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:39,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:39,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:06:39,780 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:39,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash 708880340, now seen corresponding path program 6 times [2024-05-12 13:06:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:39,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473249585] [2024-05-12 13:06:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473249585] [2024-05-12 13:06:40,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473249585] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:40,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:40,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197203005] [2024-05-12 13:06:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:40,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:40,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 124 transitions, 980 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 13:06:40,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:40,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:40,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:41,781 INFO L124 PetriNetUnfolderBase]: 4609/6897 cut-off events. [2024-05-12 13:06:41,781 INFO L125 PetriNetUnfolderBase]: For 97787/97787 co-relation queries the response was YES. [2024-05-12 13:06:41,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31807 conditions, 6897 events. 4609/6897 cut-off events. For 97787/97787 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 39571 event pairs, 1380 based on Foata normal form. 2/6839 useless extension candidates. Maximal degree in co-relation 31760. Up to 6265 conditions per place. [2024-05-12 13:06:41,827 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 106 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-05-12 13:06:41,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1402 flow [2024-05-12 13:06:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 13:06:41,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-05-12 13:06:41,828 INFO L175 Difference]: Start difference. First operand has 117 places, 124 transitions, 980 flow. Second operand 8 states and 205 transitions. [2024-05-12 13:06:41,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1402 flow [2024-05-12 13:06:41,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 167 transitions, 1243 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-05-12 13:06:41,888 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 931 flow [2024-05-12 13:06:41,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-05-12 13:06:41,888 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-05-12 13:06:41,888 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 931 flow [2024-05-12 13:06:41,889 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 13:06:41,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:41,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:41,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:06:41,889 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:41,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1793755188, now seen corresponding path program 1 times [2024-05-12 13:06:41,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:41,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699054644] [2024-05-12 13:06:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:41,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:42,949 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 13:06:42,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699054644] [2024-05-12 13:06:42,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699054644] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:42,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:42,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:06:42,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558744622] [2024-05-12 13:06:42,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:42,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:06:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:06:42,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:06:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-05-12 13:06:43,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 931 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:43,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:43,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-05-12 13:06:43,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:43,750 INFO L124 PetriNetUnfolderBase]: 3473/5929 cut-off events. [2024-05-12 13:06:43,751 INFO L125 PetriNetUnfolderBase]: For 86900/86941 co-relation queries the response was YES. [2024-05-12 13:06:43,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25777 conditions, 5929 events. 3473/5929 cut-off events. For 86900/86941 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 39753 event pairs, 1455 based on Foata normal form. 12/5821 useless extension candidates. Maximal degree in co-relation 25729. Up to 4919 conditions per place. [2024-05-12 13:06:43,793 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 101 selfloop transitions, 12 changer transitions 0/146 dead transitions. [2024-05-12 13:06:43,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 146 transitions, 1227 flow [2024-05-12 13:06:43,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:06:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:06:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-05-12 13:06:43,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:06:43,794 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 931 flow. Second operand 6 states and 156 transitions. [2024-05-12 13:06:43,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 146 transitions, 1227 flow [2024-05-12 13:06:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 146 transitions, 1089 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 13:06:43,844 INFO L231 Difference]: Finished difference. Result has 114 places, 127 transitions, 853 flow [2024-05-12 13:06:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=853, PETRI_PLACES=114, PETRI_TRANSITIONS=127} [2024-05-12 13:06:43,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-05-12 13:06:43,845 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 127 transitions, 853 flow [2024-05-12 13:06:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:06:43,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:43,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:06:43,846 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 13:06:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1073256431, now seen corresponding path program 1 times [2024-05-12 13:06:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093236585] [2024-05-12 13:06:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:43,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:44,806 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 13:06:44,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093236585] [2024-05-12 13:06:44,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093236585] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:44,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:44,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182235916] [2024-05-12 13:06:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:44,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:44,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 127 transitions, 853 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 13:06:44,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:44,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:44,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:45,957 INFO L124 PetriNetUnfolderBase]: 4452/7326 cut-off events. [2024-05-12 13:06:45,958 INFO L125 PetriNetUnfolderBase]: For 111425/111439 co-relation queries the response was YES. [2024-05-12 13:06:45,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32543 conditions, 7326 events. 4452/7326 cut-off events. For 111425/111439 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 47274 event pairs, 1078 based on Foata normal form. 6/7095 useless extension candidates. Maximal degree in co-relation 32494. Up to 6140 conditions per place. [2024-05-12 13:06:46,007 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 147 selfloop transitions, 23 changer transitions 0/191 dead transitions. [2024-05-12 13:06:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 191 transitions, 1517 flow [2024-05-12 13:06:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:06:46,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:06:46,009 INFO L175 Difference]: Start difference. First operand has 114 places, 127 transitions, 853 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:06:46,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 191 transitions, 1517 flow [2024-05-12 13:06:46,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 191 transitions, 1479 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 13:06:46,050 INFO L231 Difference]: Finished difference. Result has 119 places, 131 transitions, 948 flow [2024-05-12 13:06:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=119, PETRI_TRANSITIONS=131} [2024-05-12 13:06:46,051 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-05-12 13:06:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 131 transitions, 948 flow [2024-05-12 13:06:46,051 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 13:06:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:46,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:06:46,051 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 13:06:46,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1960286853, now seen corresponding path program 2 times [2024-05-12 13:06:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:46,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473290131] [2024-05-12 13:06:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:46,973 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 13:06:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473290131] [2024-05-12 13:06:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473290131] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:46,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:46,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414957335] [2024-05-12 13:06:46,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:47,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:47,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 131 transitions, 948 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 13:06:47,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:47,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:47,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:48,117 INFO L124 PetriNetUnfolderBase]: 4444/7326 cut-off events. [2024-05-12 13:06:48,117 INFO L125 PetriNetUnfolderBase]: For 119134/119148 co-relation queries the response was YES. [2024-05-12 13:06:48,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33065 conditions, 7326 events. 4444/7326 cut-off events. For 119134/119148 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 47406 event pairs, 1434 based on Foata normal form. 6/7091 useless extension candidates. Maximal degree in co-relation 33015. Up to 6223 conditions per place. [2024-05-12 13:06:48,170 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 140 selfloop transitions, 19 changer transitions 0/180 dead transitions. [2024-05-12 13:06:48,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 180 transitions, 1388 flow [2024-05-12 13:06:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 13:06:48,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-05-12 13:06:48,171 INFO L175 Difference]: Start difference. First operand has 119 places, 131 transitions, 948 flow. Second operand 8 states and 210 transitions. [2024-05-12 13:06:48,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 180 transitions, 1388 flow [2024-05-12 13:06:48,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 180 transitions, 1300 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-05-12 13:06:48,235 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 905 flow [2024-05-12 13:06:48,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=905, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-05-12 13:06:48,236 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-05-12 13:06:48,238 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 905 flow [2024-05-12 13:06:48,238 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 13:06:48,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:48,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:48,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:06:48,239 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:48,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1070394511, now seen corresponding path program 1 times [2024-05-12 13:06:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:48,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886903634] [2024-05-12 13:06:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:06:49,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:49,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886903634] [2024-05-12 13:06:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886903634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:06:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105954223] [2024-05-12 13:06:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:06:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:49,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:06:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:06:49,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:49,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 905 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 13:06:49,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:49,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:50,445 INFO L124 PetriNetUnfolderBase]: 4733/7678 cut-off events. [2024-05-12 13:06:50,445 INFO L125 PetriNetUnfolderBase]: For 128121/128121 co-relation queries the response was YES. [2024-05-12 13:06:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34807 conditions, 7678 events. 4733/7678 cut-off events. For 128121/128121 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 48870 event pairs, 1499 based on Foata normal form. 4/7436 useless extension candidates. Maximal degree in co-relation 34755. Up to 6649 conditions per place. [2024-05-12 13:06:50,488 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 158 selfloop transitions, 23 changer transitions 0/191 dead transitions. [2024-05-12 13:06:50,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 1457 flow [2024-05-12 13:06:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 13:06:50,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-05-12 13:06:50,489 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 905 flow. Second operand 9 states and 228 transitions. [2024-05-12 13:06:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 1457 flow [2024-05-12 13:06:50,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1414 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-05-12 13:06:50,548 INFO L231 Difference]: Finished difference. Result has 124 places, 134 transitions, 970 flow [2024-05-12 13:06:50,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=970, PETRI_PLACES=124, PETRI_TRANSITIONS=134} [2024-05-12 13:06:50,549 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-05-12 13:06:50,549 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 134 transitions, 970 flow [2024-05-12 13:06:50,549 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 13:06:50,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:50,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:06:50,549 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 13:06:50,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash -955108301, now seen corresponding path program 3 times [2024-05-12 13:06:50,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914350882] [2024-05-12 13:06:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:50,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:51,482 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 13:06:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914350882] [2024-05-12 13:06:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914350882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:51,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:51,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:06:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140409663] [2024-05-12 13:06:51,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:51,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:06:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:06:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:06:51,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:06:51,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 134 transitions, 970 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 13:06:51,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:51,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:06:51,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:52,704 INFO L124 PetriNetUnfolderBase]: 4526/7350 cut-off events. [2024-05-12 13:06:52,704 INFO L125 PetriNetUnfolderBase]: For 138025/138042 co-relation queries the response was YES. [2024-05-12 13:06:52,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34748 conditions, 7350 events. 4526/7350 cut-off events. For 138025/138042 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 46632 event pairs, 1295 based on Foata normal form. 8/7144 useless extension candidates. Maximal degree in co-relation 34695. Up to 6249 conditions per place. [2024-05-12 13:06:52,750 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 132 selfloop transitions, 30 changer transitions 0/183 dead transitions. [2024-05-12 13:06:52,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 1456 flow [2024-05-12 13:06:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:06:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:06:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-05-12 13:06:52,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-05-12 13:06:52,752 INFO L175 Difference]: Start difference. First operand has 124 places, 134 transitions, 970 flow. Second operand 8 states and 211 transitions. [2024-05-12 13:06:52,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 1456 flow [2024-05-12 13:06:52,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 183 transitions, 1372 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-05-12 13:06:52,815 INFO L231 Difference]: Finished difference. Result has 125 places, 136 transitions, 1001 flow [2024-05-12 13:06:52,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1001, PETRI_PLACES=125, PETRI_TRANSITIONS=136} [2024-05-12 13:06:52,815 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-05-12 13:06:52,815 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 136 transitions, 1001 flow [2024-05-12 13:06:52,816 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 13:06:52,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:52,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:52,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:06:52,816 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 13:06:52,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash -954930361, now seen corresponding path program 2 times [2024-05-12 13:06:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:52,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968762776] [2024-05-12 13:06:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:53,790 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 13:06:53,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968762776] [2024-05-12 13:06:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968762776] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:53,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:06:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128014443] [2024-05-12 13:06:53,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:06:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:06:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:06:53,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:53,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 1001 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 13:06:53,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:53,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:53,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:55,227 INFO L124 PetriNetUnfolderBase]: 4928/7895 cut-off events. [2024-05-12 13:06:55,228 INFO L125 PetriNetUnfolderBase]: For 158153/158156 co-relation queries the response was YES. [2024-05-12 13:06:55,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38387 conditions, 7895 events. 4928/7895 cut-off events. For 158153/158156 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49526 event pairs, 1276 based on Foata normal form. 4/7676 useless extension candidates. Maximal degree in co-relation 38333. Up to 6272 conditions per place. [2024-05-12 13:06:55,292 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 133 selfloop transitions, 70 changer transitions 0/213 dead transitions. [2024-05-12 13:06:55,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 213 transitions, 2137 flow [2024-05-12 13:06:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 13:06:55,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-05-12 13:06:55,293 INFO L175 Difference]: Start difference. First operand has 125 places, 136 transitions, 1001 flow. Second operand 9 states and 246 transitions. [2024-05-12 13:06:55,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 213 transitions, 2137 flow [2024-05-12 13:06:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2040 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 13:06:55,374 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1282 flow [2024-05-12 13:06:55,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-05-12 13:06:55,374 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-05-12 13:06:55,375 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1282 flow [2024-05-12 13:06:55,375 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 13:06:55,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:55,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:06:55,375 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 13:06:55,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1890666805, now seen corresponding path program 3 times [2024-05-12 13:06:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427161536] [2024-05-12 13:06:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:56,330 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 13:06:56,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427161536] [2024-05-12 13:06:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427161536] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:56,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:56,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:06:56,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471799917] [2024-05-12 13:06:56,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:06:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:06:56,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:06:56,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:56,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1282 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 13:06:56,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:56,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:56,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:06:57,732 INFO L124 PetriNetUnfolderBase]: 4918/7881 cut-off events. [2024-05-12 13:06:57,733 INFO L125 PetriNetUnfolderBase]: For 167855/167858 co-relation queries the response was YES. [2024-05-12 13:06:57,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39312 conditions, 7881 events. 4918/7881 cut-off events. For 167855/167858 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49418 event pairs, 1276 based on Foata normal form. 4/7662 useless extension candidates. Maximal degree in co-relation 39257. Up to 6264 conditions per place. [2024-05-12 13:06:57,789 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 128 selfloop transitions, 72 changer transitions 0/210 dead transitions. [2024-05-12 13:06:57,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 210 transitions, 2074 flow [2024-05-12 13:06:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:06:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:06:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 13:06:57,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2024-05-12 13:06:57,791 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1282 flow. Second operand 9 states and 242 transitions. [2024-05-12 13:06:57,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 210 transitions, 2074 flow [2024-05-12 13:06:57,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 1946 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-05-12 13:06:57,886 INFO L231 Difference]: Finished difference. Result has 134 places, 148 transitions, 1306 flow [2024-05-12 13:06:57,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1306, PETRI_PLACES=134, PETRI_TRANSITIONS=148} [2024-05-12 13:06:57,887 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-05-12 13:06:57,887 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 148 transitions, 1306 flow [2024-05-12 13:06:57,887 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 13:06:57,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:06:57,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:06:57,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:06:57,887 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:06:57,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:06:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2075582983, now seen corresponding path program 4 times [2024-05-12 13:06:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:06:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192235798] [2024-05-12 13:06:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:06:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:06:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:06:58,863 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 13:06:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:06:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192235798] [2024-05-12 13:06:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192235798] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:06:58,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:06:58,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:06:58,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710973657] [2024-05-12 13:06:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:06:58,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:06:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:06:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:06:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:06:58,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:06:58,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 1306 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 13:06:58,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:06:58,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:06:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:00,257 INFO L124 PetriNetUnfolderBase]: 4908/7874 cut-off events. [2024-05-12 13:07:00,257 INFO L125 PetriNetUnfolderBase]: For 170357/170360 co-relation queries the response was YES. [2024-05-12 13:07:00,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39355 conditions, 7874 events. 