./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:55:35,959 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:55:36,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:55:36,063 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:55:36,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:55:36,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:55:36,093 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:55:36,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:55:36,094 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:55:36,098 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:55:36,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:55:36,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:55:36,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:55:36,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:55:36,101 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:55:36,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:55:36,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:55:36,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:55:36,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:55:36,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:55:36,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:55:36,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:55:36,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:55:36,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:55:36,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:55:36,104 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:55:36,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:55:36,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:55:36,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:55:36,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:55:36,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:55:36,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:55:36,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:55:36,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:55:36,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:55:36,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:55:36,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:55:36,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:55:36,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:55:36,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:55:36,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:55:36,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:55:36,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:55:36,110 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:55:36,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:55:36,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:55:36,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:55:36,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:55:36,388 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:55:36,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-27 18:55:37,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:55:37,816 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:55:37,817 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i [2024-06-27 18:55:37,838 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a3606bd/68b69138e7a749b3832251b4758f0848/FLAG3d078ad04 [2024-06-27 18:55:37,851 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40a3606bd/68b69138e7a749b3832251b4758f0848 [2024-06-27 18:55:37,853 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:55:37,854 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:55:37,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe012_rmo.oepc.yml/witness.yml [2024-06-27 18:55:38,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:55:38,107 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:55:38,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:55:38,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:55:38,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:55:38,117 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:55:37" (1/2) ... [2024-06-27 18:55:38,118 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d381645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:55:38, skipping insertion in model container [2024-06-27 18:55:38,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:55:37" (1/2) ... [2024-06-27 18:55:38,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61839001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:55:38, skipping insertion in model container [2024-06-27 18:55:38,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:55:38" (2/2) ... [2024-06-27 18:55:38,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d381645 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38, skipping insertion in model container [2024-06-27 18:55:38,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:55:38" (2/2) ... [2024-06-27 18:55:38,121 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:55:38,260 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:55:38,261 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:55:38,262 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:55:38,262 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:55:38,262 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:55:38,262 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-27 18:55:38,308 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:55:38,508 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i[993,1006] [2024-06-27 18:55:38,743 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:55:38,761 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:55:38,797 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_rmo.oepc.i[993,1006] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:55:38,902 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:55:38,935 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:55:38,936 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38 WrapperNode [2024-06-27 18:55:38,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:55:38,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:55:38,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:55:38,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:55:38,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:38,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,036 INFO L138 Inliner]: procedures = 175, calls = 67, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 171 [2024-06-27 18:55:39,039 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:55:39,040 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:55:39,040 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:55:39,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:55:39,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,065 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,098 INFO L175 MemorySlicer]: Split 27 memory accesses to 2 slices as follows [2, 25]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 18:55:39,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,115 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:55:39,119 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:55:39,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:55:39,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:55:39,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (1/1) ... [2024-06-27 18:55:39,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:55:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:55:39,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:55:39,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:55:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:55:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:55:39,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:55:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:55:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:55:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:55:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:55:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:55:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:55:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:55:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:55:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:55:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:55:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:55:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:55:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:55:39,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:55:39,200 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:55:39,373 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:55:39,375 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:55:39,864 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:55:39,864 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:55:40,217 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:55:40,217 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:55:40,218 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:55:40 BoogieIcfgContainer [2024-06-27 18:55:40,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:55:40,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:55:40,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:55:40,224 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:55:40,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:55:37" (1/4) ... [2024-06-27 18:55:40,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ca416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:55:40, skipping insertion in model container [2024-06-27 18:55:40,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:55:38" (2/4) ... [2024-06-27 18:55:40,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ca416 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:55:40, skipping insertion in model container [2024-06-27 18:55:40,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:55:38" (3/4) ... [2024-06-27 18:55:40,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7ca416 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:55:40, skipping insertion in model container [2024-06-27 18:55:40,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:55:40" (4/4) ... [2024-06-27 18:55:40,228 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_rmo.oepc.i [2024-06-27 18:55:40,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:55:40,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:55:40,247 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:55:40,311 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:55:40,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:55:40,392 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:55:40,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:55:40,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:55:40,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:55:40,401 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:55:40,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:55:40,425 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;@29c1e85c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:55:40,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:55:40,429 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:55:40,430 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:55:40,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:55:40,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:40,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:55:40,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:40,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 562947262, now seen corresponding path program 1 times [2024-06-27 18:55:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:40,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973008138] [2024-06-27 18:55:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:42,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:42,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973008138] [2024-06-27 18:55:42,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973008138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:42,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:42,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:55:42,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883157920] [2024-06-27 18:55:42,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:55:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:42,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:55:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:55:42,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:55:42,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:42,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:42,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:55:42,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:43,671 INFO L124 PetriNetUnfolderBase]: 2180/3473 cut-off events. [2024-06-27 18:55:43,672 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 18:55:43,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3473 events. 2180/3473 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19798 event pairs, 1317 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 6714. Up to 3184 conditions per place. [2024-06-27 18:55:43,735 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:55:43,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-27 18:55:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:55:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:55:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 18:55:43,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 18:55:43,749 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-27 18:55:43,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-27 18:55:43,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:55:43,759 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:55:43,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:55:43,764 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:55:43,764 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:55:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:43,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:43,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:43,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:55:43,766 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:43,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -173536579, now seen corresponding path program 1 times [2024-06-27 18:55:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188102114] [2024-06-27 18:55:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:46,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:46,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188102114] [2024-06-27 18:55:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188102114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:46,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:46,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:55:46,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55240428] [2024-06-27 18:55:46,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:55:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:55:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:55:46,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:55:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:55:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:47,589 INFO L124 PetriNetUnfolderBase]: 2174/3323 cut-off events. [2024-06-27 18:55:47,589 INFO L125 PetriNetUnfolderBase]: For 604/612 co-relation queries the response was YES. [2024-06-27 18:55:47,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 3323 events. 2174/3323 cut-off events. For 604/612 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18310 event pairs, 893 based on Foata normal form. 6/3323 useless extension candidates. Maximal degree in co-relation 7430. Up to 3142 conditions per place. [2024-06-27 18:55:47,608 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:55:47,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-27 18:55:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:55:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:55:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 18:55:47,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 18:55:47,611 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-27 18:55:47,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-27 18:55:47,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:55:47,614 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:55:47,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:55:47,615 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:55:47,615 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:55:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:47,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:47,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:47,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:55:47,616 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:47,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1313203755, now seen corresponding path program 1 times [2024-06-27 18:55:47,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:47,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933934642] [2024-06-27 18:55:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:51,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:51,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933934642] [2024-06-27 18:55:51,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933934642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:51,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:51,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:55:51,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750935444] [2024-06-27 18:55:51,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:55:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:55:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:55:51,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:55:51,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:51,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:51,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:55:51,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:53,044 INFO L124 PetriNetUnfolderBase]: 2769/4162 cut-off events. [2024-06-27 18:55:53,044 INFO L125 PetriNetUnfolderBase]: For 2308/2332 co-relation queries the response was YES. [2024-06-27 18:55:53,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 4162 events. 2769/4162 cut-off events. For 2308/2332 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22556 event pairs, 709 based on Foata normal form. 15/4169 useless extension candidates. Maximal degree in co-relation 10420. Up to 3890 conditions per place. [2024-06-27 18:55:53,068 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-27 18:55:53,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-27 18:55:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:55:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:55:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:55:53,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:55:53,071 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:55:53,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-27 18:55:53,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:55:53,076 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:55:53,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 18:55:53,077 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:55:53,077 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:55:53,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:53,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:53,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:55:53,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1186770810, now seen corresponding path program 1 times [2024-06-27 18:55:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:53,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199763295] [2024-06-27 18:55:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:53,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:54,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:54,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199763295] [2024-06-27 18:55:54,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199763295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:54,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:54,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:55:54,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820688970] [2024-06-27 18:55:54,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:54,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:55:54,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:55:54,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:55:54,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:55:54,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:54,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:54,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:55:54,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:56,074 INFO L124 PetriNetUnfolderBase]: 2764/4342 cut-off events. [2024-06-27 18:55:56,074 INFO L125 PetriNetUnfolderBase]: For 3974/3998 co-relation queries the response was YES. [2024-06-27 18:55:56,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11560 conditions, 4342 events. 2764/4342 cut-off events. For 3974/3998 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24626 event pairs, 1100 based on Foata normal form. 11/4350 useless extension candidates. Maximal degree in co-relation 11540. Up to 3990 conditions per place. [2024-06-27 18:55:56,109 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 63 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-27 18:55:56,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 474 flow [2024-06-27 18:55:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:55:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:55:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 18:55:56,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-27 18:55:56,113 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 124 transitions. [2024-06-27 18:55:56,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 474 flow [2024-06-27 18:55:56,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 445 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:55:56,121 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 286 flow [2024-06-27 18:55:56,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 18:55:56,123 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 18:55:56,123 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 286 flow [2024-06-27 18:55:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:56,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:56,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:56,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:55:56,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:56,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:56,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1864808899, now seen corresponding path program 1 times [2024-06-27 18:55:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:56,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540054835] [2024-06-27 18:55:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:56,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:55:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:55:58,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:55:58,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540054835] [2024-06-27 18:55:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540054835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:55:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:55:58,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:55:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898636445] [2024-06-27 18:55:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:55:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:55:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:55:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:55:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:55:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:55:58,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:58,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:55:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:55:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:55:59,738 INFO L124 PetriNetUnfolderBase]: 3302/5146 cut-off events. [2024-06-27 18:55:59,738 INFO L125 PetriNetUnfolderBase]: For 6104/6104 co-relation queries the response was YES. [2024-06-27 18:55:59,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14480 conditions, 5146 events. 3302/5146 cut-off events. For 6104/6104 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29434 event pairs, 1327 based on Foata normal form. 2/5146 useless extension candidates. Maximal degree in co-relation 14458. Up to 4726 conditions per place. [2024-06-27 18:55:59,765 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 81 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 18:55:59,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 616 flow [2024-06-27 18:55:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:55:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:55:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 18:55:59,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:55:59,768 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 286 flow. Second operand 6 states and 144 transitions. [2024-06-27 18:55:59,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 616 flow [2024-06-27 18:55:59,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 102 transitions, 575 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:55:59,775 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 382 flow [2024-06-27 18:55:59,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=382, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-06-27 18:55:59,776 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:55:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 382 flow [2024-06-27 18:55:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:55:59,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:55:59,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:55:59,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:55:59,777 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:55:59,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:55:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1980221191, now seen corresponding path program 1 times [2024-06-27 18:55:59,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:55:59,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272666005] [2024-06-27 18:55:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:55:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:55:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272666005] [2024-06-27 18:56:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272666005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:02,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847204717] [2024-06-27 18:56:02,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:02,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:02,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:02,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:02,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:02,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:02,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:02,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:04,053 INFO L124 PetriNetUnfolderBase]: 3148/4732 cut-off events. [2024-06-27 18:56:04,053 INFO L125 PetriNetUnfolderBase]: For 9246/9396 co-relation queries the response was YES. [2024-06-27 18:56:04,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 4732 events. 3148/4732 cut-off events. For 9246/9396 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 26144 event pairs, 894 based on Foata normal form. 38/4748 useless extension candidates. Maximal degree in co-relation 15062. Up to 4397 conditions per place. [2024-06-27 18:56:04,085 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2024-06-27 18:56:04,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 122 transitions, 790 flow [2024-06-27 18:56:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 18:56:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:56:04,087 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 382 flow. Second operand 6 states and 160 transitions. [2024-06-27 18:56:04,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 122 transitions, 790 flow [2024-06-27 18:56:04,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 122 transitions, 778 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:04,097 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 508 flow [2024-06-27 18:56:04,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2024-06-27 18:56:04,098 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:56:04,098 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 508 flow [2024-06-27 18:56:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:04,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:04,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:04,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:56:04,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:04,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1573222501, now seen corresponding path program 2 times [2024-06-27 18:56:04,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:04,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155683096] [2024-06-27 18:56:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155683096] [2024-06-27 18:56:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155683096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:06,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:06,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701813279] [2024-06-27 18:56:06,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:06,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:06,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:06,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:06,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:06,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:06,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:08,232 INFO L124 PetriNetUnfolderBase]: 3251/4900 cut-off events. [2024-06-27 18:56:08,232 INFO L125 PetriNetUnfolderBase]: For 13153/13226 co-relation queries the response was YES. [2024-06-27 18:56:08,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17161 conditions, 4900 events. 3251/4900 cut-off events. For 13153/13226 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27380 event pairs, 892 based on Foata normal form. 16/4898 useless extension candidates. Maximal degree in co-relation 17132. Up to 4531 conditions per place. [2024-06-27 18:56:08,261 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 82 selfloop transitions, 24 changer transitions 0/117 dead transitions. [2024-06-27 18:56:08,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 820 flow [2024-06-27 18:56:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:08,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 18:56:08,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-06-27 18:56:08,263 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 508 flow. Second operand 6 states and 154 transitions. [2024-06-27 18:56:08,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 820 flow [2024-06-27 18:56:08,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 804 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:08,279 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 550 flow [2024-06-27 18:56:08,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-27 18:56:08,281 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-06-27 18:56:08,281 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 550 flow [2024-06-27 18:56:08,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:08,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:08,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:08,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:56:08,282 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:08,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:08,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1030745824, now seen corresponding path program 1 times [2024-06-27 18:56:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:08,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450540751] [2024-06-27 18:56:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:10,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:10,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450540751] [2024-06-27 18:56:10,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450540751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:10,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:10,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951736715] [2024-06-27 18:56:10,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:10,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:10,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:10,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:10,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 550 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:10,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:10,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:10,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:13,011 INFO L124 PetriNetUnfolderBase]: 3566/5357 cut-off events. [2024-06-27 18:56:13,011 INFO L125 PetriNetUnfolderBase]: For 15136/15393 co-relation queries the response was YES. [2024-06-27 18:56:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18727 conditions, 5357 events. 