4908/7874 cut-off events. For 170357/170360 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 49489 event pairs, 1272 based on Foata normal form. 4/7655 useless extension candidates. Maximal degree in co-relation 39298. Up to 6256 conditions per place. [2024-05-12 13:07:00,320 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 130 selfloop transitions, 69 changer transitions 0/209 dead transitions. [2024-05-12 13:07:00,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 209 transitions, 1978 flow [2024-05-12 13:07:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-05-12 13:07:00,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-05-12 13:07:00,322 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 1306 flow. Second operand 9 states and 243 transitions. [2024-05-12 13:07:00,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 209 transitions, 1978 flow [2024-05-12 13:07:00,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 209 transitions, 1840 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:00,433 INFO L231 Difference]: Finished difference. Result has 137 places, 148 transitions, 1314 flow [2024-05-12 13:07:00,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=137, PETRI_TRANSITIONS=148} [2024-05-12 13:07:00,434 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-05-12 13:07:00,434 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 148 transitions, 1314 flow [2024-05-12 13:07:00,434 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 13:07:00,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:00,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:00,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:07:00,434 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 13:07:00,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash -241541672, now seen corresponding path program 1 times [2024-05-12 13:07:00,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:00,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100262271] [2024-05-12 13:07:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:00,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:01,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100262271] [2024-05-12 13:07:01,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100262271] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:01,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:01,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991571949] [2024-05-12 13:07:01,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:01,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:01,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:01,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 148 transitions, 1314 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 13:07:01,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:01,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:01,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:02,065 INFO L124 PetriNetUnfolderBase]: 4276/7043 cut-off events. [2024-05-12 13:07:02,065 INFO L125 PetriNetUnfolderBase]: For 176307/176366 co-relation queries the response was YES. [2024-05-12 13:07:02,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36020 conditions, 7043 events. 4276/7043 cut-off events. For 176307/176366 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 46736 event pairs, 1585 based on Foata normal form. 10/6887 useless extension candidates. Maximal degree in co-relation 35962. Up to 6063 conditions per place. [2024-05-12 13:07:02,120 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 133 selfloop transitions, 15 changer transitions 0/180 dead transitions. [2024-05-12 13:07:02,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 1763 flow [2024-05-12 13:07:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-05-12 13:07:02,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:07:02,121 INFO L175 Difference]: Start difference. First operand has 137 places, 148 transitions, 1314 flow. Second operand 6 states and 156 transitions. [2024-05-12 13:07:02,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 1763 flow [2024-05-12 13:07:02,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1575 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-05-12 13:07:02,214 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1285 flow [2024-05-12 13:07:02,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1285, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-05-12 13:07:02,215 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-05-12 13:07:02,215 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1285 flow [2024-05-12 13:07:02,215 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 13:07:02,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:02,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:02,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:07:02,215 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 13:07:02,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash -521096747, now seen corresponding path program 4 times [2024-05-12 13:07:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:02,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350334069] [2024-05-12 13:07:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:02,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:03,078 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 13:07:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350334069] [2024-05-12 13:07:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350334069] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:03,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:03,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:07:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016730257] [2024-05-12 13:07:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:03,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:07:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:03,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:07:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:07:03,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:03,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1285 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 13:07:03,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:03,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:04,449 INFO L124 PetriNetUnfolderBase]: 4686/7607 cut-off events. [2024-05-12 13:07:04,449 INFO L125 PetriNetUnfolderBase]: For 183305/183330 co-relation queries the response was YES. [2024-05-12 13:07:04,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38731 conditions, 7607 events. 4686/7607 cut-off events. For 183305/183330 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 49065 event pairs, 1479 based on Foata normal form. 5/7407 useless extension candidates. Maximal degree in co-relation 38671. Up to 6471 conditions per place. [2024-05-12 13:07:04,501 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 146 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-05-12 13:07:04,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 202 transitions, 1811 flow [2024-05-12 13:07:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:07:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:07:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 13:07:04,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:07:04,502 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1285 flow. Second operand 8 states and 208 transitions. [2024-05-12 13:07:04,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 202 transitions, 1811 flow [2024-05-12 13:07:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 1765 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:04,581 INFO L231 Difference]: Finished difference. Result has 140 places, 159 transitions, 1370 flow [2024-05-12 13:07:04,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1370, PETRI_PLACES=140, PETRI_TRANSITIONS=159} [2024-05-12 13:07:04,582 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-05-12 13:07:04,582 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 159 transitions, 1370 flow [2024-05-12 13:07:04,582 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 13:07:04,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:04,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:07:04,582 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 13:07:04,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash -284736937, now seen corresponding path program 5 times [2024-05-12 13:07:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:04,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846058127] [2024-05-12 13:07:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:04,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846058127] [2024-05-12 13:07:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846058127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:05,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569540221] [2024-05-12 13:07:05,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:05,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:05,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:05,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:05,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 159 transitions, 1370 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 13:07:05,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:05,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:05,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:06,933 INFO L124 PetriNetUnfolderBase]: 4980/7858 cut-off events. [2024-05-12 13:07:06,934 INFO L125 PetriNetUnfolderBase]: For 198776/198776 co-relation queries the response was YES. [2024-05-12 13:07:06,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41148 conditions, 7858 events. 4980/7858 cut-off events. For 198776/198776 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 48976 event pairs, 1392 based on Foata normal form. 4/7690 useless extension candidates. Maximal degree in co-relation 41087. Up to 6329 conditions per place. [2024-05-12 13:07:06,989 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 120 selfloop transitions, 87 changer transitions 0/217 dead transitions. [2024-05-12 13:07:06,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 217 transitions, 2127 flow [2024-05-12 13:07:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 13:07:06,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-05-12 13:07:06,990 INFO L175 Difference]: Start difference. First operand has 140 places, 159 transitions, 1370 flow. Second operand 9 states and 234 transitions. [2024-05-12 13:07:06,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 217 transitions, 2127 flow [2024-05-12 13:07:07,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 217 transitions, 2014 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:07,101 INFO L231 Difference]: Finished difference. Result has 143 places, 162 transitions, 1504 flow [2024-05-12 13:07:07,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=143, PETRI_TRANSITIONS=162} [2024-05-12 13:07:07,102 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-05-12 13:07:07,102 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 162 transitions, 1504 flow [2024-05-12 13:07:07,102 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 13:07:07,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:07,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:07,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:07:07,102 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 13:07:07,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash -293017657, now seen corresponding path program 6 times [2024-05-12 13:07:07,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:07,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663833866] [2024-05-12 13:07:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:07,996 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 13:07:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663833866] [2024-05-12 13:07:07,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663833866] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:07,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:07,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782504806] [2024-05-12 13:07:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:08,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 162 transitions, 1504 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 13:07:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:09,572 INFO L124 PetriNetUnfolderBase]: 5082/8096 cut-off events. [2024-05-12 13:07:09,572 INFO L125 PetriNetUnfolderBase]: For 214936/214936 co-relation queries the response was YES. [2024-05-12 13:07:09,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43089 conditions, 8096 events. 5082/8096 cut-off events. For 214936/214936 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 51364 event pairs, 1419 based on Foata normal form. 4/7904 useless extension candidates. Maximal degree in co-relation 43027. Up to 6415 conditions per place. [2024-05-12 13:07:09,635 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 129 selfloop transitions, 87 changer transitions 0/226 dead transitions. [2024-05-12 13:07:09,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 226 transitions, 2504 flow [2024-05-12 13:07:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:07:09,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:07:09,636 INFO L175 Difference]: Start difference. First operand has 143 places, 162 transitions, 1504 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:07:09,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 226 transitions, 2504 flow [2024-05-12 13:07:09,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 226 transitions, 2270 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:09,750 INFO L231 Difference]: Finished difference. Result has 146 places, 168 transitions, 1594 flow [2024-05-12 13:07:09,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1594, PETRI_PLACES=146, PETRI_TRANSITIONS=168} [2024-05-12 13:07:09,751 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-05-12 13:07:09,751 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 168 transitions, 1594 flow [2024-05-12 13:07:09,751 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 13:07:09,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:09,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:09,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:07:09,751 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 13:07:09,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -293011147, now seen corresponding path program 7 times [2024-05-12 13:07:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115403886] [2024-05-12 13:07:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:10,692 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 13:07:10,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:10,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115403886] [2024-05-12 13:07:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115403886] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561435379] [2024-05-12 13:07:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:10,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:10,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:10,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 168 transitions, 1594 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 13:07:10,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:10,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:10,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:12,224 INFO L124 PetriNetUnfolderBase]: 5072/8022 cut-off events. [2024-05-12 13:07:12,225 INFO L125 PetriNetUnfolderBase]: For 216153/216153 co-relation queries the response was YES. [2024-05-12 13:07:12,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 8022 events. 5072/8022 cut-off events. For 216153/216153 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 50276 event pairs, 1401 based on Foata normal form. 4/7854 useless extension candidates. Maximal degree in co-relation 42435. Up to 6407 conditions per place. [2024-05-12 13:07:12,288 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 128 selfloop transitions, 86 changer transitions 0/224 dead transitions. [2024-05-12 13:07:12,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 224 transitions, 2310 flow [2024-05-12 13:07:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-05-12 13:07:12,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-05-12 13:07:12,290 INFO L175 Difference]: Start difference. First operand has 146 places, 168 transitions, 1594 flow. Second operand 9 states and 237 transitions. [2024-05-12 13:07:12,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 224 transitions, 2310 flow [2024-05-12 13:07:12,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 224 transitions, 2122 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-05-12 13:07:12,467 INFO L231 Difference]: Finished difference. Result has 150 places, 168 transitions, 1586 flow [2024-05-12 13:07:12,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1586, PETRI_PLACES=150, PETRI_TRANSITIONS=168} [2024-05-12 13:07:12,469 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-05-12 13:07:12,469 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 168 transitions, 1586 flow [2024-05-12 13:07:12,469 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 13:07:12,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:12,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:12,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:07:12,469 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 13:07:12,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -520912297, now seen corresponding path program 8 times [2024-05-12 13:07:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209046699] [2024-05-12 13:07:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:13,403 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 13:07:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:13,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209046699] [2024-05-12 13:07:13,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209046699] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:13,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:13,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:13,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962537678] [2024-05-12 13:07:13,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:13,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:13,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:13,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:13,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 168 transitions, 1586 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 13:07:13,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:13,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:13,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:14,911 INFO L124 PetriNetUnfolderBase]: 5118/8141 cut-off events. [2024-05-12 13:07:14,911 INFO L125 PetriNetUnfolderBase]: For 226599/226599 co-relation queries the response was YES. [2024-05-12 13:07:14,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42909 conditions, 8141 events. 5118/8141 cut-off events. For 226599/226599 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 51509 event pairs, 1431 based on Foata normal form. 4/7958 useless extension candidates. Maximal degree in co-relation 42845. Up to 6446 conditions per place. [2024-05-12 13:07:14,981 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 130 selfloop transitions, 87 changer transitions 0/227 dead transitions. [2024-05-12 13:07:14,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 227 transitions, 2375 flow [2024-05-12 13:07:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:07:14,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-05-12 13:07:14,982 INFO L175 Difference]: Start difference. First operand has 150 places, 168 transitions, 1586 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:07:14,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 227 transitions, 2375 flow [2024-05-12 13:07:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 227 transitions, 2189 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 13:07:15,140 INFO L231 Difference]: Finished difference. Result has 151 places, 171 transitions, 1645 flow [2024-05-12 13:07:15,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1645, PETRI_PLACES=151, PETRI_TRANSITIONS=171} [2024-05-12 13:07:15,140 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-05-12 13:07:15,140 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 171 transitions, 1645 flow [2024-05-12 13:07:15,141 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 13:07:15,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:15,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:15,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:07:15,141 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 13:07:15,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:15,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1792070089, now seen corresponding path program 9 times [2024-05-12 13:07:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194934288] [2024-05-12 13:07:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:16,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194934288] [2024-05-12 13:07:16,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194934288] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:16,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:16,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:16,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842608811] [2024-05-12 13:07:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:16,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:16,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:16,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:16,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 171 transitions, 1645 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 13:07:16,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:16,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:16,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:17,508 INFO L124 PetriNetUnfolderBase]: 5164/8214 cut-off events. [2024-05-12 13:07:17,508 INFO L125 PetriNetUnfolderBase]: For 237943/237943 co-relation queries the response was YES. [2024-05-12 13:07:17,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43601 conditions, 8214 events. 5164/8214 cut-off events. For 237943/237943 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 52023 event pairs, 1431 based on Foata normal form. 4/8031 useless extension candidates. Maximal degree in co-relation 43536. Up to 6485 conditions per place. [2024-05-12 13:07:17,577 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 132 selfloop transitions, 89 changer transitions 0/231 dead transitions. [2024-05-12 13:07:17,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2448 flow [2024-05-12 13:07:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 13:07:17,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-05-12 13:07:17,578 INFO L175 Difference]: Start difference. First operand has 151 places, 171 transitions, 1645 flow. Second operand 9 states and 240 transitions. [2024-05-12 13:07:17,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2448 flow [2024-05-12 13:07:17,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 231 transitions, 2054 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-05-12 13:07:17,733 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1500 flow [2024-05-12 13:07:17,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1500, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-05-12 13:07:17,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-05-12 13:07:17,733 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1500 flow [2024-05-12 13:07:17,734 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 13:07:17,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:17,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:17,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:07:17,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:17,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1792243069, now seen corresponding path program 10 times [2024-05-12 13:07:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725352794] [2024-05-12 13:07:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:18,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725352794] [2024-05-12 13:07:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725352794] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839494913] [2024-05-12 13:07:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:18,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:18,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1500 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 13:07:18,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:18,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:18,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:20,111 INFO L124 PetriNetUnfolderBase]: 5154/8200 cut-off events. [2024-05-12 13:07:20,112 INFO L125 PetriNetUnfolderBase]: For 236451/236451 co-relation queries the response was YES. [2024-05-12 13:07:20,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43207 conditions, 8200 events. 5154/8200 cut-off events. For 236451/236451 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 51887 event pairs, 1420 based on Foata normal form. 4/8017 useless extension candidates. Maximal degree in co-relation 43141. Up to 6477 conditions per place. [2024-05-12 13:07:20,179 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 126 selfloop transitions, 92 changer transitions 0/228 dead transitions. [2024-05-12 13:07:20,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 2078 flow [2024-05-12 13:07:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 13:07:20,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-05-12 13:07:20,185 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1500 flow. Second operand 9 states and 235 transitions. [2024-05-12 13:07:20,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 2078 flow [2024-05-12 13:07:20,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 1848 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:20,329 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 1462 flow [2024-05-12 13:07:20,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1462, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-05-12 13:07:20,330 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-05-12 13:07:20,330 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 1462 flow [2024-05-12 13:07:20,330 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 13:07:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:20,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:07:20,330 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 13:07:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 294456616, now seen corresponding path program 2 times [2024-05-12 13:07:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423233511] [2024-05-12 13:07:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:21,109 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 13:07:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423233511] [2024-05-12 13:07:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423233511] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:21,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:21,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924673482] [2024-05-12 13:07:21,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:21,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:21,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 1462 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 13:07:21,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:21,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:21,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:22,068 INFO L124 PetriNetUnfolderBase]: 4444/7302 cut-off events. [2024-05-12 13:07:22,068 INFO L125 PetriNetUnfolderBase]: For 236910/236961 co-relation queries the response was YES. [2024-05-12 13:07:22,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39209 conditions, 7302 events. 4444/7302 cut-off events. For 236910/236961 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 48486 event pairs, 1594 based on Foata normal form. 3/7099 useless extension candidates. Maximal degree in co-relation 39142. Up to 6266 conditions per place. [2024-05-12 13:07:22,131 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 144 selfloop transitions, 20 changer transitions 0/196 dead transitions. [2024-05-12 13:07:22,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 196 transitions, 1878 flow [2024-05-12 13:07:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:07:22,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:07:22,132 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 1462 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:07:22,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 196 transitions, 1878 flow [2024-05-12 13:07:22,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 1670 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-05-12 13:07:22,299 INFO L231 Difference]: Finished difference. Result has 150 places, 177 transitions, 1344 flow [2024-05-12 13:07:22,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1344, PETRI_PLACES=150, PETRI_TRANSITIONS=177} [2024-05-12 13:07:22,300 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-05-12 13:07:22,300 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 177 transitions, 1344 flow [2024-05-12 13:07:22,300 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 13:07:22,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:22,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:22,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:07:22,300 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 13:07:22,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash -235821800, now seen corresponding path program 1 times [2024-05-12 13:07:22,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:22,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689003046] [2024-05-12 13:07:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:23,034 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 13:07:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689003046] [2024-05-12 13:07:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689003046] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:23,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:23,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:23,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454578691] [2024-05-12 13:07:23,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:23,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:23,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 177 transitions, 1344 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 13:07:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:24,055 INFO L124 PetriNetUnfolderBase]: 4320/7205 cut-off events. [2024-05-12 13:07:24,055 INFO L125 PetriNetUnfolderBase]: For 212702/212728 co-relation queries the response was YES. [2024-05-12 13:07:24,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37414 conditions, 7205 events. 4320/7205 cut-off events. For 212702/212728 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 47961 event pairs, 1413 based on Foata normal form. 3/7066 useless extension candidates. Maximal degree in co-relation 37346. Up to 6115 conditions per place. [2024-05-12 13:07:24,117 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 169 selfloop transitions, 13 changer transitions 0/204 dead transitions. [2024-05-12 13:07:24,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 204 transitions, 1826 flow [2024-05-12 13:07:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:07:24,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:07:24,119 INFO L175 Difference]: Start difference. First operand has 150 places, 177 transitions, 1344 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:07:24,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 204 transitions, 1826 flow [2024-05-12 13:07:24,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 204 transitions, 1758 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:24,268 INFO L231 Difference]: Finished difference. Result has 153 places, 184 transitions, 1395 flow [2024-05-12 13:07:24,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1395, PETRI_PLACES=153, PETRI_TRANSITIONS=184} [2024-05-12 13:07:24,269 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-05-12 13:07:24,269 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 184 transitions, 1395 flow [2024-05-12 13:07:24,269 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 13:07:24,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:24,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:24,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:07:24,269 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:24,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -284429107, now seen corresponding path program 1 times [2024-05-12 13:07:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:24,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208902821] [2024-05-12 13:07:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:25,403 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 13:07:25,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:25,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208902821] [2024-05-12 13:07:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208902821] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:25,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:25,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617945515] [2024-05-12 13:07:25,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:25,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:25,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:07:25,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 184 transitions, 1395 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 13:07:25,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:25,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:07:25,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:26,765 INFO L124 PetriNetUnfolderBase]: 4549/7471 cut-off events. [2024-05-12 13:07:26,766 INFO L125 PetriNetUnfolderBase]: For 222449/222449 co-relation queries the response was YES. [2024-05-12 13:07:26,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39382 conditions, 7471 events. 4549/7471 cut-off events. For 222449/222449 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 48812 event pairs, 1383 based on Foata normal form. 4/7332 useless extension candidates. Maximal degree in co-relation 39312. Up to 6401 conditions per place. [2024-05-12 13:07:26,826 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 203 selfloop transitions, 25 changer transitions 0/239 dead transitions. [2024-05-12 13:07:26,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 239 transitions, 2057 flow [2024-05-12 13:07:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:07:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:07:26,827 INFO L175 Difference]: Start difference. First operand has 153 places, 184 transitions, 1395 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:07:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 239 transitions, 2057 flow [2024-05-12 13:07:26,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 239 transitions, 2004 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 13:07:26,968 INFO L231 Difference]: Finished difference. Result has 160 places, 189 transitions, 1477 flow [2024-05-12 13:07:26,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1477, PETRI_PLACES=160, PETRI_TRANSITIONS=189} [2024-05-12 13:07:26,969 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-05-12 13:07:26,969 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 189 transitions, 1477 flow [2024-05-12 13:07:26,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 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 13:07:26,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:26,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:07:26,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:07:26,970 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 13:07:26,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:26,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1157108020, now seen corresponding path program 2 times [2024-05-12 13:07:26,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891751846] [2024-05-12 13:07:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:26,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:27,720 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 13:07:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891751846] [2024-05-12 13:07:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891751846] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:27,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:07:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081250596] [2024-05-12 13:07:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:27,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:07:27,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:07:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:07:27,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:27,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 189 transitions, 1477 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 13:07:27,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:27,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:27,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:28,693 INFO L124 PetriNetUnfolderBase]: 4317/7348 cut-off events. [2024-05-12 13:07:28,693 INFO L125 PetriNetUnfolderBase]: For 229329/229363 co-relation queries the response was YES. [2024-05-12 13:07:28,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39162 conditions, 7348 events. 4317/7348 cut-off events. For 229329/229363 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 49959 event pairs, 1351 based on Foata normal form. 9/7173 useless extension candidates. Maximal degree in co-relation 39090. Up to 6086 conditions per place. [2024-05-12 13:07:28,758 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 171 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-05-12 13:07:28,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 211 transitions, 1955 flow [2024-05-12 13:07:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:07:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:07:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-05-12 13:07:28,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:07:28,760 INFO L175 Difference]: Start difference. First operand has 160 places, 189 transitions, 1477 flow. Second operand 6 states and 153 transitions. [2024-05-12 13:07:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 211 transitions, 1955 flow [2024-05-12 13:07:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 211 transitions, 1860 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:28,890 INFO L231 Difference]: Finished difference. Result has 160 places, 192 transitions, 1476 flow [2024-05-12 13:07:28,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1476, PETRI_PLACES=160, PETRI_TRANSITIONS=192} [2024-05-12 13:07:28,891 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-05-12 13:07:28,891 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 192 transitions, 1476 flow [2024-05-12 13:07:28,891 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 13:07:28,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:28,891 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 13:07:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:07:28,891 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:28,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1088789759, now seen corresponding path program 1 times [2024-05-12 13:07:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837866091] [2024-05-12 13:07:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:29,887 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 13:07:29,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837866091] [2024-05-12 13:07:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837866091] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:29,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:29,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475956407] [2024-05-12 13:07:29,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:29,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:29,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:29,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 192 transitions, 1476 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 13:07:29,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:29,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:31,306 INFO L124 PetriNetUnfolderBase]: 5251/8404 cut-off events. [2024-05-12 13:07:31,306 INFO L125 PetriNetUnfolderBase]: For 292276/292276 co-relation queries the response was YES. [2024-05-12 13:07:31,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46950 conditions, 8404 events. 5251/8404 cut-off events. For 292276/292276 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 54182 event pairs, 1224 based on Foata normal form. 4/8232 useless extension candidates. Maximal degree in co-relation 46877. Up to 7188 conditions per place. [2024-05-12 13:07:31,376 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 221 selfloop transitions, 33 changer transitions 0/264 dead transitions. [2024-05-12 13:07:31,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 264 transitions, 2434 flow [2024-05-12 13:07:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:07:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:07:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:07:31,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:07:31,378 INFO L175 Difference]: Start difference. First operand has 160 places, 192 transitions, 1476 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:07:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 264 transitions, 2434 flow [2024-05-12 13:07:31,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 264 transitions, 2362 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 13:07:31,572 INFO L231 Difference]: Finished difference. Result has 166 places, 196 transitions, 1581 flow [2024-05-12 13:07:31,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1581, PETRI_PLACES=166, PETRI_TRANSITIONS=196} [2024-05-12 13:07:31,573 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-05-12 13:07:31,573 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 196 transitions, 1581 flow [2024-05-12 13:07:31,573 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 13:07:31,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:31,573 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 13:07:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:07:31,573 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:31,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash -219970255, now seen corresponding path program 2 times [2024-05-12 13:07:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:31,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846943760] [2024-05-12 13:07:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:32,565 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 13:07:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846943760] [2024-05-12 13:07:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846943760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:32,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168977706] [2024-05-12 13:07:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:32,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:32,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 196 transitions, 1581 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 13:07:32,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:32,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:32,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:33,972 INFO L124 PetriNetUnfolderBase]: 5288/8391 cut-off events. [2024-05-12 13:07:33,972 INFO L125 PetriNetUnfolderBase]: For 307541/307541 co-relation queries the response was YES. [2024-05-12 13:07:34,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47985 conditions, 8391 events. 5288/8391 cut-off events. For 307541/307541 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 53590 event pairs, 1613 based on Foata normal form. 4/8236 useless extension candidates. Maximal degree in co-relation 47911. Up to 7433 conditions per place. [2024-05-12 13:07:34,046 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 217 selfloop transitions, 27 changer transitions 0/254 dead transitions. [2024-05-12 13:07:34,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 254 transitions, 2273 flow [2024-05-12 13:07:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:07:34,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:07:34,048 INFO L175 Difference]: Start difference. First operand has 166 places, 196 transitions, 1581 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:07:34,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 254 transitions, 2273 flow [2024-05-12 13:07:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 254 transitions, 2162 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-05-12 13:07:34,266 INFO L231 Difference]: Finished difference. Result has 169 places, 198 transitions, 1589 flow [2024-05-12 13:07:34,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=169, PETRI_TRANSITIONS=198} [2024-05-12 13:07:34,267 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2024-05-12 13:07:34,267 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 198 transitions, 1589 flow [2024-05-12 13:07:34,267 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 13:07:34,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:34,267 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 13:07:34,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:07:34,267 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:34,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1177355519, now seen corresponding path program 3 times [2024-05-12 13:07:34,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:34,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280414021] [2024-05-12 13:07:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:34,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:35,270 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 13:07:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280414021] [2024-05-12 13:07:35,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280414021] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:35,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:35,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069861406] [2024-05-12 13:07:35,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:35,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:35,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 198 transitions, 1589 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 13:07:35,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:35,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:35,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:36,820 INFO L124 PetriNetUnfolderBase]: 5280/8367 cut-off events. [2024-05-12 13:07:36,820 INFO L125 PetriNetUnfolderBase]: For 311811/311811 co-relation queries the response was YES. [2024-05-12 13:07:36,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47603 conditions, 8367 events. 5280/8367 cut-off events. For 311811/311811 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 53363 event pairs, 1598 based on Foata normal form. 4/8215 useless extension candidates. Maximal degree in co-relation 47527. Up to 7344 conditions per place. [2024-05-12 13:07:36,900 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 215 selfloop transitions, 30 changer transitions 0/255 dead transitions. [2024-05-12 13:07:36,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 255 transitions, 2231 flow [2024-05-12 13:07:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:07:36,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:07:36,902 INFO L175 Difference]: Start difference. First operand has 169 places, 198 transitions, 1589 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:07:36,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 255 transitions, 2231 flow [2024-05-12 13:07:37,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 255 transitions, 2124 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:37,181 INFO L231 Difference]: Finished difference. Result has 171 places, 198 transitions, 1549 flow [2024-05-12 13:07:37,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1549, PETRI_PLACES=171, PETRI_TRANSITIONS=198} [2024-05-12 13:07:37,182 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-05-12 13:07:37,182 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 198 transitions, 1549 flow [2024-05-12 13:07:37,182 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 13:07:37,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:37,182 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 13:07:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:07:37,182 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:37,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -76079725, now seen corresponding path program 4 times [2024-05-12 13:07:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578850465] [2024-05-12 13:07:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:38,172 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 13:07:38,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:38,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578850465] [2024-05-12 13:07:38,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578850465] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:38,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91890130] [2024-05-12 13:07:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:38,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:38,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 198 transitions, 1549 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 13:07:38,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:38,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:38,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:39,819 INFO L124 PetriNetUnfolderBase]: 5317/8439 cut-off events. [2024-05-12 13:07:39,819 INFO L125 PetriNetUnfolderBase]: For 323071/323074 co-relation queries the response was YES. [2024-05-12 13:07:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48033 conditions, 8439 events. 5317/8439 cut-off events. For 323071/323074 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 54017 event pairs, 1586 based on Foata normal form. 6/8284 useless extension candidates. Maximal degree in co-relation 47956. Up to 7238 conditions per place. [2024-05-12 13:07:39,880 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 184 selfloop transitions, 61 changer transitions 0/255 dead transitions. [2024-05-12 13:07:39,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 255 transitions, 2255 flow [2024-05-12 13:07:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:07:39,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:07:39,882 INFO L175 Difference]: Start difference. First operand has 171 places, 198 transitions, 1549 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:07:39,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 255 transitions, 2255 flow [2024-05-12 13:07:40,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 255 transitions, 2179 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 13:07:40,146 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 1660 flow [2024-05-12 13:07:40,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1660, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2024-05-12 13:07:40,147 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-05-12 13:07:40,147 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 1660 flow [2024-05-12 13:07:40,147 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 13:07:40,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:40,147 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 13:07:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:07:40,147 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:40,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -81442105, now seen corresponding path program 5 times [2024-05-12 13:07:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564570552] [2024-05-12 13:07:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:41,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564570552] [2024-05-12 13:07:41,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564570552] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:41,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:41,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:41,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242496678] [2024-05-12 13:07:41,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:41,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:41,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:41,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:41,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 1660 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 13:07:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:42,700 INFO L124 PetriNetUnfolderBase]: 5354/8503 cut-off events. [2024-05-12 13:07:42,700 INFO L125 PetriNetUnfolderBase]: For 339745/339748 co-relation queries the response was YES. [2024-05-12 13:07:42,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49250 conditions, 8503 events. 5354/8503 cut-off events. For 339745/339748 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 54525 event pairs, 1601 based on Foata normal form. 6/8346 useless extension candidates. Maximal degree in co-relation 49172. Up to 7293 conditions per place. [2024-05-12 13:07:42,770 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 187 selfloop transitions, 60 changer transitions 0/257 dead transitions. [2024-05-12 13:07:42,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 257 transitions, 2374 flow [2024-05-12 13:07:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 13:07:42,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2024-05-12 13:07:42,772 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 1660 flow. Second operand 9 states and 232 transitions. [2024-05-12 13:07:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 257 transitions, 2374 flow [2024-05-12 13:07:43,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 257 transitions, 2205 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:43,016 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 1680 flow [2024-05-12 13:07:43,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1680, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2024-05-12 13:07:43,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-05-12 13:07:43,017 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 1680 flow [2024-05-12 13:07:43,017 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 13:07:43,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:43,017 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 13:07:43,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:07:43,017 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:43,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash -81589975, now seen corresponding path program 6 times [2024-05-12 13:07:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463369026] [2024-05-12 13:07:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:44,031 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 13:07:44,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:44,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463369026] [2024-05-12 13:07:44,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463369026] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:44,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:44,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:44,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122025446] [2024-05-12 13:07:44,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:44,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:44,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:44,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:44,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 1680 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 13:07:44,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:44,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:44,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:45,545 INFO L124 PetriNetUnfolderBase]: 5391/8538 cut-off events. [2024-05-12 13:07:45,545 INFO L125 PetriNetUnfolderBase]: For 354436/354439 co-relation queries the response was YES. [2024-05-12 13:07:45,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50003 conditions, 8538 events. 