3566/5357 cut-off events. For 15136/15393 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 29672 event pairs, 917 based on Foata normal form. 45/5381 useless extension candidates. Maximal degree in co-relation 18695. Up to 4708 conditions per place. [2024-06-27 18:56:13,046 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 145 selfloop transitions, 41 changer transitions 0/197 dead transitions. [2024-06-27 18:56:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 197 transitions, 1346 flow [2024-06-27 18:56:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:56:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:56:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 290 transitions. [2024-06-27 18:56:13,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609284332688588 [2024-06-27 18:56:13,049 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 550 flow. Second operand 11 states and 290 transitions. [2024-06-27 18:56:13,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 197 transitions, 1346 flow [2024-06-27 18:56:13,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 197 transitions, 1294 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:56:13,067 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 791 flow [2024-06-27 18:56:13,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=791, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-06-27 18:56:13,068 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2024-06-27 18:56:13,068 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 791 flow [2024-06-27 18:56:13,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:13,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:13,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:56:13,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:13,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1086615528, now seen corresponding path program 2 times [2024-06-27 18:56:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:13,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694975846] [2024-06-27 18:56:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:16,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:16,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694975846] [2024-06-27 18:56:16,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694975846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:16,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:16,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:16,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093899445] [2024-06-27 18:56:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:16,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:16,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:16,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:16,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:16,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:16,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:16,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:16,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:17,988 INFO L124 PetriNetUnfolderBase]: 3602/5425 cut-off events. [2024-06-27 18:56:17,988 INFO L125 PetriNetUnfolderBase]: For 21041/21322 co-relation queries the response was YES. [2024-06-27 18:56:18,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21402 conditions, 5425 events. 3602/5425 cut-off events. For 21041/21322 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30147 event pairs, 886 based on Foata normal form. 70/5474 useless extension candidates. Maximal degree in co-relation 21364. Up to 4972 conditions per place. [2024-06-27 18:56:18,029 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 126 selfloop transitions, 30 changer transitions 0/167 dead transitions. [2024-06-27 18:56:18,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 167 transitions, 1327 flow [2024-06-27 18:56:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:56:18,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-27 18:56:18,032 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 791 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:56:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 167 transitions, 1327 flow [2024-06-27 18:56:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 167 transitions, 1288 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:18,072 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 876 flow [2024-06-27 18:56:18,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2024-06-27 18:56:18,074 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2024-06-27 18:56:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 876 flow [2024-06-27 18:56:18,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:18,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:18,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:18,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:56:18,078 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:18,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 479538676, now seen corresponding path program 3 times [2024-06-27 18:56:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747144337] [2024-06-27 18:56:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:21,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:21,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747144337] [2024-06-27 18:56:21,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747144337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:21,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:21,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795161467] [2024-06-27 18:56:21,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:23,152 INFO L124 PetriNetUnfolderBase]: 3650/5485 cut-off events. [2024-06-27 18:56:23,152 INFO L125 PetriNetUnfolderBase]: For 25672/26044 co-relation queries the response was YES. [2024-06-27 18:56:23,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22901 conditions, 5485 events. 3650/5485 cut-off events. For 25672/26044 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30426 event pairs, 904 based on Foata normal form. 39/5498 useless extension candidates. Maximal degree in co-relation 22862. Up to 4876 conditions per place. [2024-06-27 18:56:23,188 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 114 selfloop transitions, 44 changer transitions 0/169 dead transitions. [2024-06-27 18:56:23,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1454 flow [2024-06-27 18:56:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 18:56:23,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 18:56:23,192 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 876 flow. Second operand 7 states and 188 transitions. [2024-06-27 18:56:23,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1454 flow [2024-06-27 18:56:23,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 169 transitions, 1390 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 18:56:23,227 INFO L231 Difference]: Finished difference. Result has 97 places, 117 transitions, 978 flow [2024-06-27 18:56:23,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=978, PETRI_PLACES=97, PETRI_TRANSITIONS=117} [2024-06-27 18:56:23,230 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-27 18:56:23,230 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 117 transitions, 978 flow [2024-06-27 18:56:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:23,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:23,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:56:23,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:23,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1257313122, now seen corresponding path program 1 times [2024-06-27 18:56:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:23,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818700088] [2024-06-27 18:56:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:26,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818700088] [2024-06-27 18:56:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818700088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:26,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968802664] [2024-06-27 18:56:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:26,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:26,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:26,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 117 transitions, 978 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:26,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:26,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:26,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:28,305 INFO L124 PetriNetUnfolderBase]: 4017/5966 cut-off events. [2024-06-27 18:56:28,305 INFO L125 PetriNetUnfolderBase]: For 29836/29840 co-relation queries the response was YES. [2024-06-27 18:56:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25329 conditions, 5966 events. 4017/5966 cut-off events. For 29836/29840 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32559 event pairs, 1019 based on Foata normal form. 6/5969 useless extension candidates. Maximal degree in co-relation 25289. Up to 5532 conditions per place. [2024-06-27 18:56:28,416 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 159 selfloop transitions, 28 changer transitions 0/194 dead transitions. [2024-06-27 18:56:28,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 194 transitions, 1748 flow [2024-06-27 18:56:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:56:28,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:56:28,419 INFO L175 Difference]: Start difference. First operand has 97 places, 117 transitions, 978 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:56:28,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 194 transitions, 1748 flow [2024-06-27 18:56:28,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 194 transitions, 1690 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:28,467 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1191 flow [2024-06-27 18:56:28,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-27 18:56:28,468 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 18:56:28,468 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1191 flow [2024-06-27 18:56:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:28,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:28,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:28,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:56:28,469 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:28,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1525018470, now seen corresponding path program 2 times [2024-06-27 18:56:28,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:28,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123677967] [2024-06-27 18:56:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:28,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:31,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123677967] [2024-06-27 18:56:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123677967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:31,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:31,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:31,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530450362] [2024-06-27 18:56:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:31,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:31,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:31,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1191 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:31,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:31,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:31,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:32,802 INFO L124 PetriNetUnfolderBase]: 4048/6031 cut-off events. [2024-06-27 18:56:32,803 INFO L125 PetriNetUnfolderBase]: For 33835/33854 co-relation queries the response was YES. [2024-06-27 18:56:32,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27005 conditions, 6031 events. 4048/6031 cut-off events. For 33835/33854 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 33089 event pairs, 1013 based on Foata normal form. 16/6043 useless extension candidates. Maximal degree in co-relation 26960. Up to 5564 conditions per place. [2024-06-27 18:56:32,844 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 156 selfloop transitions, 36 changer transitions 0/199 dead transitions. [2024-06-27 18:56:32,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 199 transitions, 1877 flow [2024-06-27 18:56:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:56:32,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 18:56:32,846 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1191 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:56:32,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 199 transitions, 1877 flow [2024-06-27 18:56:32,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 1853 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:32,905 INFO L231 Difference]: Finished difference. Result has 112 places, 146 transitions, 1356 flow [2024-06-27 18:56:32,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1356, PETRI_PLACES=112, PETRI_TRANSITIONS=146} [2024-06-27 18:56:32,906 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 61 predicate places. [2024-06-27 18:56:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 146 transitions, 1356 flow [2024-06-27 18:56:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:32,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:32,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:56:32,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:32,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1080181788, now seen corresponding path program 4 times [2024-06-27 18:56:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:32,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623996373] [2024-06-27 18:56:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:36,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:36,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623996373] [2024-06-27 18:56:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623996373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:36,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:36,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:36,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818103552] [2024-06-27 18:56:36,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:36,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:36,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:36,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:56:36,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 146 transitions, 1356 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:36,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:36,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:56:36,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:37,845 INFO L124 PetriNetUnfolderBase]: 3853/5832 cut-off events. [2024-06-27 18:56:37,845 INFO L125 PetriNetUnfolderBase]: For 37921/38110 co-relation queries the response was YES. [2024-06-27 18:56:37,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27122 conditions, 5832 events. 3853/5832 cut-off events. For 37921/38110 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33214 event pairs, 882 based on Foata normal form. 36/5760 useless extension candidates. Maximal degree in co-relation 27072. Up to 4990 conditions per place. [2024-06-27 18:56:37,882 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 122 selfloop transitions, 52 changer transitions 0/194 dead transitions. [2024-06-27 18:56:37,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 194 transitions, 1860 flow [2024-06-27 18:56:37,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:37,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:56:37,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:56:37,885 INFO L175 Difference]: Start difference. First operand has 112 places, 146 transitions, 1356 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:56:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 194 transitions, 1860 flow [2024-06-27 18:56:37,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 194 transitions, 1815 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:37,929 INFO L231 Difference]: Finished difference. Result has 117 places, 146 transitions, 1424 flow [2024-06-27 18:56:37,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1424, PETRI_PLACES=117, PETRI_TRANSITIONS=146} [2024-06-27 18:56:37,930 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 18:56:37,930 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 146 transitions, 1424 flow [2024-06-27 18:56:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:37,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:37,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:56:37,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:37,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1080181602, now seen corresponding path program 3 times [2024-06-27 18:56:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:37,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010622989] [2024-06-27 18:56:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010622989] [2024-06-27 18:56:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010622989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364055082] [2024-06-27 18:56:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:41,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:41,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:41,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:41,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 146 transitions, 1424 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:41,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:41,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:41,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:42,767 INFO L124 PetriNetUnfolderBase]: 4035/6013 cut-off events. [2024-06-27 18:56:42,767 INFO L125 PetriNetUnfolderBase]: For 39652/39671 co-relation queries the response was YES. [2024-06-27 18:56:42,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27662 conditions, 6013 events. 4035/6013 cut-off events. For 39652/39671 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32950 event pairs, 1012 based on Foata normal form. 16/6025 useless extension candidates. Maximal degree in co-relation 27610. Up to 5548 conditions per place. [2024-06-27 18:56:42,810 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 155 selfloop transitions, 35 changer transitions 0/197 dead transitions. [2024-06-27 18:56:42,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 197 transitions, 1978 flow [2024-06-27 18:56:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:56:42,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:56:42,812 INFO L175 Difference]: Start difference. First operand has 117 places, 146 transitions, 1424 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:56:42,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 197 transitions, 1978 flow [2024-06-27 18:56:42,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 1840 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:56:42,860 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1364 flow [2024-06-27 18:56:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1364, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-27 18:56:42,860 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 67 predicate places. [2024-06-27 18:56:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1364 flow [2024-06-27 18:56:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:42,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:42,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:42,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:56:42,861 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:42,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1079935524, now seen corresponding path program 1 times [2024-06-27 18:56:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919237163] [2024-06-27 18:56:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:45,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919237163] [2024-06-27 18:56:45,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919237163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:45,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:45,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144842840] [2024-06-27 18:56:45,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:45,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:45,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1364 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:45,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:45,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:45,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:46,995 INFO L124 PetriNetUnfolderBase]: 4027/6248 cut-off events. [2024-06-27 18:56:46,996 INFO L125 PetriNetUnfolderBase]: For 39643/39645 co-relation queries the response was YES. [2024-06-27 18:56:47,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27627 conditions, 6248 events. 4027/6248 cut-off events. For 39643/39645 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 36013 event pairs, 1264 based on Foata normal form. 4/6250 useless extension candidates. Maximal degree in co-relation 27574. Up to 5679 conditions per place. [2024-06-27 18:56:47,031 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 166 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2024-06-27 18:56:47,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 190 transitions, 1874 flow [2024-06-27 18:56:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:56:47,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:56:47,033 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1364 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:56:47,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 190 transitions, 1874 flow [2024-06-27 18:56:47,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 190 transitions, 1837 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:47,074 INFO L231 Difference]: Finished difference. Result has 122 places, 149 transitions, 1401 flow [2024-06-27 18:56:47,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=122, PETRI_TRANSITIONS=149} [2024-06-27 18:56:47,075 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 71 predicate places. [2024-06-27 18:56:47,075 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 149 transitions, 1401 flow [2024-06-27 18:56:47,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:47,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:47,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:56:47,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:47,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash -322149379, now seen corresponding path program 1 times [2024-06-27 18:56:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:47,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209310644] [2024-06-27 18:56:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:50,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209310644] [2024-06-27 18:56:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209310644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:50,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:50,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296570724] [2024-06-27 18:56:50,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:50,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:50,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 1401 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:50,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:50,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:50,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:51,991 INFO L124 PetriNetUnfolderBase]: 4058/6058 cut-off events. [2024-06-27 18:56:51,991 INFO L125 PetriNetUnfolderBase]: For 42997/43005 co-relation queries the response was YES. [2024-06-27 18:56:52,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28239 conditions, 6058 events. 4058/6058 cut-off events. For 42997/43005 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33416 event pairs, 934 based on Foata normal form. 10/6066 useless extension candidates. Maximal degree in co-relation 28185. Up to 5588 conditions per place. [2024-06-27 18:56:52,040 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 197 selfloop transitions, 28 changer transitions 0/232 dead transitions. [2024-06-27 18:56:52,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 232 transitions, 2219 flow [2024-06-27 18:56:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:56:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:56:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:56:52,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:56:52,042 INFO L175 Difference]: Start difference. First operand has 122 places, 149 transitions, 1401 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:56:52,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 232 transitions, 2219 flow [2024-06-27 18:56:52,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 232 transitions, 2169 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 18:56:52,098 INFO L231 Difference]: Finished difference. Result has 127 places, 164 transitions, 1595 flow [2024-06-27 18:56:52,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1595, PETRI_PLACES=127, PETRI_TRANSITIONS=164} [2024-06-27 18:56:52,099 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 76 predicate places. [2024-06-27 18:56:52,099 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 164 transitions, 1595 flow [2024-06-27 18:56:52,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:52,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:52,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:52,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:56:52,100 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:52,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash -321999649, now seen corresponding path program 2 times [2024-06-27 18:56:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066288223] [2024-06-27 18:56:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066288223] [2024-06-27 18:56:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066288223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:55,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:55,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:56:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270746025] [2024-06-27 18:56:55,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:56:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:56:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:56:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 164 transitions, 1595 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:55,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:55,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:57,628 INFO L124 PetriNetUnfolderBase]: 4125/6155 cut-off events. [2024-06-27 18:56:57,628 INFO L125 PetriNetUnfolderBase]: For 49190/49192 co-relation queries the response was YES. [2024-06-27 18:56:57,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29901 conditions, 6155 events. 4125/6155 cut-off events. For 49190/49192 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33922 event pairs, 924 based on Foata normal form. 2/6154 useless extension candidates. Maximal degree in co-relation 29844. Up to 5365 conditions per place. [2024-06-27 18:56:57,670 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 180 selfloop transitions, 57 changer transitions 0/244 dead transitions. [2024-06-27 18:56:57,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 244 transitions, 2531 flow [2024-06-27 18:56:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:56:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:56:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:56:57,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:56:57,672 INFO L175 Difference]: Start difference. First operand has 127 places, 164 transitions, 1595 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:56:57,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 244 transitions, 2531 flow [2024-06-27 18:56:57,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 244 transitions, 2484 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:57,749 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 1831 flow [2024-06-27 18:56:57,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1831, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-27 18:56:57,749 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-06-27 18:56:57,749 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 1831 flow [2024-06-27 18:56:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:57,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:57,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:56:57,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:57,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1980798723, now seen corresponding path program 3 times [2024-06-27 18:56:57,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562382269] [2024-06-27 18:56:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:00,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:00,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562382269] [2024-06-27 18:57:00,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562382269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:00,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:00,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047270893] [2024-06-27 18:57:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:00,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:00,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:00,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:00,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:00,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:02,947 INFO L124 PetriNetUnfolderBase]: 4120/6148 cut-off events. [2024-06-27 18:57:02,948 INFO L125 PetriNetUnfolderBase]: For 55382/55384 co-relation queries the response was YES. [2024-06-27 18:57:02,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31448 conditions, 6148 events. 4120/6148 cut-off events. For 55382/55384 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33850 event pairs, 924 based on Foata normal form. 2/6147 useless extension candidates. Maximal degree in co-relation 31387. Up to 5360 conditions per place. [2024-06-27 18:57:02,987 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 180 selfloop transitions, 55 changer transitions 0/242 dead transitions. [2024-06-27 18:57:02,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 242 transitions, 2588 flow [2024-06-27 18:57:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 18:57:02,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611702127659575 [2024-06-27 18:57:02,989 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 1831 flow. Second operand 8 states and 211 transitions. [2024-06-27 18:57:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 242 transitions, 2588 flow [2024-06-27 18:57:03,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 242 transitions, 2543 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:03,059 INFO L231 Difference]: Finished difference. Result has 140 places, 177 transitions, 1904 flow [2024-06-27 18:57:03,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1904, PETRI_PLACES=140, PETRI_TRANSITIONS=177} [2024-06-27 18:57:03,060 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-06-27 18:57:03,060 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 177 transitions, 1904 flow [2024-06-27 18:57:03,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:03,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:03,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:57:03,061 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:03,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash -38288075, now seen corresponding path program 4 times [2024-06-27 18:57:03,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:03,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423437347] [2024-06-27 18:57:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423437347] [2024-06-27 18:57:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423437347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:05,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:05,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525231735] [2024-06-27 18:57:05,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:05,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:05,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 177 transitions, 1904 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:05,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:05,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:05,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:08,019 INFO L124 PetriNetUnfolderBase]: 4151/6207 cut-off events. [2024-06-27 18:57:08,019 INFO L125 PetriNetUnfolderBase]: For 59468/59485 co-relation queries the response was YES. [2024-06-27 18:57:08,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32229 conditions, 6207 events. 