5391/8538 cut-off events. For 354436/354439 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 54442 event pairs, 1586 based on Foata normal form. 6/8387 useless extension candidates. Maximal degree in co-relation 49924. Up to 7237 conditions per place. [2024-05-12 13:07:45,621 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 185 selfloop transitions, 65 changer transitions 0/260 dead transitions. [2024-05-12 13:07:45,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 260 transitions, 2406 flow [2024-05-12 13:07:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:45,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 13:07:45,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-05-12 13:07:45,622 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 1680 flow. Second operand 9 states and 233 transitions. [2024-05-12 13:07:45,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 260 transitions, 2406 flow [2024-05-12 13:07:45,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 260 transitions, 2235 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:45,918 INFO L231 Difference]: Finished difference. Result has 176 places, 204 transitions, 1712 flow [2024-05-12 13:07:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=176, PETRI_TRANSITIONS=204} [2024-05-12 13:07:45,918 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-05-12 13:07:45,918 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 204 transitions, 1712 flow [2024-05-12 13:07:45,919 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 13:07:45,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:45,919 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 13:07:45,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:07:45,919 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 13:07:45,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1102144181, now seen corresponding path program 1 times [2024-05-12 13:07:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:45,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538798237] [2024-05-12 13:07:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:45,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:46,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538798237] [2024-05-12 13:07:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538798237] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:46,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:46,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:07:46,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681274029] [2024-05-12 13:07:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:46,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:07:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:07:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:07:47,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:07:47,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 204 transitions, 1712 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:07:47,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:47,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:07:47,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:48,115 INFO L124 PetriNetUnfolderBase]: 4657/7685 cut-off events. [2024-05-12 13:07:48,115 INFO L125 PetriNetUnfolderBase]: For 354871/354895 co-relation queries the response was YES. [2024-05-12 13:07:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45725 conditions, 7685 events. 4657/7685 cut-off events. For 354871/354895 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 51591 event pairs, 1548 based on Foata normal form. 8/7472 useless extension candidates. Maximal degree in co-relation 45645. Up to 6525 conditions per place. [2024-05-12 13:07:48,196 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 179 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2024-05-12 13:07:48,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 2220 flow [2024-05-12 13:07:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:07:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:07:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-05-12 13:07:48,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2024-05-12 13:07:48,197 INFO L175 Difference]: Start difference. First operand has 176 places, 204 transitions, 1712 flow. Second operand 7 states and 179 transitions. [2024-05-12 13:07:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 2220 flow [2024-05-12 13:07:48,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 235 transitions, 2035 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:48,464 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 1613 flow [2024-05-12 13:07:48,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1613, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2024-05-12 13:07:48,465 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-05-12 13:07:48,465 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 1613 flow [2024-05-12 13:07:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:07:48,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:48,465 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 13:07:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:07:48,466 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:48,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 275034571, now seen corresponding path program 7 times [2024-05-12 13:07:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:48,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57902290] [2024-05-12 13:07:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:07:49,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57902290] [2024-05-12 13:07:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57902290] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:49,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:49,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:49,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406022412] [2024-05-12 13:07:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:49,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 1613 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 13:07:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:49,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:49,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:51,129 INFO L124 PetriNetUnfolderBase]: 5462/8651 cut-off events. [2024-05-12 13:07:51,129 INFO L125 PetriNetUnfolderBase]: For 377485/377485 co-relation queries the response was YES. [2024-05-12 13:07:51,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51384 conditions, 8651 events. 5462/8651 cut-off events. For 377485/377485 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 55370 event pairs, 1607 based on Foata normal form. 4/8493 useless extension candidates. Maximal degree in co-relation 51303. Up to 7449 conditions per place. [2024-05-12 13:07:51,221 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 189 selfloop transitions, 61 changer transitions 0/260 dead transitions. [2024-05-12 13:07:51,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 260 transitions, 2325 flow [2024-05-12 13:07:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 13:07:51,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-05-12 13:07:51,222 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 1613 flow. Second operand 9 states and 228 transitions. [2024-05-12 13:07:51,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 260 transitions, 2325 flow [2024-05-12 13:07:51,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 260 transitions, 2261 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:07:51,544 INFO L231 Difference]: Finished difference. Result has 180 places, 209 transitions, 1748 flow [2024-05-12 13:07:51,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1748, PETRI_PLACES=180, PETRI_TRANSITIONS=209} [2024-05-12 13:07:51,545 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2024-05-12 13:07:51,545 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 209 transitions, 1748 flow [2024-05-12 13:07:51,545 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 13:07:51,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:51,545 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 13:07:51,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:07:51,545 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 13:07:51,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash 474336361, now seen corresponding path program 8 times [2024-05-12 13:07:51,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:51,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083997427] [2024-05-12 13:07:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:51,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:52,531 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 13:07:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083997427] [2024-05-12 13:07:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083997427] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:52,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881236484] [2024-05-12 13:07:52,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:52,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 209 transitions, 1748 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 13:07:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:54,230 INFO L124 PetriNetUnfolderBase]: 5499/8722 cut-off events. [2024-05-12 13:07:54,230 INFO L125 PetriNetUnfolderBase]: For 396855/396855 co-relation queries the response was YES. [2024-05-12 13:07:54,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52729 conditions, 8722 events. 5499/8722 cut-off events. For 396855/396855 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 55987 event pairs, 1616 based on Foata normal form. 4/8559 useless extension candidates. Maximal degree in co-relation 52647. Up to 7504 conditions per place. [2024-05-12 13:07:54,315 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 189 selfloop transitions, 63 changer transitions 0/262 dead transitions. [2024-05-12 13:07:54,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 262 transitions, 2468 flow [2024-05-12 13:07:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 13:07:54,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2024-05-12 13:07:54,316 INFO L175 Difference]: Start difference. First operand has 180 places, 209 transitions, 1748 flow. Second operand 9 states and 227 transitions. [2024-05-12 13:07:54,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 262 transitions, 2468 flow [2024-05-12 13:07:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 262 transitions, 2287 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:54,645 INFO L231 Difference]: Finished difference. Result has 182 places, 211 transitions, 1774 flow [2024-05-12 13:07:54,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1774, PETRI_PLACES=182, PETRI_TRANSITIONS=211} [2024-05-12 13:07:54,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-05-12 13:07:54,646 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 211 transitions, 1774 flow [2024-05-12 13:07:54,646 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 13:07:54,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:54,646 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 13:07:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:07:54,646 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1671284439, now seen corresponding path program 9 times [2024-05-12 13:07:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307926946] [2024-05-12 13:07:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:55,646 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 13:07:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:55,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307926946] [2024-05-12 13:07:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307926946] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:55,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:55,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938158907] [2024-05-12 13:07:55,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:55,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:55,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:55,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 211 transitions, 1774 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 13:07:55,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:55,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:55,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:07:57,333 INFO L124 PetriNetUnfolderBase]: 5536/8752 cut-off events. [2024-05-12 13:07:57,333 INFO L125 PetriNetUnfolderBase]: For 413158/413158 co-relation queries the response was YES. [2024-05-12 13:07:57,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53504 conditions, 8752 events. 5536/8752 cut-off events. For 413158/413158 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 55929 event pairs, 1604 based on Foata normal form. 4/8595 useless extension candidates. Maximal degree in co-relation 53421. Up to 7408 conditions per place. [2024-05-12 13:07:57,405 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 191 selfloop transitions, 68 changer transitions 0/269 dead transitions. [2024-05-12 13:07:57,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 269 transitions, 2794 flow [2024-05-12 13:07:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:07:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:07:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 13:07:57,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-05-12 13:07:57,406 INFO L175 Difference]: Start difference. First operand has 182 places, 211 transitions, 1774 flow. Second operand 9 states and 231 transitions. [2024-05-12 13:07:57,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 269 transitions, 2794 flow [2024-05-12 13:07:57,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 269 transitions, 2605 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-05-12 13:07:57,724 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 1880 flow [2024-05-12 13:07:57,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1880, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-05-12 13:07:57,725 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-05-12 13:07:57,725 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 1880 flow [2024-05-12 13:07:57,725 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 13:07:57,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:07:57,726 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 13:07:57,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:07:57,726 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:07:57,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:07:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1665774189, now seen corresponding path program 10 times [2024-05-12 13:07:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:07:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124548970] [2024-05-12 13:07:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:07:57,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:07:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:07:58,720 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 13:07:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:07:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124548970] [2024-05-12 13:07:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124548970] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:07:58,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:07:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:07:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625977047] [2024-05-12 13:07:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:07:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:07:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:07:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:07:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:07:58,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:07:58,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 1880 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 13:07:58,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:07:58,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:07:58,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:00,435 INFO L124 PetriNetUnfolderBase]: 5528/8763 cut-off events. [2024-05-12 13:08:00,435 INFO L125 PetriNetUnfolderBase]: For 420609/420609 co-relation queries the response was YES. [2024-05-12 13:08:00,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53416 conditions, 8763 events. 5528/8763 cut-off events. For 420609/420609 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 56271 event pairs, 1620 based on Foata normal form. 4/8601 useless extension candidates. Maximal degree in co-relation 53332. Up to 7547 conditions per place. [2024-05-12 13:08:00,513 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 196 selfloop transitions, 60 changer transitions 0/266 dead transitions. [2024-05-12 13:08:00,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 266 transitions, 2538 flow [2024-05-12 13:08:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:08:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:08:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 13:08:00,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 13:08:00,514 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 1880 flow. Second operand 9 states and 229 transitions. [2024-05-12 13:08:00,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 266 transitions, 2538 flow [2024-05-12 13:08:00,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 266 transitions, 2337 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:00,922 INFO L231 Difference]: Finished difference. Result has 188 places, 215 transitions, 1806 flow [2024-05-12 13:08:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1806, PETRI_PLACES=188, PETRI_TRANSITIONS=215} [2024-05-12 13:08:00,923 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-05-12 13:08:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 215 transitions, 1806 flow [2024-05-12 13:08:00,923 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 13:08:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:00,923 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 13:08:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:08:00,924 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 13:08:00,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1516373621, now seen corresponding path program 2 times [2024-05-12 13:08:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:00,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734579577] [2024-05-12 13:08:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:01,974 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 13:08:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734579577] [2024-05-12 13:08:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734579577] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:01,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941326322] [2024-05-12 13:08:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:02,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:02,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 215 transitions, 1806 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:02,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:02,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:02,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:03,271 INFO L124 PetriNetUnfolderBase]: 4751/8027 cut-off events. [2024-05-12 13:08:03,271 INFO L125 PetriNetUnfolderBase]: For 408464/408503 co-relation queries the response was YES. [2024-05-12 13:08:03,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48026 conditions, 8027 events. 4751/8027 cut-off events. For 408464/408503 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55671 event pairs, 1562 based on Foata normal form. 17/7767 useless extension candidates. Maximal degree in co-relation 47940. Up to 6642 conditions per place. [2024-05-12 13:08:03,351 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 177 selfloop transitions, 23 changer transitions 0/242 dead transitions. [2024-05-12 13:08:03,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 242 transitions, 2320 flow [2024-05-12 13:08:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:08:03,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:08:03,352 INFO L175 Difference]: Start difference. First operand has 188 places, 215 transitions, 1806 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:08:03,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 242 transitions, 2320 flow [2024-05-12 13:08:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 242 transitions, 2181 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-05-12 13:08:03,664 INFO L231 Difference]: Finished difference. Result has 187 places, 218 transitions, 1769 flow [2024-05-12 13:08:03,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1769, PETRI_PLACES=187, PETRI_TRANSITIONS=218} [2024-05-12 13:08:03,665 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 131 predicate places. [2024-05-12 13:08:03,665 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 218 transitions, 1769 flow [2024-05-12 13:08:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:03,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:03,665 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 13:08:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:08:03,666 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 13:08:03,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1516878611, now seen corresponding path program 3 times [2024-05-12 13:08:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960886561] [2024-05-12 13:08:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:04,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:04,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960886561] [2024-05-12 13:08:04,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960886561] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:04,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:04,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:04,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741217879] [2024-05-12 13:08:04,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:04,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:04,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:04,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:04,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 218 transitions, 1769 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:04,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:04,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:05,909 INFO L124 PetriNetUnfolderBase]: 4753/8025 cut-off events. [2024-05-12 13:08:05,910 INFO L125 PetriNetUnfolderBase]: For 420683/420714 co-relation queries the response was YES. [2024-05-12 13:08:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48644 conditions, 8025 events. 4753/8025 cut-off events. For 420683/420714 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 55556 event pairs, 1561 based on Foata normal form. 21/7771 useless extension candidates. Maximal degree in co-relation 48557. Up to 6601 conditions per place. [2024-05-12 13:08:06,003 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 175 selfloop transitions, 31 changer transitions 0/248 dead transitions. [2024-05-12 13:08:06,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 248 transitions, 2315 flow [2024-05-12 13:08:06,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:08:06,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:08:06,004 INFO L175 Difference]: Start difference. First operand has 187 places, 218 transitions, 1769 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:08:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 248 transitions, 2315 flow [2024-05-12 13:08:06,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 248 transitions, 2235 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:06,451 INFO L231 Difference]: Finished difference. Result has 190 places, 224 transitions, 1843 flow [2024-05-12 13:08:06,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1843, PETRI_PLACES=190, PETRI_TRANSITIONS=224} [2024-05-12 13:08:06,451 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 134 predicate places. [2024-05-12 13:08:06,451 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 224 transitions, 1843 flow [2024-05-12 13:08:06,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:06,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:06,452 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 13:08:06,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:08:06,452 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 13:08:06,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1501407184, now seen corresponding path program 1 times [2024-05-12 13:08:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:06,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621092394] [2024-05-12 13:08:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:07,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621092394] [2024-05-12 13:08:07,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621092394] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:07,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045645334] [2024-05-12 13:08:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:07,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:07,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:07,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 224 transitions, 1843 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 13:08:07,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:07,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:07,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:08,655 INFO L124 PetriNetUnfolderBase]: 5173/8424 cut-off events. [2024-05-12 13:08:08,656 INFO L125 PetriNetUnfolderBase]: For 446559/446575 co-relation queries the response was YES. [2024-05-12 13:08:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53025 conditions, 8424 events. 5173/8424 cut-off events. For 446559/446575 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 55788 event pairs, 1499 based on Foata normal form. 1/8256 useless extension candidates. Maximal degree in co-relation 52936. Up to 7299 conditions per place. [2024-05-12 13:08:08,745 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 225 selfloop transitions, 17 changer transitions 0/257 dead transitions. [2024-05-12 13:08:08,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 2482 flow [2024-05-12 13:08:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:08,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:08,746 INFO L175 Difference]: Start difference. First operand has 190 places, 224 transitions, 1843 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:08,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 2482 flow [2024-05-12 13:08:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 257 transitions, 2415 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:09,122 INFO L231 Difference]: Finished difference. Result has 195 places, 231 transitions, 1924 flow [2024-05-12 13:08:09,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=195, PETRI_TRANSITIONS=231} [2024-05-12 13:08:09,123 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 139 predicate places. [2024-05-12 13:08:09,123 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 231 transitions, 1924 flow [2024-05-12 13:08:09,123 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 13:08:09,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:09,123 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 13:08:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:08:09,124 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 13:08:09,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1501414903, now seen corresponding path program 1 times [2024-05-12 13:08:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288644645] [2024-05-12 13:08:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:10,184 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 13:08:10,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288644645] [2024-05-12 13:08:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288644645] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:10,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:10,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:10,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538486955] [2024-05-12 13:08:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:10,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:10,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:10,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 231 transitions, 1924 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:10,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:10,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:10,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:11,487 INFO L124 PetriNetUnfolderBase]: 4896/8133 cut-off events. [2024-05-12 13:08:11,487 INFO L125 PetriNetUnfolderBase]: For 456657/456677 co-relation queries the response was YES. [2024-05-12 13:08:11,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51813 conditions, 8133 events. 4896/8133 cut-off events. For 456657/456677 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 55137 event pairs, 1465 based on Foata normal form. 2/7964 useless extension candidates. Maximal degree in co-relation 51721. Up to 6758 conditions per place. [2024-05-12 13:08:11,583 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 205 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-05-12 13:08:11,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 259 transitions, 2484 flow [2024-05-12 13:08:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 13:08:11,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2024-05-12 13:08:11,584 INFO L175 Difference]: Start difference. First operand has 195 places, 231 transitions, 1924 flow. Second operand 7 states and 176 transitions. [2024-05-12 13:08:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 259 transitions, 2484 flow [2024-05-12 13:08:12,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 259 transitions, 2403 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 13:08:12,012 INFO L231 Difference]: Finished difference. Result has 198 places, 234 transitions, 1933 flow [2024-05-12 13:08:12,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1933, PETRI_PLACES=198, PETRI_TRANSITIONS=234} [2024-05-12 13:08:12,013 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-05-12 13:08:12,013 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 234 transitions, 1933 flow [2024-05-12 13:08:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:12,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:12,013 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 13:08:12,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:08:12,013 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 13:08:12,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 436070396, now seen corresponding path program 2 times [2024-05-12 13:08:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368227659] [2024-05-12 13:08:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:12,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:12,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368227659] [2024-05-12 13:08:12,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368227659] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:12,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:12,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:12,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069790886] [2024-05-12 13:08:12,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:12,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:12,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:12,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:12,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:12,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:12,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 234 transitions, 1933 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 13:08:12,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:12,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:12,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:14,177 INFO L124 PetriNetUnfolderBase]: 5187/8449 cut-off events. [2024-05-12 13:08:14,177 INFO L125 PetriNetUnfolderBase]: For 475957/475973 co-relation queries the response was YES. [2024-05-12 13:08:14,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55083 conditions, 8449 events. 5187/8449 cut-off events. For 475957/475973 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 56004 event pairs, 1493 based on Foata normal form. 1/8280 useless extension candidates. Maximal degree in co-relation 54990. Up to 7297 conditions per place. [2024-05-12 13:08:14,272 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 225 selfloop transitions, 22 changer transitions 0/262 dead transitions. [2024-05-12 13:08:14,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 262 transitions, 2563 flow [2024-05-12 13:08:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:14,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:14,273 INFO L175 Difference]: Start difference. First operand has 198 places, 234 transitions, 1933 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:14,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 262 transitions, 2563 flow [2024-05-12 13:08:14,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 262 transitions, 2495 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:14,769 INFO L231 Difference]: Finished difference. Result has 200 places, 237 transitions, 1985 flow [2024-05-12 13:08:14,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=200, PETRI_TRANSITIONS=237} [2024-05-12 13:08:14,770 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-05-12 13:08:14,770 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 237 transitions, 1985 flow [2024-05-12 13:08:14,770 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 13:08:14,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:14,770 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 13:08:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:08:14,770 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:14,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1516557854, now seen corresponding path program 3 times [2024-05-12 13:08:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910056951] [2024-05-12 13:08:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:15,654 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 13:08:15,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:15,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910056951] [2024-05-12 13:08:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910056951] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:15,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:15,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678364167] [2024-05-12 13:08:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:15,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:08:15,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 237 transitions, 1985 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 13:08:15,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:15,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:08:15,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:16,954 INFO L124 PetriNetUnfolderBase]: 5210/8630 cut-off events. [2024-05-12 13:08:16,955 INFO L125 PetriNetUnfolderBase]: For 491559/491589 co-relation queries the response was YES. [2024-05-12 13:08:17,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56154 conditions, 8630 events. 5210/8630 cut-off events. For 491559/491589 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 58378 event pairs, 1493 based on Foata normal form. 5/8418 useless extension candidates. Maximal degree in co-relation 56060. Up to 7295 conditions per place. [2024-05-12 13:08:17,041 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 220 selfloop transitions, 29 changer transitions 0/264 dead transitions. [2024-05-12 13:08:17,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 264 transitions, 2629 flow [2024-05-12 13:08:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-05-12 13:08:17,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2024-05-12 13:08:17,042 INFO L175 Difference]: Start difference. First operand has 200 places, 237 transitions, 1985 flow. Second operand 7 states and 172 transitions. [2024-05-12 13:08:17,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 264 transitions, 2629 flow [2024-05-12 13:08:17,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 264 transitions, 2531 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:17,501 INFO L231 Difference]: Finished difference. Result has 202 places, 240 transitions, 2027 flow [2024-05-12 13:08:17,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2027, PETRI_PLACES=202, PETRI_TRANSITIONS=240} [2024-05-12 13:08:17,502 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-05-12 13:08:17,502 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 240 transitions, 2027 flow [2024-05-12 13:08:17,502 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 13:08:17,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:17,502 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 13:08:17,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:08:17,502 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 13:08:17,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1516558133, now seen corresponding path program 2 times [2024-05-12 13:08:17,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:17,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803738511] [2024-05-12 13:08:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:17,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803738511] [2024-05-12 13:08:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803738511] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:18,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:18,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716609412] [2024-05-12 13:08:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:18,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:18,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 240 transitions, 2027 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:18,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:18,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:19,893 INFO L124 PetriNetUnfolderBase]: 4963/8385 cut-off events. [2024-05-12 13:08:19,893 INFO L125 PetriNetUnfolderBase]: For 503060/503093 co-relation queries the response was YES. [2024-05-12 13:08:19,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54766 conditions, 8385 events. 4963/8385 cut-off events. For 503060/503093 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 58050 event pairs, 1461 based on Foata normal form. 9/8176 useless extension candidates. Maximal degree in co-relation 54671. Up to 6811 conditions per place. [2024-05-12 13:08:19,983 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 207 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-05-12 13:08:19,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 268 transitions, 2617 flow [2024-05-12 13:08:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:08:19,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:08:19,985 INFO L175 Difference]: Start difference. First operand has 202 places, 240 transitions, 2027 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:08:19,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 268 transitions, 2617 flow [2024-05-12 13:08:20,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 268 transitions, 2499 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:20,461 INFO L231 Difference]: Finished difference. Result has 204 places, 243 transitions, 2015 flow [2024-05-12 13:08:20,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2015, PETRI_PLACES=204, PETRI_TRANSITIONS=243} [2024-05-12 13:08:20,462 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 148 predicate places. [2024-05-12 13:08:20,462 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 243 transitions, 2015 flow [2024-05-12 13:08:20,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:20,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:20,462 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 13:08:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:08:20,463 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 13:08:20,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1516884563, now seen corresponding path program 3 times [2024-05-12 13:08:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:20,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442988815] [2024-05-12 13:08:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442988815] [2024-05-12 13:08:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442988815] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:21,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:21,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:08:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519371311] [2024-05-12 13:08:21,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:21,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:08:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:08:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:08:21,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:21,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 243 transitions, 2015 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:21,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:21,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:21,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:23,035 INFO L124 PetriNetUnfolderBase]: 4954/8427 cut-off events. [2024-05-12 13:08:23,035 INFO L125 PetriNetUnfolderBase]: For 511065/511098 co-relation queries the response was YES. [2024-05-12 13:08:23,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55320 conditions, 8427 events. 4954/8427 cut-off events. For 511065/511098 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 58889 event pairs, 1461 based on Foata normal form. 8/8205 useless extension candidates. Maximal degree in co-relation 55224. Up to 6783 conditions per place. [2024-05-12 13:08:23,130 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 202 selfloop transitions, 31 changer transitions 0/273 dead transitions. [2024-05-12 13:08:23,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 273 transitions, 2679 flow [2024-05-12 13:08:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:08:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:08:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:08:23,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:08:23,131 INFO L175 Difference]: Start difference. First operand has 204 places, 243 transitions, 2015 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:08:23,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 273 transitions, 2679 flow [2024-05-12 13:08:23,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 273 transitions, 2559 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-05-12 13:08:23,644 INFO L231 Difference]: Finished difference. Result has 207 places, 249 transitions, 2110 flow [2024-05-12 13:08:23,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2110, PETRI_PLACES=207, PETRI_TRANSITIONS=249} [2024-05-12 13:08:23,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-05-12 13:08:23,645 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 249 transitions, 2110 flow [2024-05-12 13:08:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 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 13:08:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:23,645 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 13:08:23,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:08:23,645 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 13:08:23,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:23,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1516896467, now seen corresponding path program 1 times [2024-05-12 13:08:23,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:23,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104888820] [2024-05-12 13:08:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:23,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:25,307 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 13:08:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104888820] [2024-05-12 13:08:25,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104888820] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:25,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:25,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:08:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76478615] [2024-05-12 13:08:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:08:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:08:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:08:25,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:08:25,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 249 transitions, 2110 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 13:08:25,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:25,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:08:25,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:26,837 INFO L124 PetriNetUnfolderBase]: 4889/8319 cut-off events. [2024-05-12 13:08:26,838 INFO L125 PetriNetUnfolderBase]: For 526554/526585 co-relation queries the response was YES. [2024-05-12 13:08:26,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55790 conditions, 8319 events. 4889/8319 cut-off events. For 526554/526585 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 58241 event pairs, 1566 based on Foata normal form. 6/8031 useless extension candidates. Maximal degree in co-relation 55692. Up to 6833 conditions per place. [2024-05-12 13:08:26,922 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 217 selfloop transitions, 18 changer transitions 0/281 dead transitions. [2024-05-12 13:08:26,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 281 transitions, 2732 flow [2024-05-12 13:08:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:08:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:08:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 13:08:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925 [2024-05-12 13:08:26,923 INFO L175 Difference]: Start difference. First operand has 207 places, 249 transitions, 2110 flow. Second operand 8 states and 197 transitions. [2024-05-12 13:08:26,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 281 transitions, 2732 flow [2024-05-12 13:08:27,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 281 transitions, 2658 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-05-12 13:08:27,354 INFO L231 Difference]: Finished difference. Result has 212 places, 252 transitions, 2142 flow [2024-05-12 13:08:27,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2036, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2142, PETRI_PLACES=212, PETRI_TRANSITIONS=252} [2024-05-12 13:08:27,355 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2024-05-12 13:08:27,355 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 252 transitions, 2142 flow [2024-05-12 13:08:27,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 13:08:27,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:27,355 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 13:08:27,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:08:27,355 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:27,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -105524380, now seen corresponding path program 1 times [2024-05-12 13:08:27,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:27,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154199099] [2024-05-12 13:08:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:27,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:28,453 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 13:08:28,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:28,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154199099] [2024-05-12 13:08:28,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154199099] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:28,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:28,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860153287] [2024-05-12 13:08:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:28,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:28,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 252 transitions, 2142 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 13:08:28,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:28,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:28,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:30,518 INFO L124 PetriNetUnfolderBase]: 6026/9835 cut-off events. [2024-05-12 13:08:30,519 INFO L125 PetriNetUnfolderBase]: For 657762/657762 co-relation queries the response was YES. [2024-05-12 13:08:30,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68036 conditions, 9835 events. 6026/9835 cut-off events. For 657762/657762 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 66039 event pairs, 1394 based on Foata normal form. 16/9612 useless extension candidates. Maximal degree in co-relation 67936. Up to 7804 conditions per place. [2024-05-12 13:08:30,627 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 292 selfloop transitions, 37 changer transitions 0/339 dead transitions. [2024-05-12 13:08:30,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 339 transitions, 3417 flow [2024-05-12 13:08:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 13:08:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 13:08:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-05-12 13:08:30,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236363636363637 [2024-05-12 13:08:30,629 INFO L175 Difference]: Start difference. First operand has 212 places, 252 transitions, 2142 flow. Second operand 11 states and 288 transitions. [2024-05-12 13:08:30,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 339 transitions, 3417 flow [2024-05-12 13:08:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 339 transitions, 3303 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:31,106 INFO L231 Difference]: Finished difference. Result has 216 places, 254 transitions, 2218 flow [2024-05-12 13:08:31,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2218, PETRI_PLACES=216, PETRI_TRANSITIONS=254} [2024-05-12 13:08:31,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 160 predicate places. [2024-05-12 13:08:31,107 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 254 transitions, 2218 flow [2024-05-12 13:08:31,107 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 13:08:31,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:31,107 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 13:08:31,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:08:31,107 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:31,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -12420342, now seen corresponding path program 2 times [2024-05-12 13:08:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982487869] [2024-05-12 13:08:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982487869] [2024-05-12 13:08:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982487869] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:32,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:32,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888144379] [2024-05-12 13:08:32,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:32,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:32,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:32,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:32,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 254 transitions, 2218 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 13:08:32,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:32,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:32,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:34,139 INFO L124 PetriNetUnfolderBase]: 6314/10117 cut-off events. [2024-05-12 13:08:34,140 INFO L125 PetriNetUnfolderBase]: For 731388/731388 co-relation queries the response was YES. [2024-05-12 13:08:34,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73196 conditions, 10117 events. 6314/10117 cut-off events. For 731388/731388 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67239 event pairs, 1842 based on Foata normal form. 16/9938 useless extension candidates. Maximal degree in co-relation 73096. Up to 8497 conditions per place. [2024-05-12 13:08:34,259 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 290 selfloop transitions, 31 changer transitions 0/331 dead transitions. [2024-05-12 13:08:34,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 331 transitions, 3455 flow [2024-05-12 13:08:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-05-12 13:08:34,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522 [2024-05-12 13:08:34,260 INFO L175 Difference]: Start difference. First operand has 216 places, 254 transitions, 2218 flow. Second operand 10 states and 261 transitions. [2024-05-12 13:08:34,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 331 transitions, 3455 flow [2024-05-12 13:08:34,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 331 transitions, 3355 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-05-12 13:08:34,715 INFO L231 Difference]: Finished difference. Result has 219 places, 256 transitions, 2300 flow [2024-05-12 13:08:34,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2300, PETRI_PLACES=219, PETRI_TRANSITIONS=256} [2024-05-12 13:08:34,715 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-05-12 13:08:34,715 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 256 transitions, 2300 flow [2024-05-12 13:08:34,728 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 13:08:34,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:34,728 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 13:08:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:08:34,728 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:34,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:34,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2143045104, now seen corresponding path program 3 times [2024-05-12 13:08:34,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:34,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472391542] [2024-05-12 13:08:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:35,800 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 13:08:35,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:35,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472391542] [2024-05-12 13:08:35,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472391542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:35,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:35,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627012544] [2024-05-12 13:08:35,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:35,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:35,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:35,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:35,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:35,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 256 transitions, 2300 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 13:08:35,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:35,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:35,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:37,805 INFO L124 PetriNetUnfolderBase]: 6278/10099 cut-off events. [2024-05-12 13:08:37,806 INFO L125 PetriNetUnfolderBase]: For 702054/702054 co-relation queries the response was YES. [2024-05-12 13:08:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70648 conditions, 10099 events. 