4151/6207 cut-off events. For 59468/59485 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34215 event pairs, 922 based on Foata normal form. 6/6206 useless extension candidates. Maximal degree in co-relation 32166. Up to 5392 conditions per place. [2024-06-27 18:57:08,070 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 177 selfloop transitions, 59 changer transitions 0/243 dead transitions. [2024-06-27 18:57:08,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 243 transitions, 2712 flow [2024-06-27 18:57:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:57:08,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:57:08,072 INFO L175 Difference]: Start difference. First operand has 140 places, 177 transitions, 1904 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:57:08,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 243 transitions, 2712 flow [2024-06-27 18:57:08,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2581 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:08,143 INFO L231 Difference]: Finished difference. Result has 143 places, 181 transitions, 1959 flow [2024-06-27 18:57:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=143, PETRI_TRANSITIONS=181} [2024-06-27 18:57:08,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 92 predicate places. [2024-06-27 18:57:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 181 transitions, 1959 flow [2024-06-27 18:57:08,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:08,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:08,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:08,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:57:08,145 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:08,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2124694833, now seen corresponding path program 5 times [2024-06-27 18:57:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276406499] [2024-06-27 18:57:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:11,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276406499] [2024-06-27 18:57:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276406499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:11,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182054442] [2024-06-27 18:57:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:11,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:11,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:11,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:11,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 181 transitions, 1959 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:11,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:11,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:11,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:13,204 INFO L124 PetriNetUnfolderBase]: 4182/6262 cut-off events. [2024-06-27 18:57:13,204 INFO L125 PetriNetUnfolderBase]: For 62490/62507 co-relation queries the response was YES. [2024-06-27 18:57:13,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32774 conditions, 6262 events. 4182/6262 cut-off events. For 62490/62507 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34637 event pairs, 924 based on Foata normal form. 6/6261 useless extension candidates. Maximal degree in co-relation 32709. Up to 5424 conditions per place. [2024-06-27 18:57:13,252 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 178 selfloop transitions, 61 changer transitions 0/246 dead transitions. [2024-06-27 18:57:13,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 246 transitions, 2773 flow [2024-06-27 18:57:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:57:13,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:57:13,254 INFO L175 Difference]: Start difference. First operand has 143 places, 181 transitions, 1959 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:57:13,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 246 transitions, 2773 flow [2024-06-27 18:57:13,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 246 transitions, 2581 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:13,323 INFO L231 Difference]: Finished difference. Result has 144 places, 184 transitions, 1943 flow [2024-06-27 18:57:13,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1943, PETRI_PLACES=144, PETRI_TRANSITIONS=184} [2024-06-27 18:57:13,323 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:57:13,323 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 184 transitions, 1943 flow [2024-06-27 18:57:13,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:13,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:13,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:13,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:57:13,324 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:13,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:13,325 INFO L85 PathProgramCache]: Analyzing trace with hash 881461825, now seen corresponding path program 6 times [2024-06-27 18:57:13,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:13,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025741117] [2024-06-27 18:57:13,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:13,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025741117] [2024-06-27 18:57:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025741117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:16,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:16,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:16,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107282684] [2024-06-27 18:57:16,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:16,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:16,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:16,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:16,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:16,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:16,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 184 transitions, 1943 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:16,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:16,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:16,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:18,260 INFO L124 PetriNetUnfolderBase]: 4177/6251 cut-off events. [2024-06-27 18:57:18,260 INFO L125 PetriNetUnfolderBase]: For 63374/63391 co-relation queries the response was YES. [2024-06-27 18:57:18,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32459 conditions, 6251 events. 4177/6251 cut-off events. For 63374/63391 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34492 event pairs, 922 based on Foata normal form. 6/6250 useless extension candidates. Maximal degree in co-relation 32394. Up to 5419 conditions per place. [2024-06-27 18:57:18,305 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 172 selfloop transitions, 66 changer transitions 0/245 dead transitions. [2024-06-27 18:57:18,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 245 transitions, 2637 flow [2024-06-27 18:57:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:57:18,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 18:57:18,306 INFO L175 Difference]: Start difference. First operand has 144 places, 184 transitions, 1943 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:57:18,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 245 transitions, 2637 flow [2024-06-27 18:57:18,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 245 transitions, 2513 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:18,378 INFO L231 Difference]: Finished difference. Result has 147 places, 185 transitions, 1969 flow [2024-06-27 18:57:18,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=147, PETRI_TRANSITIONS=185} [2024-06-27 18:57:18,378 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-27 18:57:18,378 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 185 transitions, 1969 flow [2024-06-27 18:57:18,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:18,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:18,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:57:18,379 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:18,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:18,379 INFO L85 PathProgramCache]: Analyzing trace with hash -386212807, now seen corresponding path program 1 times [2024-06-27 18:57:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:18,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188242182] [2024-06-27 18:57:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:21,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:21,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188242182] [2024-06-27 18:57:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188242182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:21,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:21,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:21,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693735530] [2024-06-27 18:57:21,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:21,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:21,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:57:21,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 185 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:21,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:21,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:57:21,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:23,893 INFO L124 PetriNetUnfolderBase]: 4093/6237 cut-off events. [2024-06-27 18:57:23,893 INFO L125 PetriNetUnfolderBase]: For 75223/75368 co-relation queries the response was YES. [2024-06-27 18:57:23,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33271 conditions, 6237 events. 4093/6237 cut-off events. For 75223/75368 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36099 event pairs, 475 based on Foata normal form. 33/6125 useless extension candidates. Maximal degree in co-relation 33205. Up to 5180 conditions per place. [2024-06-27 18:57:23,944 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 188 selfloop transitions, 52 changer transitions 0/271 dead transitions. [2024-06-27 18:57:23,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 271 transitions, 2863 flow [2024-06-27 18:57:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:57:23,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-06-27 18:57:23,946 INFO L175 Difference]: Start difference. First operand has 147 places, 185 transitions, 1969 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:57:23,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 271 transitions, 2863 flow [2024-06-27 18:57:24,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 271 transitions, 2759 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:24,044 INFO L231 Difference]: Finished difference. Result has 151 places, 189 transitions, 2036 flow [2024-06-27 18:57:24,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2036, PETRI_PLACES=151, PETRI_TRANSITIONS=189} [2024-06-27 18:57:24,045 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 100 predicate places. [2024-06-27 18:57:24,045 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 189 transitions, 2036 flow [2024-06-27 18:57:24,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:24,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:24,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:24,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:57:24,045 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:24,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1159923825, now seen corresponding path program 2 times [2024-06-27 18:57:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:24,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395684686] [2024-06-27 18:57:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:27,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395684686] [2024-06-27 18:57:27,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395684686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:27,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:27,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983708005] [2024-06-27 18:57:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:57:27,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 189 transitions, 2036 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:27,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:27,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:57:27,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:29,362 INFO L124 PetriNetUnfolderBase]: 4081/6221 cut-off events. [2024-06-27 18:57:29,362 INFO L125 PetriNetUnfolderBase]: For 81434/81628 co-relation queries the response was YES. [2024-06-27 18:57:29,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33684 conditions, 6221 events. 4081/6221 cut-off events. For 81434/81628 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36019 event pairs, 716 based on Foata normal form. 25/6101 useless extension candidates. Maximal degree in co-relation 33617. Up to 5356 conditions per place. [2024-06-27 18:57:29,420 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 178 selfloop transitions, 48 changer transitions 0/257 dead transitions. [2024-06-27 18:57:29,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 257 transitions, 2716 flow [2024-06-27 18:57:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:57:29,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:57:29,422 INFO L175 Difference]: Start difference. First operand has 151 places, 189 transitions, 2036 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:57:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 257 transitions, 2716 flow [2024-06-27 18:57:29,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 257 transitions, 2621 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:29,630 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 2047 flow [2024-06-27 18:57:29,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2047, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-06-27 18:57:29,631 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 103 predicate places. [2024-06-27 18:57:29,631 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 2047 flow [2024-06-27 18:57:29,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:29,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:29,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:29,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:57:29,631 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:29,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1275214995, now seen corresponding path program 3 times [2024-06-27 18:57:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:29,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261871256] [2024-06-27 18:57:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261871256] [2024-06-27 18:57:33,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261871256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:33,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:33,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892320710] [2024-06-27 18:57:33,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:33,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:33,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:57:33,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 2047 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:33,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:57:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:35,286 INFO L124 PetriNetUnfolderBase]: 4169/6341 cut-off events. [2024-06-27 18:57:35,286 INFO L125 PetriNetUnfolderBase]: For 86162/86300 co-relation queries the response was YES. [2024-06-27 18:57:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34558 conditions, 6341 events. 4169/6341 cut-off events. For 86162/86300 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 36890 event pairs, 733 based on Foata normal form. 7/6181 useless extension candidates. Maximal degree in co-relation 34489. Up to 5292 conditions per place. [2024-06-27 18:57:35,337 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 154 selfloop transitions, 68 changer transitions 0/253 dead transitions. [2024-06-27 18:57:35,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 253 transitions, 2725 flow [2024-06-27 18:57:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:57:35,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:57:35,338 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 2047 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:57:35,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 253 transitions, 2725 flow [2024-06-27 18:57:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 253 transitions, 2619 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:35,460 INFO L231 Difference]: Finished difference. Result has 155 places, 191 transitions, 2121 flow [2024-06-27 18:57:35,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2121, PETRI_PLACES=155, PETRI_TRANSITIONS=191} [2024-06-27 18:57:35,461 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 104 predicate places. [2024-06-27 18:57:35,461 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 191 transitions, 2121 flow [2024-06-27 18:57:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:35,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:35,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:57:35,462 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:35,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1275399693, now seen corresponding path program 1 times [2024-06-27 18:57:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:35,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746962651] [2024-06-27 18:57:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:38,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746962651] [2024-06-27 18:57:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746962651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:38,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947581859] [2024-06-27 18:57:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:38,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:38,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 191 transitions, 2121 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:38,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:38,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:40,830 INFO L124 PetriNetUnfolderBase]: 4491/6721 cut-off events. [2024-06-27 18:57:40,830 INFO L125 PetriNetUnfolderBase]: For 85750/85762 co-relation queries the response was YES. [2024-06-27 18:57:40,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36214 conditions, 6721 events. 4491/6721 cut-off events. For 85750/85762 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37670 event pairs, 860 based on Foata normal form. 16/6734 useless extension candidates. Maximal degree in co-relation 36144. Up to 6156 conditions per place. [2024-06-27 18:57:40,873 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 214 selfloop transitions, 37 changer transitions 0/258 dead transitions. [2024-06-27 18:57:40,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 258 transitions, 2859 flow [2024-06-27 18:57:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:57:40,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:57:40,874 INFO L175 Difference]: Start difference. First operand has 155 places, 191 transitions, 2121 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:57:40,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 258 transitions, 2859 flow [2024-06-27 18:57:40,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 258 transitions, 2705 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:40,991 INFO L231 Difference]: Finished difference. Result has 157 places, 193 transitions, 2068 flow [2024-06-27 18:57:40,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2068, PETRI_PLACES=157, PETRI_TRANSITIONS=193} [2024-06-27 18:57:40,992 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-27 18:57:40,992 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 193 transitions, 2068 flow [2024-06-27 18:57:40,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:40,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:40,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:40,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:57:40,993 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:40,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:40,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1389095345, now seen corresponding path program 4 times [2024-06-27 18:57:40,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:40,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783500399] [2024-06-27 18:57:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:40,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:44,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:44,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783500399] [2024-06-27 18:57:44,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783500399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:44,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:44,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:44,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52813967] [2024-06-27 18:57:44,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:44,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:44,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:44,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:57:44,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 193 transitions, 2068 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:44,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:44,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:57:44,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:46,024 INFO L124 PetriNetUnfolderBase]: 4238/6442 cut-off events. [2024-06-27 18:57:46,024 INFO L125 PetriNetUnfolderBase]: For 93926/94068 co-relation queries the response was YES. [2024-06-27 18:57:46,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35662 conditions, 6442 events. 4238/6442 cut-off events. For 93926/94068 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37391 event pairs, 742 based on Foata normal form. 12/6273 useless extension candidates. Maximal degree in co-relation 35591. Up to 5355 conditions per place. [2024-06-27 18:57:46,083 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 155 selfloop transitions, 68 changer transitions 0/255 dead transitions. [2024-06-27 18:57:46,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 255 transitions, 2754 flow [2024-06-27 18:57:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:57:46,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:57:46,085 INFO L175 Difference]: Start difference. First operand has 157 places, 193 transitions, 2068 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:57:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 255 transitions, 2754 flow [2024-06-27 18:57:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 255 transitions, 2673 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:46,199 INFO L231 Difference]: Finished difference. Result has 159 places, 195 transitions, 2171 flow [2024-06-27 18:57:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=159, PETRI_TRANSITIONS=195} [2024-06-27 18:57:46,200 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-27 18:57:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 195 transitions, 2171 flow [2024-06-27 18:57:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:57:46,201 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:46,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 530430095, now seen corresponding path program 2 times [2024-06-27 18:57:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:46,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466562646] [2024-06-27 18:57:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466562646] [2024-06-27 18:57:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466562646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136473844] [2024-06-27 18:57:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:49,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:49,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 195 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:49,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:49,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:49,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:51,349 INFO L124 PetriNetUnfolderBase]: 4528/6798 cut-off events. [2024-06-27 18:57:51,350 INFO L125 PetriNetUnfolderBase]: For 93233/93261 co-relation queries the response was YES. [2024-06-27 18:57:51,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37064 conditions, 6798 events. 4528/6798 cut-off events. For 93233/93261 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 38300 event pairs, 867 based on Foata normal form. 24/6818 useless extension candidates. Maximal degree in co-relation 36992. Up to 6211 conditions per place. [2024-06-27 18:57:51,401 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 216 selfloop transitions, 37 changer transitions 0/260 dead transitions. [2024-06-27 18:57:51,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 260 transitions, 2919 flow [2024-06-27 18:57:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:57:51,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:57:51,404 INFO L175 Difference]: Start difference. First operand has 159 places, 195 transitions, 2171 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:57:51,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 260 transitions, 2919 flow [2024-06-27 18:57:51,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 260 transitions, 2761 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:51,521 INFO L231 Difference]: Finished difference. Result has 161 places, 197 transitions, 2118 flow [2024-06-27 18:57:51,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2118, PETRI_PLACES=161, PETRI_TRANSITIONS=197} [2024-06-27 18:57:51,522 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 110 predicate places. [2024-06-27 18:57:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 197 transitions, 2118 flow [2024-06-27 18:57:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:51,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:57:51,523 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:51,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:51,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1555521243, now seen corresponding path program 3 times [2024-06-27 18:57:51,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:51,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299442480] [2024-06-27 18:57:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:51,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:54,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:54,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299442480] [2024-06-27 18:57:54,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299442480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:54,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:54,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:54,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859947469] [2024-06-27 18:57:54,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:54,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:54,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:54,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:54,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:54,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 197 transitions, 2118 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:54,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:54,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:56,275 INFO L124 PetriNetUnfolderBase]: 4578/6876 cut-off events. [2024-06-27 18:57:56,275 INFO L125 PetriNetUnfolderBase]: For 96445/96473 co-relation queries the response was YES. [2024-06-27 18:57:56,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37435 conditions, 6876 events. 4578/6876 cut-off events. For 96445/96473 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38767 event pairs, 879 based on Foata normal form. 24/6896 useless extension candidates. Maximal degree in co-relation 37362. Up to 6285 conditions per place. [2024-06-27 18:57:56,330 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 217 selfloop transitions, 38 changer transitions 0/262 dead transitions. [2024-06-27 18:57:56,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 262 transitions, 2874 flow [2024-06-27 18:57:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 18:57:56,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:57:56,332 INFO L175 Difference]: Start difference. First operand has 161 places, 197 transitions, 2118 flow. Second operand 8 states and 200 transitions. [2024-06-27 18:57:56,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 262 transitions, 2874 flow [2024-06-27 18:57:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 262 transitions, 2789 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:56,470 INFO L231 Difference]: Finished difference. Result has 163 places, 199 transitions, 2144 flow [2024-06-27 18:57:56,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2144, PETRI_PLACES=163, PETRI_TRANSITIONS=199} [2024-06-27 18:57:56,471 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-27 18:57:56,471 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 199 transitions, 2144 flow [2024-06-27 18:57:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:56,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:56,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:56,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:57:56,472 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:56,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1564092123, now seen corresponding path program 4 times [2024-06-27 18:57:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:56,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112617610] [2024-06-27 18:57:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112617610] [2024-06-27 18:57:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112617610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:59,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948146354] [2024-06-27 18:57:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:59,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:59,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:59,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 199 transitions, 2144 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:59,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:59,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:59,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:01,041 INFO L124 PetriNetUnfolderBase]: 4570/6862 cut-off events. [2024-06-27 18:58:01,041 INFO L125 PetriNetUnfolderBase]: For 100297/100325 co-relation queries the response was YES. [2024-06-27 18:58:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37750 conditions, 6862 events. 4570/6862 cut-off events. For 100297/100325 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38726 event pairs, 779 based on Foata normal form. 24/6882 useless extension candidates. Maximal degree in co-relation 37676. Up to 6077 conditions per place. [2024-06-27 18:58:01,104 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 214 selfloop transitions, 46 changer transitions 0/267 dead transitions. [2024-06-27 18:58:01,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 267 transitions, 2946 flow [2024-06-27 18:58:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:58:01,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:58:01,105 INFO L175 Difference]: Start difference. First operand has 163 places, 199 transitions, 2144 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:58:01,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 267 transitions, 2946 flow [2024-06-27 18:58:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 267 transitions, 2855 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:01,237 INFO L231 Difference]: Finished difference. Result has 166 places, 203 transitions, 2232 flow [2024-06-27 18:58:01,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2232, PETRI_PLACES=166, PETRI_TRANSITIONS=203} [2024-06-27 18:58:01,238 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 115 predicate places. [2024-06-27 18:58:01,238 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 203 transitions, 2232 flow [2024-06-27 18:58:01,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:01,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:01,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:58:01,239 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:01,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash 493283245, now seen corresponding path program 1 times [2024-06-27 18:58:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:01,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54433960] [2024-06-27 18:58:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:02,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54433960] [2024-06-27 18:58:02,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54433960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:02,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:02,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:02,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78329909] [2024-06-27 18:58:02,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:02,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:02,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:02,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:02,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 203 transitions, 2232 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-06-27 18:58:02,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:02,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:02,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:04,360 INFO L124 PetriNetUnfolderBase]: 4211/6702 cut-off events. [2024-06-27 18:58:04,360 INFO L125 PetriNetUnfolderBase]: For 102456/102533 co-relation queries the response was YES. [2024-06-27 18:58:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36115 conditions, 6702 events. 4211/6702 cut-off events. For 102456/102533 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 40730 event pairs, 1173 based on Foata normal form. 77/6766 useless extension candidates. Maximal degree in co-relation 36039. Up to 5909 conditions per place. [2024-06-27 18:58:04,415 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 189 selfloop transitions, 13 changer transitions 0/226 dead transitions. [2024-06-27 18:58:04,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 226 transitions, 2732 flow [2024-06-27 18:58:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:58:04,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:58:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:58:04,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:58:04,416 INFO L175 Difference]: Start difference. First operand has 166 places, 203 transitions, 2232 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:58:04,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 226 transitions, 2732 flow [2024-06-27 18:58:04,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 226 transitions, 2657 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:04,547 INFO L231 Difference]: Finished difference. Result has 167 places, 207 transitions, 2240 flow [2024-06-27 18:58:04,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2240, PETRI_PLACES=167, PETRI_TRANSITIONS=207} [2024-06-27 18:58:04,547 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 18:58:04,547 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 207 transitions, 2240 flow [2024-06-27 18:58:04,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-06-27 18:58:04,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:04,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:58:04,548 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:04,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 422895670, now seen corresponding path program 1 times [2024-06-27 18:58:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:04,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028356518] [2024-06-27 18:58:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028356518] [2024-06-27 18:58:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028356518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345638031] [2024-06-27 18:58:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:08,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:08,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:08,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:08,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 2240 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:10,498 INFO L124 PetriNetUnfolderBase]: 4894/7396 cut-off events. [2024-06-27 18:58:10,499 INFO L125 PetriNetUnfolderBase]: For 125562/125574 co-relation queries the response was YES. [2024-06-27 18:58:10,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42134 conditions, 7396 events. 4894/7396 cut-off events. For 125562/125574 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42871 event pairs, 589 based on Foata normal form. 24/7418 useless extension candidates. Maximal degree in co-relation 42056. Up to 6162 conditions per place. [2024-06-27 18:58:10,566 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 275 selfloop transitions, 31 changer transitions 0/313 dead transitions. [2024-06-27 18:58:10,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 313 transitions, 3410 flow [2024-06-27 18:58:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:58:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:58:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2024-06-27 18:58:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595744680851064 [2024-06-27 18:58:10,568 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 2240 flow. Second operand 10 states and 263 transitions. [2024-06-27 18:58:10,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 313 transitions, 3410 flow [2024-06-27 18:58:10,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 313 transitions, 3355 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:10,761 INFO L231 Difference]: Finished difference. Result has 176 places, 212 transitions, 2334 flow [2024-06-27 18:58:10,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2334, PETRI_PLACES=176, PETRI_TRANSITIONS=212} [2024-06-27 18:58:10,762 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 18:58:10,762 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 212 transitions, 2334 flow [2024-06-27 18:58:10,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:10,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:10,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:58:10,762 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:10,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 511461430, now seen corresponding path program 2 times [2024-06-27 18:58:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:10,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215963333] [2024-06-27 18:58:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215963333] [2024-06-27 18:58:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215963333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147156045] [2024-06-27 18:58:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:14,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:14,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 212 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:14,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:14,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:14,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:16,917 INFO L124 PetriNetUnfolderBase]: 5020/7594 cut-off events. [2024-06-27 18:58:16,917 INFO L125 PetriNetUnfolderBase]: For 134159/134171 co-relation queries the response was YES. [2024-06-27 18:58:16,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43896 conditions, 7594 events. 5020/7594 cut-off events. For 134159/134171 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44260 event pairs, 880 based on Foata normal form. 24/7616 useless extension candidates. Maximal degree in co-relation 43815. Up to 6532 conditions per place. [2024-06-27 18:58:16,971 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 267 selfloop transitions, 29 changer transitions 0/303 dead transitions. [2024-06-27 18:58:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 303 transitions, 3421 flow [2024-06-27 18:58:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:58:16,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-06-27 18:58:16,973 INFO L175 Difference]: Start difference. First operand has 176 places, 212 transitions, 2334 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:58:16,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 303 transitions, 3421 flow [2024-06-27 18:58:17,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 303 transitions, 3361 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:17,174 INFO L231 Difference]: Finished difference. Result has 181 places, 215 transitions, 2393 flow [2024-06-27 18:58:17,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2393, PETRI_PLACES=181, PETRI_TRANSITIONS=215} [2024-06-27 18:58:17,175 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 130 predicate places. [2024-06-27 18:58:17,175 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 215 transitions, 2393 flow [2024-06-27 18:58:17,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:17,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:17,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:58:17,175 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:17,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash 511609300, now seen corresponding path program 3 times [2024-06-27 18:58:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020157530] [2024-06-27 18:58:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:21,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:21,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020157530] [2024-06-27 18:58:21,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020157530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:21,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:21,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448812828] [2024-06-27 18:58:21,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:21,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:21,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:21,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:21,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:21,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:21,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 215 transitions, 2393 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:21,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:21,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:21,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:23,400 INFO L124 PetriNetUnfolderBase]: 4992/7550 cut-off events. [2024-06-27 18:58:23,401 INFO L125 PetriNetUnfolderBase]: For 132344/132356 co-relation queries the response was YES. [2024-06-27 18:58:23,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43444 conditions, 7550 events. 4992/7550 cut-off events. For 132344/132356 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 43889 event pairs, 908 based on Foata normal form. 28/7576 useless extension candidates. Maximal degree in co-relation 43360. Up to 6756 conditions per place. [2024-06-27 18:58:23,465 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 263 selfloop transitions, 29 changer transitions 0/299 dead transitions. [2024-06-27 18:58:23,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 299 transitions, 3305 flow [2024-06-27 18:58:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:58:23,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:58:23,467 INFO L175 Difference]: Start difference. First operand has 181 places, 215 transitions, 2393 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:58:23,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 299 transitions, 3305 flow [2024-06-27 18:58:23,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 299 transitions, 3247 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:23,713 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 2422 flow [2024-06-27 18:58:23,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2422, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-27 18:58:23,713 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 134 predicate places. [2024-06-27 18:58:23,713 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 2422 flow [2024-06-27 18:58:23,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:23,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:23,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:23,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:58:23,714 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:23,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1029181252, now seen corresponding path program 4 times [2024-06-27 18:58:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240382131] [2024-06-27 18:58:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:27,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:27,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240382131] [2024-06-27 18:58:27,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240382131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:27,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:27,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:27,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620625207] [2024-06-27 18:58:27,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:27,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:27,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:27,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:27,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 2422 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:27,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:27,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:30,471 INFO L124 PetriNetUnfolderBase]: 5168/7810 cut-off events. [2024-06-27 18:58:30,471 INFO L125 PetriNetUnfolderBase]: For 138537/138539 co-relation queries the response was YES. [2024-06-27 18:58:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44883 conditions, 7810 events. 5168/7810 cut-off events. For 138537/138539 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 45671 event pairs, 951 based on Foata normal form. 16/7823 useless extension candidates. Maximal degree in co-relation 44797. Up to 6694 conditions per place. [2024-06-27 18:58:30,533 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 222 selfloop transitions, 65 changer transitions 0/294 dead transitions. [2024-06-27 18:58:30,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 294 transitions, 3296 flow [2024-06-27 18:58:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:58:30,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:58:30,534 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 2422 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:58:30,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 294 transitions, 3296 flow [2024-06-27 18:58:30,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 294 transitions, 3241 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:30,780 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2524 flow [2024-06-27 18:58:30,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2524, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-27 18:58:30,781 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 136 predicate places. [2024-06-27 18:58:30,781 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2524 flow [2024-06-27 18:58:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:30,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:30,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:30,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:58:30,782 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:30,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1023818872, now seen corresponding path program 5 times [2024-06-27 18:58:30,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:30,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381083059] [2024-06-27 18:58:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:30,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:34,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:34,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381083059] [2024-06-27 18:58:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381083059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:34,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:34,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462261240] [2024-06-27 18:58:34,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:34,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:34,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:34,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:34,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:34,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:34,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:36,873 INFO L124 PetriNetUnfolderBase]: 5344/8106 cut-off events. [2024-06-27 18:58:36,874 INFO L125 PetriNetUnfolderBase]: For 149281/149283 co-relation queries the response was YES. [2024-06-27 18:58:36,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46999 conditions, 8106 events. 5344/8106 cut-off events. For 149281/149283 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 47892 event pairs, 987 based on Foata normal form. 16/8119 useless extension candidates. Maximal degree in co-relation 46912. Up to 6966 conditions per place. [2024-06-27 18:58:36,944 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 225 selfloop transitions, 63 changer transitions 0/295 dead transitions. [2024-06-27 18:58:36,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 295 transitions, 3402 flow [2024-06-27 18:58:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:58:36,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:58:36,946 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2524 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:58:36,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 295 transitions, 3402 flow [2024-06-27 18:58:37,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 295 transitions, 3265 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:37,179 INFO L231 Difference]: Finished difference. Result has 189 places, 218 transitions, 2542 flow [2024-06-27 18:58:37,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2542, PETRI_PLACES=189, PETRI_TRANSITIONS=218} [2024-06-27 18:58:37,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 138 predicate places. [2024-06-27 18:58:37,180 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 218 transitions, 2542 flow [2024-06-27 18:58:37,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:37,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:37,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:37,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:58:37,180 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:37,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:37,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1023671002, now seen corresponding path program 6 times [2024-06-27 18:58:37,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:37,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172655933] [2024-06-27 18:58:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:37,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:40,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:40,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172655933] [2024-06-27 18:58:40,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172655933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:40,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:40,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:40,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813503478] [2024-06-27 18:58:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:40,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:40,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:40,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 218 transitions, 2542 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:40,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:40,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:40,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:43,037 INFO L124 PetriNetUnfolderBase]: 5470/8304 cut-off events. [2024-06-27 18:58:43,037 INFO L125 PetriNetUnfolderBase]: For 154176/154178 co-relation queries the response was YES. [2024-06-27 18:58:43,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48017 conditions, 8304 events. 5470/8304 cut-off events. For 154176/154178 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49398 event pairs, 967 based on Foata normal form. 12/8313 useless extension candidates. Maximal degree in co-relation 47929. Up to 6712 conditions per place. [2024-06-27 18:58:43,113 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 228 selfloop transitions, 66 changer transitions 0/301 dead transitions. [2024-06-27 18:58:43,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 3476 flow [2024-06-27 18:58:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:58:43,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:58:43,115 INFO L175 Difference]: Start difference. First operand has 189 places, 218 transitions, 2542 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:58:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 3476 flow [2024-06-27 18:58:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 301 transitions, 3341 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:43,329 INFO L231 Difference]: Finished difference. Result has 192 places, 221 transitions, 2608 flow [2024-06-27 18:58:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2407, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=192, PETRI_TRANSITIONS=221} [2024-06-27 18:58:43,330 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 141 predicate places. [2024-06-27 18:58:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 221 transitions, 2608 flow [2024-06-27 18:58:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:43,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:58:43,331 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -203754144, now seen corresponding path program 1 times [2024-06-27 18:58:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:43,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413907683] [2024-06-27 18:58:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:43,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:47,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:47,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413907683] [2024-06-27 18:58:47,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413907683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:47,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:47,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:47,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174029022] [2024-06-27 18:58:47,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:47,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:47,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:47,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 221 transitions, 2608 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:47,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:47,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:47,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:49,653 INFO L124 PetriNetUnfolderBase]: 5596/8502 cut-off events. [2024-06-27 18:58:49,653 INFO L125 PetriNetUnfolderBase]: For 162645/162647 co-relation queries the response was YES. [2024-06-27 18:58:49,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49384 conditions, 8502 events. 5596/8502 cut-off events. For 162645/162647 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 50802 event pairs, 983 based on Foata normal form. 12/8511 useless extension candidates. Maximal degree in co-relation 49294. Up to 6678 conditions per place. [2024-06-27 18:58:49,737 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 226 selfloop transitions, 69 changer transitions 0/302 dead transitions. [2024-06-27 18:58:49,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 302 transitions, 3522 flow [2024-06-27 18:58:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:49,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:58:49,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-06-27 18:58:49,739 INFO L175 Difference]: Start difference. First operand has 192 places, 221 transitions, 2608 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:58:49,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 302 transitions, 3522 flow [2024-06-27 18:58:50,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 302 transitions, 3423 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:50,114 INFO L231 Difference]: Finished difference. Result has 196 places, 222 transitions, 2679 flow [2024-06-27 18:58:50,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2679, PETRI_PLACES=196, PETRI_TRANSITIONS=222} [2024-06-27 18:58:50,115 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 145 predicate places. [2024-06-27 18:58:50,115 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 222 transitions, 2679 flow [2024-06-27 18:58:50,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:50,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:50,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:58:50,115 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:50,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1859913620, now seen corresponding path program 7 times [2024-06-27 18:58:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:50,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892125421] [2024-06-27 18:58:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:53,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892125421] [2024-06-27 18:58:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892125421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:53,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:53,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259882053] [2024-06-27 18:58:53,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:53,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:53,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:53,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 222 transitions, 2679 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:53,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:53,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:53,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:56,390 INFO L124 PetriNetUnfolderBase]: 5772/8830 cut-off events. [2024-06-27 18:58:56,391 INFO L125 PetriNetUnfolderBase]: For 174546/174563 co-relation queries the response was YES. [2024-06-27 18:58:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51703 conditions, 8830 events. 5772/8830 cut-off events. For 174546/174563 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 53733 event pairs, 1089 based on Foata normal form. 20/8843 useless extension candidates. Maximal degree in co-relation 51611. Up to 7634 conditions per place. [2024-06-27 18:58:56,492 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 227 selfloop transitions, 64 changer transitions 0/298 dead transitions. [2024-06-27 18:58:56,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 298 transitions, 3573 flow [2024-06-27 18:58:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-27 18:58:56,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5460992907801419 [2024-06-27 18:58:56,494 INFO L175 Difference]: Start difference. First operand has 196 places, 222 transitions, 2679 flow. Second operand 9 states and 231 transitions. [2024-06-27 18:58:56,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 298 transitions, 3573 flow [2024-06-27 18:58:56,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 298 transitions, 3419 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:56,860 INFO L231 Difference]: Finished difference. Result has 198 places, 223 transitions, 2688 flow [2024-06-27 18:58:56,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2688, PETRI_PLACES=198, PETRI_TRANSITIONS=223} [2024-06-27 18:58:56,861 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-27 18:58:56,861 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 223 transitions, 2688 flow [2024-06-27 18:58:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:56,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:56,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:56,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:58:56,861 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:56,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash 976304544, now seen corresponding path program 8 times [2024-06-27 18:58:56,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:56,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170545997] [2024-06-27 18:58:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:56,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170545997] [2024-06-27 18:59:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170545997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:00,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:00,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:00,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010379308] [2024-06-27 18:59:00,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:00,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:00,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:00,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:00,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:00,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 223 transitions, 2688 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:00,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:00,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:00,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:02,860 INFO L124 PetriNetUnfolderBase]: 5948/9082 cut-off events. [2024-06-27 18:59:02,860 INFO L125 PetriNetUnfolderBase]: For 183788/183805 co-relation queries the response was YES. [2024-06-27 18:59:02,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53041 conditions, 9082 events. 5948/9082 cut-off events. For 183788/183805 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55579 event pairs, 1103 based on Foata normal form. 20/9095 useless extension candidates. Maximal degree in co-relation 52948. Up to 7906 conditions per place. [2024-06-27 18:59:02,956 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 225 selfloop transitions, 67 changer transitions 0/299 dead transitions. [2024-06-27 18:59:02,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 299 transitions, 3586 flow [2024-06-27 18:59:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 18:59:02,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-27 18:59:02,958 INFO L175 Difference]: Start difference. First operand has 198 places, 223 transitions, 2688 flow. Second operand 9 states and 230 transitions. [2024-06-27 18:59:02,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 299 transitions, 3586 flow [2024-06-27 18:59:03,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 299 transitions, 3443 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:03,289 INFO L231 Difference]: Finished difference. Result has 200 places, 224 transitions, 2716 flow [2024-06-27 18:59:03,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2716, PETRI_PLACES=200, PETRI_TRANSITIONS=224} [2024-06-27 18:59:03,290 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2024-06-27 18:59:03,290 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 224 transitions, 2716 flow [2024-06-27 18:59:03,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:03,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:03,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:03,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:59:03,290 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:03,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1793663810, now seen corresponding path program 9 times [2024-06-27 18:59:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:03,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533502021] [2024-06-27 18:59:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533502021] [2024-06-27 18:59:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533502021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:06,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677821962] [2024-06-27 18:59:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:06,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:06,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:06,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:06,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 224 transitions, 2716 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:06,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:09,350 INFO L124 PetriNetUnfolderBase]: 6124/9426 cut-off events. [2024-06-27 18:59:09,350 INFO L125 PetriNetUnfolderBase]: For 194055/194072 co-relation queries the response was YES. [2024-06-27 18:59:09,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54647 conditions, 9426 events. 6124/9426 cut-off events. For 194055/194072 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 58478 event pairs, 1177 based on Foata normal form. 20/9439 useless extension candidates. Maximal degree in co-relation 54553. Up to 8178 conditions per place. [2024-06-27 18:59:09,454 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 230 selfloop transitions, 63 changer transitions 0/300 dead transitions. [2024-06-27 18:59:09,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 300 transitions, 3618 flow [2024-06-27 18:59:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:59:09,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:59:09,455 INFO L175 Difference]: Start difference. First operand has 200 places, 224 transitions, 2716 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:59:09,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 300 transitions, 3618 flow [2024-06-27 18:59:09,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 300 transitions, 3467 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:09,914 INFO L231 Difference]: Finished difference. Result has 202 places, 225 transitions, 2730 flow [2024-06-27 18:59:09,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2730, PETRI_PLACES=202, PETRI_TRANSITIONS=225} [2024-06-27 18:59:09,915 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-27 18:59:09,915 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 225 transitions, 2730 flow [2024-06-27 18:59:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:09,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:09,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:09,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:59:09,916 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:09,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:09,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1799174060, now seen corresponding path program 10 times [2024-06-27 18:59:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:09,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562164800] [2024-06-27 18:59:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:13,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:13,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562164800] [2024-06-27 18:59:13,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562164800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:13,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:13,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154251351] [2024-06-27 18:59:13,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:13,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:13,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:13,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:13,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 225 transitions, 2730 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:13,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:13,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:16,235 INFO L124 PetriNetUnfolderBase]: 6192/9502 cut-off events. [2024-06-27 18:59:16,235 INFO L125 PetriNetUnfolderBase]: For 193804/193821 co-relation queries the response was YES. [2024-06-27 18:59:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54775 conditions, 9502 events. 