6278/10099 cut-off events. For 702054/702054 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67386 event pairs, 1878 based on Foata normal form. 20/9913 useless extension candidates. Maximal degree in co-relation 70546. Up to 8693 conditions per place. [2024-05-12 13:08:37,932 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 286 selfloop transitions, 29 changer transitions 0/325 dead transitions. [2024-05-12 13:08:37,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 325 transitions, 3159 flow [2024-05-12 13:08:37,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-05-12 13:08:37,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-05-12 13:08:37,933 INFO L175 Difference]: Start difference. First operand has 219 places, 256 transitions, 2300 flow. Second operand 10 states and 255 transitions. [2024-05-12 13:08:37,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 325 transitions, 3159 flow [2024-05-12 13:08:38,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 3061 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:38,508 INFO L231 Difference]: Finished difference. Result has 223 places, 256 transitions, 2267 flow [2024-05-12 13:08:38,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2267, PETRI_PLACES=223, PETRI_TRANSITIONS=256} [2024-05-12 13:08:38,508 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-05-12 13:08:38,508 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 256 transitions, 2267 flow [2024-05-12 13:08:38,508 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 13:08:38,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:38,508 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 13:08:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 13:08:38,509 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:38,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2138283504, now seen corresponding path program 4 times [2024-05-12 13:08:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:38,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915197760] [2024-05-12 13:08:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:39,590 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 13:08:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915197760] [2024-05-12 13:08:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915197760] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914438781] [2024-05-12 13:08:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:39,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:39,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:39,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 256 transitions, 2267 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 13:08:39,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:39,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:39,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:41,677 INFO L124 PetriNetUnfolderBase]: 6250/9983 cut-off events. [2024-05-12 13:08:41,677 INFO L125 PetriNetUnfolderBase]: For 654906/654906 co-relation queries the response was YES. [2024-05-12 13:08:41,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68102 conditions, 9983 events. 6250/9983 cut-off events. For 654906/654906 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 65918 event pairs, 1779 based on Foata normal form. 16/9813 useless extension candidates. Maximal degree in co-relation 67998. Up to 8194 conditions per place. [2024-05-12 13:08:41,796 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 286 selfloop transitions, 34 changer transitions 0/330 dead transitions. [2024-05-12 13:08:41,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 330 transitions, 3156 flow [2024-05-12 13:08:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-05-12 13:08:41,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522 [2024-05-12 13:08:41,797 INFO L175 Difference]: Start difference. First operand has 223 places, 256 transitions, 2267 flow. Second operand 10 states and 261 transitions. [2024-05-12 13:08:41,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 330 transitions, 3156 flow [2024-05-12 13:08:42,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 330 transitions, 3071 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-05-12 13:08:42,422 INFO L231 Difference]: Finished difference. Result has 224 places, 256 transitions, 2256 flow [2024-05-12 13:08:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2256, PETRI_PLACES=224, PETRI_TRANSITIONS=256} [2024-05-12 13:08:42,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-05-12 13:08:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 256 transitions, 2256 flow [2024-05-12 13:08:42,423 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 13:08:42,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:42,423 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 13:08:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 13:08:42,423 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 13:08:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1936674234, now seen corresponding path program 5 times [2024-05-12 13:08:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869361885] [2024-05-12 13:08:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:08:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869361885] [2024-05-12 13:08:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869361885] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:43,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064742375] [2024-05-12 13:08:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:43,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:43,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 256 transitions, 2256 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 13:08:43,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:43,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:43,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:45,755 INFO L124 PetriNetUnfolderBase]: 6417/10317 cut-off events. [2024-05-12 13:08:45,756 INFO L125 PetriNetUnfolderBase]: For 690441/690447 co-relation queries the response was YES. [2024-05-12 13:08:45,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70503 conditions, 10317 events. 6417/10317 cut-off events. For 690441/690447 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 69196 event pairs, 1740 based on Foata normal form. 21/10133 useless extension candidates. Maximal degree in co-relation 70398. Up to 8147 conditions per place. [2024-05-12 13:08:45,863 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 221 selfloop transitions, 97 changer transitions 0/328 dead transitions. [2024-05-12 13:08:45,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 328 transitions, 3206 flow [2024-05-12 13:08:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-05-12 13:08:45,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534 [2024-05-12 13:08:45,864 INFO L175 Difference]: Start difference. First operand has 224 places, 256 transitions, 2256 flow. Second operand 10 states and 267 transitions. [2024-05-12 13:08:45,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 328 transitions, 3206 flow [2024-05-12 13:08:46,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 328 transitions, 3088 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-05-12 13:08:46,454 INFO L231 Difference]: Finished difference. Result has 224 places, 257 transitions, 2397 flow [2024-05-12 13:08:46,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2397, PETRI_PLACES=224, PETRI_TRANSITIONS=257} [2024-05-12 13:08:46,454 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-05-12 13:08:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 257 transitions, 2397 flow [2024-05-12 13:08:46,455 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 13:08:46,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:46,455 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 13:08:46,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 13:08:46,455 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 13:08:46,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1936496604, now seen corresponding path program 6 times [2024-05-12 13:08:46,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:46,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010000521] [2024-05-12 13:08:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:47,505 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 13:08:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010000521] [2024-05-12 13:08:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010000521] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841212530] [2024-05-12 13:08:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:47,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:47,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:47,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 257 transitions, 2397 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 13:08:47,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:47,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:47,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:49,707 INFO L124 PetriNetUnfolderBase]: 6750/10835 cut-off events. [2024-05-12 13:08:49,707 INFO L125 PetriNetUnfolderBase]: For 777943/777949 co-relation queries the response was YES. [2024-05-12 13:08:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76859 conditions, 10835 events. 6750/10835 cut-off events. For 777943/777949 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 73184 event pairs, 1774 based on Foata normal form. 17/10649 useless extension candidates. Maximal degree in co-relation 76754. Up to 8186 conditions per place. [2024-05-12 13:08:49,831 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 225 selfloop transitions, 100 changer transitions 0/335 dead transitions. [2024-05-12 13:08:49,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 335 transitions, 3687 flow [2024-05-12 13:08:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-05-12 13:08:49,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542 [2024-05-12 13:08:49,833 INFO L175 Difference]: Start difference. First operand has 224 places, 257 transitions, 2397 flow. Second operand 10 states and 271 transitions. [2024-05-12 13:08:49,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 335 transitions, 3687 flow [2024-05-12 13:08:50,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 335 transitions, 3460 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-05-12 13:08:50,605 INFO L231 Difference]: Finished difference. Result has 226 places, 259 transitions, 2494 flow [2024-05-12 13:08:50,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2494, PETRI_PLACES=226, PETRI_TRANSITIONS=259} [2024-05-12 13:08:50,606 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 170 predicate places. [2024-05-12 13:08:50,606 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 259 transitions, 2494 flow [2024-05-12 13:08:50,606 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 13:08:50,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:50,606 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 13:08:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 13:08:50,606 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 13:08:50,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1441199668, now seen corresponding path program 7 times [2024-05-12 13:08:50,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:50,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830599436] [2024-05-12 13:08:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:50,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:51,693 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 13:08:51,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:51,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830599436] [2024-05-12 13:08:51,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830599436] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:51,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:51,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276938916] [2024-05-12 13:08:51,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:51,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:51,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:51,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 259 transitions, 2494 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 13:08:51,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:51,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:51,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:53,971 INFO L124 PetriNetUnfolderBase]: 6714/10825 cut-off events. [2024-05-12 13:08:53,971 INFO L125 PetriNetUnfolderBase]: For 748835/748841 co-relation queries the response was YES. [2024-05-12 13:08:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74636 conditions, 10825 events. 6714/10825 cut-off events. For 748835/748841 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 73435 event pairs, 1809 based on Foata normal form. 21/10632 useless extension candidates. Maximal degree in co-relation 74530. Up to 8606 conditions per place. [2024-05-12 13:08:54,102 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 220 selfloop transitions, 99 changer transitions 0/329 dead transitions. [2024-05-12 13:08:54,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 329 transitions, 3386 flow [2024-05-12 13:08:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:08:54,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:08:54,103 INFO L175 Difference]: Start difference. First operand has 226 places, 259 transitions, 2494 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:08:54,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 329 transitions, 3386 flow [2024-05-12 13:08:54,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 329 transitions, 3191 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-05-12 13:08:54,771 INFO L231 Difference]: Finished difference. Result has 230 places, 259 transitions, 2504 flow [2024-05-12 13:08:54,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2504, PETRI_PLACES=230, PETRI_TRANSITIONS=259} [2024-05-12 13:08:54,771 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 174 predicate places. [2024-05-12 13:08:54,771 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 259 transitions, 2504 flow [2024-05-12 13:08:54,771 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 13:08:54,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:54,771 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 13:08:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 13:08:54,771 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 13:08:54,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1765794174, now seen corresponding path program 8 times [2024-05-12 13:08:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:54,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331642567] [2024-05-12 13:08:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:08:55,825 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 13:08:55,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:08:55,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331642567] [2024-05-12 13:08:55,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331642567] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:08:55,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:08:55,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:08:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61981633] [2024-05-12 13:08:55,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:08:55,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:08:55,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:08:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:08:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:08:55,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:08:55,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 2504 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 13:08:55,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:08:55,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:08:55,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:08:58,373 INFO L124 PetriNetUnfolderBase]: 7047/11396 cut-off events. [2024-05-12 13:08:58,373 INFO L125 PetriNetUnfolderBase]: For 805767/805773 co-relation queries the response was YES. [2024-05-12 13:08:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79897 conditions, 11396 events. 7047/11396 cut-off events. For 805767/805773 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78281 event pairs, 1891 based on Foata normal form. 17/11194 useless extension candidates. Maximal degree in co-relation 79789. Up to 8869 conditions per place. [2024-05-12 13:08:58,496 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 230 selfloop transitions, 98 changer transitions 0/338 dead transitions. [2024-05-12 13:08:58,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 338 transitions, 3816 flow [2024-05-12 13:08:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:08:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:08:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-05-12 13:08:58,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-05-12 13:08:58,497 INFO L175 Difference]: Start difference. First operand has 230 places, 259 transitions, 2504 flow. Second operand 10 states and 274 transitions. [2024-05-12 13:08:58,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 338 transitions, 3816 flow [2024-05-12 13:08:59,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 338 transitions, 3608 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-05-12 13:08:59,071 INFO L231 Difference]: Finished difference. Result has 231 places, 261 transitions, 2620 flow [2024-05-12 13:08:59,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2620, PETRI_PLACES=231, PETRI_TRANSITIONS=261} [2024-05-12 13:08:59,071 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 175 predicate places. [2024-05-12 13:08:59,071 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 261 transitions, 2620 flow [2024-05-12 13:08:59,072 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 13:08:59,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:08:59,072 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 13:08:59,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 13:08:59,072 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:08:59,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:08:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1765798824, now seen corresponding path program 9 times [2024-05-12 13:08:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:08:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242806329] [2024-05-12 13:08:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:08:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:08:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242806329] [2024-05-12 13:09:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242806329] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794791722] [2024-05-12 13:09:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:00,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:00,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:00,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:00,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 261 transitions, 2620 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 13:09:00,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:00,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:00,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:02,690 INFO L124 PetriNetUnfolderBase]: 7011/11389 cut-off events. [2024-05-12 13:09:02,690 INFO L125 PetriNetUnfolderBase]: For 791587/791593 co-relation queries the response was YES. [2024-05-12 13:09:02,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78437 conditions, 11389 events. 7011/11389 cut-off events. For 791587/791593 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 78753 event pairs, 1929 based on Foata normal form. 21/11175 useless extension candidates. Maximal degree in co-relation 78328. Up to 9065 conditions per place. [2024-05-12 13:09:02,823 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 226 selfloop transitions, 96 changer transitions 0/332 dead transitions. [2024-05-12 13:09:02,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 332 transitions, 3522 flow [2024-05-12 13:09:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-05-12 13:09:02,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536 [2024-05-12 13:09:02,824 INFO L175 Difference]: Start difference. First operand has 231 places, 261 transitions, 2620 flow. Second operand 10 states and 268 transitions. [2024-05-12 13:09:02,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 332 transitions, 3522 flow [2024-05-12 13:09:03,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 332 transitions, 3323 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:03,747 INFO L231 Difference]: Finished difference. Result has 235 places, 261 transitions, 2620 flow [2024-05-12 13:09:03,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2620, PETRI_PLACES=235, PETRI_TRANSITIONS=261} [2024-05-12 13:09:03,747 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 179 predicate places. [2024-05-12 13:09:03,747 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 261 transitions, 2620 flow [2024-05-12 13:09:03,747 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 13:09:03,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:03,747 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 13:09:03,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 13:09:03,747 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:03,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1765678854, now seen corresponding path program 10 times [2024-05-12 13:09:03,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:03,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467087271] [2024-05-12 13:09:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467087271] [2024-05-12 13:09:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467087271] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795405506] [2024-05-12 13:09:04,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:04,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:04,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:04,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 261 transitions, 2620 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 13:09:04,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:04,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:04,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:07,232 INFO L124 PetriNetUnfolderBase]: 7141/11467 cut-off events. [2024-05-12 13:09:07,232 INFO L125 PetriNetUnfolderBase]: For 777948/777954 co-relation queries the response was YES. [2024-05-12 13:09:07,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79010 conditions, 11467 events. 7141/11467 cut-off events. For 777948/777954 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 78255 event pairs, 1827 based on Foata normal form. 17/11282 useless extension candidates. Maximal degree in co-relation 78899. Up to 8158 conditions per place. [2024-05-12 13:09:07,388 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 222 selfloop transitions, 105 changer transitions 0/337 dead transitions. [2024-05-12 13:09:07,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 337 transitions, 3610 flow [2024-05-12 13:09:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-05-12 13:09:07,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542 [2024-05-12 13:09:07,389 INFO L175 Difference]: Start difference. First operand has 235 places, 261 transitions, 2620 flow. Second operand 10 states and 271 transitions. [2024-05-12 13:09:07,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 337 transitions, 3610 flow [2024-05-12 13:09:08,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 337 transitions, 3413 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-05-12 13:09:08,164 INFO L231 Difference]: Finished difference. Result has 236 places, 262 transitions, 2703 flow [2024-05-12 13:09:08,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2703, PETRI_PLACES=236, PETRI_TRANSITIONS=262} [2024-05-12 13:09:08,165 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 180 predicate places. [2024-05-12 13:09:08,165 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 262 transitions, 2703 flow [2024-05-12 13:09:08,165 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 13:09:08,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:08,165 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 13:09:08,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 13:09:08,165 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 13:09:08,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash -200926537, now seen corresponding path program 1 times [2024-05-12 13:09:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:08,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678916014] [2024-05-12 13:09:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:08,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:08,951 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 13:09:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678916014] [2024-05-12 13:09:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678916014] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767121231] [2024-05-12 13:09:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:09,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:09,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 262 transitions, 2703 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 13:09:09,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:09,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:09,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:10,849 INFO L124 PetriNetUnfolderBase]: 6746/11112 cut-off events. [2024-05-12 13:09:10,849 INFO L125 PetriNetUnfolderBase]: For 754331/754344 co-relation queries the response was YES. [2024-05-12 13:09:10,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76352 conditions, 11112 events. 6746/11112 cut-off events. For 754331/754344 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78499 event pairs, 2129 based on Foata normal form. 11/10836 useless extension candidates. Maximal degree in co-relation 76240. Up to 9601 conditions per place. [2024-05-12 13:09:11,003 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 245 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-05-12 13:09:11,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 3467 flow [2024-05-12 13:09:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:09:11,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:09:11,004 INFO L175 Difference]: Start difference. First operand has 236 places, 262 transitions, 2703 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:09:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 3467 flow [2024-05-12 13:09:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 304 transitions, 3201 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:11,636 INFO L231 Difference]: Finished difference. Result has 237 places, 275 transitions, 2682 flow [2024-05-12 13:09:11,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2682, PETRI_PLACES=237, PETRI_TRANSITIONS=275} [2024-05-12 13:09:11,636 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 181 predicate places. [2024-05-12 13:09:11,636 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 275 transitions, 2682 flow [2024-05-12 13:09:11,636 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 13:09:11,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:11,637 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 13:09:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 13:09:11,637 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 13:09:11,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash -193278217, now seen corresponding path program 2 times [2024-05-12 13:09:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:11,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685265695] [2024-05-12 13:09:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:12,447 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 13:09:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685265695] [2024-05-12 13:09:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685265695] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:12,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:12,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:09:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909755327] [2024-05-12 13:09:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:12,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:09:12,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:09:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:09:12,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:09:12,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 275 transitions, 2682 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 13:09:12,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:12,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:09:12,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:14,385 INFO L124 PetriNetUnfolderBase]: 6783/11170 cut-off events. [2024-05-12 13:09:14,386 INFO L125 PetriNetUnfolderBase]: For 755223/755236 co-relation queries the response was YES. [2024-05-12 13:09:14,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76369 conditions, 11170 events. 