6192/9502 cut-off events. For 193804/193821 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 58772 event pairs, 1121 based on Foata normal form. 16/9511 useless extension candidates. Maximal degree in co-relation 54680. Up to 7606 conditions per place. [2024-06-27 18:59:16,313 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 231 selfloop transitions, 68 changer transitions 0/306 dead transitions. [2024-06-27 18:59:16,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 306 transitions, 3698 flow [2024-06-27 18:59:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:16,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:59:16,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:59:16,315 INFO L175 Difference]: Start difference. First operand has 202 places, 225 transitions, 2730 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:59:16,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 306 transitions, 3698 flow [2024-06-27 18:59:16,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 306 transitions, 3553 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:16,652 INFO L231 Difference]: Finished difference. Result has 205 places, 228 transitions, 2813 flow [2024-06-27 18:59:16,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2813, PETRI_PLACES=205, PETRI_TRANSITIONS=228} [2024-06-27 18:59:16,653 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2024-06-27 18:59:16,653 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 228 transitions, 2813 flow [2024-06-27 18:59:16,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:59:16,653 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:16,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1916471556, now seen corresponding path program 2 times [2024-06-27 18:59:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067764936] [2024-06-27 18:59:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:19,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067764936] [2024-06-27 18:59:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067764936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:19,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:19,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731963818] [2024-06-27 18:59:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:19,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 228 transitions, 2813 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:19,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:19,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:22,695 INFO L124 PetriNetUnfolderBase]: 6318/9700 cut-off events. [2024-06-27 18:59:22,695 INFO L125 PetriNetUnfolderBase]: For 202093/202110 co-relation queries the response was YES. [2024-06-27 18:59:22,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56164 conditions, 9700 events. 6318/9700 cut-off events. For 202093/202110 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 60276 event pairs, 1149 based on Foata normal form. 16/9709 useless extension candidates. Maximal degree in co-relation 56067. Up to 8268 conditions per place. [2024-06-27 18:59:22,785 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 231 selfloop transitions, 69 changer transitions 0/307 dead transitions. [2024-06-27 18:59:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 307 transitions, 3751 flow [2024-06-27 18:59:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:59:22,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:59:22,788 INFO L175 Difference]: Start difference. First operand has 205 places, 228 transitions, 2813 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:59:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 307 transitions, 3751 flow [2024-06-27 18:59:23,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 307 transitions, 3632 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:59:23,167 INFO L231 Difference]: Finished difference. Result has 209 places, 229 transitions, 2874 flow [2024-06-27 18:59:23,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=209, PETRI_TRANSITIONS=229} [2024-06-27 18:59:23,167 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-27 18:59:23,168 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 229 transitions, 2874 flow [2024-06-27 18:59:23,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:23,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:23,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:59:23,168 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:23,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1793448608, now seen corresponding path program 3 times [2024-06-27 18:59:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351564169] [2024-06-27 18:59:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:26,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351564169] [2024-06-27 18:59:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351564169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:26,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:26,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920368699] [2024-06-27 18:59:26,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:26,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:26,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 229 transitions, 2874 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:26,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:26,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:29,520 INFO L124 PetriNetUnfolderBase]: 6444/9978 cut-off events. [2024-06-27 18:59:29,521 INFO L125 PetriNetUnfolderBase]: For 210622/210639 co-relation queries the response was YES. [2024-06-27 18:59:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57833 conditions, 9978 events. 6444/9978 cut-off events. For 210622/210639 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 63081 event pairs, 1241 based on Foata normal form. 16/9987 useless extension candidates. Maximal degree in co-relation 57734. Up to 8234 conditions per place. [2024-06-27 18:59:29,638 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 235 selfloop transitions, 66 changer transitions 0/308 dead transitions. [2024-06-27 18:59:29,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 3816 flow [2024-06-27 18:59:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:59:29,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:59:29,640 INFO L175 Difference]: Start difference. First operand has 209 places, 229 transitions, 2874 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:59:29,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 3816 flow [2024-06-27 18:59:30,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 308 transitions, 3652 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:30,092 INFO L231 Difference]: Finished difference. Result has 211 places, 230 transitions, 2886 flow [2024-06-27 18:59:30,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2886, PETRI_PLACES=211, PETRI_TRANSITIONS=230} [2024-06-27 18:59:30,093 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-27 18:59:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 230 transitions, 2886 flow [2024-06-27 18:59:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:30,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:30,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:59:30,093 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:30,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1242217026, now seen corresponding path program 4 times [2024-06-27 18:59:30,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688427322] [2024-06-27 18:59:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:33,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:33,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688427322] [2024-06-27 18:59:33,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688427322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:33,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:33,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:59:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745654347] [2024-06-27 18:59:33,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:33,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:59:33,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:59:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:59:33,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:33,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 230 transitions, 2886 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:33,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:33,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:36,027 INFO L124 PetriNetUnfolderBase]: 6424/9890 cut-off events. [2024-06-27 18:59:36,027 INFO L125 PetriNetUnfolderBase]: For 201257/201274 co-relation queries the response was YES. [2024-06-27 18:59:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56669 conditions, 9890 events. 6424/9890 cut-off events. For 201257/201274 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 61693 event pairs, 1024 based on Foata normal form. 16/9899 useless extension candidates. Maximal degree in co-relation 56569. Up to 6556 conditions per place. [2024-06-27 18:59:36,134 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 219 selfloop transitions, 82 changer transitions 0/308 dead transitions. [2024-06-27 18:59:36,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 308 transitions, 3708 flow [2024-06-27 18:59:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:59:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:59:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:59:36,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:59:36,136 INFO L175 Difference]: Start difference. First operand has 211 places, 230 transitions, 2886 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:59:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 308 transitions, 3708 flow [2024-06-27 18:59:36,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 308 transitions, 3548 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:36,621 INFO L231 Difference]: Finished difference. Result has 212 places, 229 transitions, 2808 flow [2024-06-27 18:59:36,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2808, PETRI_PLACES=212, PETRI_TRANSITIONS=229} [2024-06-27 18:59:36,621 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 161 predicate places. [2024-06-27 18:59:36,621 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 229 transitions, 2808 flow [2024-06-27 18:59:36,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:36,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:36,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:36,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:59:36,622 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:36,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1280180396, now seen corresponding path program 1 times [2024-06-27 18:59:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:36,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204458964] [2024-06-27 18:59:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:39,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204458964] [2024-06-27 18:59:39,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204458964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:39,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:39,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131871011] [2024-06-27 18:59:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:39,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:39,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:39,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:39,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:39,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 229 transitions, 2808 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:39,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:39,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:39,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:41,657 INFO L124 PetriNetUnfolderBase]: 6312/9892 cut-off events. [2024-06-27 18:59:41,657 INFO L125 PetriNetUnfolderBase]: For 193313/193414 co-relation queries the response was YES. [2024-06-27 18:59:41,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55926 conditions, 9892 events. 6312/9892 cut-off events. For 193313/193414 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63967 event pairs, 1226 based on Foata normal form. 101/9922 useless extension candidates. Maximal degree in co-relation 55825. Up to 8643 conditions per place. [2024-06-27 18:59:41,765 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 221 selfloop transitions, 68 changer transitions 0/313 dead transitions. [2024-06-27 18:59:41,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 313 transitions, 3958 flow [2024-06-27 18:59:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:59:41,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:59:41,766 INFO L175 Difference]: Start difference. First operand has 212 places, 229 transitions, 2808 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:59:41,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 313 transitions, 3958 flow [2024-06-27 18:59:42,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 313 transitions, 3614 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-27 18:59:42,272 INFO L231 Difference]: Finished difference. Result has 210 places, 262 transitions, 2976 flow [2024-06-27 18:59:42,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2472, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2976, PETRI_PLACES=210, PETRI_TRANSITIONS=262} [2024-06-27 18:59:42,272 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-06-27 18:59:42,273 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 262 transitions, 2976 flow [2024-06-27 18:59:42,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:42,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:42,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:42,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:59:42,273 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:42,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:42,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1840831222, now seen corresponding path program 2 times [2024-06-27 18:59:42,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:42,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268006515] [2024-06-27 18:59:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:44,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268006515] [2024-06-27 18:59:44,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268006515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:44,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:44,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:44,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061015858] [2024-06-27 18:59:44,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:44,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:44,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:44,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 262 transitions, 2976 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:44,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:44,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:44,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:46,956 INFO L124 PetriNetUnfolderBase]: 6289/9831 cut-off events. [2024-06-27 18:59:46,957 INFO L125 PetriNetUnfolderBase]: For 183872/183993 co-relation queries the response was YES. [2024-06-27 18:59:47,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53191 conditions, 9831 events. 6289/9831 cut-off events. For 183872/183993 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 63387 event pairs, 1261 based on Foata normal form. 110/9841 useless extension candidates. Maximal degree in co-relation 53092. Up to 8521 conditions per place. [2024-06-27 18:59:47,069 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 197 selfloop transitions, 78 changer transitions 0/299 dead transitions. [2024-06-27 18:59:47,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 299 transitions, 3798 flow [2024-06-27 18:59:47,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:47,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:59:47,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 18:59:47,070 INFO L175 Difference]: Start difference. First operand has 210 places, 262 transitions, 2976 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:59:47,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 299 transitions, 3798 flow [2024-06-27 18:59:47,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 299 transitions, 3753 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:47,507 INFO L231 Difference]: Finished difference. Result has 215 places, 268 transitions, 3217 flow [2024-06-27 18:59:47,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3217, PETRI_PLACES=215, PETRI_TRANSITIONS=268} [2024-06-27 18:59:47,507 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 164 predicate places. [2024-06-27 18:59:47,508 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 268 transitions, 3217 flow [2024-06-27 18:59:47,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:47,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:47,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:47,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:59:47,508 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:47,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1534260618, now seen corresponding path program 3 times [2024-06-27 18:59:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:47,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552362685] [2024-06-27 18:59:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:47,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552362685] [2024-06-27 18:59:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552362685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:50,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302568419] [2024-06-27 18:59:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:50,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:50,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:50,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 268 transitions, 3217 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:50,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:50,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:50,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:52,131 INFO L124 PetriNetUnfolderBase]: 6280/9830 cut-off events. [2024-06-27 18:59:52,131 INFO L125 PetriNetUnfolderBase]: For 192100/192201 co-relation queries the response was YES. [2024-06-27 18:59:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55004 conditions, 9830 events. 6280/9830 cut-off events. For 192100/192201 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63488 event pairs, 1244 based on Foata normal form. 97/9836 useless extension candidates. Maximal degree in co-relation 54902. Up to 8621 conditions per place. [2024-06-27 18:59:52,253 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 213 selfloop transitions, 66 changer transitions 0/303 dead transitions. [2024-06-27 18:59:52,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 303 transitions, 3885 flow [2024-06-27 18:59:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:59:52,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:59:52,255 INFO L175 Difference]: Start difference. First operand has 215 places, 268 transitions, 3217 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:59:52,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 303 transitions, 3885 flow [2024-06-27 18:59:53,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 303 transitions, 3786 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:53,026 INFO L231 Difference]: Finished difference. Result has 219 places, 268 transitions, 3282 flow [2024-06-27 18:59:53,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3282, PETRI_PLACES=219, PETRI_TRANSITIONS=268} [2024-06-27 18:59:53,027 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 168 predicate places. [2024-06-27 18:59:53,027 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 268 transitions, 3282 flow [2024-06-27 18:59:53,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:53,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:53,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:59:53,027 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:53,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -759659462, now seen corresponding path program 1 times [2024-06-27 18:59:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:53,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515165266] [2024-06-27 18:59:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:55,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515165266] [2024-06-27 18:59:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515165266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:55,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:55,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:55,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083775779] [2024-06-27 18:59:55,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:55,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:55,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:55,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:55,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:55,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 268 transitions, 3282 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:55,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:55,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:55,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:57,682 INFO L124 PetriNetUnfolderBase]: 6739/10716 cut-off events. [2024-06-27 18:59:57,682 INFO L125 PetriNetUnfolderBase]: For 201106/201108 co-relation queries the response was YES. [2024-06-27 18:59:57,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59360 conditions, 10716 events. 6739/10716 cut-off events. For 201106/201108 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70911 event pairs, 1757 based on Foata normal form. 1/10715 useless extension candidates. Maximal degree in co-relation 59256. Up to 9768 conditions per place. [2024-06-27 18:59:57,800 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 278 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-27 18:59:57,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4236 flow [2024-06-27 18:59:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 18:59:57,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 18:59:57,801 INFO L175 Difference]: Start difference. First operand has 219 places, 268 transitions, 3282 flow. Second operand 7 states and 166 transitions. [2024-06-27 18:59:57,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4236 flow [2024-06-27 18:59:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 313 transitions, 4088 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:59:58,283 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3345 flow [2024-06-27 18:59:58,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3345, PETRI_PLACES=221, PETRI_TRANSITIONS=276} [2024-06-27 18:59:58,284 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 170 predicate places. [2024-06-27 18:59:58,284 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3345 flow [2024-06-27 18:59:58,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:58,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:58,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:58,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:59:58,284 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:58,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1421466702, now seen corresponding path program 1 times [2024-06-27 18:59:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:58,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657718554] [2024-06-27 18:59:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:00,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:00,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657718554] [2024-06-27 19:00:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657718554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:00,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947269396] [2024-06-27 19:00:00,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:00,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:00,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 276 transitions, 3345 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:00,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:00,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:00,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:03,082 INFO L124 PetriNetUnfolderBase]: 6793/10740 cut-off events. [2024-06-27 19:00:03,083 INFO L125 PetriNetUnfolderBase]: For 212146/212148 co-relation queries the response was YES. [2024-06-27 19:00:03,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60428 conditions, 10740 events. 6793/10740 cut-off events. For 212146/212148 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70367 event pairs, 1745 based on Foata normal form. 2/10740 useless extension candidates. Maximal degree in co-relation 60323. Up to 9796 conditions per place. [2024-06-27 19:00:03,225 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 286 selfloop transitions, 31 changer transitions 0/324 dead transitions. [2024-06-27 19:00:03,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 4358 flow [2024-06-27 19:00:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:00:03,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 19:00:03,227 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3345 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:00:03,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 4358 flow [2024-06-27 19:00:03,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 324 transitions, 4255 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:03,781 INFO L231 Difference]: Finished difference. Result has 226 places, 288 transitions, 3507 flow [2024-06-27 19:00:03,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3507, PETRI_PLACES=226, PETRI_TRANSITIONS=288} [2024-06-27 19:00:03,782 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 175 predicate places. [2024-06-27 19:00:03,782 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 288 transitions, 3507 flow [2024-06-27 19:00:03,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:03,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:03,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:03,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:00:03,782 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:03,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:03,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1421466516, now seen corresponding path program 2 times [2024-06-27 19:00:03,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:03,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586701713] [2024-06-27 19:00:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:03,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:05,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:05,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586701713] [2024-06-27 19:00:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586701713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:05,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137537178] [2024-06-27 19:00:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:05,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:05,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 288 transitions, 3507 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:05,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:05,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:05,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:08,640 INFO L124 PetriNetUnfolderBase]: 6811/10774 cut-off events. [2024-06-27 19:00:08,640 INFO L125 PetriNetUnfolderBase]: For 221246/221248 co-relation queries the response was YES. [2024-06-27 19:00:08,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61549 conditions, 10774 events. 6811/10774 cut-off events. For 221246/221248 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70853 event pairs, 1754 based on Foata normal form. 1/10773 useless extension candidates. Maximal degree in co-relation 61441. Up to 9890 conditions per place. [2024-06-27 19:00:08,738 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 292 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-27 19:00:08,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 324 transitions, 4293 flow [2024-06-27 19:00:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:00:08,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48632218844984804 [2024-06-27 19:00:08,740 INFO L175 Difference]: Start difference. First operand has 226 places, 288 transitions, 3507 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:00:08,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 324 transitions, 4293 flow [2024-06-27 19:00:09,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 4200 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-27 19:00:09,253 INFO L231 Difference]: Finished difference. Result has 231 places, 292 transitions, 3539 flow [2024-06-27 19:00:09,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3539, PETRI_PLACES=231, PETRI_TRANSITIONS=292} [2024-06-27 19:00:09,254 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-06-27 19:00:09,254 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 292 transitions, 3539 flow [2024-06-27 19:00:09,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:09,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:09,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:09,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:00:09,254 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:09,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:09,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1841062420, now seen corresponding path program 2 times [2024-06-27 19:00:09,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:09,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955426738] [2024-06-27 19:00:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:09,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955426738] [2024-06-27 19:00:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955426738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:11,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:11,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:11,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301371959] [2024-06-27 19:00:11,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:11,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:11,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:11,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 292 transitions, 3539 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:11,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:11,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:13,926 INFO L124 PetriNetUnfolderBase]: 6847/10818 cut-off events. [2024-06-27 19:00:13,926 INFO L125 PetriNetUnfolderBase]: For 227473/227475 co-relation queries the response was YES. [2024-06-27 19:00:14,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61810 conditions, 10818 events. 6847/10818 cut-off events. For 227473/227475 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70885 event pairs, 1744 based on Foata normal form. 2/10818 useless extension candidates. Maximal degree in co-relation 61700. Up to 9852 conditions per place. [2024-06-27 19:00:14,046 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-27 19:00:14,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4429 flow [2024-06-27 19:00:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:00:14,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 19:00:14,047 INFO L175 Difference]: Start difference. First operand has 231 places, 292 transitions, 3539 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:00:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4429 flow [2024-06-27 19:00:14,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 327 transitions, 4330 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:14,616 INFO L231 Difference]: Finished difference. Result has 231 places, 296 transitions, 3584 flow [2024-06-27 19:00:14,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3584, PETRI_PLACES=231, PETRI_TRANSITIONS=296} [2024-06-27 19:00:14,617 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-06-27 19:00:14,617 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 296 transitions, 3584 flow [2024-06-27 19:00:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:14,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:14,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:00:14,617 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:14,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1841062606, now seen corresponding path program 3 times [2024-06-27 19:00:14,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:14,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137872885] [2024-06-27 19:00:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:14,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:16,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137872885] [2024-06-27 19:00:16,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137872885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:16,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:16,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314601625] [2024-06-27 19:00:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:16,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:16,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:16,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:16,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:16,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 296 transitions, 3584 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:16,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:16,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:16,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:19,188 INFO L124 PetriNetUnfolderBase]: 6844/10818 cut-off events. [2024-06-27 19:00:19,188 INFO L125 PetriNetUnfolderBase]: For 230515/230517 co-relation queries the response was YES. [2024-06-27 19:00:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61886 conditions, 10818 events. 6844/10818 cut-off events. For 230515/230517 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 71074 event pairs, 1760 based on Foata normal form. 1/10817 useless extension candidates. Maximal degree in co-relation 61776. Up to 9904 conditions per place. [2024-06-27 19:00:19,336 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 288 selfloop transitions, 32 changer transitions 0/327 dead transitions. [2024-06-27 19:00:19,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 4314 flow [2024-06-27 19:00:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:00:19,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 19:00:19,337 INFO L175 Difference]: Start difference. First operand has 231 places, 296 transitions, 3584 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:00:19,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 4314 flow [2024-06-27 19:00:19,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 327 transitions, 4187 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:19,999 INFO L231 Difference]: Finished difference. Result has 233 places, 296 transitions, 3538 flow [2024-06-27 19:00:19,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3538, PETRI_PLACES=233, PETRI_TRANSITIONS=296} [2024-06-27 19:00:20,000 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 182 predicate places. [2024-06-27 19:00:20,000 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 296 transitions, 3538 flow [2024-06-27 19:00:20,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:20,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:20,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:20,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:00:20,000 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:20,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1840825270, now seen corresponding path program 3 times [2024-06-27 19:00:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:20,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004177201] [2024-06-27 19:00:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004177201] [2024-06-27 19:00:22,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004177201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:22,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:22,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642850581] [2024-06-27 19:00:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:22,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:22,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:22,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:22,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 296 transitions, 3538 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:22,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:22,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:22,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:24,544 INFO L124 PetriNetUnfolderBase]: 6838/10811 cut-off events. [2024-06-27 19:00:24,544 INFO L125 PetriNetUnfolderBase]: For 229603/229607 co-relation queries the response was YES. [2024-06-27 19:00:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61471 conditions, 10811 events. 6838/10811 cut-off events. For 229603/229607 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70934 event pairs, 1752 based on Foata normal form. 4/10813 useless extension candidates. Maximal degree in co-relation 61361. Up to 9843 conditions per place. [2024-06-27 19:00:24,655 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 280 selfloop transitions, 34 changer transitions 0/321 dead transitions. [2024-06-27 19:00:24,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 321 transitions, 4236 flow [2024-06-27 19:00:24,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 19:00:24,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929078014184397 [2024-06-27 19:00:24,656 INFO L175 Difference]: Start difference. First operand has 233 places, 296 transitions, 3538 flow. Second operand 6 states and 139 transitions. [2024-06-27 19:00:24,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 321 transitions, 4236 flow [2024-06-27 19:00:25,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 4142 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:25,174 INFO L231 Difference]: Finished difference. Result has 234 places, 296 transitions, 3519 flow [2024-06-27 19:00:25,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3519, PETRI_PLACES=234, PETRI_TRANSITIONS=296} [2024-06-27 19:00:25,174 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 183 predicate places. [2024-06-27 19:00:25,174 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 296 transitions, 3519 flow [2024-06-27 19:00:25,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:25,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:25,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:25,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:00:25,175 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:25,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1840816342, now seen corresponding path program 1 times [2024-06-27 19:00:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:25,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83336261] [2024-06-27 19:00:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:28,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83336261] [2024-06-27 19:00:28,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83336261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:28,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:28,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547540923] [2024-06-27 19:00:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:28,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:00:28,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 296 transitions, 3519 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:28,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:28,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:00:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:30,990 INFO L124 PetriNetUnfolderBase]: 6370/10168 cut-off events. [2024-06-27 19:00:30,991 INFO L125 PetriNetUnfolderBase]: For 219423/219530 co-relation queries the response was YES. [2024-06-27 19:00:31,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57969 conditions, 10168 events. 6370/10168 cut-off events. For 219423/219530 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 67489 event pairs, 1634 based on Foata normal form. 101/10184 useless extension candidates. Maximal degree in co-relation 57858. Up to 9149 conditions per place. [2024-06-27 19:00:31,117 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 284 selfloop transitions, 16 changer transitions 0/324 dead transitions. [2024-06-27 19:00:31,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 324 transitions, 4249 flow [2024-06-27 19:00:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:31,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:00:31,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:00:31,118 INFO L175 Difference]: Start difference. First operand has 234 places, 296 transitions, 3519 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:00:31,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 324 transitions, 4249 flow [2024-06-27 19:00:31,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 324 transitions, 4150 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:31,690 INFO L231 Difference]: Finished difference. Result has 235 places, 299 transitions, 3524 flow [2024-06-27 19:00:31,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3524, PETRI_PLACES=235, PETRI_TRANSITIONS=299} [2024-06-27 19:00:31,691 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2024-06-27 19:00:31,691 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 299 transitions, 3524 flow [2024-06-27 19:00:31,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:31,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:31,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:31,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:00:31,691 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:31,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1112071447, now seen corresponding path program 1 times [2024-06-27 19:00:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:31,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983617747] [2024-06-27 19:00:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:31,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:34,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983617747] [2024-06-27 19:00:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983617747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:34,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:34,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:34,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780790072] [2024-06-27 19:00:34,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:34,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:34,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:34,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 299 transitions, 3524 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:34,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:34,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:34,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:36,981 INFO L124 PetriNetUnfolderBase]: 6869/10859 cut-off events. [2024-06-27 19:00:36,982 INFO L125 PetriNetUnfolderBase]: For 235565/235567 co-relation queries the response was YES. [2024-06-27 19:00:37,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62102 conditions, 10859 events. 6869/10859 cut-off events. For 235565/235567 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 71158 event pairs, 1738 based on Foata normal form. 2/10859 useless extension candidates. Maximal degree in co-relation 61990. Up to 9743 conditions per place. [2024-06-27 19:00:37,119 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 291 selfloop transitions, 55 changer transitions 0/353 dead transitions. [2024-06-27 19:00:37,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 353 transitions, 4594 flow [2024-06-27 19:00:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:00:37,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 19:00:37,121 INFO L175 Difference]: Start difference. First operand has 235 places, 299 transitions, 3524 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:00:37,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 353 transitions, 4594 flow [2024-06-27 19:00:37,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 353 transitions, 4512 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:37,797 INFO L231 Difference]: Finished difference. Result has 239 places, 307 transitions, 3711 flow [2024-06-27 19:00:37,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3711, PETRI_PLACES=239, PETRI_TRANSITIONS=307} [2024-06-27 19:00:37,797 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-06-27 19:00:37,797 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 307 transitions, 3711 flow [2024-06-27 19:00:37,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:37,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:37,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:00:37,798 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:37,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2070880711, now seen corresponding path program 2 times [2024-06-27 19:00:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:37,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105969564] [2024-06-27 19:00:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:40,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105969564] [2024-06-27 19:00:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105969564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:40,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:40,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:40,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175140278] [2024-06-27 19:00:40,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:40,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:40,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:40,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:40,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:40,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 307 transitions, 3711 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:40,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:40,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:40,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:43,155 INFO L124 PetriNetUnfolderBase]: 6947/10979 cut-off events. [2024-06-27 19:00:43,155 INFO L125 PetriNetUnfolderBase]: For 252668/252670 co-relation queries the response was YES. [2024-06-27 19:00:43,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64268 conditions, 10979 events. 6947/10979 cut-off events. For 252668/252670 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 72024 event pairs, 1740 based on Foata normal form. 2/10979 useless extension candidates. Maximal degree in co-relation 64155. Up to 9924 conditions per place. [2024-06-27 19:00:43,316 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 314 selfloop transitions, 47 changer transitions 0/368 dead transitions. [2024-06-27 19:00:43,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 368 transitions, 4847 flow [2024-06-27 19:00:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:00:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:00:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 19:00:43,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851063829787234 [2024-06-27 19:00:43,318 INFO L175 Difference]: Start difference. First operand has 239 places, 307 transitions, 3711 flow. Second operand 10 states and 228 transitions. [2024-06-27 19:00:43,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 368 transitions, 4847 flow [2024-06-27 19:00:44,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 368 transitions, 4681 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:44,013 INFO L231 Difference]: Finished difference. Result has 245 places, 315 transitions, 3814 flow [2024-06-27 19:00:44,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3814, PETRI_PLACES=245, PETRI_TRANSITIONS=315} [2024-06-27 19:00:44,013 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-06-27 19:00:44,013 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 315 transitions, 3814 flow [2024-06-27 19:00:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:44,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:00:44,014 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:44,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2070886291, now seen corresponding path program 3 times [2024-06-27 19:00:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760292391] [2024-06-27 19:00:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:46,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760292391] [2024-06-27 19:00:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760292391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:46,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:46,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714465009] [2024-06-27 19:00:46,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:46,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:46,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 315 transitions, 3814 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:46,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:46,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:46,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:49,245 INFO L124 PetriNetUnfolderBase]: 6941/10971 cut-off events. [2024-06-27 19:00:49,245 INFO L125 PetriNetUnfolderBase]: For 252678/252680 co-relation queries the response was YES. [2024-06-27 19:00:49,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64029 conditions, 10971 events. 6941/10971 cut-off events. For 252678/252680 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71992 event pairs, 1739 based on Foata normal form. 2/10971 useless extension candidates. Maximal degree in co-relation 63914. Up to 9919 conditions per place. [2024-06-27 19:00:49,378 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 304 selfloop transitions, 46 changer transitions 0/357 dead transitions. [2024-06-27 19:00:49,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 357 transitions, 4630 flow [2024-06-27 19:00:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:00:49,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026595744680851 [2024-06-27 19:00:49,380 INFO L175 Difference]: Start difference. First operand has 245 places, 315 transitions, 3814 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:00:49,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 357 transitions, 4630 flow [2024-06-27 19:00:50,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 357 transitions, 4496 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:50,100 INFO L231 Difference]: Finished difference. Result has 247 places, 315 transitions, 3779 flow [2024-06-27 19:00:50,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3779, PETRI_PLACES=247, PETRI_TRANSITIONS=315} [2024-06-27 19:00:50,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-27 19:00:50,101 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 315 transitions, 3779 flow [2024-06-27 19:00:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:50,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:50,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:50,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:00:50,101 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:50,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1231007227, now seen corresponding path program 4 times [2024-06-27 19:00:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:50,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535889012] [2024-06-27 19:00:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:50,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:52,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:52,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535889012] [2024-06-27 19:00:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535889012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:52,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178239371] [2024-06-27 19:00:52,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:52,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 315 transitions, 3779 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:55,628 INFO L124 PetriNetUnfolderBase]: 6977/11030 cut-off events. [2024-06-27 19:00:55,628 INFO L125 PetriNetUnfolderBase]: For 258984/258988 co-relation queries the response was YES. [2024-06-27 19:00:55,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64420 conditions, 11030 events. 6977/11030 cut-off events. For 258984/258988 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 72470 event pairs, 1747 based on Foata normal form. 4/11032 useless extension candidates. Maximal degree in co-relation 64303. Up to 9872 conditions per place. [2024-06-27 19:00:55,752 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 297 selfloop transitions, 62 changer transitions 0/366 dead transitions. [2024-06-27 19:00:55,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 366 transitions, 4807 flow [2024-06-27 19:00:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:00:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:00:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-27 19:00:55,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:00:55,753 INFO L175 Difference]: Start difference. First operand has 247 places, 315 transitions, 3779 flow. Second operand 9 states and 207 transitions. [2024-06-27 19:00:55,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 366 transitions, 4807 flow [2024-06-27 19:00:56,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 366 transitions, 4715 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:00:56,279 INFO L231 Difference]: Finished difference. Result has 249 places, 319 transitions, 3886 flow [2024-06-27 19:00:56,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3886, PETRI_PLACES=249, PETRI_TRANSITIONS=319} [2024-06-27 19:00:56,280 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-27 19:00:56,280 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 319 transitions, 3886 flow [2024-06-27 19:00:56,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:56,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:56,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:56,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:00:56,280 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:56,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1238364457, now seen corresponding path program 5 times [2024-06-27 19:00:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:56,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136266561] [2024-06-27 19:00:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:56,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:58,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:58,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136266561] [2024-06-27 19:00:58,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136266561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:58,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:58,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854722830] [2024-06-27 19:00:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:58,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:58,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:58,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:58,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 319 transitions, 3886 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:58,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:58,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:58,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:01,430 INFO L124 PetriNetUnfolderBase]: 7013/11079 cut-off events. [2024-06-27 19:01:01,430 INFO L125 PetriNetUnfolderBase]: For 265252/265254 co-relation queries the response was YES. [2024-06-27 19:01:01,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 11079 events. 7013/11079 cut-off events. For 265252/265254 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72670 event pairs, 1739 based on Foata normal form. 2/11079 useless extension candidates. Maximal degree in co-relation 64925. Up to 9904 conditions per place. [2024-06-27 19:01:01,560 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 292 selfloop transitions, 65 changer transitions 0/364 dead transitions. [2024-06-27 19:01:01,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 364 transitions, 4904 flow [2024-06-27 19:01:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:01:01,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 19:01:01,568 INFO L175 Difference]: Start difference. First operand has 249 places, 319 transitions, 3886 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:01:01,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 364 transitions, 4904 flow [2024-06-27 19:01:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 364 transitions, 4685 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:01:02,257 INFO L231 Difference]: Finished difference. Result has 249 places, 323 transitions, 3885 flow [2024-06-27 19:01:02,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3885, PETRI_PLACES=249, PETRI_TRANSITIONS=323} [2024-06-27 19:01:02,257 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-27 19:01:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 323 transitions, 3885 flow [2024-06-27 19:01:02,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:02,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:02,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:02,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:01:02,258 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:02,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1238358877, now seen corresponding path program 6 times [2024-06-27 19:01:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89868776] [2024-06-27 19:01:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:04,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:04,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89868776] [2024-06-27 19:01:04,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89868776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:04,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:04,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549568849] [2024-06-27 19:01:04,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:04,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:04,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:04,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 323 transitions, 3885 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:04,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:04,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:07,738 INFO L124 PetriNetUnfolderBase]: 7007/11071 cut-off events. [2024-06-27 19:01:07,738 INFO L125 PetriNetUnfolderBase]: For 265801/265803 co-relation queries the response was YES. [2024-06-27 19:01:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64692 conditions, 11071 events. 7007/11071 cut-off events. For 265801/265803 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 72623 event pairs, 1739 based on Foata normal form. 2/11071 useless extension candidates. Maximal degree in co-relation 64573. Up to 9899 conditions per place. [2024-06-27 19:01:07,879 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 301 selfloop transitions, 67 changer transitions 0/375 dead transitions. [2024-06-27 19:01:07,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 375 transitions, 4765 flow [2024-06-27 19:01:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:01:07,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059101654846335 [2024-06-27 19:01:07,881 INFO L175 Difference]: Start difference. First operand has 249 places, 323 transitions, 3885 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:01:07,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 375 transitions, 4765 flow [2024-06-27 19:01:08,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 375 transitions, 4604 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:08,604 INFO L231 Difference]: Finished difference. Result has 253 places, 323 transitions, 3870 flow [2024-06-27 19:01:08,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3870, PETRI_PLACES=253, PETRI_TRANSITIONS=323} [2024-06-27 19:01:08,604 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 202 predicate places. [2024-06-27 19:01:08,604 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 323 transitions, 3870 flow [2024-06-27 19:01:08,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:01:08,605 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:08,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2010986311, now seen corresponding path program 1 times [2024-06-27 19:01:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340376763] [2024-06-27 19:01:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:12,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340376763] [2024-06-27 19:01:12,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340376763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:12,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:12,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285124572] [2024-06-27 19:01:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:12,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:12,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:12,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:12,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 323 transitions, 3870 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:12,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:12,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:12,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:15,233 INFO L124 PetriNetUnfolderBase]: 7056/10864 cut-off events. [2024-06-27 19:01:15,233 INFO L125 PetriNetUnfolderBase]: For 266558/266570 co-relation queries the response was YES. [2024-06-27 19:01:15,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64925 conditions, 10864 events. 7056/10864 cut-off events. For 266558/266570 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 69022 event pairs, 1279 based on Foata normal form. 13/10874 useless extension candidates. Maximal degree in co-relation 64806. Up to 9769 conditions per place. [2024-06-27 19:01:15,357 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 320 selfloop transitions, 70 changer transitions 0/397 dead transitions. [2024-06-27 19:01:15,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 397 transitions, 5378 flow [2024-06-27 19:01:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:01:15,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 19:01:15,358 INFO L175 Difference]: Start difference. First operand has 253 places, 323 transitions, 3870 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:01:15,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 397 transitions, 5378 flow [2024-06-27 19:01:16,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 397 transitions, 5193 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 19:01:16,019 INFO L231 Difference]: Finished difference. Result has 252 places, 335 transitions, 4104 flow [2024-06-27 19:01:16,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3689, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4104, PETRI_PLACES=252, PETRI_TRANSITIONS=335} [2024-06-27 19:01:16,020 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-06-27 19:01:16,020 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 335 transitions, 4104 flow [2024-06-27 19:01:16,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:16,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:16,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:16,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:01:16,021 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:16,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2008132915, now seen corresponding path program 1 times [2024-06-27 19:01:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:16,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491855747] [2024-06-27 19:01:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:16,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491855747] [2024-06-27 19:01:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491855747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:19,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:19,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:19,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880041757] [2024-06-27 19:01:19,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:19,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 335 transitions, 4104 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:19,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:19,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:22,238 INFO L124 PetriNetUnfolderBase]: 7229/11140 cut-off events. [2024-06-27 19:01:22,238 INFO L125 PetriNetUnfolderBase]: For 285415/285429 co-relation queries the response was YES. [2024-06-27 19:01:22,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67990 conditions, 11140 events. 