6783/11170 cut-off events. For 755223/755236 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 78983 event pairs, 2127 based on Foata normal form. 11/10893 useless extension candidates. Maximal degree in co-relation 76254. Up to 9621 conditions per place. [2024-05-12 13:09:14,536 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 246 selfloop transitions, 31 changer transitions 0/312 dead transitions. [2024-05-12 13:09:14,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 312 transitions, 3605 flow [2024-05-12 13:09:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:09:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:09:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:09:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-05-12 13:09:14,537 INFO L175 Difference]: Start difference. First operand has 237 places, 275 transitions, 2682 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:09:14,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 312 transitions, 3605 flow [2024-05-12 13:09:15,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 312 transitions, 3516 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:15,326 INFO L231 Difference]: Finished difference. Result has 242 places, 283 transitions, 2809 flow [2024-05-12 13:09:15,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2809, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2024-05-12 13:09:15,327 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 186 predicate places. [2024-05-12 13:09:15,327 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 2809 flow [2024-05-12 13:09:15,327 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 13:09:15,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:15,327 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 13:09:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 13:09:15,327 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:15,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1441445932, now seen corresponding path program 1 times [2024-05-12 13:09:15,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:15,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274158664] [2024-05-12 13:09:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:16,516 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 13:09:16,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:16,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274158664] [2024-05-12 13:09:16,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274158664] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:16,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:16,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324832754] [2024-05-12 13:09:16,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:16,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:16,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 2809 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 13:09:16,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:16,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:16,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:18,939 INFO L124 PetriNetUnfolderBase]: 7232/11792 cut-off events. [2024-05-12 13:09:18,939 INFO L125 PetriNetUnfolderBase]: For 803413/803419 co-relation queries the response was YES. [2024-05-12 13:09:19,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81628 conditions, 11792 events. 7232/11792 cut-off events. For 803413/803419 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 82271 event pairs, 2050 based on Foata normal form. 5/11544 useless extension candidates. Maximal degree in co-relation 81511. Up to 10137 conditions per place. [2024-05-12 13:09:19,093 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 282 selfloop transitions, 59 changer transitions 0/351 dead transitions. [2024-05-12 13:09:19,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 351 transitions, 3804 flow [2024-05-12 13:09:19,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-05-12 13:09:19,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-05-12 13:09:19,094 INFO L175 Difference]: Start difference. First operand has 242 places, 283 transitions, 2809 flow. Second operand 10 states and 256 transitions. [2024-05-12 13:09:19,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 351 transitions, 3804 flow [2024-05-12 13:09:20,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 351 transitions, 3717 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-05-12 13:09:20,117 INFO L231 Difference]: Finished difference. Result has 250 places, 288 transitions, 2952 flow [2024-05-12 13:09:20,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2952, PETRI_PLACES=250, PETRI_TRANSITIONS=288} [2024-05-12 13:09:20,117 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 194 predicate places. [2024-05-12 13:09:20,118 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 288 transitions, 2952 flow [2024-05-12 13:09:20,118 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 13:09:20,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:20,118 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 13:09:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 13:09:20,118 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 13:09:20,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -193267305, now seen corresponding path program 1 times [2024-05-12 13:09:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:20,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617659228] [2024-05-12 13:09:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:21,211 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 13:09:21,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:21,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617659228] [2024-05-12 13:09:21,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617659228] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:21,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:21,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:09:21,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026345301] [2024-05-12 13:09:21,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:09:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:09:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:09:21,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-05-12 13:09:21,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 288 transitions, 2952 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 13:09:21,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:21,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-05-12 13:09:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:23,348 INFO L124 PetriNetUnfolderBase]: 6450/10743 cut-off events. [2024-05-12 13:09:23,348 INFO L125 PetriNetUnfolderBase]: For 807197/807276 co-relation queries the response was YES. [2024-05-12 13:09:23,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76926 conditions, 10743 events. 6450/10743 cut-off events. For 807197/807276 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 76801 event pairs, 1991 based on Foata normal form. 16/10415 useless extension candidates. Maximal degree in co-relation 76806. Up to 9024 conditions per place. [2024-05-12 13:09:23,484 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 246 selfloop transitions, 24 changer transitions 0/324 dead transitions. [2024-05-12 13:09:23,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 324 transitions, 3660 flow [2024-05-12 13:09:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:09:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:09:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 13:09:23,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-05-12 13:09:23,485 INFO L175 Difference]: Start difference. First operand has 250 places, 288 transitions, 2952 flow. Second operand 8 states and 202 transitions. [2024-05-12 13:09:23,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 324 transitions, 3660 flow [2024-05-12 13:09:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 324 transitions, 3473 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-05-12 13:09:24,261 INFO L231 Difference]: Finished difference. Result has 251 places, 291 transitions, 2883 flow [2024-05-12 13:09:24,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2765, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2883, PETRI_PLACES=251, PETRI_TRANSITIONS=291} [2024-05-12 13:09:24,261 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 195 predicate places. [2024-05-12 13:09:24,262 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 291 transitions, 2883 flow [2024-05-12 13:09:24,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 13:09:24,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:24,262 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 13:09:24,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 13:09:24,262 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:24,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1245729622, now seen corresponding path program 11 times [2024-05-12 13:09:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968366769] [2024-05-12 13:09:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:25,350 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 13:09:25,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968366769] [2024-05-12 13:09:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968366769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:25,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:25,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:25,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102659825] [2024-05-12 13:09:25,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:25,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:25,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 291 transitions, 2883 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 13:09:25,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:25,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:25,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:28,067 INFO L124 PetriNetUnfolderBase]: 7433/12101 cut-off events. [2024-05-12 13:09:28,068 INFO L125 PetriNetUnfolderBase]: For 903668/903668 co-relation queries the response was YES. [2024-05-12 13:09:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86578 conditions, 12101 events. 7433/12101 cut-off events. For 903668/903668 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 84556 event pairs, 1951 based on Foata normal form. 20/11867 useless extension candidates. Maximal degree in co-relation 86457. Up to 9698 conditions per place. [2024-05-12 13:09:28,227 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 237 selfloop transitions, 111 changer transitions 0/358 dead transitions. [2024-05-12 13:09:28,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 358 transitions, 3915 flow [2024-05-12 13:09:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-05-12 13:09:28,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-05-12 13:09:28,228 INFO L175 Difference]: Start difference. First operand has 251 places, 291 transitions, 2883 flow. Second operand 10 states and 259 transitions. [2024-05-12 13:09:28,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 358 transitions, 3915 flow [2024-05-12 13:09:29,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 358 transitions, 3819 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:29,163 INFO L231 Difference]: Finished difference. Result has 255 places, 292 transitions, 3084 flow [2024-05-12 13:09:29,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3084, PETRI_PLACES=255, PETRI_TRANSITIONS=292} [2024-05-12 13:09:29,164 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 199 predicate places. [2024-05-12 13:09:29,164 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 292 transitions, 3084 flow [2024-05-12 13:09:29,164 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 13:09:29,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:29,164 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 13:09:29,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 13:09:29,164 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:29,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1877892294, now seen corresponding path program 12 times [2024-05-12 13:09:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895909606] [2024-05-12 13:09:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:29,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895909606] [2024-05-12 13:09:30,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895909606] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:30,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:30,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:30,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845161001] [2024-05-12 13:09:30,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:30,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:30,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 292 transitions, 3084 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 13:09:30,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:30,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:30,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:32,979 INFO L124 PetriNetUnfolderBase]: 7600/12396 cut-off events. [2024-05-12 13:09:32,979 INFO L125 PetriNetUnfolderBase]: For 959551/959551 co-relation queries the response was YES. [2024-05-12 13:09:33,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90495 conditions, 12396 events. 7600/12396 cut-off events. For 959551/959551 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 87171 event pairs, 2008 based on Foata normal form. 20/12158 useless extension candidates. Maximal degree in co-relation 90373. Up to 9955 conditions per place. [2024-05-12 13:09:33,147 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 245 selfloop transitions, 105 changer transitions 0/360 dead transitions. [2024-05-12 13:09:33,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 360 transitions, 4128 flow [2024-05-12 13:09:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-05-12 13:09:33,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522 [2024-05-12 13:09:33,148 INFO L175 Difference]: Start difference. First operand has 255 places, 292 transitions, 3084 flow. Second operand 10 states and 261 transitions. [2024-05-12 13:09:33,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 360 transitions, 4128 flow [2024-05-12 13:09:34,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 360 transitions, 3863 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:34,271 INFO L231 Difference]: Finished difference. Result has 257 places, 293 transitions, 3106 flow [2024-05-12 13:09:34,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3106, PETRI_PLACES=257, PETRI_TRANSITIONS=293} [2024-05-12 13:09:34,272 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 201 predicate places. [2024-05-12 13:09:34,272 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 293 transitions, 3106 flow [2024-05-12 13:09:34,272 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 13:09:34,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:34,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:09:34,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 13:09:34,272 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:34,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1877714664, now seen corresponding path program 13 times [2024-05-12 13:09:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:34,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336561014] [2024-05-12 13:09:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:35,324 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 13:09:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336561014] [2024-05-12 13:09:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336561014] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:35,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256543383] [2024-05-12 13:09:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:35,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:35,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 293 transitions, 3106 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 13:09:35,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:35,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:35,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:38,359 INFO L124 PetriNetUnfolderBase]: 7933/12883 cut-off events. [2024-05-12 13:09:38,360 INFO L125 PetriNetUnfolderBase]: For 1056785/1056785 co-relation queries the response was YES. [2024-05-12 13:09:38,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96579 conditions, 12883 events. 7933/12883 cut-off events. For 1056785/1056785 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 90757 event pairs, 2002 based on Foata normal form. 16/12649 useless extension candidates. Maximal degree in co-relation 96456. Up to 9770 conditions per place. [2024-05-12 13:09:38,512 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 248 selfloop transitions, 109 changer transitions 0/367 dead transitions. [2024-05-12 13:09:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 367 transitions, 4540 flow [2024-05-12 13:09:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:09:38,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:09:38,513 INFO L175 Difference]: Start difference. First operand has 257 places, 293 transitions, 3106 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:09:38,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 367 transitions, 4540 flow [2024-05-12 13:09:39,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 367 transitions, 4285 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:39,309 INFO L231 Difference]: Finished difference. Result has 259 places, 295 transitions, 3217 flow [2024-05-12 13:09:39,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3217, PETRI_PLACES=259, PETRI_TRANSITIONS=295} [2024-05-12 13:09:39,309 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 203 predicate places. [2024-05-12 13:09:39,309 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 295 transitions, 3217 flow [2024-05-12 13:09:39,310 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 13:09:39,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:39,310 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 13:09:39,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 13:09:39,310 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:39,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1884148404, now seen corresponding path program 14 times [2024-05-12 13:09:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:39,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92638808] [2024-05-12 13:09:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:39,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:40,362 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 13:09:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:40,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92638808] [2024-05-12 13:09:40,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92638808] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:40,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:40,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142915455] [2024-05-12 13:09:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:40,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:40,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:40,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:40,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 295 transitions, 3217 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 13:09:40,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:40,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:40,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:43,177 INFO L124 PetriNetUnfolderBase]: 7897/12917 cut-off events. [2024-05-12 13:09:43,177 INFO L125 PetriNetUnfolderBase]: For 1011302/1011302 co-relation queries the response was YES. [2024-05-12 13:09:43,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93843 conditions, 12917 events. 7897/12917 cut-off events. For 1011302/1011302 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 91866 event pairs, 2075 based on Foata normal form. 20/12662 useless extension candidates. Maximal degree in co-relation 93719. Up to 10414 conditions per place. [2024-05-12 13:09:43,346 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 248 selfloop transitions, 104 changer transitions 0/362 dead transitions. [2024-05-12 13:09:43,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 362 transitions, 4197 flow [2024-05-12 13:09:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 13:09:43,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524 [2024-05-12 13:09:43,347 INFO L175 Difference]: Start difference. First operand has 259 places, 295 transitions, 3217 flow. Second operand 10 states and 262 transitions. [2024-05-12 13:09:43,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 362 transitions, 4197 flow [2024-05-12 13:09:44,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 362 transitions, 3969 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-05-12 13:09:44,475 INFO L231 Difference]: Finished difference. Result has 263 places, 295 transitions, 3204 flow [2024-05-12 13:09:44,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3204, PETRI_PLACES=263, PETRI_TRANSITIONS=295} [2024-05-12 13:09:44,475 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 207 predicate places. [2024-05-12 13:09:44,475 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 295 transitions, 3204 flow [2024-05-12 13:09:44,475 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 13:09:44,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:44,475 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 13:09:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 13:09:44,476 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:44,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1914475350, now seen corresponding path program 15 times [2024-05-12 13:09:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451179470] [2024-05-12 13:09:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451179470] [2024-05-12 13:09:45,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451179470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:45,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791958386] [2024-05-12 13:09:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:45,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:45,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 295 transitions, 3204 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 13:09:45,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:45,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:45,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:48,396 INFO L124 PetriNetUnfolderBase]: 8064/13178 cut-off events. [2024-05-12 13:09:48,397 INFO L125 PetriNetUnfolderBase]: For 1010746/1010746 co-relation queries the response was YES. [2024-05-12 13:09:48,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95221 conditions, 13178 events. 8064/13178 cut-off events. For 1010746/1010746 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 93965 event pairs, 2105 based on Foata normal form. 20/12924 useless extension candidates. Maximal degree in co-relation 95095. Up to 10671 conditions per place. [2024-05-12 13:09:48,584 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 252 selfloop transitions, 101 changer transitions 0/363 dead transitions. [2024-05-12 13:09:48,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 363 transitions, 4258 flow [2024-05-12 13:09:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-05-12 13:09:48,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526 [2024-05-12 13:09:48,585 INFO L175 Difference]: Start difference. First operand has 263 places, 295 transitions, 3204 flow. Second operand 10 states and 263 transitions. [2024-05-12 13:09:48,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 363 transitions, 4258 flow [2024-05-12 13:09:49,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 363 transitions, 4033 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 13:09:49,741 INFO L231 Difference]: Finished difference. Result has 264 places, 296 transitions, 3262 flow [2024-05-12 13:09:49,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3262, PETRI_PLACES=264, PETRI_TRANSITIONS=296} [2024-05-12 13:09:49,742 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 208 predicate places. [2024-05-12 13:09:49,742 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 296 transitions, 3262 flow [2024-05-12 13:09:49,742 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 13:09:49,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:49,742 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 13:09:49,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 13:09:49,743 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:49,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:49,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1908219240, now seen corresponding path program 16 times [2024-05-12 13:09:49,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:49,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944557540] [2024-05-12 13:09:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:49,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:09:50,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:50,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944557540] [2024-05-12 13:09:50,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944557540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:50,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:50,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:50,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181540388] [2024-05-12 13:09:50,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:50,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:50,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:50,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:50,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 296 transitions, 3262 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 13:09:50,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:50,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:50,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:53,924 INFO L124 PetriNetUnfolderBase]: 8231/13483 cut-off events. [2024-05-12 13:09:53,924 INFO L125 PetriNetUnfolderBase]: For 1069335/1069335 co-relation queries the response was YES. [2024-05-12 13:09:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98412 conditions, 13483 events. 8231/13483 cut-off events. For 1069335/1069335 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 96838 event pairs, 2165 based on Foata normal form. 20/13219 useless extension candidates. Maximal degree in co-relation 98285. Up to 10928 conditions per place. [2024-05-12 13:09:54,087 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 255 selfloop transitions, 100 changer transitions 0/365 dead transitions. [2024-05-12 13:09:54,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 365 transitions, 4328 flow [2024-05-12 13:09:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:09:54,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:09:54,088 INFO L175 Difference]: Start difference. First operand has 264 places, 296 transitions, 3262 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:09:54,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 365 transitions, 4328 flow [2024-05-12 13:09:55,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 365 transitions, 4077 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-05-12 13:09:55,162 INFO L231 Difference]: Finished difference. Result has 266 places, 297 transitions, 3294 flow [2024-05-12 13:09:55,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3294, PETRI_PLACES=266, PETRI_TRANSITIONS=297} [2024-05-12 13:09:55,163 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-05-12 13:09:55,163 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 297 transitions, 3294 flow [2024-05-12 13:09:55,163 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 13:09:55,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:09:55,163 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 13:09:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 13:09:55,163 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:09:55,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:09:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1908041610, now seen corresponding path program 17 times [2024-05-12 13:09:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:09:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58470888] [2024-05-12 13:09:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:09:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:09:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:09:56,242 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 13:09:56,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:09:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58470888] [2024-05-12 13:09:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58470888] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:09:56,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:09:56,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:09:56,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989227335] [2024-05-12 13:09:56,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:09:56,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:09:56,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:09:56,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:09:56,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:09:56,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:09:56,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 297 transitions, 3294 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 13:09:56,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:09:56,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:09:56,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:09:59,623 INFO L124 PetriNetUnfolderBase]: 8361/13662 cut-off events. [2024-05-12 13:09:59,623 INFO L125 PetriNetUnfolderBase]: For 1078728/1078728 co-relation queries the response was YES. [2024-05-12 13:09:59,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99567 conditions, 13662 events. 8361/13662 cut-off events. For 1078728/1078728 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 98009 event pairs, 2136 based on Foata normal form. 16/13400 useless extension candidates. Maximal degree in co-relation 99439. Up to 10700 conditions per place. [2024-05-12 13:09:59,809 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 256 selfloop transitions, 103 changer transitions 0/369 dead transitions. [2024-05-12 13:09:59,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 369 transitions, 4384 flow [2024-05-12 13:09:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:09:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:09:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-05-12 13:09:59,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534 [2024-05-12 13:09:59,810 INFO L175 Difference]: Start difference. First operand has 266 places, 297 transitions, 3294 flow. Second operand 10 states and 267 transitions. [2024-05-12 13:09:59,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 369 transitions, 4384 flow [2024-05-12 13:10:01,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 369 transitions, 4133 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-05-12 13:10:01,110 INFO L231 Difference]: Finished difference. Result has 268 places, 298 transitions, 3333 flow [2024-05-12 13:10:01,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3333, PETRI_PLACES=268, PETRI_TRANSITIONS=298} [2024-05-12 13:10:01,110 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 212 predicate places. [2024-05-12 13:10:01,110 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 298 transitions, 3333 flow [2024-05-12 13:10:01,110 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 13:10:01,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:01,111 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 13:10:01,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 13:10:01,111 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:01,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash -63862108, now seen corresponding path program 18 times [2024-05-12 13:10:01,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:01,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039080720] [2024-05-12 13:10:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:01,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:02,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:02,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039080720] [2024-05-12 13:10:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039080720] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:02,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:02,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:02,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947234285] [2024-05-12 13:10:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:02,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:02,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:02,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:02,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 298 transitions, 3333 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 13:10:02,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:02,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:06,039 INFO L124 PetriNetUnfolderBase]: 8694/14262 cut-off events. [2024-05-12 13:10:06,039 INFO L125 PetriNetUnfolderBase]: For 1206207/1206207 co-relation queries the response was YES. [2024-05-12 13:10:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106258 conditions, 14262 events. 8694/14262 cut-off events. For 1206207/1206207 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 103608 event pairs, 2237 based on Foata normal form. 16/13990 useless extension candidates. Maximal degree in co-relation 106129. Up to 11393 conditions per place. [2024-05-12 13:10:06,452 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 258 selfloop transitions, 105 changer transitions 0/373 dead transitions. [2024-05-12 13:10:06,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 373 transitions, 4821 flow [2024-05-12 13:10:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-05-12 13:10:06,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536 [2024-05-12 13:10:06,453 INFO L175 Difference]: Start difference. First operand has 268 places, 298 transitions, 3333 flow. Second operand 10 states and 268 transitions. [2024-05-12 13:10:06,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 373 transitions, 4821 flow [2024-05-12 13:10:07,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 373 transitions, 4551 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-05-12 13:10:07,717 INFO L231 Difference]: Finished difference. Result has 270 places, 300 transitions, 3437 flow [2024-05-12 13:10:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3437, PETRI_PLACES=270, PETRI_TRANSITIONS=300} [2024-05-12 13:10:07,718 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 214 predicate places. [2024-05-12 13:10:07,718 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 300 transitions, 3437 flow [2024-05-12 13:10:07,718 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 13:10:07,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:07,718 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 13:10:07,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 13:10:07,718 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1741985460, now seen corresponding path program 19 times [2024-05-12 13:10:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641798783] [2024-05-12 13:10:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:08,934 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 13:10:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641798783] [2024-05-12 13:10:08,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641798783] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:08,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:08,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:08,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896322992] [2024-05-12 13:10:08,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:08,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:09,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:09,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 300 transitions, 3437 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 13:10:09,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:09,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:09,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:12,530 INFO L124 PetriNetUnfolderBase]: 8658/14242 cut-off events. [2024-05-12 13:10:12,530 INFO L125 PetriNetUnfolderBase]: For 1150622/1150622 co-relation queries the response was YES. [2024-05-12 13:10:12,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102971 conditions, 14242 events. 8658/14242 cut-off events. For 1150622/1150622 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 103636 event pairs, 2273 based on Foata normal form. 20/13964 useless extension candidates. Maximal degree in co-relation 102841. Up to 11589 conditions per place. [2024-05-12 13:10:12,696 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 254 selfloop transitions, 103 changer transitions 0/367 dead transitions. [2024-05-12 13:10:12,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 367 transitions, 4427 flow [2024-05-12 13:10:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-05-12 13:10:12,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524 [2024-05-12 13:10:12,697 INFO L175 Difference]: Start difference. First operand has 270 places, 300 transitions, 3437 flow. Second operand 10 states and 262 transitions. [2024-05-12 13:10:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 367 transitions, 4427 flow [2024-05-12 13:10:14,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 367 transitions, 4183 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-05-12 13:10:14,052 INFO L231 Difference]: Finished difference. Result has 274 places, 300 transitions, 3406 flow [2024-05-12 13:10:14,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3406, PETRI_PLACES=274, PETRI_TRANSITIONS=300} [2024-05-12 13:10:14,052 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 218 predicate places. [2024-05-12 13:10:14,052 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 300 transitions, 3406 flow [2024-05-12 13:10:14,052 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 13:10:14,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:14,053 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 13:10:14,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 13:10:14,053 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:14,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1737223860, now seen corresponding path program 20 times [2024-05-12 13:10:14,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:14,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446668885] [2024-05-12 13:10:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:15,132 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 13:10:15,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446668885] [2024-05-12 13:10:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446668885] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:15,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:15,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081686879] [2024-05-12 13:10:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:15,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:15,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:15,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 300 transitions, 3406 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 13:10:15,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:15,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:18,597 INFO L124 PetriNetUnfolderBase]: 8698/14064 cut-off events. [2024-05-12 13:10:18,597 INFO L125 PetriNetUnfolderBase]: For 1076760/1076760 co-relation queries the response was YES. [2024-05-12 13:10:18,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100825 conditions, 14064 events. 8698/14064 cut-off events. For 1076760/1076760 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 100159 event pairs, 2106 based on Foata normal form. 16/13847 useless extension candidates. Maximal degree in co-relation 100693. Up to 9670 conditions per place. [2024-05-12 13:10:18,761 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 245 selfloop transitions, 117 changer transitions 0/372 dead transitions. [2024-05-12 13:10:18,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 372 transitions, 4502 flow [2024-05-12 13:10:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-05-12 13:10:18,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-05-12 13:10:18,763 INFO L175 Difference]: Start difference. First operand has 274 places, 300 transitions, 3406 flow. Second operand 10 states and 265 transitions. [2024-05-12 13:10:18,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 372 transitions, 4502 flow [2024-05-12 13:10:20,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 372 transitions, 4289 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-05-12 13:10:20,090 INFO L231 Difference]: Finished difference. Result has 275 places, 301 transitions, 3515 flow [2024-05-12 13:10:20,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3515, PETRI_PLACES=275, PETRI_TRANSITIONS=301} [2024-05-12 13:10:20,090 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 219 predicate places. [2024-05-12 13:10:20,091 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 301 transitions, 3515 flow [2024-05-12 13:10:20,091 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 13:10:20,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:20,091 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 13:10:20,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 13:10:20,091 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:20,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:20,091 INFO L85 PathProgramCache]: Analyzing trace with hash 995183287, now seen corresponding path program 3 times [2024-05-12 13:10:20,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139130254] [2024-05-12 13:10:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:20,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:20,940 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 13:10:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139130254] [2024-05-12 13:10:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139130254] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:20,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983707561] [2024-05-12 13:10:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:21,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:21,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 301 transitions, 3515 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 13:10:21,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:21,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:24,026 INFO L124 PetriNetUnfolderBase]: 8230/13656 cut-off events. [2024-05-12 13:10:24,027 INFO L125 PetriNetUnfolderBase]: For 1041926/1041945 co-relation queries the response was YES. [2024-05-12 13:10:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97872 conditions, 13656 events. 8230/13656 cut-off events. For 1041926/1041945 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 100589 event pairs, 2528 based on Foata normal form. 19/13278 useless extension candidates. Maximal degree in co-relation 97739. Up to 11864 conditions per place. [2024-05-12 13:10:24,200 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 269 selfloop transitions, 24 changer transitions 0/328 dead transitions. [2024-05-12 13:10:24,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 328 transitions, 4180 flow [2024-05-12 13:10:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-05-12 13:10:24,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-05-12 13:10:24,201 INFO L175 Difference]: Start difference. First operand has 275 places, 301 transitions, 3515 flow. Second operand 7 states and 174 transitions. [2024-05-12 13:10:24,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 328 transitions, 4180 flow [2024-05-12 13:10:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 328 transitions, 3846 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-05-12 13:10:25,529 INFO L231 Difference]: Finished difference. Result has 274 places, 302 transitions, 3244 flow [2024-05-12 13:10:25,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3244, PETRI_PLACES=274, PETRI_TRANSITIONS=302} [2024-05-12 13:10:25,530 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 218 predicate places. [2024-05-12 13:10:25,530 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 302 transitions, 3244 flow [2024-05-12 13:10:25,530 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 13:10:25,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:25,530 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 13:10:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 13:10:25,531 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:25,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -731947159, now seen corresponding path program 4 times [2024-05-12 13:10:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823445259] [2024-05-12 13:10:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:26,527 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 13:10:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:26,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823445259] [2024-05-12 13:10:26,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823445259] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:26,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:26,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:10:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323199059] [2024-05-12 13:10:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:10:26,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:10:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:10:26,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-05-12 13:10:26,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 302 transitions, 3244 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 13:10:26,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:26,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-05-12 13:10:26,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:29,316 INFO L124 PetriNetUnfolderBase]: 8247/13679 cut-off events. [2024-05-12 13:10:29,316 INFO L125 PetriNetUnfolderBase]: For 1017618/1017637 co-relation queries the response was YES. [2024-05-12 13:10:29,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95192 conditions, 13679 events. 8247/13679 cut-off events. For 1017618/1017637 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 100866 event pairs, 2522 based on Foata normal form. 19/13301 useless extension candidates. Maximal degree in co-relation 95058. Up to 11858 conditions per place. [2024-05-12 13:10:29,665 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 263 selfloop transitions, 32 changer transitions 0/330 dead transitions. [2024-05-12 13:10:29,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 330 transitions, 3980 flow [2024-05-12 13:10:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:10:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:10:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-05-12 13:10:29,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-05-12 13:10:29,667 INFO L175 Difference]: Start difference. First operand has 274 places, 302 transitions, 3244 flow. Second operand 7 states and 173 transitions. [2024-05-12 13:10:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 330 transitions, 3980 flow [2024-05-12 13:10:30,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 330 transitions, 3939 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 13:10:30,867 INFO L231 Difference]: Finished difference. Result has 278 places, 305 transitions, 3345 flow [2024-05-12 13:10:30,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3345, PETRI_PLACES=278, PETRI_TRANSITIONS=305} [2024-05-12 13:10:30,868 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 222 predicate places. [2024-05-12 13:10:30,868 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 305 transitions, 3345 flow [2024-05-12 13:10:30,868 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 13:10:30,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:30,868 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 13:10:30,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 13:10:30,868 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:30,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash 109051676, now seen corresponding path program 2 times [2024-05-12 13:10:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891167346] [2024-05-12 13:10:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:10:32,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:32,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891167346] [2024-05-12 13:10:32,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891167346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:32,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:32,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:32,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843901012] [2024-05-12 13:10:32,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:32,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:32,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:32,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:32,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 305 transitions, 3345 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 13:10:32,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:32,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:32,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:35,633 INFO L124 PetriNetUnfolderBase]: 8749/14435 cut-off events. [2024-05-12 13:10:35,633 INFO L125 PetriNetUnfolderBase]: For 1068788/1068793 co-relation queries the response was YES. [2024-05-12 13:10:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100822 conditions, 14435 events. 8749/14435 cut-off events. For 1068788/1068793 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 105766 event pairs, 2541 based on Foata normal form. 8/14130 useless extension candidates. Maximal degree in co-relation 100686. Up to 12473 conditions per place. [2024-05-12 13:10:35,848 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 299 selfloop transitions, 61 changer transitions 0/370 dead transitions. [2024-05-12 13:10:35,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 370 transitions, 4398 flow [2024-05-12 13:10:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:10:35,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506 [2024-05-12 13:10:35,850 INFO L175 Difference]: Start difference. First operand has 278 places, 305 transitions, 3345 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:10:35,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 370 transitions, 4398 flow [2024-05-12 13:10:37,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 370 transitions, 4278 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 13:10:37,395 INFO L231 Difference]: Finished difference. Result has 284 places, 310 transitions, 3485 flow [2024-05-12 13:10:37,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3225, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3485, PETRI_PLACES=284, PETRI_TRANSITIONS=310} [2024-05-12 13:10:37,395 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 228 predicate places. [2024-05-12 13:10:37,397 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 310 transitions, 3485 flow [2024-05-12 13:10:37,397 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 13:10:37,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:10:37,397 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 13:10:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 13:10:37,398 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:10:37,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:10:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1245975886, now seen corresponding path program 3 times [2024-05-12 13:10:37,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:10:37,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619152771] [2024-05-12 13:10:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:10:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:10:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:10:38,625 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 13:10:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:10:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619152771] [2024-05-12 13:10:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619152771] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:10:38,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:10:38,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:10:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465429119] [2024-05-12 13:10:38,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:10:38,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:10:38,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:10:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:10:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:10:38,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-05-12 13:10:38,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 310 transitions, 3485 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 13:10:38,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:10:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-05-12 13:10:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:10:42,034 INFO L124 PetriNetUnfolderBase]: 8809/14529 cut-off events. [2024-05-12 13:10:42,034 INFO L125 PetriNetUnfolderBase]: For 1103786/1103791 co-relation queries the response was YES. [2024-05-12 13:10:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103228 conditions, 14529 events. 8809/14529 cut-off events. For 1103786/1103791 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 106452 event pairs, 2541 based on Foata normal form. 8/14221 useless extension candidates. Maximal degree in co-relation 103090. Up to 12552 conditions per place. [2024-05-12 13:10:42,232 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 297 selfloop transitions, 68 changer transitions 0/375 dead transitions. [2024-05-12 13:10:42,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 375 transitions, 4558 flow [2024-05-12 13:10:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:10:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:10:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 13:10:42,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502 [2024-05-12 13:10:42,233 INFO L175 Difference]: Start difference. First operand has 284 places, 310 transitions, 3485 flow. Second operand 10 states and 251 transitions. [2024-05-12 13:10:42,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 375 transitions, 4558 flow