7229/11140 cut-off events. For 285415/285429 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 70836 event pairs, 1296 based on Foata normal form. 16/11154 useless extension candidates. Maximal degree in co-relation 67870. Up to 9957 conditions per place. [2024-06-27 19:01:22,383 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 355 selfloop transitions, 72 changer transitions 0/434 dead transitions. [2024-06-27 19:01:22,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 434 transitions, 5838 flow [2024-06-27 19:01:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:01:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:01:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-27 19:01:22,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191489361702127 [2024-06-27 19:01:22,384 INFO L175 Difference]: Start difference. First operand has 252 places, 335 transitions, 4104 flow. Second operand 10 states and 244 transitions. [2024-06-27 19:01:22,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 434 transitions, 5838 flow [2024-06-27 19:01:23,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 434 transitions, 5748 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 19:01:23,273 INFO L231 Difference]: Finished difference. Result has 262 places, 361 transitions, 4602 flow [2024-06-27 19:01:23,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4602, PETRI_PLACES=262, PETRI_TRANSITIONS=361} [2024-06-27 19:01:23,274 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 211 predicate places. [2024-06-27 19:01:23,274 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 361 transitions, 4602 flow [2024-06-27 19:01:23,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:23,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:23,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:23,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:01:23,274 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:23,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:23,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1450556213, now seen corresponding path program 2 times [2024-06-27 19:01:23,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:23,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173108641] [2024-06-27 19:01:23,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:23,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173108641] [2024-06-27 19:01:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173108641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:26,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:26,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:26,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183154109] [2024-06-27 19:01:26,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:26,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:26,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 361 transitions, 4602 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:26,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:26,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:26,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:29,886 INFO L124 PetriNetUnfolderBase]: 7252/11175 cut-off events. [2024-06-27 19:01:29,886 INFO L125 PetriNetUnfolderBase]: For 302643/302657 co-relation queries the response was YES. [2024-06-27 19:01:29,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70222 conditions, 11175 events. 7252/11175 cut-off events. For 302643/302657 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 71239 event pairs, 1296 based on Foata normal form. 15/11188 useless extension candidates. Maximal degree in co-relation 70097. Up to 10227 conditions per place. [2024-06-27 19:01:30,030 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 361 selfloop transitions, 52 changer transitions 0/420 dead transitions. [2024-06-27 19:01:30,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 420 transitions, 5750 flow [2024-06-27 19:01:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:30,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:01:30,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 19:01:30,031 INFO L175 Difference]: Start difference. First operand has 262 places, 361 transitions, 4602 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:01:30,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 420 transitions, 5750 flow [2024-06-27 19:01:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 420 transitions, 5560 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:30,859 INFO L231 Difference]: Finished difference. Result has 266 places, 364 transitions, 4576 flow [2024-06-27 19:01:30,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4576, PETRI_PLACES=266, PETRI_TRANSITIONS=364} [2024-06-27 19:01:30,859 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-27 19:01:30,859 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 364 transitions, 4576 flow [2024-06-27 19:01:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:30,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:30,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:01:30,860 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1627687919, now seen corresponding path program 2 times [2024-06-27 19:01:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954590993] [2024-06-27 19:01:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:34,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:34,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954590993] [2024-06-27 19:01:34,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954590993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:34,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:34,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:34,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922801974] [2024-06-27 19:01:34,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:34,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:34,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:34,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:34,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:34,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 364 transitions, 4576 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:34,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:34,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:34,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:36,986 INFO L124 PetriNetUnfolderBase]: 7448/11449 cut-off events. [2024-06-27 19:01:36,986 INFO L125 PetriNetUnfolderBase]: For 316380/316394 co-relation queries the response was YES. [2024-06-27 19:01:37,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71916 conditions, 11449 events. 7448/11449 cut-off events. For 316380/316394 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72845 event pairs, 1299 based on Foata normal form. 16/11463 useless extension candidates. Maximal degree in co-relation 71789. Up to 10156 conditions per place. [2024-06-27 19:01:37,154 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 368 selfloop transitions, 89 changer transitions 0/464 dead transitions. [2024-06-27 19:01:37,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 464 transitions, 6458 flow [2024-06-27 19:01:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:01:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:01:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-27 19:01:37,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:01:37,156 INFO L175 Difference]: Start difference. First operand has 266 places, 364 transitions, 4576 flow. Second operand 11 states and 264 transitions. [2024-06-27 19:01:37,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 464 transitions, 6458 flow [2024-06-27 19:01:38,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 464 transitions, 6318 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:38,285 INFO L231 Difference]: Finished difference. Result has 271 places, 385 transitions, 4917 flow [2024-06-27 19:01:38,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4917, PETRI_PLACES=271, PETRI_TRANSITIONS=385} [2024-06-27 19:01:38,286 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 220 predicate places. [2024-06-27 19:01:38,286 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 385 transitions, 4917 flow [2024-06-27 19:01:38,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:38,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:38,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:01:38,287 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -684381775, now seen corresponding path program 3 times [2024-06-27 19:01:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397181999] [2024-06-27 19:01:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:41,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397181999] [2024-06-27 19:01:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397181999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:41,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418372245] [2024-06-27 19:01:41,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:41,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:41,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:41,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 385 transitions, 4917 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:41,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:41,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:44,571 INFO L124 PetriNetUnfolderBase]: 7497/11533 cut-off events. [2024-06-27 19:01:44,571 INFO L125 PetriNetUnfolderBase]: For 324854/324868 co-relation queries the response was YES. [2024-06-27 19:01:44,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73015 conditions, 11533 events. 7497/11533 cut-off events. For 324854/324868 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 73536 event pairs, 1305 based on Foata normal form. 15/11546 useless extension candidates. Maximal degree in co-relation 72887. Up to 10512 conditions per place. [2024-06-27 19:01:44,724 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 381 selfloop transitions, 64 changer transitions 0/452 dead transitions. [2024-06-27 19:01:44,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 452 transitions, 6357 flow [2024-06-27 19:01:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:01:44,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059101654846335 [2024-06-27 19:01:44,726 INFO L175 Difference]: Start difference. First operand has 271 places, 385 transitions, 4917 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:01:44,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 452 transitions, 6357 flow [2024-06-27 19:01:46,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 452 transitions, 6220 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:46,040 INFO L231 Difference]: Finished difference. Result has 278 places, 391 transitions, 5046 flow [2024-06-27 19:01:46,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5046, PETRI_PLACES=278, PETRI_TRANSITIONS=391} [2024-06-27 19:01:46,041 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 227 predicate places. [2024-06-27 19:01:46,041 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 391 transitions, 5046 flow [2024-06-27 19:01:46,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:46,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:46,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:46,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:01:46,041 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:46,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash -684144439, now seen corresponding path program 3 times [2024-06-27 19:01:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747536418] [2024-06-27 19:01:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:49,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747536418] [2024-06-27 19:01:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747536418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:49,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195786237] [2024-06-27 19:01:49,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:49,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 391 transitions, 5046 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:49,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:49,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:49,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:51,969 INFO L124 PetriNetUnfolderBase]: 7491/11531 cut-off events. [2024-06-27 19:01:51,969 INFO L125 PetriNetUnfolderBase]: For 330672/330686 co-relation queries the response was YES. [2024-06-27 19:01:52,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72736 conditions, 11531 events. 7491/11531 cut-off events. For 330672/330686 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 73631 event pairs, 1291 based on Foata normal form. 16/11545 useless extension candidates. Maximal degree in co-relation 72606. Up to 10217 conditions per place. [2024-06-27 19:01:52,137 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 361 selfloop transitions, 87 changer transitions 0/455 dead transitions. [2024-06-27 19:01:52,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 455 transitions, 6436 flow [2024-06-27 19:01:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:01:52,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200945626477541 [2024-06-27 19:01:52,139 INFO L175 Difference]: Start difference. First operand has 278 places, 391 transitions, 5046 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:01:52,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 455 transitions, 6436 flow [2024-06-27 19:01:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 455 transitions, 6283 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:01:53,536 INFO L231 Difference]: Finished difference. Result has 283 places, 391 transitions, 5075 flow [2024-06-27 19:01:53,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4893, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5075, PETRI_PLACES=283, PETRI_TRANSITIONS=391} [2024-06-27 19:01:53,537 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 232 predicate places. [2024-06-27 19:01:53,537 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 391 transitions, 5075 flow [2024-06-27 19:01:53,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:53,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:53,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:01:53,537 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:53,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash -684135511, now seen corresponding path program 1 times [2024-06-27 19:01:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882118498] [2024-06-27 19:01:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:57,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:57,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:57,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882118498] [2024-06-27 19:01:57,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882118498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:57,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:01:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315249608] [2024-06-27 19:01:57,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:57,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:01:57,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:57,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:01:57,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:01:57,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:01:57,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 391 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:57,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:57,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:01:57,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:00,326 INFO L124 PetriNetUnfolderBase]: 7254/11251 cut-off events. [2024-06-27 19:02:00,326 INFO L125 PetriNetUnfolderBase]: For 357011/357130 co-relation queries the response was YES. [2024-06-27 19:02:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71166 conditions, 11251 events. 7254/11251 cut-off events. For 357011/357130 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 72755 event pairs, 1266 based on Foata normal form. 105/11250 useless extension candidates. Maximal degree in co-relation 71035. Up to 9517 conditions per place. [2024-06-27 19:02:00,468 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 331 selfloop transitions, 80 changer transitions 0/454 dead transitions. [2024-06-27 19:02:00,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 454 transitions, 6189 flow [2024-06-27 19:02:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:02:00,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-27 19:02:00,469 INFO L175 Difference]: Start difference. First operand has 283 places, 391 transitions, 5075 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:02:00,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 454 transitions, 6189 flow [2024-06-27 19:02:01,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 454 transitions, 6015 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:02:01,502 INFO L231 Difference]: Finished difference. Result has 284 places, 393 transitions, 5123 flow [2024-06-27 19:02:01,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5123, PETRI_PLACES=284, PETRI_TRANSITIONS=393} [2024-06-27 19:02:01,503 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 233 predicate places. [2024-06-27 19:02:01,503 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 393 transitions, 5123 flow [2024-06-27 19:02:01,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:01,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:01,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:01,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:02:01,503 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:01,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash 100303033, now seen corresponding path program 4 times [2024-06-27 19:02:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:01,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116952570] [2024-06-27 19:02:01,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:01,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:04,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:04,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116952570] [2024-06-27 19:02:04,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116952570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:04,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:04,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784325898] [2024-06-27 19:02:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:04,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:04,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:04,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 393 transitions, 5123 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:04,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:04,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:04,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:07,999 INFO L124 PetriNetUnfolderBase]: 7752/11988 cut-off events. [2024-06-27 19:02:07,999 INFO L125 PetriNetUnfolderBase]: For 359345/359373 co-relation queries the response was YES. [2024-06-27 19:02:08,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76229 conditions, 11988 events. 7752/11988 cut-off events. For 359345/359373 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 77281 event pairs, 1432 based on Foata normal form. 21/12005 useless extension candidates. Maximal degree in co-relation 76097. Up to 10647 conditions per place. [2024-06-27 19:02:08,135 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 354 selfloop transitions, 98 changer transitions 0/459 dead transitions. [2024-06-27 19:02:08,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 459 transitions, 6733 flow [2024-06-27 19:02:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:02:08,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:02:08,137 INFO L175 Difference]: Start difference. First operand has 284 places, 393 transitions, 5123 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:02:08,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 459 transitions, 6733 flow [2024-06-27 19:02:09,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 459 transitions, 6568 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:09,476 INFO L231 Difference]: Finished difference. Result has 286 places, 399 transitions, 5288 flow [2024-06-27 19:02:09,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5288, PETRI_PLACES=286, PETRI_TRANSITIONS=399} [2024-06-27 19:02:09,476 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 235 predicate places. [2024-06-27 19:02:09,476 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 399 transitions, 5288 flow [2024-06-27 19:02:09,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:09,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:09,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:02:09,477 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:09,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 111730873, now seen corresponding path program 5 times [2024-06-27 19:02:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:09,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910137999] [2024-06-27 19:02:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910137999] [2024-06-27 19:02:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910137999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:12,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:12,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:12,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178642874] [2024-06-27 19:02:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:12,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:12,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:12,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:12,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 399 transitions, 5288 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:12,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:12,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:12,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:15,491 INFO L124 PetriNetUnfolderBase]: 7806/12073 cut-off events. [2024-06-27 19:02:15,491 INFO L125 PetriNetUnfolderBase]: For 367545/367573 co-relation queries the response was YES. [2024-06-27 19:02:15,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76760 conditions, 12073 events. 7806/12073 cut-off events. For 367545/367573 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 77873 event pairs, 1440 based on Foata normal form. 21/12090 useless extension candidates. Maximal degree in co-relation 76627. Up to 10702 conditions per place. [2024-06-27 19:02:15,660 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 351 selfloop transitions, 106 changer transitions 0/464 dead transitions. [2024-06-27 19:02:15,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 464 transitions, 6975 flow [2024-06-27 19:02:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:02:15,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 19:02:15,662 INFO L175 Difference]: Start difference. First operand has 286 places, 399 transitions, 5288 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:02:15,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 464 transitions, 6975 flow [2024-06-27 19:02:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 464 transitions, 6701 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:16,701 INFO L231 Difference]: Finished difference. Result has 290 places, 408 transitions, 5458 flow [2024-06-27 19:02:16,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5458, PETRI_PLACES=290, PETRI_TRANSITIONS=408} [2024-06-27 19:02:16,702 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 239 predicate places. [2024-06-27 19:02:16,702 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 408 transitions, 5458 flow [2024-06-27 19:02:16,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:16,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:16,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:16,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:02:16,702 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:16,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:16,703 INFO L85 PathProgramCache]: Analyzing trace with hash -124864877, now seen corresponding path program 6 times [2024-06-27 19:02:16,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:16,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947609224] [2024-06-27 19:02:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:16,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:19,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:19,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947609224] [2024-06-27 19:02:19,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947609224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:19,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:19,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404397736] [2024-06-27 19:02:19,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:19,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:19,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:19,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:19,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 408 transitions, 5458 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:19,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:19,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:19,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:23,322 INFO L124 PetriNetUnfolderBase]: 7803/12063 cut-off events. [2024-06-27 19:02:23,323 INFO L125 PetriNetUnfolderBase]: For 371243/371271 co-relation queries the response was YES. [2024-06-27 19:02:23,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76510 conditions, 12063 events. 7803/12063 cut-off events. For 371243/371271 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 77826 event pairs, 1428 based on Foata normal form. 21/12080 useless extension candidates. Maximal degree in co-relation 76376. Up to 10699 conditions per place. [2024-06-27 19:02:23,481 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 359 selfloop transitions, 103 changer transitions 0/469 dead transitions. [2024-06-27 19:02:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 469 transitions, 7102 flow [2024-06-27 19:02:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:02:23,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 19:02:23,482 INFO L175 Difference]: Start difference. First operand has 290 places, 408 transitions, 5458 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:02:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 469 transitions, 7102 flow [2024-06-27 19:02:24,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 469 transitions, 6904 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:02:24,872 INFO L231 Difference]: Finished difference. Result has 294 places, 408 transitions, 5472 flow [2024-06-27 19:02:24,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5472, PETRI_PLACES=294, PETRI_TRANSITIONS=408} [2024-06-27 19:02:24,873 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 243 predicate places. [2024-06-27 19:02:24,873 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 408 transitions, 5472 flow [2024-06-27 19:02:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:24,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:24,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:24,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:02:24,873 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:24,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:24,873 INFO L85 PathProgramCache]: Analyzing trace with hash 412416327, now seen corresponding path program 7 times [2024-06-27 19:02:24,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:24,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819990273] [2024-06-27 19:02:24,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:24,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:27,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819990273] [2024-06-27 19:02:27,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819990273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:27,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074641839] [2024-06-27 19:02:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:27,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:27,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:27,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:27,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 408 transitions, 5472 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:27,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:27,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:27,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:31,124 INFO L124 PetriNetUnfolderBase]: 7800/12047 cut-off events. [2024-06-27 19:02:31,124 INFO L125 PetriNetUnfolderBase]: For 377095/377123 co-relation queries the response was YES. [2024-06-27 19:02:31,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76409 conditions, 12047 events. 7800/12047 cut-off events. For 377095/377123 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77600 event pairs, 1438 based on Foata normal form. 21/12064 useless extension candidates. Maximal degree in co-relation 76274. Up to 10974 conditions per place. [2024-06-27 19:02:31,315 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 395 selfloop transitions, 60 changer transitions 0/462 dead transitions. [2024-06-27 19:02:31,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 462 transitions, 6688 flow [2024-06-27 19:02:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:02:31,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:02:31,316 INFO L175 Difference]: Start difference. First operand has 294 places, 408 transitions, 5472 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:02:31,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 462 transitions, 6688 flow [2024-06-27 19:02:32,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 462 transitions, 6479 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:32,882 INFO L231 Difference]: Finished difference. Result has 297 places, 408 transitions, 5389 flow [2024-06-27 19:02:32,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5389, PETRI_PLACES=297, PETRI_TRANSITIONS=408} [2024-06-27 19:02:32,883 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 19:02:32,883 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 408 transitions, 5389 flow [2024-06-27 19:02:32,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:32,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:32,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:32,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:02:32,884 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:32,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:32,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1920070311, now seen corresponding path program 4 times [2024-06-27 19:02:32,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:32,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094849971] [2024-06-27 19:02:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:35,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094849971] [2024-06-27 19:02:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094849971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:35,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:35,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:35,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568678122] [2024-06-27 19:02:35,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:35,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:35,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:35,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:35,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 408 transitions, 5389 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:35,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:35,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:35,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:39,225 INFO L124 PetriNetUnfolderBase]: 7794/12031 cut-off events. [2024-06-27 19:02:39,225 INFO L125 PetriNetUnfolderBase]: For 379828/379856 co-relation queries the response was YES. [2024-06-27 19:02:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75980 conditions, 12031 events. 7794/12031 cut-off events. For 379828/379856 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77399 event pairs, 1427 based on Foata normal form. 22/12049 useless extension candidates. Maximal degree in co-relation 75844. Up to 10922 conditions per place. [2024-06-27 19:02:39,403 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 400 selfloop transitions, 65 changer transitions 0/472 dead transitions. [2024-06-27 19:02:39,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 472 transitions, 6783 flow [2024-06-27 19:02:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:02:39,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 19:02:39,404 INFO L175 Difference]: Start difference. First operand has 297 places, 408 transitions, 5389 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:02:39,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 472 transitions, 6783 flow [2024-06-27 19:02:40,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 472 transitions, 6655 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:40,995 INFO L231 Difference]: Finished difference. Result has 302 places, 410 transitions, 5439 flow [2024-06-27 19:02:40,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5439, PETRI_PLACES=302, PETRI_TRANSITIONS=410} [2024-06-27 19:02:40,995 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 251 predicate places. [2024-06-27 19:02:40,996 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 410 transitions, 5439 flow [2024-06-27 19:02:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:40,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:02:40,996 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:40,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 226784893, now seen corresponding path program 8 times [2024-06-27 19:02:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213666239] [2024-06-27 19:02:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:43,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:43,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213666239] [2024-06-27 19:02:43,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213666239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:43,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:43,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005308822] [2024-06-27 19:02:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:43,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:43,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 410 transitions, 5439 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:47,586 INFO L124 PetriNetUnfolderBase]: 7876/12190 cut-off events. [2024-06-27 19:02:47,586 INFO L125 PetriNetUnfolderBase]: For 389218/389246 co-relation queries the response was YES. [2024-06-27 19:02:47,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77193 conditions, 12190 events. 7876/12190 cut-off events. For 389218/389246 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 78803 event pairs, 1450 based on Foata normal form. 21/12207 useless extension candidates. Maximal degree in co-relation 77055. Up to 11006 conditions per place. [2024-06-27 19:02:47,730 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 403 selfloop transitions, 80 changer transitions 0/490 dead transitions. [2024-06-27 19:02:47,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 490 transitions, 7207 flow [2024-06-27 19:02:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:02:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:02:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:02:47,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49361702127659574 [2024-06-27 19:02:47,731 INFO L175 Difference]: Start difference. First operand has 302 places, 410 transitions, 5439 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:02:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 490 transitions, 7207 flow [2024-06-27 19:02:48,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 490 transitions, 7060 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:48,875 INFO L231 Difference]: Finished difference. Result has 309 places, 425 transitions, 5787 flow [2024-06-27 19:02:48,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5303, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5787, PETRI_PLACES=309, PETRI_TRANSITIONS=425} [2024-06-27 19:02:48,876 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 258 predicate places. [2024-06-27 19:02:48,876 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 425 transitions, 5787 flow [2024-06-27 19:02:48,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:48,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:48,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:48,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:02:48,876 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:48,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash 229755283, now seen corresponding path program 9 times [2024-06-27 19:02:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:48,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400104692] [2024-06-27 19:02:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:48,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400104692] [2024-06-27 19:02:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400104692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:51,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:51,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:51,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217251475] [2024-06-27 19:02:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:51,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:51,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:51,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:51,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 425 transitions, 5787 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:54,903 INFO L124 PetriNetUnfolderBase]: 7873/12158 cut-off events. [2024-06-27 19:02:54,903 INFO L125 PetriNetUnfolderBase]: For 394942/394970 co-relation queries the response was YES. [2024-06-27 19:02:55,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77412 conditions, 12158 events. 7873/12158 cut-off events. For 394942/394970 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 78388 event pairs, 1428 based on Foata normal form. 21/12175 useless extension candidates. Maximal degree in co-relation 77270. Up to 11003 conditions per place. [2024-06-27 19:02:55,077 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 390 selfloop transitions, 78 changer transitions 0/475 dead transitions. [2024-06-27 19:02:55,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 475 transitions, 7017 flow [2024-06-27 19:02:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:02:55,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026595744680851 [2024-06-27 19:02:55,079 INFO L175 Difference]: Start difference. First operand has 309 places, 425 transitions, 5787 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:02:55,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 475 transitions, 7017 flow [2024-06-27 19:02:56,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 475 transitions, 6866 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:56,420 INFO L231 Difference]: Finished difference. Result has 314 places, 425 transitions, 5799 flow [2024-06-27 19:02:56,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5636, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5799, PETRI_PLACES=314, PETRI_TRANSITIONS=425} [2024-06-27 19:02:56,420 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 263 predicate places. [2024-06-27 19:02:56,420 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 425 transitions, 5799 flow [2024-06-27 19:02:56,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:56,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:56,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:56,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:02:56,421 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:56,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 229518319, now seen corresponding path program 5 times [2024-06-27 19:02:56,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:56,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208331673] [2024-06-27 19:02:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:59,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208331673] [2024-06-27 19:02:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208331673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:59,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:59,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739673171] [2024-06-27 19:02:59,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:59,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:59,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 425 transitions, 5799 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:59,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:59,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:59,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:02,557 INFO L124 PetriNetUnfolderBase]: 7919/12228 cut-off events. [2024-06-27 19:03:02,557 INFO L125 PetriNetUnfolderBase]: For 405439/405467 co-relation queries the response was YES. [2024-06-27 19:03:02,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77867 conditions, 12228 events. 7919/12228 cut-off events. For 405439/405467 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 78856 event pairs, 1433 based on Foata normal form. 22/12246 useless extension candidates. Maximal degree in co-relation 77724. Up to 11112 conditions per place. [2024-06-27 19:03:02,717 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 406 selfloop transitions, 66 changer transitions 0/479 dead transitions. [2024-06-27 19:03:02,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 479 transitions, 7073 flow [2024-06-27 19:03:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:03:02,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026595744680851 [2024-06-27 19:03:02,718 INFO L175 Difference]: Start difference. First operand has 314 places, 425 transitions, 5799 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:03:02,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 479 transitions, 7073 flow [2024-06-27 19:03:04,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 479 transitions, 6917 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:03:04,226 INFO L231 Difference]: Finished difference. Result has 315 places, 429 transitions, 5856 flow [2024-06-27 19:03:04,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5643, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5856, PETRI_PLACES=315, PETRI_TRANSITIONS=429} [2024-06-27 19:03:04,226 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 264 predicate places. [2024-06-27 19:03:04,227 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 429 transitions, 5856 flow [2024-06-27 19:03:04,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:04,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:04,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:03:04,227 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:04,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash 227200789, now seen corresponding path program 6 times [2024-06-27 19:03:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:04,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433032701] [2024-06-27 19:03:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:04,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:06,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:06,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433032701] [2024-06-27 19:03:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433032701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:06,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:06,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040715751] [2024-06-27 19:03:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:06,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:06,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 429 transitions, 5856 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:06,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:06,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:06,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:10,275 INFO L124 PetriNetUnfolderBase]: 7985/12360 cut-off events. [2024-06-27 19:03:10,275 INFO L125 PetriNetUnfolderBase]: For 416570/416598 co-relation queries the response was YES. [2024-06-27 19:03:10,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78795 conditions, 12360 events. 7985/12360 cut-off events. For 416570/416598 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 79969 event pairs, 1427 based on Foata normal form. 22/12378 useless extension candidates. Maximal degree in co-relation 78651. Up to 10561 conditions per place. [2024-06-27 19:03:10,460 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 384 selfloop transitions, 111 changer transitions 0/502 dead transitions. [2024-06-27 19:03:10,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 502 transitions, 7568 flow [2024-06-27 19:03:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:03:10,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212765957446809 [2024-06-27 19:03:10,462 INFO L175 Difference]: Start difference. First operand has 315 places, 429 transitions, 5856 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:03:10,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 502 transitions, 7568 flow [2024-06-27 19:03:12,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 502 transitions, 7407 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:12,138 INFO L231 Difference]: Finished difference. Result has 319 places, 446 transitions, 6278 flow [2024-06-27 19:03:12,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6278, PETRI_PLACES=319, PETRI_TRANSITIONS=446} [2024-06-27 19:03:12,139 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 268 predicate places. [2024-06-27 19:03:12,139 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 446 transitions, 6278 flow [2024-06-27 19:03:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:12,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:12,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:03:12,139 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:12,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash 265573867, now seen corresponding path program 7 times [2024-06-27 19:03:12,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:12,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144827482] [2024-06-27 19:03:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:14,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144827482] [2024-06-27 19:03:14,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144827482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:14,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:14,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:14,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298684024] [2024-06-27 19:03:14,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:14,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:14,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:14,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:14,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:14,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:14,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 446 transitions, 6278 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:14,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:14,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:14,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:18,268 INFO L124 PetriNetUnfolderBase]: 8103/12522 cut-off events. [2024-06-27 19:03:18,268 INFO L125 PetriNetUnfolderBase]: For 439762/439790 co-relation queries the response was YES. [2024-06-27 19:03:18,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82026 conditions, 12522 events. 8103/12522 cut-off events. For 439762/439790 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 80925 event pairs, 1423 based on Foata normal form. 22/12540 useless extension candidates. Maximal degree in co-relation 81879. Up to 10662 conditions per place. [2024-06-27 19:03:18,439 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 377 selfloop transitions, 123 changer transitions 0/507 dead transitions. [2024-06-27 19:03:18,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 507 transitions, 8050 flow [2024-06-27 19:03:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:03:18,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:03:18,441 INFO L175 Difference]: Start difference. First operand has 319 places, 446 transitions, 6278 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:03:18,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 507 transitions, 8050 flow [2024-06-27 19:03:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 507 transitions, 7871 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:20,225 INFO L231 Difference]: Finished difference. Result has 324 places, 456 transitions, 6599 flow [2024-06-27 19:03:20,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6115, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6599, PETRI_PLACES=324, PETRI_TRANSITIONS=456} [2024-06-27 19:03:20,226 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 273 predicate places. [2024-06-27 19:03:20,226 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 456 transitions, 6599 flow [2024-06-27 19:03:20,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:20,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:20,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:03:20,226 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:20,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:20,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1137363675, now seen corresponding path program 10 times [2024-06-27 19:03:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065849514] [2024-06-27 19:03:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065849514] [2024-06-27 19:03:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065849514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888414975] [2024-06-27 19:03:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:22,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:22,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 456 transitions, 6599 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:22,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:22,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:22,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:26,266 INFO L124 PetriNetUnfolderBase]: 8100/12516 cut-off events. [2024-06-27 19:03:26,267 INFO L125 PetriNetUnfolderBase]: For 441078/441106 co-relation queries the response was YES. [2024-06-27 19:03:26,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82409 conditions, 12516 events. 8100/12516 cut-off events. For 441078/441106 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 81038 event pairs, 1450 based on Foata normal form. 21/12533 useless extension candidates. Maximal degree in co-relation 82259. Up to 11142 conditions per place. [2024-06-27 19:03:26,493 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 394 selfloop transitions, 107 changer transitions 0/508 dead transitions. [2024-06-27 19:03:26,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 508 transitions, 8021 flow [2024-06-27 19:03:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:03:26,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 19:03:26,494 INFO L175 Difference]: Start difference. First operand has 324 places, 456 transitions, 6599 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:03:26,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 508 transitions, 8021 flow [2024-06-27 19:03:28,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 508 transitions, 7808 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:28,909 INFO L231 Difference]: Finished difference. Result has 327 places, 456 transitions, 6619 flow [2024-06-27 19:03:28,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6388, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6619, PETRI_PLACES=327, PETRI_TRANSITIONS=456} [2024-06-27 19:03:28,910 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 276 predicate places. [2024-06-27 19:03:28,910 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 456 transitions, 6619 flow [2024-06-27 19:03:28,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:28,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:28,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:03:28,911 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:28,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash 265158157, now seen corresponding path program 8 times [2024-06-27 19:03:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:28,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676655934] [2024-06-27 19:03:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:31,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676655934] [2024-06-27 19:03:31,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676655934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:31,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:31,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871785708] [2024-06-27 19:03:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:31,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:31,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 456 transitions, 6619 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:34,776 INFO L124 PetriNetUnfolderBase]: 8094/12480 cut-off events. [2024-06-27 19:03:34,776 INFO L125 PetriNetUnfolderBase]: For 435432/435460 co-relation queries the response was YES. [2024-06-27 19:03:34,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81571 conditions, 12480 events. 8094/12480 cut-off events. For 435432/435460 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80537 event pairs, 1447 based on Foata normal form. 22/12498 useless extension candidates. Maximal degree in co-relation 81421. Up to 11294 conditions per place. [2024-06-27 19:03:34,959 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 422 selfloop transitions, 74 changer transitions 0/503 dead transitions. [2024-06-27 19:03:34,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 503 transitions, 7839 flow [2024-06-27 19:03:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:03:34,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:03:34,961 INFO L175 Difference]: Start difference. First operand has 327 places, 456 transitions, 6619 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:03:34,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 503 transitions, 7839 flow [2024-06-27 19:03:37,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 503 transitions, 7547 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-27 19:03:37,372 INFO L231 Difference]: Finished difference. Result has 325 places, 456 transitions, 6492 flow [2024-06-27 19:03:37,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6492, PETRI_PLACES=325, PETRI_TRANSITIONS=456} [2024-06-27 19:03:37,372 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 274 predicate places. [2024-06-27 19:03:37,372 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 456 transitions, 6492 flow [2024-06-27 19:03:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:37,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:37,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:03:37,373 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:37,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash 487761097, now seen corresponding path program 9 times [2024-06-27 19:03:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:37,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336867281] [2024-06-27 19:03:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:37,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:40,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:40,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336867281] [2024-06-27 19:03:40,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336867281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:40,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:40,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:40,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891632084] [2024-06-27 19:03:40,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:40,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:40,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:40,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:40,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 456 transitions, 6492 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:40,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:40,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:40,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:44,392 INFO L124 PetriNetUnfolderBase]: 8150/12527 cut-off events. [2024-06-27 19:03:44,393 INFO L125 PetriNetUnfolderBase]: For 437010/437052 co-relation queries the response was YES. [2024-06-27 19:03:44,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81627 conditions, 12527 events. 8150/12527 cut-off events. For 437010/437052 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 80735 event pairs, 1382 based on Foata normal form. 30/12553 useless extension candidates. Maximal degree in co-relation 81479. Up to 10703 conditions per place. [2024-06-27 19:03:44,569 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 379 selfloop transitions, 122 changer transitions 0/508 dead transitions. [2024-06-27 19:03:44,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 508 transitions, 8163 flow [2024-06-27 19:03:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:03:44,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 19:03:44,571 INFO L175 Difference]: Start difference. First operand has 325 places, 456 transitions, 6492 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:03:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 508 transitions, 8163 flow [2024-06-27 19:03:46,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 508 transitions, 7998 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:03:46,034 INFO L231 Difference]: Finished difference. Result has 326 places, 464 transitions, 6823 flow [2024-06-27 19:03:46,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6823, PETRI_PLACES=326, PETRI_TRANSITIONS=464} [2024-06-27 19:03:46,035 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 275 predicate places. [2024-06-27 19:03:46,035 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 464 transitions, 6823 flow [2024-06-27 19:03:46,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:46,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:46,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:03:46,035 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:46,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 493475017, now seen corresponding path program 10 times [2024-06-27 19:03:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:46,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894550041] [2024-06-27 19:03:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894550041] [2024-06-27 19:03:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894550041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:48,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:48,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:48,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746626532] [2024-06-27 19:03:48,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:48,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:48,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:48,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:48,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 464 transitions, 6823 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:48,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:48,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:48,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:52,855 INFO L124 PetriNetUnfolderBase]: 8144/12527 cut-off events. [2024-06-27 19:03:52,856 INFO L125 PetriNetUnfolderBase]: For 428610/428652 co-relation queries the response was YES. [2024-06-27 19:03:52,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82642 conditions, 12527 events. 8144/12527 cut-off events. For 428610/428652 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 80704 event pairs, 1379 based on Foata normal form. 30/12553 useless extension candidates. Maximal degree in co-relation 82493. Up to 10698 conditions per place. [2024-06-27 19:03:53,218 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 379 selfloop transitions, 124 changer transitions 0/510 dead transitions. [2024-06-27 19:03:53,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 510 transitions, 8387 flow [2024-06-27 19:03:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:03:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:03:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:03:53,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 19:03:53,219 INFO L175 Difference]: Start difference. First operand has 326 places, 464 transitions, 6823 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:03:53,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 510 transitions, 8387 flow [2024-06-27 19:03:54,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 510 transitions, 8144 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 19:03:54,995 INFO L231 Difference]: Finished difference. Result has 330 places, 464 transitions, 6835 flow [2024-06-27 19:03:54,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6580, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6835, PETRI_PLACES=330, PETRI_TRANSITIONS=464} [2024-06-27 19:03:54,996 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 279 predicate places. [2024-06-27 19:03:54,996 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 464 transitions, 6835 flow [2024-06-27 19:03:54,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:54,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:54,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:54,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:03:54,996 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:54,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:54,997 INFO L85 PathProgramCache]: Analyzing trace with hash 265157971, now seen corresponding path program 11 times [2024-06-27 19:03:54,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:54,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438461268] [2024-06-27 19:03:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:54,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:57,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438461268] [2024-06-27 19:03:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438461268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329185674] [2024-06-27 19:03:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:57,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:57,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 464 transitions, 6835 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:57,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:57,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:57,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:02,304 INFO L124 PetriNetUnfolderBase]: 8141/12592 cut-off events. [2024-06-27 19:04:02,304 INFO L125 PetriNetUnfolderBase]: For 419655/419683 co-relation queries the response was YES. [2024-06-27 19:04:02,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82201 conditions, 12592 events. 8141/12592 cut-off events. For 419655/419683 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 81761 event pairs, 1465 based on Foata normal form. 21/12609 useless extension candidates. Maximal degree in co-relation 82051. Up to 11199 conditions per place. [2024-06-27 19:04:02,671 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 418 selfloop transitions, 113 changer transitions 0/538 dead transitions. [2024-06-27 19:04:02,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 538 transitions, 8435 flow [2024-06-27 19:04:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 19:04:02,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-27 19:04:02,673 INFO L175 Difference]: Start difference. First operand has 330 places, 464 transitions, 6835 flow. Second operand 9 states and 230 transitions. [2024-06-27 19:04:02,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 538 transitions, 8435 flow [2024-06-27 19:04:04,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 538 transitions, 8160 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:04:04,532 INFO L231 Difference]: Finished difference. Result has 334 places, 464 transitions, 6804 flow [2024-06-27 19:04:04,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6560, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6804, PETRI_PLACES=334, PETRI_TRANSITIONS=464} [2024-06-27 19:04:04,533 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-06-27 19:04:04,533 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 464 transitions, 6804 flow [2024-06-27 19:04:04,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:04,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:04,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:04,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:04:04,533 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:04,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1632101007, now seen corresponding path program 11 times [2024-06-27 19:04:04,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:04,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235611349] [2024-06-27 19:04:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:04,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:07,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235611349] [2024-06-27 19:04:07,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235611349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:07,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459082389] [2024-06-27 19:04:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:07,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:07,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 464 transitions, 6804 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:07,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:07,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:07,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:11,644 INFO L124 PetriNetUnfolderBase]: 8135/12475 cut-off events. [2024-06-27 19:04:11,644 INFO L125 PetriNetUnfolderBase]: For 424238/424252 co-relation queries the response was YES. [2024-06-27 19:04:11,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81347 conditions, 12475 events. 8135/12475 cut-off events. For 424238/424252 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 80002 event pairs, 1364 based on Foata normal form. 16/12489 useless extension candidates. Maximal degree in co-relation 81197. Up to 11059 conditions per place. [2024-06-27 19:04:11,819 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 415 selfloop transitions, 108 changer transitions 0/530 dead transitions. [2024-06-27 19:04:11,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 530 transitions, 8266 flow [2024-06-27 19:04:11,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:04:11,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 19:04:11,821 INFO L175 Difference]: Start difference. First operand has 334 places, 464 transitions, 6804 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:04:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 530 transitions, 8266 flow [2024-06-27 19:04:13,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 530 transitions, 7935 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-27 19:04:13,766 INFO L231 Difference]: Finished difference. Result has 332 places, 465 transitions, 6732 flow [2024-06-27 19:04:13,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6479, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6732, PETRI_PLACES=332, PETRI_TRANSITIONS=465} [2024-06-27 19:04:13,767 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 281 predicate places. [2024-06-27 19:04:13,767 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 465 transitions, 6732 flow [2024-06-27 19:04:13,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:13,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:13,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:04:13,767 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:13,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 88026451, now seen corresponding path program 12 times [2024-06-27 19:04:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793956561] [2024-06-27 19:04:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat