./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi009_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/rfi009_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/rfi009_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/rfi009_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 18:44:45,079 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:44:45,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:44:45,150 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:44:45,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:44:45,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:44:45,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:44:45,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:44:45,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:44:45,179 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:44:45,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:44:45,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:44:45,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:44:45,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:44:45,181 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:44:45,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:44:45,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:44:45,182 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:44:45,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:44:45,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:44:45,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:44:45,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:44:45,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:44:45,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:44:45,185 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:44:45,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:44:45,185 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:44:45,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:44:45,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:44:45,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:44:45,187 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:44:45,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:44:45,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:44:45,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:44:45,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:44:45,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:44:45,188 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:44:45,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:44:45,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:44:45,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:44:45,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:44:45,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:44:45,429 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:44:45,429 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:44:45,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i [2024-06-27 18:44:46,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:44:46,591 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:44:46,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi009_rmo.oepc.i [2024-06-27 18:44:46,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3f46d7d2/63043cc97cf14427b52faf843553af0c/FLAGd83976cdf [2024-06-27 18:44:46,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3f46d7d2/63043cc97cf14427b52faf843553af0c [2024-06-27 18:44:46,614 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:44:46,615 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:44:46,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi009_rmo.oepc.yml/witness.yml [2024-06-27 18:44:46,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:44:46,810 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:44:46,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:44:46,811 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:44:46,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:44:46,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:44:46" (1/2) ... [2024-06-27 18:44:46,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4318518b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:44:46, skipping insertion in model container [2024-06-27 18:44:46,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:44:46" (1/2) ... [2024-06-27 18:44:46,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ff314be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:44:46, skipping insertion in model container [2024-06-27 18:44:46,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:44:46" (2/2) ... [2024-06-27 18:44:46,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4318518b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:44:46, skipping insertion in model container [2024-06-27 18:44:46,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:44:46" (2/2) ... [2024-06-27 18:44:46,819 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:44:46,926 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:44:46,928 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$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 || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:44:46,928 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:44:46,928 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$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 || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:44:46,928 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:44:46,928 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-27 18:44:46,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:44:47,099 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/rfi009_rmo.oepc.i[992,1005] [2024-06-27 18:44:47,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:44:47,289 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:44:47,320 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/rfi009_rmo.oepc.i[992,1005] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:44:47,406 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:44:47,432 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:44:47,433 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:44:47 WrapperNode [2024-06-27 18:44:47,433 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:44:47,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:44:47,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:44:47,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:44:47,439 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,452 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,481 INFO L138 Inliner]: procedures = 175, calls = 73, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 171 [2024-06-27 18:44:47,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:44:47,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:44:47,482 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:44:47,482 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:44:47,491 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,491 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,495 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,523 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 18:44:47,523 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,523 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,548 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,550 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,551 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,553 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:44:47,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:44:47,589 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:44:47,589 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:44:47,589 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 06:44:47" (1/1) ... [2024-06-27 18:44:47,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:44:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:44:47,656 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 18:44:47,678 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 18:44:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:44:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:44:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:44:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:44:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:44:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:44:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:44:47,693 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:44:47,693 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:44:47,693 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:44:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:44:47,694 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:44:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:44:47,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:44:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:44:47,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:44:47,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:44:47,698 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 18:44:47,826 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:44:47,828 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:44:48,193 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:44:48,193 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:44:48,455 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:44:48,456 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:44:48,456 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:44:48 BoogieIcfgContainer [2024-06-27 18:44:48,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:44:48,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:44:48,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:44:48,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:44:48,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:44:46" (1/4) ... [2024-06-27 18:44:48,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b688284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:44:48, skipping insertion in model container [2024-06-27 18:44:48,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:44:46" (2/4) ... [2024-06-27 18:44:48,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b688284 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:44:48, skipping insertion in model container [2024-06-27 18:44:48,462 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 06:44:47" (3/4) ... [2024-06-27 18:44:48,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b688284 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:44:48, skipping insertion in model container [2024-06-27 18:44:48,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:44:48" (4/4) ... [2024-06-27 18:44:48,463 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi009_rmo.oepc.i [2024-06-27 18:44:48,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:44:48,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:44:48,477 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:44:48,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:44:48,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:44:48,590 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:44:48,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:44:48,595 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 62 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 18:44:48,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:44:48,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:44:48,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:44:48,626 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;@1a013a89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:44:48,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:44:48,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:44:48,631 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:44:48,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:44:48,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:48,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:44:48,632 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 18:44:48,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash 645073488, now seen corresponding path program 1 times [2024-06-27 18:44:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:48,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973960514] [2024-06-27 18:44:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:50,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973960514] [2024-06-27 18:44:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973960514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:50,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:44:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535761277] [2024-06-27 18:44:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:44:50,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:44:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:44:50,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:44:50,521 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 18:44:50,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:50,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:44:50,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:51,167 INFO L124 PetriNetUnfolderBase]: 2180/3510 cut-off events. [2024-06-27 18:44:51,168 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 18:44:51,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6763 conditions, 3510 events. 2180/3510 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20588 event pairs, 1319 based on Foata normal form. 0/3379 useless extension candidates. Maximal degree in co-relation 6751. Up to 3184 conditions per place. [2024-06-27 18:44:51,185 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:44:51,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-27 18:44:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:44:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:44:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 18:44:51,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 18:44:51,196 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-27 18:44:51,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-27 18:44:51,198 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 18:44:51,200 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:44:51,201 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 18:44:51,203 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:44:51,204 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:44:51,204 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 18:44:51,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:51,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:44:51,204 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 18:44:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1440604863, now seen corresponding path program 1 times [2024-06-27 18:44:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165981636] [2024-06-27 18:44:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:51,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:44:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165981636] [2024-06-27 18:44:53,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165981636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:53,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:53,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:44:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105284173] [2024-06-27 18:44:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:53,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:44:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:44:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:44:53,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:44:53,350 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 18:44:53,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:53,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:44:53,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:54,069 INFO L124 PetriNetUnfolderBase]: 2174/3369 cut-off events. [2024-06-27 18:44:54,069 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2024-06-27 18:44:54,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7488 conditions, 3369 events. 2174/3369 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19088 event pairs, 893 based on Foata normal form. 3/3367 useless extension candidates. Maximal degree in co-relation 7476. Up to 3142 conditions per place. [2024-06-27 18:44:54,084 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:44:54,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-27 18:44:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:44:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:44:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 18:44:54,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 18:44:54,087 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-27 18:44:54,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-27 18:44:54,089 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 18:44:54,090 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:44:54,090 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 18:44:54,091 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:44:54,091 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:44:54,091 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 18:44:54,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:54,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:54,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:44:54,092 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 18:44:54,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:54,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1747644217, now seen corresponding path program 1 times [2024-06-27 18:44:54,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:54,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402320218] [2024-06-27 18:44:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:56,725 INFO 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 18:44:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402320218] [2024-06-27 18:44:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402320218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:44:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314955461] [2024-06-27 18:44:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:44:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:56,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:44:56,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:44:56,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:44:56,756 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 18:44:56,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:56,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:44:56,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:44:57,925 INFO L124 PetriNetUnfolderBase]: 2769/4218 cut-off events. [2024-06-27 18:44:57,926 INFO L125 PetriNetUnfolderBase]: For 2294/2294 co-relation queries the response was YES. [2024-06-27 18:44:57,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10491 conditions, 4218 events. 2769/4218 cut-off events. For 2294/2294 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23294 event pairs, 709 based on Foata normal form. 6/4217 useless extension candidates. Maximal degree in co-relation 10476. Up to 3890 conditions per place. [2024-06-27 18:44:57,949 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-27 18:44:57,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-27 18:44:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:44:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:44:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:44:57,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:44:57,954 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:44:57,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-27 18:44:57,958 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 18:44:57,959 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:44:57,959 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 18:44:57,960 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:44:57,961 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:44:57,961 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 18:44:57,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:44:57,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:44:57,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:44:57,962 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 18:44:57,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:44:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1829013855, now seen corresponding path program 1 times [2024-06-27 18:44:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:44:57,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028337844] [2024-06-27 18:44:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:44:57,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:44:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:44:59,195 INFO 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 18:44:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:44:59,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028337844] [2024-06-27 18:44:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028337844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:44:59,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:44:59,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:44:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642445083] [2024-06-27 18:44:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:44:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:44:59,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:44:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:44:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:44:59,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:44:59,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 18:44:59,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:44:59,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:44:59,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:00,335 INFO L124 PetriNetUnfolderBase]: 3369/5246 cut-off events. [2024-06-27 18:45:00,337 INFO L125 PetriNetUnfolderBase]: For 4580/4580 co-relation queries the response was YES. [2024-06-27 18:45:00,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13779 conditions, 5246 events. 3369/5246 cut-off events. For 4580/4580 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30052 event pairs, 1410 based on Foata normal form. 2/5241 useless extension candidates. Maximal degree in co-relation 13759. Up to 4845 conditions per place. [2024-06-27 18:45:00,368 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 64 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-06-27 18:45:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 476 flow [2024-06-27 18:45:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:45:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:45:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 18:45:00,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:45:00,370 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 120 transitions. [2024-06-27 18:45:00,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 476 flow [2024-06-27 18:45:00,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 447 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:00,377 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 286 flow [2024-06-27 18:45:00,377 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 18:45:00,379 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 12 predicate places. [2024-06-27 18:45:00,379 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 286 flow [2024-06-27 18:45:00,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 18:45:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:00,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:45:00,380 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 18:45:00,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash 864855944, now seen corresponding path program 1 times [2024-06-27 18:45:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120441334] [2024-06-27 18:45:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:00,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:01,979 INFO 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 18:45:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120441334] [2024-06-27 18:45:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120441334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:01,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:45:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641974141] [2024-06-27 18:45:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:01,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:45:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:45:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:45:02,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:02,004 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 18:45:02,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:02,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:02,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:03,389 INFO L124 PetriNetUnfolderBase]: 3359/5236 cut-off events. [2024-06-27 18:45:03,389 INFO L125 PetriNetUnfolderBase]: For 6384/6384 co-relation queries the response was YES. [2024-06-27 18:45:03,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14696 conditions, 5236 events. 3359/5236 cut-off events. For 6384/6384 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 29954 event pairs, 1324 based on Foata normal form. 4/5238 useless extension candidates. Maximal degree in co-relation 14674. Up to 4793 conditions per place. [2024-06-27 18:45:03,421 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 18:45:03,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 560 flow [2024-06-27 18:45:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:45:03,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:45:03,426 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 286 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:45:03,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 560 flow [2024-06-27 18:45:03,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 533 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:03,438 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 330 flow [2024-06-27 18:45:03,438 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 18:45:03,441 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2024-06-27 18:45:03,441 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 330 flow [2024-06-27 18:45:03,441 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 18:45:03,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:03,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:03,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:45:03,442 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 18:45:03,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 190324674, now seen corresponding path program 1 times [2024-06-27 18:45:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:03,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334006111] [2024-06-27 18:45:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:03,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:05,762 INFO 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 18:45:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334006111] [2024-06-27 18:45:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334006111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:05,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:45:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778056206] [2024-06-27 18:45:05,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:45:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:45:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:45:05,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:05,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 330 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 18:45:05,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:05,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:05,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:07,131 INFO L124 PetriNetUnfolderBase]: 3390/5050 cut-off events. [2024-06-27 18:45:07,132 INFO L125 PetriNetUnfolderBase]: For 9138/9144 co-relation queries the response was YES. [2024-06-27 18:45:07,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15684 conditions, 5050 events. 3390/5050 cut-off events. For 9138/9144 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27490 event pairs, 1094 based on Foata normal form. 6/5053 useless extension candidates. Maximal degree in co-relation 15661. Up to 4789 conditions per place. [2024-06-27 18:45:07,151 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 86 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-27 18:45:07,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 114 transitions, 736 flow [2024-06-27 18:45:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 18:45:07,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-27 18:45:07,153 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 330 flow. Second operand 6 states and 155 transitions. [2024-06-27 18:45:07,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 114 transitions, 736 flow [2024-06-27 18:45:07,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 695 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:07,161 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 424 flow [2024-06-27 18:45:07,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 18:45:07,161 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2024-06-27 18:45:07,162 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 424 flow [2024-06-27 18:45:07,162 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 18:45:07,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:07,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:45:07,162 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 18:45:07,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2071194560, now seen corresponding path program 2 times [2024-06-27 18:45:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:07,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494747056] [2024-06-27 18:45:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:08,962 INFO 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 18:45:08,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:08,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494747056] [2024-06-27 18:45:08,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494747056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:08,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:08,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:45:08,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116077060] [2024-06-27 18:45:08,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:08,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:45:08,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:08,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:45:08,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:45:09,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:09,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 424 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 18:45:09,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:09,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:10,368 INFO L124 PetriNetUnfolderBase]: 3385/5044 cut-off events. [2024-06-27 18:45:10,368 INFO L125 PetriNetUnfolderBase]: For 12472/12478 co-relation queries the response was YES. [2024-06-27 18:45:10,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16791 conditions, 5044 events. 3385/5044 cut-off events. For 12472/12478 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27426 event pairs, 1098 based on Foata normal form. 6/5046 useless extension candidates. Maximal degree in co-relation 16766. Up to 4784 conditions per place. [2024-06-27 18:45:10,391 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 81 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-27 18:45:10,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 728 flow [2024-06-27 18:45:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:45:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:45:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 18:45:10,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283687943262412 [2024-06-27 18:45:10,393 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 424 flow. Second operand 6 states and 149 transitions. [2024-06-27 18:45:10,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 728 flow [2024-06-27 18:45:10,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 710 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 18:45:10,403 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 457 flow [2024-06-27 18:45:10,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-27 18:45:10,403 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:45:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 457 flow [2024-06-27 18:45:10,404 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 18:45:10,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:10,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:10,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:45:10,404 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 18:45:10,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash 595146027, now seen corresponding path program 1 times [2024-06-27 18:45:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:10,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324836640] [2024-06-27 18:45:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:12,318 INFO 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 18:45:12,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:12,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324836640] [2024-06-27 18:45:12,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324836640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:12,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631966361] [2024-06-27 18:45:12,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:12,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:12,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:12,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:12,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:12,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 457 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 18:45:12,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:12,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:12,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:13,796 INFO L124 PetriNetUnfolderBase]: 3515/5248 cut-off events. [2024-06-27 18:45:13,797 INFO L125 PetriNetUnfolderBase]: For 13555/13559 co-relation queries the response was YES. [2024-06-27 18:45:13,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17704 conditions, 5248 events. 3515/5248 cut-off events. For 13555/13559 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28544 event pairs, 1087 based on Foata normal form. 6/5252 useless extension candidates. Maximal degree in co-relation 17676. Up to 4930 conditions per place. [2024-06-27 18:45:13,821 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 115 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-27 18:45:13,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 150 transitions, 1017 flow [2024-06-27 18:45:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:45:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:45:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:45:13,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:45:13,823 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 457 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:45:13,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 150 transitions, 1017 flow [2024-06-27 18:45:13,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 150 transitions, 969 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:13,833 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 612 flow [2024-06-27 18:45:13,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=612, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-27 18:45:13,834 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2024-06-27 18:45:13,834 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 612 flow [2024-06-27 18:45:13,834 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 18:45:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:13,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:13,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:45:13,834 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 18:45:13,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash -417850129, now seen corresponding path program 2 times [2024-06-27 18:45:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442664335] [2024-06-27 18:45:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:13,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:16,852 INFO 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 18:45:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442664335] [2024-06-27 18:45:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442664335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:16,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:16,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874691015] [2024-06-27 18:45:16,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:16,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:16,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 612 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 18:45:16,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:16,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:16,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:18,301 INFO L124 PetriNetUnfolderBase]: 3546/5303 cut-off events. [2024-06-27 18:45:18,301 INFO L125 PetriNetUnfolderBase]: For 17208/17216 co-relation queries the response was YES. [2024-06-27 18:45:18,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19130 conditions, 5303 events. 3546/5303 cut-off events. For 17208/17216 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 28932 event pairs, 1046 based on Foata normal form. 10/5311 useless extension candidates. Maximal degree in co-relation 19099. Up to 4938 conditions per place. [2024-06-27 18:45:18,328 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 110 selfloop transitions, 29 changer transitions 0/146 dead transitions. [2024-06-27 18:45:18,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 146 transitions, 1094 flow [2024-06-27 18:45:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:45:18,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:45:18,330 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 612 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:45:18,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 146 transitions, 1094 flow [2024-06-27 18:45:18,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 146 transitions, 1044 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:45:18,346 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 669 flow [2024-06-27 18:45:18,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-27 18:45:18,347 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-06-27 18:45:18,347 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 669 flow [2024-06-27 18:45:18,347 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 18:45:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:45:18,347 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 18:45:18,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2020538665, now seen corresponding path program 1 times [2024-06-27 18:45:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743085441] [2024-06-27 18:45:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:20,605 INFO 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 18:45:20,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743085441] [2024-06-27 18:45:20,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743085441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:20,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:20,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:20,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663903400] [2024-06-27 18:45:20,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:20,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:20,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:20,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 669 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 18:45:20,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:20,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:22,197 INFO L124 PetriNetUnfolderBase]: 3608/5390 cut-off events. [2024-06-27 18:45:22,197 INFO L125 PetriNetUnfolderBase]: For 21698/21706 co-relation queries the response was YES. [2024-06-27 18:45:22,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 5390 events. 3608/5390 cut-off events. For 21698/21706 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 29245 event pairs, 959 based on Foata normal form. 12/5396 useless extension candidates. Maximal degree in co-relation 20419. Up to 4904 conditions per place. [2024-06-27 18:45:22,223 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 117 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-27 18:45:22,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 157 transitions, 1267 flow [2024-06-27 18:45:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 18:45:22,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623100303951368 [2024-06-27 18:45:22,225 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 669 flow. Second operand 7 states and 185 transitions. [2024-06-27 18:45:22,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 157 transitions, 1267 flow [2024-06-27 18:45:22,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 157 transitions, 1188 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:22,245 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 777 flow [2024-06-27 18:45:22,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=777, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-27 18:45:22,246 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2024-06-27 18:45:22,246 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 777 flow [2024-06-27 18:45:22,246 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 18:45:22,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:22,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:22,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:45:22,246 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 18:45:22,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:22,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2020538479, now seen corresponding path program 3 times [2024-06-27 18:45:22,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:22,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314567730] [2024-06-27 18:45:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:22,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314567730] [2024-06-27 18:45:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314567730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:24,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:24,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:24,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033068344] [2024-06-27 18:45:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:24,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:24,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:24,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 777 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 18:45:24,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:24,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:24,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:26,355 INFO L124 PetriNetUnfolderBase]: 3639/5445 cut-off events. [2024-06-27 18:45:26,355 INFO L125 PetriNetUnfolderBase]: For 22277/22288 co-relation queries the response was YES. [2024-06-27 18:45:26,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21037 conditions, 5445 events. 3639/5445 cut-off events. For 22277/22288 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 29708 event pairs, 1042 based on Foata normal form. 8/5450 useless extension candidates. Maximal degree in co-relation 21004. Up to 4938 conditions per place. [2024-06-27 18:45:26,381 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 108 selfloop transitions, 42 changer transitions 0/157 dead transitions. [2024-06-27 18:45:26,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 157 transitions, 1329 flow [2024-06-27 18:45:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:45:26,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:45:26,391 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 777 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:45:26,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 157 transitions, 1329 flow [2024-06-27 18:45:26,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 157 transitions, 1306 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 18:45:26,415 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 916 flow [2024-06-27 18:45:26,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-27 18:45:26,416 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 40 predicate places. [2024-06-27 18:45:26,416 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 916 flow [2024-06-27 18:45:26,416 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 18:45:26,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:26,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:26,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:45:26,417 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 18:45:26,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:26,417 INFO L85 PathProgramCache]: Analyzing trace with hash -217239643, now seen corresponding path program 2 times [2024-06-27 18:45:26,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:26,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384026952] [2024-06-27 18:45:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:26,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384026952] [2024-06-27 18:45:28,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384026952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:28,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:28,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347424050] [2024-06-27 18:45:28,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:28,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:28,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:28,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:28,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 916 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 18:45:28,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:28,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:28,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:30,030 INFO L124 PetriNetUnfolderBase]: 3701/5550 cut-off events. [2024-06-27 18:45:30,031 INFO L125 PetriNetUnfolderBase]: For 26094/26112 co-relation queries the response was YES. [2024-06-27 18:45:30,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22302 conditions, 5550 events. 3701/5550 cut-off events. For 26094/26112 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30395 event pairs, 944 based on Foata normal form. 16/5560 useless extension candidates. Maximal degree in co-relation 22266. Up to 4999 conditions per place. [2024-06-27 18:45:30,062 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 119 selfloop transitions, 37 changer transitions 0/163 dead transitions. [2024-06-27 18:45:30,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 163 transitions, 1472 flow [2024-06-27 18:45:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:45:30,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:45:30,064 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 916 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:45:30,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 163 transitions, 1472 flow [2024-06-27 18:45:30,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 163 transitions, 1427 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:30,086 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 984 flow [2024-06-27 18:45:30,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=984, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-27 18:45:30,087 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2024-06-27 18:45:30,087 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 984 flow [2024-06-27 18:45:30,087 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 18:45:30,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:30,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:30,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:45:30,088 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 18:45:30,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2097297111, now seen corresponding path program 3 times [2024-06-27 18:45:30,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:30,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708763881] [2024-06-27 18:45:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:32,420 INFO 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 18:45:32,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:32,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708763881] [2024-06-27 18:45:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708763881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:32,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115292252] [2024-06-27 18:45:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:32,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:32,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:32,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 984 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 18:45:32,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:32,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:32,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:34,080 INFO L124 PetriNetUnfolderBase]: 3691/5536 cut-off events. [2024-06-27 18:45:34,080 INFO L125 PetriNetUnfolderBase]: For 28071/28089 co-relation queries the response was YES. [2024-06-27 18:45:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22652 conditions, 5536 events. 3691/5536 cut-off events. For 28071/28089 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30323 event pairs, 942 based on Foata normal form. 16/5546 useless extension candidates. Maximal degree in co-relation 22614. Up to 4991 conditions per place. [2024-06-27 18:45:34,104 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 119 selfloop transitions, 36 changer transitions 0/162 dead transitions. [2024-06-27 18:45:34,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 162 transitions, 1466 flow [2024-06-27 18:45:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:45:34,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:45:34,106 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 984 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:45:34,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 162 transitions, 1466 flow [2024-06-27 18:45:34,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 162 transitions, 1374 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:34,132 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 972 flow [2024-06-27 18:45:34,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-27 18:45:34,133 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 46 predicate places. [2024-06-27 18:45:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 972 flow [2024-06-27 18:45:34,133 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 18:45:34,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:34,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:34,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:45:34,134 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 18:45:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2097297297, now seen corresponding path program 4 times [2024-06-27 18:45:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:34,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952067837] [2024-06-27 18:45:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:34,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:36,370 INFO 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 18:45:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:36,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952067837] [2024-06-27 18:45:36,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952067837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:45:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910158225] [2024-06-27 18:45:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:45:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:45:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:45:36,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:36,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 972 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 18:45:36,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:36,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:36,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:37,945 INFO L124 PetriNetUnfolderBase]: 3686/5516 cut-off events. [2024-06-27 18:45:37,946 INFO L125 PetriNetUnfolderBase]: For 29441/29449 co-relation queries the response was YES. [2024-06-27 18:45:37,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22588 conditions, 5516 events. 3686/5516 cut-off events. For 29441/29449 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 30061 event pairs, 1051 based on Foata normal form. 3/5507 useless extension candidates. Maximal degree in co-relation 22550. Up to 5005 conditions per place. [2024-06-27 18:45:37,974 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 107 selfloop transitions, 42 changer transitions 0/156 dead transitions. [2024-06-27 18:45:37,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1418 flow [2024-06-27 18:45:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:45:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:45:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:45:37,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:45:37,976 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 972 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:45:37,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1418 flow [2024-06-27 18:45:37,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1341 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:45:37,997 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 987 flow [2024-06-27 18:45:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=987, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2024-06-27 18:45:37,998 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2024-06-27 18:45:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 987 flow [2024-06-27 18:45:37,998 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 18:45:37,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:37,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:37,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:45:37,999 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 18:45:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:37,999 INFO L85 PathProgramCache]: Analyzing trace with hash 855216960, now seen corresponding path program 1 times [2024-06-27 18:45:37,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:37,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526670134] [2024-06-27 18:45:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:37,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:42,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526670134] [2024-06-27 18:45:42,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526670134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:42,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:42,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:42,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345035426] [2024-06-27 18:45:42,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:42,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:42,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:42,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:42,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:42,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 987 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 18:45:42,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:42,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:42,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:44,295 INFO L124 PetriNetUnfolderBase]: 3748/5633 cut-off events. [2024-06-27 18:45:44,295 INFO L125 PetriNetUnfolderBase]: For 31936/31944 co-relation queries the response was YES. [2024-06-27 18:45:44,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 5633 events. 3748/5633 cut-off events. For 31936/31944 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31095 event pairs, 992 based on Foata normal form. 12/5643 useless extension candidates. Maximal degree in co-relation 23157. Up to 5160 conditions per place. [2024-06-27 18:45:44,324 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 140 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-27 18:45:44,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 179 transitions, 1575 flow [2024-06-27 18:45:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:45:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:45:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:45:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:45:44,327 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 987 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:45:44,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 179 transitions, 1575 flow [2024-06-27 18:45:44,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1463 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:45:44,356 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 988 flow [2024-06-27 18:45:44,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-27 18:45:44,357 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 50 predicate places. [2024-06-27 18:45:44,357 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 988 flow [2024-06-27 18:45:44,357 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 18:45:44,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:44,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:44,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:45:44,357 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 18:45:44,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:44,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1787815304, now seen corresponding path program 2 times [2024-06-27 18:45:44,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:44,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192046965] [2024-06-27 18:45:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:47,039 INFO 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 18:45:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192046965] [2024-06-27 18:45:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192046965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:47,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:47,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:47,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143023915] [2024-06-27 18:45:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:47,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:47,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 988 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 18:45:47,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:47,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:47,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:49,025 INFO L124 PetriNetUnfolderBase]: 3882/5844 cut-off events. [2024-06-27 18:45:49,026 INFO L125 PetriNetUnfolderBase]: For 38287/38289 co-relation queries the response was YES. [2024-06-27 18:45:49,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 5844 events. 3882/5844 cut-off events. For 38287/38289 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32444 event pairs, 906 based on Foata normal form. 4/5842 useless extension candidates. Maximal degree in co-relation 25014. Up to 4813 conditions per place. [2024-06-27 18:45:49,060 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 123 selfloop transitions, 60 changer transitions 0/190 dead transitions. [2024-06-27 18:45:49,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 1786 flow [2024-06-27 18:45:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:45:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:45:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-27 18:45:49,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-06-27 18:45:49,062 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 988 flow. Second operand 8 states and 218 transitions. [2024-06-27 18:45:49,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 1786 flow [2024-06-27 18:45:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 190 transitions, 1707 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 18:45:49,101 INFO L231 Difference]: Finished difference. Result has 103 places, 120 transitions, 1163 flow [2024-06-27 18:45:49,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=103, PETRI_TRANSITIONS=120} [2024-06-27 18:45:49,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 52 predicate places. [2024-06-27 18:45:49,101 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 120 transitions, 1163 flow [2024-06-27 18:45:49,102 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 18:45:49,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:49,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:45:49,102 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 18:45:49,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 839949964, now seen corresponding path program 3 times [2024-06-27 18:45:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:49,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136741917] [2024-06-27 18:45:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:45:52,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136741917] [2024-06-27 18:45:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136741917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:52,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:52,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875337659] [2024-06-27 18:45:52,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:52,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:52,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:52,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 120 transitions, 1163 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 18:45:52,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:52,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:52,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:54,255 INFO L124 PetriNetUnfolderBase]: 3872/5830 cut-off events. [2024-06-27 18:45:54,255 INFO L125 PetriNetUnfolderBase]: For 43816/43818 co-relation queries the response was YES. [2024-06-27 18:45:54,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25935 conditions, 5830 events. 3872/5830 cut-off events. For 43816/43818 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32395 event pairs, 906 based on Foata normal form. 4/5828 useless extension candidates. Maximal degree in co-relation 25894. Up to 4805 conditions per place. [2024-06-27 18:45:54,292 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 118 selfloop transitions, 62 changer transitions 0/187 dead transitions. [2024-06-27 18:45:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1777 flow [2024-06-27 18:45:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:45:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:45:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 18:45:54,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-06-27 18:45:54,294 INFO L175 Difference]: Start difference. First operand has 103 places, 120 transitions, 1163 flow. Second operand 8 states and 214 transitions. [2024-06-27 18:45:54,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1777 flow [2024-06-27 18:45:54,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1695 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 18:45:54,355 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1213 flow [2024-06-27 18:45:54,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1213, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2024-06-27 18:45:54,356 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 18:45:54,356 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1213 flow [2024-06-27 18:45:54,356 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 18:45:54,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:54,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:54,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:45:54,357 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 18:45:54,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1848149530, now seen corresponding path program 4 times [2024-06-27 18:45:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767592117] [2024-06-27 18:45:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:54,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:45:56,941 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 18:45:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:45:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767592117] [2024-06-27 18:45:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767592117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:45:56,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:45:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:45:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966405595] [2024-06-27 18:45:56,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:45:56,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:45:56,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:45:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:45:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:45:56,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:45:56,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1213 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 18:45:56,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:45:56,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:45:56,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:45:58,877 INFO L124 PetriNetUnfolderBase]: 3934/5936 cut-off events. [2024-06-27 18:45:58,878 INFO L125 PetriNetUnfolderBase]: For 47484/47492 co-relation queries the response was YES. [2024-06-27 18:45:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26971 conditions, 5936 events. 3934/5936 cut-off events. For 47484/47492 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 33134 event pairs, 903 based on Foata normal form. 5/5929 useless extension candidates. Maximal degree in co-relation 26928. Up to 4857 conditions per place. [2024-06-27 18:45:58,910 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 117 selfloop transitions, 64 changer transitions 0/188 dead transitions. [2024-06-27 18:45:58,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 188 transitions, 1885 flow [2024-06-27 18:45:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:45:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:45:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:45:58,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:45:58,912 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1213 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:45:58,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 188 transitions, 1885 flow [2024-06-27 18:45:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 188 transitions, 1779 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:45:58,949 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1295 flow [2024-06-27 18:45:58,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1295, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-27 18:45:58,950 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 59 predicate places. [2024-06-27 18:45:58,950 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1295 flow [2024-06-27 18:45:58,950 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 18:45:58,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:45:58,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:45:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:45:58,951 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 18:45:58,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:45:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash -584348250, now seen corresponding path program 5 times [2024-06-27 18:45:58,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:45:58,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740320491] [2024-06-27 18:45:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:45:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:45:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:01,476 INFO 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 18:46:01,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:01,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740320491] [2024-06-27 18:46:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740320491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:01,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:01,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:01,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843458892] [2024-06-27 18:46:01,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:01,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:01,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:01,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:01,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:01,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:01,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1295 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 18:46:01,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:01,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:01,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:03,372 INFO L124 PetriNetUnfolderBase]: 3996/6044 cut-off events. [2024-06-27 18:46:03,372 INFO L125 PetriNetUnfolderBase]: For 53434/53442 co-relation queries the response was YES. [2024-06-27 18:46:03,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27780 conditions, 6044 events. 3996/6044 cut-off events. For 53434/53442 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33950 event pairs, 915 based on Foata normal form. 5/6037 useless extension candidates. Maximal degree in co-relation 27736. Up to 4909 conditions per place. [2024-06-27 18:46:03,408 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 113 selfloop transitions, 70 changer transitions 0/190 dead transitions. [2024-06-27 18:46:03,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 1976 flow [2024-06-27 18:46:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:46:03,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:46:03,409 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1295 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:46:03,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 1976 flow [2024-06-27 18:46:03,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 190 transitions, 1746 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 18:46:03,463 INFO L231 Difference]: Finished difference. Result has 111 places, 126 transitions, 1268 flow [2024-06-27 18:46:03,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=111, PETRI_TRANSITIONS=126} [2024-06-27 18:46:03,464 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-27 18:46:03,464 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 126 transitions, 1268 flow [2024-06-27 18:46:03,464 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 18:46:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:03,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:03,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:46:03,464 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 18:46:03,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash -591699900, now seen corresponding path program 6 times [2024-06-27 18:46:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946630222] [2024-06-27 18:46:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:05,963 INFO 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 18:46:05,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946630222] [2024-06-27 18:46:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946630222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:05,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800899032] [2024-06-27 18:46:05,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:06,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 126 transitions, 1268 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 18:46:06,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:06,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:07,850 INFO L124 PetriNetUnfolderBase]: 3986/6030 cut-off events. [2024-06-27 18:46:07,850 INFO L125 PetriNetUnfolderBase]: For 49951/49959 co-relation queries the response was YES. [2024-06-27 18:46:07,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27471 conditions, 6030 events. 3986/6030 cut-off events. For 49951/49959 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33873 event pairs, 905 based on Foata normal form. 5/6023 useless extension candidates. Maximal degree in co-relation 27426. Up to 4901 conditions per place. [2024-06-27 18:46:07,887 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 116 selfloop transitions, 66 changer transitions 0/189 dead transitions. [2024-06-27 18:46:07,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 189 transitions, 1822 flow [2024-06-27 18:46:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:46:07,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:46:07,889 INFO L175 Difference]: Start difference. First operand has 111 places, 126 transitions, 1268 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:46:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 189 transitions, 1822 flow [2024-06-27 18:46:07,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 189 transitions, 1683 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:07,949 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1269 flow [2024-06-27 18:46:07,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1269, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-27 18:46:07,950 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 63 predicate places. [2024-06-27 18:46:07,950 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1269 flow [2024-06-27 18:46:07,950 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 18:46:07,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:07,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:46:07,950 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 18:46:07,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -584071203, now seen corresponding path program 1 times [2024-06-27 18:46:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:07,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54301464] [2024-06-27 18:46:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:07,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:10,624 INFO 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 18:46:10,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54301464] [2024-06-27 18:46:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54301464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:10,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:10,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005064927] [2024-06-27 18:46:10,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:10,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:10,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:10,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:10,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1269 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 18:46:10,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:10,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:10,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:12,405 INFO L124 PetriNetUnfolderBase]: 3978/6256 cut-off events. [2024-06-27 18:46:12,406 INFO L125 PetriNetUnfolderBase]: For 52233/52235 co-relation queries the response was YES. [2024-06-27 18:46:12,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27488 conditions, 6256 events. 3978/6256 cut-off events. For 52233/52235 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 36594 event pairs, 1188 based on Foata normal form. 4/6258 useless extension candidates. Maximal degree in co-relation 27442. Up to 5616 conditions per place. [2024-06-27 18:46:12,443 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 155 selfloop transitions, 21 changer transitions 0/183 dead transitions. [2024-06-27 18:46:12,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 1831 flow [2024-06-27 18:46:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 18:46:12,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:46:12,444 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1269 flow. Second operand 8 states and 192 transitions. [2024-06-27 18:46:12,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 1831 flow [2024-06-27 18:46:12,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 1652 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:46:12,486 INFO L231 Difference]: Finished difference. Result has 115 places, 133 transitions, 1229 flow [2024-06-27 18:46:12,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1229, PETRI_PLACES=115, PETRI_TRANSITIONS=133} [2024-06-27 18:46:12,487 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:46:12,487 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 133 transitions, 1229 flow [2024-06-27 18:46:12,487 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 18:46:12,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:12,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:12,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:46:12,487 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:12,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash 257641983, now seen corresponding path program 1 times [2024-06-27 18:46:12,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:12,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382191074] [2024-06-27 18:46:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:13,675 INFO 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 18:46:13,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:13,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382191074] [2024-06-27 18:46:13,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382191074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:13,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:13,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:46:13,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831373280] [2024-06-27 18:46:13,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:13,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:46:13,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:46:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:46:13,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:46:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 133 transitions, 1229 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:46:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:46:13,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:14,885 INFO L124 PetriNetUnfolderBase]: 3407/5581 cut-off events. [2024-06-27 18:46:14,885 INFO L125 PetriNetUnfolderBase]: For 51855/51882 co-relation queries the response was YES. [2024-06-27 18:46:14,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24836 conditions, 5581 events. 3407/5581 cut-off events. For 51855/51882 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34187 event pairs, 1102 based on Foata normal form. 27/5549 useless extension candidates. Maximal degree in co-relation 24788. Up to 4788 conditions per place. [2024-06-27 18:46:14,923 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 122 selfloop transitions, 10 changer transitions 0/156 dead transitions. [2024-06-27 18:46:14,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 156 transitions, 1577 flow [2024-06-27 18:46:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:46:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:46:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 18:46:14,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-27 18:46:14,925 INFO L175 Difference]: Start difference. First operand has 115 places, 133 transitions, 1229 flow. Second operand 5 states and 124 transitions. [2024-06-27 18:46:14,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 156 transitions, 1577 flow [2024-06-27 18:46:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 156 transitions, 1503 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:14,983 INFO L231 Difference]: Finished difference. Result has 115 places, 137 transitions, 1224 flow [2024-06-27 18:46:14,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1224, PETRI_PLACES=115, PETRI_TRANSITIONS=137} [2024-06-27 18:46:14,984 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:46:14,984 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 137 transitions, 1224 flow [2024-06-27 18:46:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:46:14,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:14,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:14,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:46:14,984 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 18:46:14,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:14,984 INFO L85 PathProgramCache]: Analyzing trace with hash 488478600, now seen corresponding path program 1 times [2024-06-27 18:46:14,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:14,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231176365] [2024-06-27 18:46:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:17,838 INFO 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 18:46:17,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:17,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231176365] [2024-06-27 18:46:17,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231176365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:17,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:17,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107904714] [2024-06-27 18:46:17,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:17,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:17,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:17,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 137 transitions, 1224 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 18:46:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:17,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:19,657 INFO L124 PetriNetUnfolderBase]: 4080/6191 cut-off events. [2024-06-27 18:46:19,657 INFO L125 PetriNetUnfolderBase]: For 59956/59964 co-relation queries the response was YES. [2024-06-27 18:46:19,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29207 conditions, 6191 events. 4080/6191 cut-off events. For 59956/59964 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 35000 event pairs, 608 based on Foata normal form. 12/6201 useless extension candidates. Maximal degree in co-relation 29158. Up to 5476 conditions per place. [2024-06-27 18:46:19,695 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 181 selfloop transitions, 35 changer transitions 0/223 dead transitions. [2024-06-27 18:46:19,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 223 transitions, 2080 flow [2024-06-27 18:46:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:46:19,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508274231678487 [2024-06-27 18:46:19,696 INFO L175 Difference]: Start difference. First operand has 115 places, 137 transitions, 1224 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:46:19,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 223 transitions, 2080 flow [2024-06-27 18:46:19,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 223 transitions, 2039 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:46:19,755 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 1336 flow [2024-06-27 18:46:19,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1336, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-06-27 18:46:19,755 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-27 18:46:19,756 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 1336 flow [2024-06-27 18:46:19,756 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 18:46:19,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:19,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:19,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:46:19,756 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 18:46:19,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash 602158080, now seen corresponding path program 2 times [2024-06-27 18:46:19,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:19,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950409370] [2024-06-27 18:46:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:19,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950409370] [2024-06-27 18:46:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950409370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:22,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:22,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:22,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4999886] [2024-06-27 18:46:22,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:22,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:22,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:22,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 1336 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 18:46:22,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:22,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:24,301 INFO L124 PetriNetUnfolderBase]: 4072/6179 cut-off events. [2024-06-27 18:46:24,301 INFO L125 PetriNetUnfolderBase]: For 64773/64781 co-relation queries the response was YES. [2024-06-27 18:46:24,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29807 conditions, 6179 events. 4072/6179 cut-off events. For 64773/64781 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34937 event pairs, 890 based on Foata normal form. 12/6189 useless extension candidates. Maximal degree in co-relation 29757. Up to 5618 conditions per place. [2024-06-27 18:46:24,343 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 171 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-06-27 18:46:24,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 209 transitions, 1966 flow [2024-06-27 18:46:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:46:24,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:46:24,345 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 1336 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:46:24,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 209 transitions, 1966 flow [2024-06-27 18:46:24,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 209 transitions, 1887 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:24,435 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1327 flow [2024-06-27 18:46:24,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2024-06-27 18:46:24,435 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 73 predicate places. [2024-06-27 18:46:24,435 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1327 flow [2024-06-27 18:46:24,436 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 18:46:24,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:24,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:46:24,436 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 18:46:24,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 606626730, now seen corresponding path program 3 times [2024-06-27 18:46:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:24,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113616768] [2024-06-27 18:46:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:27,085 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 18:46:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113616768] [2024-06-27 18:46:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113616768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:27,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270587242] [2024-06-27 18:46:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:27,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1327 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 18:46:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:27,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:27,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:28,975 INFO L124 PetriNetUnfolderBase]: 4122/6244 cut-off events. [2024-06-27 18:46:28,975 INFO L125 PetriNetUnfolderBase]: For 69151/69162 co-relation queries the response was YES. [2024-06-27 18:46:28,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 6244 events. 4122/6244 cut-off events. For 69151/69162 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35265 event pairs, 900 based on Foata normal form. 10/6251 useless extension candidates. Maximal degree in co-relation 30276. Up to 5577 conditions per place. [2024-06-27 18:46:29,019 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 154 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2024-06-27 18:46:29,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 205 transitions, 1963 flow [2024-06-27 18:46:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:46:29,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:46:29,021 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1327 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:46:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 205 transitions, 1963 flow [2024-06-27 18:46:29,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 205 transitions, 1894 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 18:46:29,104 INFO L231 Difference]: Finished difference. Result has 125 places, 143 transitions, 1397 flow [2024-06-27 18:46:29,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1397, PETRI_PLACES=125, PETRI_TRANSITIONS=143} [2024-06-27 18:46:29,105 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2024-06-27 18:46:29,105 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 143 transitions, 1397 flow [2024-06-27 18:46:29,105 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 18:46:29,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:29,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:29,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:46:29,106 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 18:46:29,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:29,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1082846422, now seen corresponding path program 4 times [2024-06-27 18:46:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755726009] [2024-06-27 18:46:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:31,757 INFO 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 18:46:31,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:31,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755726009] [2024-06-27 18:46:31,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755726009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:31,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:31,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:46:31,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626178198] [2024-06-27 18:46:31,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:31,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:46:31,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:31,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:46:31,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:46:31,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:31,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 143 transitions, 1397 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 18:46:31,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:31,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:33,662 INFO L124 PetriNetUnfolderBase]: 4114/6230 cut-off events. [2024-06-27 18:46:33,662 INFO L125 PetriNetUnfolderBase]: For 73754/73762 co-relation queries the response was YES. [2024-06-27 18:46:33,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30727 conditions, 6230 events. 4114/6230 cut-off events. For 73754/73762 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35010 event pairs, 915 based on Foata normal form. 5/6223 useless extension candidates. Maximal degree in co-relation 30674. Up to 5565 conditions per place. [2024-06-27 18:46:33,703 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 154 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2024-06-27 18:46:33,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 205 transitions, 2041 flow [2024-06-27 18:46:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:46:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:46:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:46:33,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:46:33,705 INFO L175 Difference]: Start difference. First operand has 125 places, 143 transitions, 1397 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:46:33,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 205 transitions, 2041 flow [2024-06-27 18:46:33,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 205 transitions, 1930 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:33,776 INFO L231 Difference]: Finished difference. Result has 127 places, 145 transitions, 1429 flow [2024-06-27 18:46:33,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1429, PETRI_PLACES=127, PETRI_TRANSITIONS=145} [2024-06-27 18:46:33,776 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 76 predicate places. [2024-06-27 18:46:33,776 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 145 transitions, 1429 flow [2024-06-27 18:46:33,776 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 18:46:33,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:33,777 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 18:46:33,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:46:33,777 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 18:46:33,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1355017441, now seen corresponding path program 1 times [2024-06-27 18:46:33,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557366622] [2024-06-27 18:46:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:37,320 INFO 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 18:46:37,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557366622] [2024-06-27 18:46:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557366622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:37,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:46:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324095535] [2024-06-27 18:46:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:37,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:46:37,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:46:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:46:37,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:37,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 145 transitions, 1429 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 18:46:37,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:37,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:37,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:39,280 INFO L124 PetriNetUnfolderBase]: 4552/6943 cut-off events. [2024-06-27 18:46:39,280 INFO L125 PetriNetUnfolderBase]: For 104903/104911 co-relation queries the response was YES. [2024-06-27 18:46:39,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35719 conditions, 6943 events. 4552/6943 cut-off events. For 104903/104911 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 40374 event pairs, 660 based on Foata normal form. 24/6965 useless extension candidates. Maximal degree in co-relation 35665. Up to 5544 conditions per place. [2024-06-27 18:46:39,330 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 205 selfloop transitions, 37 changer transitions 0/249 dead transitions. [2024-06-27 18:46:39,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 249 transitions, 2433 flow [2024-06-27 18:46:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:46:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:46:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 18:46:39,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2024-06-27 18:46:39,332 INFO L175 Difference]: Start difference. First operand has 127 places, 145 transitions, 1429 flow. Second operand 10 states and 266 transitions. [2024-06-27 18:46:39,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 249 transitions, 2433 flow [2024-06-27 18:46:39,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 249 transitions, 2318 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:39,447 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1460 flow [2024-06-27 18:46:39,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1460, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-27 18:46:39,448 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 80 predicate places. [2024-06-27 18:46:39,448 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1460 flow [2024-06-27 18:46:39,448 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 18:46:39,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:39,448 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 18:46:39,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:46:39,448 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 18:46:39,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -242224789, now seen corresponding path program 2 times [2024-06-27 18:46:39,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:39,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146899465] [2024-06-27 18:46:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:39,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:42,699 INFO 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 18:46:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:42,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146899465] [2024-06-27 18:46:42,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146899465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:42,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:46:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118825512] [2024-06-27 18:46:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:46:42,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:46:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:46:42,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:42,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1460 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 18:46:42,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:44,667 INFO L124 PetriNetUnfolderBase]: 4720/7211 cut-off events. [2024-06-27 18:46:44,667 INFO L125 PetriNetUnfolderBase]: For 116796/116804 co-relation queries the response was YES. [2024-06-27 18:46:44,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37516 conditions, 7211 events. 4720/7211 cut-off events. For 116796/116804 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 42170 event pairs, 1034 based on Foata normal form. 28/7237 useless extension candidates. Maximal degree in co-relation 37461. Up to 6312 conditions per place. [2024-06-27 18:46:44,718 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 192 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-27 18:46:44,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 232 transitions, 2240 flow [2024-06-27 18:46:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:46:44,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:46:44,719 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1460 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:46:44,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 232 transitions, 2240 flow [2024-06-27 18:46:44,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 232 transitions, 2175 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:46:44,852 INFO L231 Difference]: Finished difference. Result has 134 places, 148 transitions, 1504 flow [2024-06-27 18:46:44,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=134, PETRI_TRANSITIONS=148} [2024-06-27 18:46:44,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 83 predicate places. [2024-06-27 18:46:44,853 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 148 transitions, 1504 flow [2024-06-27 18:46:44,853 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 18:46:44,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:44,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:44,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:46:44,853 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 18:46:44,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:44,854 INFO L85 PathProgramCache]: Analyzing trace with hash 453530787, now seen corresponding path program 3 times [2024-06-27 18:46:44,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:44,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730831610] [2024-06-27 18:46:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:44,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:48,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:48,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730831610] [2024-06-27 18:46:48,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730831610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:48,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:48,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:46:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681378328] [2024-06-27 18:46:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:46:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:46:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:46:48,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:48,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 148 transitions, 1504 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 18:46:48,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:48,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:48,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:50,152 INFO L124 PetriNetUnfolderBase]: 4692/7167 cut-off events. [2024-06-27 18:46:50,152 INFO L125 PetriNetUnfolderBase]: For 107167/107175 co-relation queries the response was YES. [2024-06-27 18:46:50,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36660 conditions, 7167 events. 4692/7167 cut-off events. For 107167/107175 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 41822 event pairs, 966 based on Foata normal form. 24/7189 useless extension candidates. Maximal degree in co-relation 36603. Up to 5978 conditions per place. [2024-06-27 18:46:50,203 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 195 selfloop transitions, 34 changer transitions 0/236 dead transitions. [2024-06-27 18:46:50,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 236 transitions, 2276 flow [2024-06-27 18:46:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:46:50,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:46:50,205 INFO L175 Difference]: Start difference. First operand has 134 places, 148 transitions, 1504 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:46:50,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 236 transitions, 2276 flow [2024-06-27 18:46:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 236 transitions, 2201 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 18:46:50,328 INFO L231 Difference]: Finished difference. Result has 136 places, 148 transitions, 1503 flow [2024-06-27 18:46:50,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1503, PETRI_PLACES=136, PETRI_TRANSITIONS=148} [2024-06-27 18:46:50,329 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 85 predicate places. [2024-06-27 18:46:50,329 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 148 transitions, 1503 flow [2024-06-27 18:46:50,329 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 18:46:50,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:50,329 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 18:46:50,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:46:50,329 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:50,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -98190109, now seen corresponding path program 4 times [2024-06-27 18:46:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76160137] [2024-06-27 18:46:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:53,640 INFO 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 18:46:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76160137] [2024-06-27 18:46:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76160137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:53,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:46:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87892730] [2024-06-27 18:46:53,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:46:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:46:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:46:53,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:53,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 148 transitions, 1503 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 18:46:53,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:56,010 INFO L124 PetriNetUnfolderBase]: 4918/7516 cut-off events. [2024-06-27 18:46:56,010 INFO L125 PetriNetUnfolderBase]: For 118982/118987 co-relation queries the response was YES. [2024-06-27 18:46:56,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38840 conditions, 7516 events. 4918/7516 cut-off events. For 118982/118987 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 44289 event pairs, 966 based on Foata normal form. 20/7531 useless extension candidates. Maximal degree in co-relation 38782. Up to 6025 conditions per place. [2024-06-27 18:46:56,067 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 152 selfloop transitions, 71 changer transitions 0/230 dead transitions. [2024-06-27 18:46:56,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 230 transitions, 2265 flow [2024-06-27 18:46:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:46:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:46:56,068 INFO L175 Difference]: Start difference. First operand has 136 places, 148 transitions, 1503 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:46:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 230 transitions, 2265 flow [2024-06-27 18:46:56,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 230 transitions, 2177 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 18:46:56,207 INFO L231 Difference]: Finished difference. Result has 137 places, 149 transitions, 1600 flow [2024-06-27 18:46:56,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1600, PETRI_PLACES=137, PETRI_TRANSITIONS=149} [2024-06-27 18:46:56,207 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 18:46:56,208 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 149 transitions, 1600 flow [2024-06-27 18:46:56,208 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 18:46:56,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:56,208 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 18:46:56,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:46:56,208 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 18:46:56,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2084550629, now seen corresponding path program 5 times [2024-06-27 18:46:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130785722] [2024-06-27 18:46:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:59,366 INFO 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 18:46:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:59,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130785722] [2024-06-27 18:46:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130785722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:59,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:59,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:46:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241053551] [2024-06-27 18:46:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:46:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:46:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:46:59,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:59,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 149 transitions, 1600 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 18:46:59,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:59,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:59,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:01,700 INFO L124 PetriNetUnfolderBase]: 5144/7886 cut-off events. [2024-06-27 18:47:01,700 INFO L125 PetriNetUnfolderBase]: For 133536/133541 co-relation queries the response was YES. [2024-06-27 18:47:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41579 conditions, 7886 events. 5144/7886 cut-off events. For 133536/133541 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 47111 event pairs, 1018 based on Foata normal form. 20/7901 useless extension candidates. Maximal degree in co-relation 41520. Up to 6371 conditions per place. [2024-06-27 18:47:01,758 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 156 selfloop transitions, 69 changer transitions 0/232 dead transitions. [2024-06-27 18:47:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 232 transitions, 2372 flow [2024-06-27 18:47:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 18:47:01,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-06-27 18:47:01,759 INFO L175 Difference]: Start difference. First operand has 137 places, 149 transitions, 1600 flow. Second operand 9 states and 242 transitions. [2024-06-27 18:47:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 232 transitions, 2372 flow [2024-06-27 18:47:01,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 232 transitions, 2219 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:01,912 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 1630 flow [2024-06-27 18:47:01,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1630, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2024-06-27 18:47:01,913 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 88 predicate places. [2024-06-27 18:47:01,913 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 1630 flow [2024-06-27 18:47:01,913 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 18:47:01,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:01,913 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 18:47:01,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:47:01,913 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 18:47:01,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash -103700359, now seen corresponding path program 6 times [2024-06-27 18:47:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:01,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670180255] [2024-06-27 18:47:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:01,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:05,084 INFO 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 18:47:05,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:05,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670180255] [2024-06-27 18:47:05,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670180255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:05,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:05,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:05,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687556961] [2024-06-27 18:47:05,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:05,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:05,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:05,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:05,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:05,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 1630 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 18:47:05,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:05,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:05,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:07,473 INFO L124 PetriNetUnfolderBase]: 5320/8158 cut-off events. [2024-06-27 18:47:07,473 INFO L125 PetriNetUnfolderBase]: For 142025/142030 co-relation queries the response was YES. [2024-06-27 18:47:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43254 conditions, 8158 events. 5320/8158 cut-off events. For 142025/142030 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 49013 event pairs, 990 based on Foata normal form. 16/8169 useless extension candidates. Maximal degree in co-relation 43194. Up to 6063 conditions per place. [2024-06-27 18:47:07,540 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 157 selfloop transitions, 72 changer transitions 0/236 dead transitions. [2024-06-27 18:47:07,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 236 transitions, 2426 flow [2024-06-27 18:47:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 18:47:07,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-06-27 18:47:07,542 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 1630 flow. Second operand 9 states and 244 transitions. [2024-06-27 18:47:07,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 236 transitions, 2426 flow [2024-06-27 18:47:07,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 236 transitions, 2275 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:07,736 INFO L231 Difference]: Finished difference. Result has 141 places, 151 transitions, 1669 flow [2024-06-27 18:47:07,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1669, PETRI_PLACES=141, PETRI_TRANSITIONS=151} [2024-06-27 18:47:07,736 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 18:47:07,736 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 151 transitions, 1669 flow [2024-06-27 18:47:07,736 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 18:47:07,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:07,737 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 18:47:07,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:47:07,737 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 18:47:07,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:07,737 INFO L85 PathProgramCache]: Analyzing trace with hash -261684508, now seen corresponding path program 1 times [2024-06-27 18:47:07,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:07,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557682983] [2024-06-27 18:47:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:12,366 INFO 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 18:47:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557682983] [2024-06-27 18:47:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557682983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:12,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:12,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164334385] [2024-06-27 18:47:12,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:12,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:12,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:12,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 151 transitions, 1669 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 18:47:12,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:12,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:12,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:14,724 INFO L124 PetriNetUnfolderBase]: 5370/8248 cut-off events. [2024-06-27 18:47:14,724 INFO L125 PetriNetUnfolderBase]: For 141098/141109 co-relation queries the response was YES. [2024-06-27 18:47:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43675 conditions, 8248 events. 5370/8248 cut-off events. For 141098/141109 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49990 event pairs, 1045 based on Foata normal form. 12/8255 useless extension candidates. Maximal degree in co-relation 43614. Up to 7472 conditions per place. [2024-06-27 18:47:14,784 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 184 selfloop transitions, 43 changer transitions 0/234 dead transitions. [2024-06-27 18:47:14,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 234 transitions, 2464 flow [2024-06-27 18:47:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:47:14,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:47:14,786 INFO L175 Difference]: Start difference. First operand has 141 places, 151 transitions, 1669 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:47:14,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 234 transitions, 2464 flow [2024-06-27 18:47:14,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 234 transitions, 2296 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:14,935 INFO L231 Difference]: Finished difference. Result has 144 places, 156 transitions, 1681 flow [2024-06-27 18:47:14,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1681, PETRI_PLACES=144, PETRI_TRANSITIONS=156} [2024-06-27 18:47:14,936 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:47:14,936 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 156 transitions, 1681 flow [2024-06-27 18:47:14,936 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 18:47:14,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:14,937 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 18:47:14,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:47:14,937 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:47:14,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1526496706, now seen corresponding path program 1 times [2024-06-27 18:47:14,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:14,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730009845] [2024-06-27 18:47:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:16,939 INFO 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 18:47:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730009845] [2024-06-27 18:47:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730009845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:16,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:47:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474945416] [2024-06-27 18:47:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:16,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:47:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:47:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:47:16,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:47:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 156 transitions, 1681 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:16,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:16,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:47:16,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:18,522 INFO L124 PetriNetUnfolderBase]: 4804/7655 cut-off events. [2024-06-27 18:47:18,522 INFO L125 PetriNetUnfolderBase]: For 133683/133710 co-relation queries the response was YES. [2024-06-27 18:47:18,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40168 conditions, 7655 events. 4804/7655 cut-off events. For 133683/133710 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 48928 event pairs, 1070 based on Foata normal form. 29/7570 useless extension candidates. Maximal degree in co-relation 40105. Up to 6714 conditions per place. [2024-06-27 18:47:18,578 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 140 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-27 18:47:18,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2149 flow [2024-06-27 18:47:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:47:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:47:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:47:18,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:47:18,580 INFO L175 Difference]: Start difference. First operand has 144 places, 156 transitions, 1681 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:47:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2149 flow [2024-06-27 18:47:18,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 195 transitions, 2032 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:18,730 INFO L231 Difference]: Finished difference. Result has 144 places, 160 transitions, 1671 flow [2024-06-27 18:47:18,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1671, PETRI_PLACES=144, PETRI_TRANSITIONS=160} [2024-06-27 18:47:18,731 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:47:18,731 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 160 transitions, 1671 flow [2024-06-27 18:47:18,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:18,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:18,731 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 18:47:18,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:47:18,731 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 18:47:18,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 471415067, now seen corresponding path program 7 times [2024-06-27 18:47:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:18,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876951652] [2024-06-27 18:47:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:18,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:21,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:21,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876951652] [2024-06-27 18:47:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876951652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:21,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:21,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971269954] [2024-06-27 18:47:21,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:21,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:21,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 160 transitions, 1671 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 18:47:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:21,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:21,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:24,367 INFO L124 PetriNetUnfolderBase]: 5688/8732 cut-off events. [2024-06-27 18:47:24,367 INFO L125 PetriNetUnfolderBase]: For 164841/164849 co-relation queries the response was YES. [2024-06-27 18:47:24,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47364 conditions, 8732 events. 5688/8732 cut-off events. For 164841/164849 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 53118 event pairs, 1045 based on Foata normal form. 21/8741 useless extension candidates. Maximal degree in co-relation 47300. Up to 7187 conditions per place. [2024-06-27 18:47:24,441 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 163 selfloop transitions, 70 changer transitions 0/240 dead transitions. [2024-06-27 18:47:24,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 2489 flow [2024-06-27 18:47:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 18:47:24,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2024-06-27 18:47:24,442 INFO L175 Difference]: Start difference. First operand has 144 places, 160 transitions, 1671 flow. Second operand 9 states and 237 transitions. [2024-06-27 18:47:24,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 2489 flow [2024-06-27 18:47:24,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 240 transitions, 2418 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 18:47:24,641 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1791 flow [2024-06-27 18:47:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1791, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-06-27 18:47:24,641 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 98 predicate places. [2024-06-27 18:47:24,641 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1791 flow [2024-06-27 18:47:24,642 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 18:47:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:24,642 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 18:47:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:47:24,642 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 18:47:24,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1693246953, now seen corresponding path program 8 times [2024-06-27 18:47:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082918351] [2024-06-27 18:47:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:27,787 INFO 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 18:47:27,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:27,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082918351] [2024-06-27 18:47:27,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082918351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:27,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:27,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:27,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113869999] [2024-06-27 18:47:27,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:27,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:27,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:27,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:27,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1791 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 18:47:27,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:27,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:27,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:30,321 INFO L124 PetriNetUnfolderBase]: 5914/9122 cut-off events. [2024-06-27 18:47:30,321 INFO L125 PetriNetUnfolderBase]: For 191864/191872 co-relation queries the response was YES. [2024-06-27 18:47:30,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50907 conditions, 9122 events. 5914/9122 cut-off events. For 191864/191872 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 56203 event pairs, 1092 based on Foata normal form. 21/9131 useless extension candidates. Maximal degree in co-relation 50842. Up to 7533 conditions per place. [2024-06-27 18:47:30,391 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 163 selfloop transitions, 71 changer transitions 0/241 dead transitions. [2024-06-27 18:47:30,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 241 transitions, 2613 flow [2024-06-27 18:47:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:47:30,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:47:30,393 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1791 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:47:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 241 transitions, 2613 flow [2024-06-27 18:47:30,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2454 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:30,600 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1827 flow [2024-06-27 18:47:30,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1827, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2024-06-27 18:47:30,601 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 100 predicate places. [2024-06-27 18:47:30,601 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1827 flow [2024-06-27 18:47:30,601 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 18:47:30,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:30,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:30,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:47:30,602 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 18:47:30,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1829560705, now seen corresponding path program 9 times [2024-06-27 18:47:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138729564] [2024-06-27 18:47:30,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:30,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:33,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:33,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138729564] [2024-06-27 18:47:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138729564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:33,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513996316] [2024-06-27 18:47:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:33,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:34,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1827 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 18:47:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:36,537 INFO L124 PetriNetUnfolderBase]: 6236/9594 cut-off events. [2024-06-27 18:47:36,537 INFO L125 PetriNetUnfolderBase]: For 218060/218068 co-relation queries the response was YES. [2024-06-27 18:47:36,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54852 conditions, 9594 events. 6236/9594 cut-off events. For 218060/218068 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 59289 event pairs, 1090 based on Foata normal form. 17/9599 useless extension candidates. Maximal degree in co-relation 54786. Up to 7107 conditions per place. [2024-06-27 18:47:36,618 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 166 selfloop transitions, 75 changer transitions 0/248 dead transitions. [2024-06-27 18:47:36,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 2865 flow [2024-06-27 18:47:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:47:36,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:47:36,620 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1827 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:47:36,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 2865 flow [2024-06-27 18:47:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 248 transitions, 2702 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 18:47:36,906 INFO L231 Difference]: Finished difference. Result has 153 places, 164 transitions, 1914 flow [2024-06-27 18:47:36,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1914, PETRI_PLACES=153, PETRI_TRANSITIONS=164} [2024-06-27 18:47:36,906 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 102 predicate places. [2024-06-27 18:47:36,907 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 164 transitions, 1914 flow [2024-06-27 18:47:36,907 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 18:47:36,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:36,907 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 18:47:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:47:36,907 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 18:47:36,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash 665354477, now seen corresponding path program 10 times [2024-06-27 18:47:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:36,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231351803] [2024-06-27 18:47:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:39,908 INFO 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 18:47:39,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:39,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231351803] [2024-06-27 18:47:39,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231351803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:39,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:39,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:39,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582634319] [2024-06-27 18:47:39,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:39,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:39,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:39,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:39,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:39,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 164 transitions, 1914 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 18:47:39,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:39,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:39,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:42,539 INFO L124 PetriNetUnfolderBase]: 6200/9532 cut-off events. [2024-06-27 18:47:42,540 INFO L125 PetriNetUnfolderBase]: For 204644/204652 co-relation queries the response was YES. [2024-06-27 18:47:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53389 conditions, 9532 events. 6200/9532 cut-off events. For 204644/204652 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 58926 event pairs, 1129 based on Foata normal form. 21/9541 useless extension candidates. Maximal degree in co-relation 53322. Up to 7979 conditions per place. [2024-06-27 18:47:42,626 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 161 selfloop transitions, 74 changer transitions 0/242 dead transitions. [2024-06-27 18:47:42,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 242 transitions, 2688 flow [2024-06-27 18:47:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:47:42,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:47:42,628 INFO L175 Difference]: Start difference. First operand has 153 places, 164 transitions, 1914 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:47:42,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 242 transitions, 2688 flow [2024-06-27 18:47:42,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 242 transitions, 2553 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:42,968 INFO L231 Difference]: Finished difference. Result has 157 places, 164 transitions, 1934 flow [2024-06-27 18:47:42,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1934, PETRI_PLACES=157, PETRI_TRANSITIONS=164} [2024-06-27 18:47:42,968 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 106 predicate places. [2024-06-27 18:47:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 164 transitions, 1934 flow [2024-06-27 18:47:42,968 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 18:47:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:42,968 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 18:47:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:47:42,969 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 18:47:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1687669092, now seen corresponding path program 2 times [2024-06-27 18:47:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761086890] [2024-06-27 18:47:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:46,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:46,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761086890] [2024-06-27 18:47:46,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761086890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:46,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:46,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87293938] [2024-06-27 18:47:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:46,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:46,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 164 transitions, 1934 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 18:47:46,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:46,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:46,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:49,314 INFO L124 PetriNetUnfolderBase]: 6250/9715 cut-off events. [2024-06-27 18:47:49,315 INFO L125 PetriNetUnfolderBase]: For 176802/176820 co-relation queries the response was YES. [2024-06-27 18:47:49,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53298 conditions, 9715 events. 6250/9715 cut-off events. For 176802/176820 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 61125 event pairs, 1308 based on Foata normal form. 16/9725 useless extension candidates. Maximal degree in co-relation 53229. Up to 8808 conditions per place. [2024-06-27 18:47:49,396 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 193 selfloop transitions, 45 changer transitions 0/245 dead transitions. [2024-06-27 18:47:49,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 245 transitions, 2780 flow [2024-06-27 18:47:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:47:49,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:47:49,399 INFO L175 Difference]: Start difference. First operand has 157 places, 164 transitions, 1934 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:47:49,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 245 transitions, 2780 flow [2024-06-27 18:47:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 245 transitions, 2615 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 18:47:49,691 INFO L231 Difference]: Finished difference. Result has 159 places, 169 transitions, 1962 flow [2024-06-27 18:47:49,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1962, PETRI_PLACES=159, PETRI_TRANSITIONS=169} [2024-06-27 18:47:49,692 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-27 18:47:49,692 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 169 transitions, 1962 flow [2024-06-27 18:47:49,692 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 18:47:49,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:49,692 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 18:47:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:47:49,692 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 18:47:49,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1089449102, now seen corresponding path program 3 times [2024-06-27 18:47:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508833951] [2024-06-27 18:47:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:52,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508833951] [2024-06-27 18:47:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508833951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:52,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630363024] [2024-06-27 18:47:52,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:52,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:52,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 169 transitions, 1962 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 18:47:52,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:52,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:52,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:55,335 INFO L124 PetriNetUnfolderBase]: 6331/9912 cut-off events. [2024-06-27 18:47:55,335 INFO L125 PetriNetUnfolderBase]: For 185320/185338 co-relation queries the response was YES. [2024-06-27 18:47:55,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54550 conditions, 9912 events. 6331/9912 cut-off events. For 185320/185338 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 63183 event pairs, 1362 based on Foata normal form. 16/9922 useless extension candidates. Maximal degree in co-relation 54479. Up to 8914 conditions per place. [2024-06-27 18:47:55,434 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 192 selfloop transitions, 54 changer transitions 0/253 dead transitions. [2024-06-27 18:47:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 253 transitions, 2886 flow [2024-06-27 18:47:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 18:47:55,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342789598108747 [2024-06-27 18:47:55,435 INFO L175 Difference]: Start difference. First operand has 159 places, 169 transitions, 1962 flow. Second operand 9 states and 226 transitions. [2024-06-27 18:47:55,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 253 transitions, 2886 flow [2024-06-27 18:47:55,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 253 transitions, 2739 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:55,731 INFO L231 Difference]: Finished difference. Result has 164 places, 179 transitions, 2133 flow [2024-06-27 18:47:55,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2133, PETRI_PLACES=164, PETRI_TRANSITIONS=179} [2024-06-27 18:47:55,732 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:47:55,732 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 179 transitions, 2133 flow [2024-06-27 18:47:55,732 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 18:47:55,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:55,733 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 18:47:55,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:47:55,733 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 18:47:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1082299262, now seen corresponding path program 4 times [2024-06-27 18:47:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134743954] [2024-06-27 18:47:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:58,884 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 18:47:58,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:58,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134743954] [2024-06-27 18:47:58,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134743954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:58,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:58,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:58,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825395949] [2024-06-27 18:47:58,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:58,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:58,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:58,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:47:58,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 179 transitions, 2133 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 18:47:58,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:58,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:47:58,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:01,447 INFO L124 PetriNetUnfolderBase]: 6381/9966 cut-off events. [2024-06-27 18:48:01,447 INFO L125 PetriNetUnfolderBase]: For 195693/195711 co-relation queries the response was YES. [2024-06-27 18:48:01,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56129 conditions, 9966 events. 6381/9966 cut-off events. For 195693/195711 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 63297 event pairs, 1374 based on Foata normal form. 16/9976 useless extension candidates. Maximal degree in co-relation 56055. Up to 8988 conditions per place. [2024-06-27 18:48:01,546 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 196 selfloop transitions, 53 changer transitions 0/256 dead transitions. [2024-06-27 18:48:01,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 256 transitions, 2979 flow [2024-06-27 18:48:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:48:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:48:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:48:01,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366430260047281 [2024-06-27 18:48:01,547 INFO L175 Difference]: Start difference. First operand has 164 places, 179 transitions, 2133 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:48:01,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 256 transitions, 2979 flow [2024-06-27 18:48:01,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 256 transitions, 2860 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:01,884 INFO L231 Difference]: Finished difference. Result has 170 places, 182 transitions, 2219 flow [2024-06-27 18:48:01,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=170, PETRI_TRANSITIONS=182} [2024-06-27 18:48:01,885 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 119 predicate places. [2024-06-27 18:48:01,885 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 182 transitions, 2219 flow [2024-06-27 18:48:01,885 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 18:48:01,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:01,885 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 18:48:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:48:01,885 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 18:48:01,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:01,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1348322972, now seen corresponding path program 5 times [2024-06-27 18:48:01,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:01,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579047267] [2024-06-27 18:48:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:05,396 INFO 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 18:48:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:05,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579047267] [2024-06-27 18:48:05,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579047267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:05,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:05,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:48:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214734586] [2024-06-27 18:48:05,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:05,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:48:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:48:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:48:05,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:05,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 182 transitions, 2219 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 18:48:05,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:05,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:07,964 INFO L124 PetriNetUnfolderBase]: 6373/9930 cut-off events. [2024-06-27 18:48:07,964 INFO L125 PetriNetUnfolderBase]: For 193698/193716 co-relation queries the response was YES. [2024-06-27 18:48:08,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54619 conditions, 9930 events. 6373/9930 cut-off events. For 193698/193716 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 62771 event pairs, 1190 based on Foata normal form. 16/9940 useless extension candidates. Maximal degree in co-relation 54543. Up to 8734 conditions per place. [2024-06-27 18:48:08,057 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 189 selfloop transitions, 65 changer transitions 0/261 dead transitions. [2024-06-27 18:48:08,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 261 transitions, 3139 flow [2024-06-27 18:48:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:48:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:48:08,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 18:48:08,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366430260047281 [2024-06-27 18:48:08,060 INFO L175 Difference]: Start difference. First operand has 170 places, 182 transitions, 2219 flow. Second operand 9 states and 227 transitions. [2024-06-27 18:48:08,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 261 transitions, 3139 flow [2024-06-27 18:48:08,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 2980 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 18:48:08,399 INFO L231 Difference]: Finished difference. Result has 174 places, 186 transitions, 2360 flow [2024-06-27 18:48:08,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2360, PETRI_PLACES=174, PETRI_TRANSITIONS=186} [2024-06-27 18:48:08,399 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 123 predicate places. [2024-06-27 18:48:08,399 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 186 transitions, 2360 flow [2024-06-27 18:48:08,399 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 18:48:08,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:08,400 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 18:48:08,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:48:08,400 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:08,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1514116546, now seen corresponding path program 2 times [2024-06-27 18:48:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:08,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162551209] [2024-06-27 18:48:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:08,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:10,276 INFO 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 18:48:10,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162551209] [2024-06-27 18:48:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162551209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:10,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:10,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:10,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874795743] [2024-06-27 18:48:10,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:10,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:10,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:10,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:48:10,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 186 transitions, 2360 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:10,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:10,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:48:10,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:12,201 INFO L124 PetriNetUnfolderBase]: 5690/9143 cut-off events. [2024-06-27 18:48:12,202 INFO L125 PetriNetUnfolderBase]: For 190883/190918 co-relation queries the response was YES. [2024-06-27 18:48:12,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50322 conditions, 9143 events. 5690/9143 cut-off events. For 190883/190918 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 60595 event pairs, 1283 based on Foata normal form. 30/9030 useless extension candidates. Maximal degree in co-relation 50244. Up to 7960 conditions per place. [2024-06-27 18:48:12,295 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 154 selfloop transitions, 32 changer transitions 0/223 dead transitions. [2024-06-27 18:48:12,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 223 transitions, 2912 flow [2024-06-27 18:48:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:48:12,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:48:12,296 INFO L175 Difference]: Start difference. First operand has 174 places, 186 transitions, 2360 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:48:12,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 223 transitions, 2912 flow [2024-06-27 18:48:12,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 223 transitions, 2751 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:12,640 INFO L231 Difference]: Finished difference. Result has 176 places, 193 transitions, 2377 flow [2024-06-27 18:48:12,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2377, PETRI_PLACES=176, PETRI_TRANSITIONS=193} [2024-06-27 18:48:12,640 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 18:48:12,640 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 193 transitions, 2377 flow [2024-06-27 18:48:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:12,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:12,640 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 18:48:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:48:12,641 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:12,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1520776834, now seen corresponding path program 1 times [2024-06-27 18:48:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:12,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146686617] [2024-06-27 18:48:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:12,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:14,197 INFO 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 18:48:14,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:14,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146686617] [2024-06-27 18:48:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146686617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:14,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746673876] [2024-06-27 18:48:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:14,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:14,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:14,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 193 transitions, 2377 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:48:14,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:14,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:14,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:16,493 INFO L124 PetriNetUnfolderBase]: 6417/10229 cut-off events. [2024-06-27 18:48:16,493 INFO L125 PetriNetUnfolderBase]: For 197827/197829 co-relation queries the response was YES. [2024-06-27 18:48:16,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56588 conditions, 10229 events. 6417/10229 cut-off events. For 197827/197829 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 66662 event pairs, 1697 based on Foata normal form. 2/10229 useless extension candidates. Maximal degree in co-relation 56507. Up to 9322 conditions per place. [2024-06-27 18:48:16,579 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 204 selfloop transitions, 21 changer transitions 0/232 dead transitions. [2024-06-27 18:48:16,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 232 transitions, 3107 flow [2024-06-27 18:48:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:48:16,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:48:16,581 INFO L175 Difference]: Start difference. First operand has 176 places, 193 transitions, 2377 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:48:16,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 232 transitions, 3107 flow [2024-06-27 18:48:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 232 transitions, 3043 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 18:48:16,881 INFO L231 Difference]: Finished difference. Result has 180 places, 201 transitions, 2486 flow [2024-06-27 18:48:16,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2486, PETRI_PLACES=180, PETRI_TRANSITIONS=201} [2024-06-27 18:48:16,882 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 129 predicate places. [2024-06-27 18:48:16,882 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 201 transitions, 2486 flow [2024-06-27 18:48:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:48:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:16,882 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 18:48:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:48:16,883 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 18:48:16,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -368291074, now seen corresponding path program 2 times [2024-06-27 18:48:16,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:16,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884242426] [2024-06-27 18:48:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:18,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:18,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884242426] [2024-06-27 18:48:18,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884242426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:18,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:18,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:18,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062317533] [2024-06-27 18:48:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:18,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:18,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:18,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:18,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 201 transitions, 2486 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:48:18,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:18,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:18,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:20,509 INFO L124 PetriNetUnfolderBase]: 6411/10222 cut-off events. [2024-06-27 18:48:20,509 INFO L125 PetriNetUnfolderBase]: For 203970/203981 co-relation queries the response was YES. [2024-06-27 18:48:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57376 conditions, 10222 events. 6411/10222 cut-off events. For 203970/203981 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 66639 event pairs, 1695 based on Foata normal form. 8/10227 useless extension candidates. Maximal degree in co-relation 57293. Up to 9317 conditions per place. [2024-06-27 18:48:20,610 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 198 selfloop transitions, 21 changer transitions 0/226 dead transitions. [2024-06-27 18:48:20,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 226 transitions, 2988 flow [2024-06-27 18:48:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:48:20,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929078014184397 [2024-06-27 18:48:20,612 INFO L175 Difference]: Start difference. First operand has 180 places, 201 transitions, 2486 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:48:20,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 226 transitions, 2988 flow [2024-06-27 18:48:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 226 transitions, 2890 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-27 18:48:21,054 INFO L231 Difference]: Finished difference. Result has 184 places, 201 transitions, 2437 flow [2024-06-27 18:48:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2437, PETRI_PLACES=184, PETRI_TRANSITIONS=201} [2024-06-27 18:48:21,054 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 133 predicate places. [2024-06-27 18:48:21,054 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 201 transitions, 2437 flow [2024-06-27 18:48:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 18:48:21,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:21,055 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 18:48:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:48:21,055 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 18:48:21,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1514101666, now seen corresponding path program 1 times [2024-06-27 18:48:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583766022] [2024-06-27 18:48:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583766022] [2024-06-27 18:48:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583766022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:48:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993632424] [2024-06-27 18:48:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:48:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:48:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:48:23,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:48:23,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 201 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 18:48:23,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:23,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:48:23,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:25,422 INFO L124 PetriNetUnfolderBase]: 5740/9411 cut-off events. [2024-06-27 18:48:25,422 INFO L125 PetriNetUnfolderBase]: For 201238/201290 co-relation queries the response was YES. [2024-06-27 18:48:25,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52531 conditions, 9411 events. 5740/9411 cut-off events. For 201238/201290 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 63895 event pairs, 1587 based on Foata normal form. 38/9334 useless extension candidates. Maximal degree in co-relation 52446. Up to 8164 conditions per place. [2024-06-27 18:48:25,529 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 177 selfloop transitions, 13 changer transitions 0/229 dead transitions. [2024-06-27 18:48:25,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 229 transitions, 2933 flow [2024-06-27 18:48:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:48:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:48:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:48:25,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 18:48:25,530 INFO L175 Difference]: Start difference. First operand has 184 places, 201 transitions, 2437 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:48:25,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 229 transitions, 2933 flow [2024-06-27 18:48:25,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 229 transitions, 2874 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:25,865 INFO L231 Difference]: Finished difference. Result has 185 places, 204 transitions, 2468 flow [2024-06-27 18:48:25,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2468, PETRI_PLACES=185, PETRI_TRANSITIONS=204} [2024-06-27 18:48:25,866 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 134 predicate places. [2024-06-27 18:48:25,866 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 204 transitions, 2468 flow [2024-06-27 18:48:25,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 18:48:25,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:25,866 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 18:48:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:48:25,867 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:25,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 477715945, now seen corresponding path program 1 times [2024-06-27 18:48:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:25,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737438190] [2024-06-27 18:48:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:25,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737438190] [2024-06-27 18:48:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737438190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:30,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:30,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:48:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082802974] [2024-06-27 18:48:30,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:30,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:48:30,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:48:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:48:30,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:30,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 204 transitions, 2468 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:30,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:30,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:30,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:32,986 INFO L124 PetriNetUnfolderBase]: 6910/10738 cut-off events. [2024-06-27 18:48:32,986 INFO L125 PetriNetUnfolderBase]: For 248134/248139 co-relation queries the response was YES. [2024-06-27 18:48:33,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62559 conditions, 10738 events. 6910/10738 cut-off events. For 248134/248139 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 68543 event pairs, 1247 based on Foata normal form. 12/10745 useless extension candidates. Maximal degree in co-relation 62473. Up to 8432 conditions per place. [2024-06-27 18:48:33,089 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 209 selfloop transitions, 90 changer transitions 0/306 dead transitions. [2024-06-27 18:48:33,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 306 transitions, 3618 flow [2024-06-27 18:48:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 18:48:33,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:48:33,091 INFO L175 Difference]: Start difference. First operand has 185 places, 204 transitions, 2468 flow. Second operand 10 states and 265 transitions. [2024-06-27 18:48:33,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 306 transitions, 3618 flow [2024-06-27 18:48:33,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 306 transitions, 3550 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:33,510 INFO L231 Difference]: Finished difference. Result has 193 places, 215 transitions, 2809 flow [2024-06-27 18:48:33,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2809, PETRI_PLACES=193, PETRI_TRANSITIONS=215} [2024-06-27 18:48:33,510 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-27 18:48:33,510 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 215 transitions, 2809 flow [2024-06-27 18:48:33,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:33,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:33,511 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 18:48:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:48:33,511 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:33,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1210919503, now seen corresponding path program 2 times [2024-06-27 18:48:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:33,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787100844] [2024-06-27 18:48:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:33,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:37,429 INFO 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 18:48:37,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787100844] [2024-06-27 18:48:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787100844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:37,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:37,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:48:37,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352893602] [2024-06-27 18:48:37,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:37,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:48:37,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:37,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:48:37,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:48:37,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:37,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 215 transitions, 2809 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:37,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:37,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:37,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:40,549 INFO L124 PetriNetUnfolderBase]: 7288/11482 cut-off events. [2024-06-27 18:48:40,549 INFO L125 PetriNetUnfolderBase]: For 284614/284622 co-relation queries the response was YES. [2024-06-27 18:48:40,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68935 conditions, 11482 events. 7288/11482 cut-off events. For 284614/284622 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 75231 event pairs, 1390 based on Foata normal form. 13/11483 useless extension candidates. Maximal degree in co-relation 68846. Up to 9258 conditions per place. [2024-06-27 18:48:40,661 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 214 selfloop transitions, 91 changer transitions 0/312 dead transitions. [2024-06-27 18:48:40,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 312 transitions, 3951 flow [2024-06-27 18:48:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-27 18:48:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2024-06-27 18:48:40,664 INFO L175 Difference]: Start difference. First operand has 193 places, 215 transitions, 2809 flow. Second operand 10 states and 262 transitions. [2024-06-27 18:48:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 312 transitions, 3951 flow [2024-06-27 18:48:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 312 transitions, 3765 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:41,218 INFO L231 Difference]: Finished difference. Result has 200 places, 223 transitions, 2993 flow [2024-06-27 18:48:41,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2993, PETRI_PLACES=200, PETRI_TRANSITIONS=223} [2024-06-27 18:48:41,219 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 149 predicate places. [2024-06-27 18:48:41,219 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 223 transitions, 2993 flow [2024-06-27 18:48:41,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:41,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:41,219 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 18:48:41,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:48:41,219 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:41,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash -808460145, now seen corresponding path program 3 times [2024-06-27 18:48:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:41,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020521859] [2024-06-27 18:48:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:44,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:44,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020521859] [2024-06-27 18:48:44,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020521859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:44,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:44,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:48:44,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919035396] [2024-06-27 18:48:44,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:48:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:48:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:48:44,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:44,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 223 transitions, 2993 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:44,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:44,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:44,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:48,049 INFO L124 PetriNetUnfolderBase]: 7621/11999 cut-off events. [2024-06-27 18:48:48,049 INFO L125 PetriNetUnfolderBase]: For 304500/304508 co-relation queries the response was YES. [2024-06-27 18:48:48,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73064 conditions, 11999 events. 7621/11999 cut-off events. For 304500/304508 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 79292 event pairs, 1452 based on Foata normal form. 13/12000 useless extension candidates. Maximal degree in co-relation 72972. Up to 9992 conditions per place. [2024-06-27 18:48:48,172 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 213 selfloop transitions, 97 changer transitions 0/317 dead transitions. [2024-06-27 18:48:48,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 4108 flow [2024-06-27 18:48:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:48:48,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-06-27 18:48:48,174 INFO L175 Difference]: Start difference. First operand has 200 places, 223 transitions, 2993 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:48:48,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 4108 flow [2024-06-27 18:48:48,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 317 transitions, 3908 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:48,906 INFO L231 Difference]: Finished difference. Result has 207 places, 229 transitions, 3142 flow [2024-06-27 18:48:48,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3142, PETRI_PLACES=207, PETRI_TRANSITIONS=229} [2024-06-27 18:48:48,906 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-27 18:48:48,906 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 229 transitions, 3142 flow [2024-06-27 18:48:48,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:48,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:48,907 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 18:48:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:48:48,907 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:48,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:48,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1446878927, now seen corresponding path program 4 times [2024-06-27 18:48:48,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:48,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963785261] [2024-06-27 18:48:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:48,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:53,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963785261] [2024-06-27 18:48:53,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963785261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:53,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:48:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230469442] [2024-06-27 18:48:53,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:48:53,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:48:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:48:53,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:48:53,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 229 transitions, 3142 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:53,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:53,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:48:53,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:56,662 INFO L124 PetriNetUnfolderBase]: 7873/12438 cut-off events. [2024-06-27 18:48:56,662 INFO L125 PetriNetUnfolderBase]: For 324066/324077 co-relation queries the response was YES. [2024-06-27 18:48:56,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76390 conditions, 12438 events. 7873/12438 cut-off events. For 324066/324077 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 82953 event pairs, 1536 based on Foata normal form. 15/12443 useless extension candidates. Maximal degree in co-relation 76295. Up to 10388 conditions per place. [2024-06-27 18:48:56,993 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 211 selfloop transitions, 106 changer transitions 0/324 dead transitions. [2024-06-27 18:48:56,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 324 transitions, 4296 flow [2024-06-27 18:48:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:48:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:48:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-27 18:48:56,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299806576402321 [2024-06-27 18:48:56,995 INFO L175 Difference]: Start difference. First operand has 207 places, 229 transitions, 3142 flow. Second operand 11 states and 274 transitions. [2024-06-27 18:48:56,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 324 transitions, 4296 flow [2024-06-27 18:48:57,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 324 transitions, 4079 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 18:48:57,634 INFO L231 Difference]: Finished difference. Result has 215 places, 235 transitions, 3290 flow [2024-06-27 18:48:57,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3290, PETRI_PLACES=215, PETRI_TRANSITIONS=235} [2024-06-27 18:48:57,634 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 164 predicate places. [2024-06-27 18:48:57,635 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 235 transitions, 3290 flow [2024-06-27 18:48:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:48:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:48:57,635 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:57,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1151659727, now seen corresponding path program 5 times [2024-06-27 18:48:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:57,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050047635] [2024-06-27 18:48:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:01,162 INFO 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 18:49:01,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:01,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050047635] [2024-06-27 18:49:01,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050047635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:01,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:01,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:49:01,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250816690] [2024-06-27 18:49:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:49:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:49:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:49:01,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:01,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 235 transitions, 3290 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:49:01,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:01,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:01,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:04,726 INFO L124 PetriNetUnfolderBase]: 7853/12371 cut-off events. [2024-06-27 18:49:04,726 INFO L125 PetriNetUnfolderBase]: For 304033/304043 co-relation queries the response was YES. [2024-06-27 18:49:04,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75090 conditions, 12371 events. 7853/12371 cut-off events. For 304033/304043 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 81840 event pairs, 1362 based on Foata normal form. 14/12373 useless extension candidates. Maximal degree in co-relation 74992. Up to 8026 conditions per place. [2024-06-27 18:49:04,874 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 195 selfloop transitions, 120 changer transitions 0/322 dead transitions. [2024-06-27 18:49:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 322 transitions, 4200 flow [2024-06-27 18:49:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:49:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:49:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:49:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551063829787234 [2024-06-27 18:49:04,875 INFO L175 Difference]: Start difference. First operand has 215 places, 235 transitions, 3290 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:49:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 322 transitions, 4200 flow [2024-06-27 18:49:05,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 322 transitions, 4013 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:05,691 INFO L231 Difference]: Finished difference. Result has 220 places, 234 transitions, 3259 flow [2024-06-27 18:49:05,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3259, PETRI_PLACES=220, PETRI_TRANSITIONS=234} [2024-06-27 18:49:05,691 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 169 predicate places. [2024-06-27 18:49:05,691 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 234 transitions, 3259 flow [2024-06-27 18:49:05,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 18:49:05,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:05,691 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 18:49:05,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:49:05,692 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 18:49:05,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1936854959, now seen corresponding path program 1 times [2024-06-27 18:49:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050873089] [2024-06-27 18:49:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:07,583 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 18:49:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:07,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050873089] [2024-06-27 18:49:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050873089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:07,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:07,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:07,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014470255] [2024-06-27 18:49:07,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:07,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:07,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:07,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:07,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 234 transitions, 3259 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 18:49:07,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:07,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:07,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:10,458 INFO L124 PetriNetUnfolderBase]: 7889/12807 cut-off events. [2024-06-27 18:49:10,458 INFO L125 PetriNetUnfolderBase]: For 290864/290868 co-relation queries the response was YES. [2024-06-27 18:49:10,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75660 conditions, 12807 events. 7889/12807 cut-off events. For 290864/290868 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 88597 event pairs, 2331 based on Foata normal form. 3/12808 useless extension candidates. Maximal degree in co-relation 75560. Up to 11537 conditions per place. [2024-06-27 18:49:10,608 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 243 selfloop transitions, 32 changer transitions 0/282 dead transitions. [2024-06-27 18:49:10,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 282 transitions, 4135 flow [2024-06-27 18:49:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 18:49:10,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 18:49:10,610 INFO L175 Difference]: Start difference. First operand has 220 places, 234 transitions, 3259 flow. Second operand 7 states and 170 transitions. [2024-06-27 18:49:10,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 282 transitions, 4135 flow [2024-06-27 18:49:11,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 3714 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-27 18:49:11,368 INFO L231 Difference]: Finished difference. Result has 216 places, 242 transitions, 3041 flow [2024-06-27 18:49:11,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3041, PETRI_PLACES=216, PETRI_TRANSITIONS=242} [2024-06-27 18:49:11,369 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-06-27 18:49:11,369 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 242 transitions, 3041 flow [2024-06-27 18:49:11,369 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 18:49:11,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:11,369 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 18:49:11,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:49:11,370 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 18:49:11,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1937004689, now seen corresponding path program 2 times [2024-06-27 18:49:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:11,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728629611] [2024-06-27 18:49:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:11,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:49:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728629611] [2024-06-27 18:49:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728629611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:13,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541869858] [2024-06-27 18:49:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:13,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:13,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:13,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 242 transitions, 3041 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 18:49:13,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:13,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:16,440 INFO L124 PetriNetUnfolderBase]: 7925/12855 cut-off events. [2024-06-27 18:49:16,440 INFO L125 PetriNetUnfolderBase]: For 273132/273136 co-relation queries the response was YES. [2024-06-27 18:49:16,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72698 conditions, 12855 events. 7925/12855 cut-off events. For 273132/273136 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 88818 event pairs, 2331 based on Foata normal form. 3/12856 useless extension candidates. Maximal degree in co-relation 72600. Up to 11569 conditions per place. [2024-06-27 18:49:16,576 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 240 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-27 18:49:16,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 282 transitions, 3853 flow [2024-06-27 18:49:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:49:16,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:49:16,578 INFO L175 Difference]: Start difference. First operand has 216 places, 242 transitions, 3041 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:49:16,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 282 transitions, 3853 flow [2024-06-27 18:49:17,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 282 transitions, 3715 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:17,200 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 3050 flow [2024-06-27 18:49:17,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3050, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-27 18:49:17,200 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 168 predicate places. [2024-06-27 18:49:17,201 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 3050 flow [2024-06-27 18:49:17,201 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 18:49:17,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:17,201 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 18:49:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:49:17,201 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 18:49:17,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1467880121, now seen corresponding path program 3 times [2024-06-27 18:49:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391430494] [2024-06-27 18:49:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:19,074 INFO 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 18:49:19,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:19,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391430494] [2024-06-27 18:49:19,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391430494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:19,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:19,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:19,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72785391] [2024-06-27 18:49:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:19,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:19,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 3050 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 18:49:19,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:19,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:19,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:21,942 INFO L124 PetriNetUnfolderBase]: 7919/12857 cut-off events. [2024-06-27 18:49:21,943 INFO L125 PetriNetUnfolderBase]: For 274908/274915 co-relation queries the response was YES. [2024-06-27 18:49:22,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72227 conditions, 12857 events. 7919/12857 cut-off events. For 274908/274915 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 88880 event pairs, 2343 based on Foata normal form. 5/12858 useless extension candidates. Maximal degree in co-relation 72128. Up to 11564 conditions per place. [2024-06-27 18:49:22,099 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 234 selfloop transitions, 35 changer transitions 0/276 dead transitions. [2024-06-27 18:49:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3662 flow [2024-06-27 18:49:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 18:49:22,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:49:22,101 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 3050 flow. Second operand 7 states and 161 transitions. [2024-06-27 18:49:22,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3662 flow [2024-06-27 18:49:22,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 276 transitions, 3553 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 18:49:22,850 INFO L231 Difference]: Finished difference. Result has 222 places, 246 transitions, 3018 flow [2024-06-27 18:49:22,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3018, PETRI_PLACES=222, PETRI_TRANSITIONS=246} [2024-06-27 18:49:22,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 171 predicate places. [2024-06-27 18:49:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 246 transitions, 3018 flow [2024-06-27 18:49:22,851 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 18:49:22,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:22,851 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 18:49:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:49:22,851 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 18:49:22,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1908861437, now seen corresponding path program 1 times [2024-06-27 18:49:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107940478] [2024-06-27 18:49:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:22,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:25,197 INFO 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 18:49:25,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:25,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107940478] [2024-06-27 18:49:25,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107940478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:25,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:25,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:25,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142346365] [2024-06-27 18:49:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:25,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:25,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:25,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:25,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 246 transitions, 3018 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 18:49:25,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:25,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:25,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:27,815 INFO L124 PetriNetUnfolderBase]: 8069/12859 cut-off events. [2024-06-27 18:49:27,815 INFO L125 PetriNetUnfolderBase]: For 287347/287364 co-relation queries the response was YES. [2024-06-27 18:49:27,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73578 conditions, 12859 events. 8069/12859 cut-off events. For 287347/287364 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 86777 event pairs, 1976 based on Foata normal form. 16/12872 useless extension candidates. Maximal degree in co-relation 73478. Up to 11693 conditions per place. [2024-06-27 18:49:27,977 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 279 selfloop transitions, 39 changer transitions 0/325 dead transitions. [2024-06-27 18:49:27,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 325 transitions, 4289 flow [2024-06-27 18:49:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 18:49:27,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200945626477541 [2024-06-27 18:49:27,979 INFO L175 Difference]: Start difference. First operand has 222 places, 246 transitions, 3018 flow. Second operand 9 states and 220 transitions. [2024-06-27 18:49:27,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 325 transitions, 4289 flow [2024-06-27 18:49:28,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 325 transitions, 4185 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 18:49:28,707 INFO L231 Difference]: Finished difference. Result has 226 places, 261 transitions, 3248 flow [2024-06-27 18:49:28,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3248, PETRI_PLACES=226, PETRI_TRANSITIONS=261} [2024-06-27 18:49:28,707 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 175 predicate places. [2024-06-27 18:49:28,707 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 261 transitions, 3248 flow [2024-06-27 18:49:28,707 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 18:49:28,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:28,708 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 18:49:28,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:49:28,708 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 18:49:28,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 528462239, now seen corresponding path program 2 times [2024-06-27 18:49:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858285988] [2024-06-27 18:49:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:31,237 INFO 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 18:49:31,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858285988] [2024-06-27 18:49:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858285988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:31,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:31,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:31,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364222345] [2024-06-27 18:49:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:31,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:31,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:31,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:31,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:31,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 261 transitions, 3248 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 18:49:31,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:31,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:31,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:33,963 INFO L124 PetriNetUnfolderBase]: 8063/12853 cut-off events. [2024-06-27 18:49:33,963 INFO L125 PetriNetUnfolderBase]: For 304369/304386 co-relation queries the response was YES. [2024-06-27 18:49:34,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75371 conditions, 12853 events. 8063/12853 cut-off events. For 304369/304386 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 86742 event pairs, 1978 based on Foata normal form. 16/12866 useless extension candidates. Maximal degree in co-relation 75268. Up to 11688 conditions per place. [2024-06-27 18:49:34,096 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 262 selfloop transitions, 37 changer transitions 0/306 dead transitions. [2024-06-27 18:49:34,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 306 transitions, 4103 flow [2024-06-27 18:49:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:49:34,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 18:49:34,098 INFO L175 Difference]: Start difference. First operand has 226 places, 261 transitions, 3248 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:49:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 306 transitions, 4103 flow [2024-06-27 18:49:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 306 transitions, 3915 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:34,930 INFO L231 Difference]: Finished difference. Result has 228 places, 261 transitions, 3141 flow [2024-06-27 18:49:34,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3141, PETRI_PLACES=228, PETRI_TRANSITIONS=261} [2024-06-27 18:49:34,931 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 177 predicate places. [2024-06-27 18:49:34,931 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 261 transitions, 3141 flow [2024-06-27 18:49:34,931 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 18:49:34,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:34,932 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 18:49:34,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:49:34,932 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 18:49:34,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash 528471167, now seen corresponding path program 1 times [2024-06-27 18:49:34,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463988495] [2024-06-27 18:49:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:38,120 INFO 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 18:49:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:38,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463988495] [2024-06-27 18:49:38,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463988495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:38,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:38,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722680078] [2024-06-27 18:49:38,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:38,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:38,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:49:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 261 transitions, 3141 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:49:38,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:38,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:49:38,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:40,715 INFO L124 PetriNetUnfolderBase]: 7483/12078 cut-off events. [2024-06-27 18:49:40,715 INFO L125 PetriNetUnfolderBase]: For 317675/317796 co-relation queries the response was YES. [2024-06-27 18:49:40,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70867 conditions, 12078 events. 7483/12078 cut-off events. For 317675/317796 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 83617 event pairs, 1557 based on Foata normal form. 54/11923 useless extension candidates. Maximal degree in co-relation 70763. Up to 10361 conditions per place. [2024-06-27 18:49:40,851 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 232 selfloop transitions, 31 changer transitions 0/308 dead transitions. [2024-06-27 18:49:40,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 308 transitions, 3867 flow [2024-06-27 18:49:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:49:40,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:49:40,852 INFO L175 Difference]: Start difference. First operand has 228 places, 261 transitions, 3141 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:49:40,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 308 transitions, 3867 flow [2024-06-27 18:49:41,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 308 transitions, 3793 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 18:49:41,511 INFO L231 Difference]: Finished difference. Result has 229 places, 263 transitions, 3180 flow [2024-06-27 18:49:41,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3180, PETRI_PLACES=229, PETRI_TRANSITIONS=263} [2024-06-27 18:49:41,512 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 178 predicate places. [2024-06-27 18:49:41,512 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 263 transitions, 3180 flow [2024-06-27 18:49:41,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:49:41,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:41,512 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 18:49:41,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:49:41,512 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 18:49:41,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:41,513 INFO L85 PathProgramCache]: Analyzing trace with hash -94783323, now seen corresponding path program 3 times [2024-06-27 18:49:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:41,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724933455] [2024-06-27 18:49:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:43,776 INFO 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 18:49:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724933455] [2024-06-27 18:49:43,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724933455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:43,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:43,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864409847] [2024-06-27 18:49:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:43,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:43,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:43,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:43,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 263 transitions, 3180 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 18:49:43,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:43,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:43,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:46,690 INFO L124 PetriNetUnfolderBase]: 8269/13244 cut-off events. [2024-06-27 18:49:46,691 INFO L125 PetriNetUnfolderBase]: For 316170/316188 co-relation queries the response was YES. [2024-06-27 18:49:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76808 conditions, 13244 events. 8269/13244 cut-off events. For 316170/316188 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 90166 event pairs, 2142 based on Foata normal form. 14/13252 useless extension candidates. Maximal degree in co-relation 76703. Up to 12091 conditions per place. [2024-06-27 18:49:46,810 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 275 selfloop transitions, 28 changer transitions 0/310 dead transitions. [2024-06-27 18:49:46,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 4008 flow [2024-06-27 18:49:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 18:49:46,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 18:49:46,812 INFO L175 Difference]: Start difference. First operand has 229 places, 263 transitions, 3180 flow. Second operand 7 states and 169 transitions. [2024-06-27 18:49:46,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 4008 flow [2024-06-27 18:49:47,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 3887 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:47,493 INFO L231 Difference]: Finished difference. Result has 231 places, 264 transitions, 3139 flow [2024-06-27 18:49:47,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3069, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3139, PETRI_PLACES=231, PETRI_TRANSITIONS=264} [2024-06-27 18:49:47,493 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 180 predicate places. [2024-06-27 18:49:47,494 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 264 transitions, 3139 flow [2024-06-27 18:49:47,494 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 18:49:47,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:47,494 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 18:49:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:49:47,494 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 18:49:47,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1177615875, now seen corresponding path program 4 times [2024-06-27 18:49:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355202550] [2024-06-27 18:49:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:49,648 INFO 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 18:49:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:49,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355202550] [2024-06-27 18:49:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355202550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:49,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:49,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008116122] [2024-06-27 18:49:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:49,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:49,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:49,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 264 transitions, 3139 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 18:49:49,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:49,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:52,701 INFO L124 PetriNetUnfolderBase]: 8335/13350 cut-off events. [2024-06-27 18:49:52,702 INFO L125 PetriNetUnfolderBase]: For 321286/321304 co-relation queries the response was YES. [2024-06-27 18:49:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76927 conditions, 13350 events. 8335/13350 cut-off events. For 321286/321304 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 90908 event pairs, 2115 based on Foata normal form. 14/13358 useless extension candidates. Maximal degree in co-relation 76821. Up to 11830 conditions per place. [2024-06-27 18:49:52,859 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 267 selfloop transitions, 52 changer transitions 0/326 dead transitions. [2024-06-27 18:49:52,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 326 transitions, 4344 flow [2024-06-27 18:49:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 18:49:52,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 18:49:52,861 INFO L175 Difference]: Start difference. First operand has 231 places, 264 transitions, 3139 flow. Second operand 7 states and 172 transitions. [2024-06-27 18:49:52,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 326 transitions, 4344 flow [2024-06-27 18:49:53,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 326 transitions, 4287 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:49:53,637 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3467 flow [2024-06-27 18:49:53,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3467, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-27 18:49:53,638 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 184 predicate places. [2024-06-27 18:49:53,638 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3467 flow [2024-06-27 18:49:53,638 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 18:49:53,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:53,638 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 18:49:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:49:53,638 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 18:49:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1740362883, now seen corresponding path program 5 times [2024-06-27 18:49:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471046625] [2024-06-27 18:49:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:55,792 INFO 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 18:49:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471046625] [2024-06-27 18:49:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471046625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:55,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:49:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462510075] [2024-06-27 18:49:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:49:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:49:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:49:55,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:49:55,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3467 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 18:49:55,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:55,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:49:55,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:58,836 INFO L124 PetriNetUnfolderBase]: 8381/13329 cut-off events. [2024-06-27 18:49:58,837 INFO L125 PetriNetUnfolderBase]: For 335947/336003 co-relation queries the response was YES. [2024-06-27 18:49:58,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78850 conditions, 13329 events. 8381/13329 cut-off events. For 335947/336003 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 90096 event pairs, 2010 based on Foata normal form. 26/13346 useless extension candidates. Maximal degree in co-relation 78741. Up to 11870 conditions per place. [2024-06-27 18:49:58,991 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 263 selfloop transitions, 55 changer transitions 0/325 dead transitions. [2024-06-27 18:49:58,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 325 transitions, 4518 flow [2024-06-27 18:49:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:49:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:49:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 18:49:58,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 18:49:58,992 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3467 flow. Second operand 7 states and 167 transitions. [2024-06-27 18:49:58,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 325 transitions, 4518 flow [2024-06-27 18:49:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 325 transitions, 4410 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-27 18:49:59,918 INFO L231 Difference]: Finished difference. Result has 242 places, 283 transitions, 3574 flow [2024-06-27 18:49:59,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3574, PETRI_PLACES=242, PETRI_TRANSITIONS=283} [2024-06-27 18:49:59,919 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-27 18:49:59,919 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 283 transitions, 3574 flow [2024-06-27 18:49:59,919 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 18:49:59,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:59,920 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 18:49:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:49:59,920 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 18:49:59,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 927959549, now seen corresponding path program 6 times [2024-06-27 18:49:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:59,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998339554] [2024-06-27 18:49:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:02,607 INFO 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 18:50:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998339554] [2024-06-27 18:50:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998339554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:02,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:02,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:50:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153317902] [2024-06-27 18:50:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:50:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:50:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:50:02,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:02,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 283 transitions, 3574 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 18:50:02,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:02,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:02,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:05,817 INFO L124 PetriNetUnfolderBase]: 8385/13335 cut-off events. [2024-06-27 18:50:05,817 INFO L125 PetriNetUnfolderBase]: For 337065/337121 co-relation queries the response was YES. [2024-06-27 18:50:05,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78697 conditions, 13335 events. 8385/13335 cut-off events. For 337065/337121 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 90069 event pairs, 2012 based on Foata normal form. 26/13352 useless extension candidates. Maximal degree in co-relation 78584. Up to 11875 conditions per place. [2024-06-27 18:50:05,963 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 260 selfloop transitions, 60 changer transitions 0/327 dead transitions. [2024-06-27 18:50:05,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4471 flow [2024-06-27 18:50:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:50:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:50:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 18:50:05,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045592705167173 [2024-06-27 18:50:05,964 INFO L175 Difference]: Start difference. First operand has 242 places, 283 transitions, 3574 flow. Second operand 7 states and 166 transitions. [2024-06-27 18:50:05,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4471 flow [2024-06-27 18:50:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 327 transitions, 4296 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 18:50:06,904 INFO L231 Difference]: Finished difference. Result has 245 places, 287 transitions, 3595 flow [2024-06-27 18:50:06,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3595, PETRI_PLACES=245, PETRI_TRANSITIONS=287} [2024-06-27 18:50:06,905 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 194 predicate places. [2024-06-27 18:50:06,905 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 287 transitions, 3595 flow [2024-06-27 18:50:06,905 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 18:50:06,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:06,905 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 18:50:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:50:06,906 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 18:50:06,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:06,906 INFO L85 PathProgramCache]: Analyzing trace with hash 794305839, now seen corresponding path program 2 times [2024-06-27 18:50:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926318928] [2024-06-27 18:50:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:09,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926318928] [2024-06-27 18:50:09,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926318928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:09,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:09,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786710807] [2024-06-27 18:50:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:10,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:50:10,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 287 transitions, 3595 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:50:10,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:10,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:50:10,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:12,874 INFO L124 PetriNetUnfolderBase]: 7804/12556 cut-off events. [2024-06-27 18:50:12,874 INFO L125 PetriNetUnfolderBase]: For 355987/356052 co-relation queries the response was YES. [2024-06-27 18:50:12,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74703 conditions, 12556 events. 7804/12556 cut-off events. For 355987/356052 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 86804 event pairs, 1578 based on Foata normal form. 50/12376 useless extension candidates. Maximal degree in co-relation 74589. Up to 10661 conditions per place. [2024-06-27 18:50:13,052 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 231 selfloop transitions, 40 changer transitions 0/329 dead transitions. [2024-06-27 18:50:13,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 329 transitions, 4353 flow [2024-06-27 18:50:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:50:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:50:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:50:13,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 18:50:13,054 INFO L175 Difference]: Start difference. First operand has 245 places, 287 transitions, 3595 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:50:13,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 329 transitions, 4353 flow [2024-06-27 18:50:14,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 329 transitions, 4270 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 18:50:14,131 INFO L231 Difference]: Finished difference. Result has 249 places, 288 transitions, 3616 flow [2024-06-27 18:50:14,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3512, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3616, PETRI_PLACES=249, PETRI_TRANSITIONS=288} [2024-06-27 18:50:14,131 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-27 18:50:14,132 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 288 transitions, 3616 flow [2024-06-27 18:50:14,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:50:14,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:14,132 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 18:50:14,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:50:14,132 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 18:50:14,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash 942253277, now seen corresponding path program 3 times [2024-06-27 18:50:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:14,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025673990] [2024-06-27 18:50:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:17,147 INFO 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 18:50:17,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025673990] [2024-06-27 18:50:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025673990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:17,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327136223] [2024-06-27 18:50:17,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:17,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:50:17,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 288 transitions, 3616 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:50:17,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:17,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:50:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:20,089 INFO L124 PetriNetUnfolderBase]: 7891/12730 cut-off events. [2024-06-27 18:50:20,090 INFO L125 PetriNetUnfolderBase]: For 352238/352307 co-relation queries the response was YES. [2024-06-27 18:50:20,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75623 conditions, 12730 events. 7891/12730 cut-off events. For 352238/352307 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88393 event pairs, 1600 based on Foata normal form. 46/12551 useless extension candidates. Maximal degree in co-relation 75508. Up to 10378 conditions per place. [2024-06-27 18:50:20,261 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 233 selfloop transitions, 44 changer transitions 0/335 dead transitions. [2024-06-27 18:50:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 335 transitions, 4482 flow [2024-06-27 18:50:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:50:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:50:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:50:20,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 18:50:20,262 INFO L175 Difference]: Start difference. First operand has 249 places, 288 transitions, 3616 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:50:20,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 335 transitions, 4482 flow [2024-06-27 18:50:20,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 335 transitions, 4404 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:20,989 INFO L231 Difference]: Finished difference. Result has 252 places, 291 transitions, 3717 flow [2024-06-27 18:50:20,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3717, PETRI_PLACES=252, PETRI_TRANSITIONS=291} [2024-06-27 18:50:20,989 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-06-27 18:50:20,989 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 291 transitions, 3717 flow [2024-06-27 18:50:20,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 18:50:20,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:20,990 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 18:50:20,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:50:20,990 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 18:50:20,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1182369539, now seen corresponding path program 1 times [2024-06-27 18:50:20,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:20,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148701502] [2024-06-27 18:50:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:20,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:23,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:23,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148701502] [2024-06-27 18:50:23,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148701502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:23,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:23,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990099946] [2024-06-27 18:50:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 291 transitions, 3717 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 18:50:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:23,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:27,046 INFO L124 PetriNetUnfolderBase]: 8727/14097 cut-off events. [2024-06-27 18:50:27,047 INFO L125 PetriNetUnfolderBase]: For 360002/360006 co-relation queries the response was YES. [2024-06-27 18:50:27,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82395 conditions, 14097 events. 8727/14097 cut-off events. For 360002/360006 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 98325 event pairs, 2561 based on Foata normal form. 3/14098 useless extension candidates. Maximal degree in co-relation 82278. Up to 12827 conditions per place. [2024-06-27 18:50:27,226 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 311 selfloop transitions, 22 changer transitions 0/340 dead transitions. [2024-06-27 18:50:27,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 340 transitions, 4585 flow [2024-06-27 18:50:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:50:27,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-27 18:50:27,227 INFO L175 Difference]: Start difference. First operand has 252 places, 291 transitions, 3717 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:50:27,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 340 transitions, 4585 flow [2024-06-27 18:50:28,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 340 transitions, 4522 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:50:28,388 INFO L231 Difference]: Finished difference. Result has 257 places, 295 transitions, 3797 flow [2024-06-27 18:50:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3797, PETRI_PLACES=257, PETRI_TRANSITIONS=295} [2024-06-27 18:50:28,389 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 206 predicate places. [2024-06-27 18:50:28,389 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 295 transitions, 3797 flow [2024-06-27 18:50:28,389 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 18:50:28,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:28,389 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 18:50:28,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:50:28,389 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 18:50:28,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1182249569, now seen corresponding path program 2 times [2024-06-27 18:50:28,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:28,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438286231] [2024-06-27 18:50:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:30,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:30,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438286231] [2024-06-27 18:50:30,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438286231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:30,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:30,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:30,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203817620] [2024-06-27 18:50:30,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:30,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:30,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:30,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 295 transitions, 3797 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 18:50:30,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:30,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:30,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:34,530 INFO L124 PetriNetUnfolderBase]: 8763/14149 cut-off events. [2024-06-27 18:50:34,530 INFO L125 PetriNetUnfolderBase]: For 373686/373690 co-relation queries the response was YES. [2024-06-27 18:50:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84210 conditions, 14149 events. 8763/14149 cut-off events. For 373686/373690 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 98611 event pairs, 2486 based on Foata normal form. 3/14150 useless extension candidates. Maximal degree in co-relation 84091. Up to 12654 conditions per place. [2024-06-27 18:50:34,681 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 293 selfloop transitions, 49 changer transitions 0/349 dead transitions. [2024-06-27 18:50:34,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 349 transitions, 4907 flow [2024-06-27 18:50:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 18:50:34,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 18:50:34,682 INFO L175 Difference]: Start difference. First operand has 257 places, 295 transitions, 3797 flow. Second operand 8 states and 193 transitions. [2024-06-27 18:50:34,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 349 transitions, 4907 flow [2024-06-27 18:50:35,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 349 transitions, 4792 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 18:50:35,761 INFO L231 Difference]: Finished difference. Result has 259 places, 303 transitions, 3979 flow [2024-06-27 18:50:35,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=259, PETRI_TRANSITIONS=303} [2024-06-27 18:50:35,761 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 208 predicate places. [2024-06-27 18:50:35,761 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 303 transitions, 3979 flow [2024-06-27 18:50:35,761 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 18:50:35,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:35,762 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 18:50:35,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:50:35,762 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 18:50:35,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:35,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1177600995, now seen corresponding path program 1 times [2024-06-27 18:50:35,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:35,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791328300] [2024-06-27 18:50:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:50:38,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:38,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791328300] [2024-06-27 18:50:38,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791328300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:38,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:38,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:38,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347236645] [2024-06-27 18:50:38,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:38,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:38,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 303 transitions, 3979 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 18:50:38,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:38,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:38,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:41,759 INFO L124 PetriNetUnfolderBase]: 8793/14199 cut-off events. [2024-06-27 18:50:41,759 INFO L125 PetriNetUnfolderBase]: For 391479/391483 co-relation queries the response was YES. [2024-06-27 18:50:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86002 conditions, 14199 events. 8793/14199 cut-off events. For 391479/391483 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 98951 event pairs, 2501 based on Foata normal form. 3/14200 useless extension candidates. Maximal degree in co-relation 85882. Up to 12883 conditions per place. [2024-06-27 18:50:41,934 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 310 selfloop transitions, 24 changer transitions 0/341 dead transitions. [2024-06-27 18:50:41,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 341 transitions, 4821 flow [2024-06-27 18:50:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:50:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:50:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:50:41,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 18:50:41,935 INFO L175 Difference]: Start difference. First operand has 259 places, 303 transitions, 3979 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:50:41,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 341 transitions, 4821 flow [2024-06-27 18:50:43,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 341 transitions, 4678 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 18:50:43,225 INFO L231 Difference]: Finished difference. Result has 262 places, 306 transitions, 3982 flow [2024-06-27 18:50:43,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3982, PETRI_PLACES=262, PETRI_TRANSITIONS=306} [2024-06-27 18:50:43,225 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 211 predicate places. [2024-06-27 18:50:43,225 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 306 transitions, 3982 flow [2024-06-27 18:50:43,225 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 18:50:43,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:43,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:50:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:50:43,226 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 18:50:43,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1163603535, now seen corresponding path program 3 times [2024-06-27 18:50:43,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702497815] [2024-06-27 18:50:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:45,752 INFO 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 18:50:45,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:45,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702497815] [2024-06-27 18:50:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702497815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:45,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227888515] [2024-06-27 18:50:45,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:45,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:45,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:45,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 3982 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 18:50:45,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:45,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:45,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:49,382 INFO L124 PetriNetUnfolderBase]: 8829/14251 cut-off events. [2024-06-27 18:50:49,382 INFO L125 PetriNetUnfolderBase]: For 404133/404137 co-relation queries the response was YES. [2024-06-27 18:50:49,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86798 conditions, 14251 events. 8829/14251 cut-off events. For 404133/404137 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 99388 event pairs, 2492 based on Foata normal form. 3/14252 useless extension candidates. Maximal degree in co-relation 86676. Up to 12728 conditions per place. [2024-06-27 18:50:49,557 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 293 selfloop transitions, 52 changer transitions 0/352 dead transitions. [2024-06-27 18:50:49,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 352 transitions, 4980 flow [2024-06-27 18:50:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:50:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:50:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 18:50:49,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053191489361702 [2024-06-27 18:50:49,559 INFO L175 Difference]: Start difference. First operand has 262 places, 306 transitions, 3982 flow. Second operand 8 states and 190 transitions. [2024-06-27 18:50:49,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 352 transitions, 4980 flow [2024-06-27 18:50:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 352 transitions, 4856 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:50,733 INFO L231 Difference]: Finished difference. Result has 265 places, 310 transitions, 4043 flow [2024-06-27 18:50:50,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4043, PETRI_PLACES=265, PETRI_TRANSITIONS=310} [2024-06-27 18:50:50,734 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 214 predicate places. [2024-06-27 18:50:50,734 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 310 transitions, 4043 flow [2024-06-27 18:50:50,734 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 18:50:50,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:50,734 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 18:50:50,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:50:50,734 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 18:50:50,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:50,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1648607713, now seen corresponding path program 2 times [2024-06-27 18:50:50,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:50,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309715285] [2024-06-27 18:50:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:50,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:50:53,458 INFO 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 18:50:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:50:53,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309715285] [2024-06-27 18:50:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309715285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:50:53,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:50:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:50:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177903844] [2024-06-27 18:50:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:50:53,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:50:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:50:53,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:50:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:50:53,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:50:53,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 310 transitions, 4043 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 18:50:53,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:50:53,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:50:53,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:50:56,647 INFO L124 PetriNetUnfolderBase]: 8859/14306 cut-off events. [2024-06-27 18:50:56,647 INFO L125 PetriNetUnfolderBase]: For 411620/411633 co-relation queries the response was YES. [2024-06-27 18:50:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87265 conditions, 14306 events. 8859/14306 cut-off events. For 411620/411633 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 99744 event pairs, 2496 based on Foata normal form. 9/14312 useless extension candidates. Maximal degree in co-relation 87142. Up to 12973 conditions per place. [2024-06-27 18:50:56,847 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 312 selfloop transitions, 24 changer transitions 0/343 dead transitions. [2024-06-27 18:50:56,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 343 transitions, 4881 flow [2024-06-27 18:50:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:50:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:50:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 18:50:56,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48024316109422494 [2024-06-27 18:50:56,848 INFO L175 Difference]: Start difference. First operand has 265 places, 310 transitions, 4043 flow. Second operand 7 states and 158 transitions. [2024-06-27 18:50:56,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 343 transitions, 4881 flow [2024-06-27 18:50:58,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 343 transitions, 4746 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 18:50:58,172 INFO L231 Difference]: Finished difference. Result has 267 places, 313 transitions, 4060 flow [2024-06-27 18:50:58,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3908, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4060, PETRI_PLACES=267, PETRI_TRANSITIONS=313} [2024-06-27 18:50:58,172 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 216 predicate places. [2024-06-27 18:50:58,173 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 313 transitions, 4060 flow [2024-06-27 18:50:58,173 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 18:50:58,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:50:58,173 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 18:50:58,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:50:58,173 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 18:50:58,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:50:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash 794787021, now seen corresponding path program 3 times [2024-06-27 18:50:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:50:58,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718575424] [2024-06-27 18:50:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:50:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:50:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:00,891 INFO 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 18:51:00,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:00,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718575424] [2024-06-27 18:51:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718575424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:00,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:51:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474418787] [2024-06-27 18:51:00,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:51:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:51:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:51:00,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 313 transitions, 4060 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 18:51:00,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:00,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:03,991 INFO L124 PetriNetUnfolderBase]: 8854/14299 cut-off events. [2024-06-27 18:51:03,991 INFO L125 PetriNetUnfolderBase]: For 421959/421972 co-relation queries the response was YES. [2024-06-27 18:51:04,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87428 conditions, 14299 events. 8854/14299 cut-off events. For 421959/421972 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 99662 event pairs, 2459 based on Foata normal form. 9/14305 useless extension candidates. Maximal degree in co-relation 87304. Up to 12894 conditions per place. [2024-06-27 18:51:04,158 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 307 selfloop transitions, 32 changer transitions 0/346 dead transitions. [2024-06-27 18:51:04,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 4910 flow [2024-06-27 18:51:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:51:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:51:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 18:51:04,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48024316109422494 [2024-06-27 18:51:04,159 INFO L175 Difference]: Start difference. First operand has 267 places, 313 transitions, 4060 flow. Second operand 7 states and 158 transitions. [2024-06-27 18:51:04,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 4910 flow [2024-06-27 18:51:05,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 346 transitions, 4780 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 18:51:05,467 INFO L231 Difference]: Finished difference. Result has 269 places, 316 transitions, 4104 flow [2024-06-27 18:51:05,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=269, PETRI_TRANSITIONS=316} [2024-06-27 18:51:05,467 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 218 predicate places. [2024-06-27 18:51:05,467 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 316 transitions, 4104 flow [2024-06-27 18:51:05,467 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 18:51:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:05,467 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 18:51:05,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:51:05,468 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 18:51:05,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash 786209197, now seen corresponding path program 4 times [2024-06-27 18:51:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392428024] [2024-06-27 18:51:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:08,063 INFO 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 18:51:08,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:08,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392428024] [2024-06-27 18:51:08,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392428024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:08,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:08,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:51:08,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469888924] [2024-06-27 18:51:08,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:08,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:51:08,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:08,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:51:08,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:51:08,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:08,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 316 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 18:51:08,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:08,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:08,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:11,571 INFO L124 PetriNetUnfolderBase]: 8848/14287 cut-off events. [2024-06-27 18:51:11,572 INFO L125 PetriNetUnfolderBase]: For 430958/430965 co-relation queries the response was YES. [2024-06-27 18:51:11,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87673 conditions, 14287 events. 8848/14287 cut-off events. For 430958/430965 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 99552 event pairs, 2521 based on Foata normal form. 3/14285 useless extension candidates. Maximal degree in co-relation 87548. Up to 12758 conditions per place. [2024-06-27 18:51:11,755 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 293 selfloop transitions, 52 changer transitions 0/352 dead transitions. [2024-06-27 18:51:11,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 352 transitions, 4882 flow [2024-06-27 18:51:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:51:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:51:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-27 18:51:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 18:51:11,756 INFO L175 Difference]: Start difference. First operand has 269 places, 316 transitions, 4104 flow. Second operand 8 states and 184 transitions. [2024-06-27 18:51:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 352 transitions, 4882 flow [2024-06-27 18:51:13,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 352 transitions, 4690 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 18:51:13,294 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 4023 flow [2024-06-27 18:51:13,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4023, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-27 18:51:13,295 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 221 predicate places. [2024-06-27 18:51:13,295 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 4023 flow [2024-06-27 18:51:13,295 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 18:51:13,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:13,295 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 18:51:13,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:51:13,295 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 18:51:13,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1867654160, now seen corresponding path program 1 times [2024-06-27 18:51:13,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:13,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332351894] [2024-06-27 18:51:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:15,592 INFO 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 18:51:15,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332351894] [2024-06-27 18:51:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332351894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:15,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:51:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113946177] [2024-06-27 18:51:15,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:15,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:51:15,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:15,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:51:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:51:15,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:51:15,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 4023 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:15,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:15,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:51:15,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:19,360 INFO L124 PetriNetUnfolderBase]: 8672/13895 cut-off events. [2024-06-27 18:51:19,360 INFO L125 PetriNetUnfolderBase]: For 447526/447622 co-relation queries the response was YES. [2024-06-27 18:51:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86800 conditions, 13895 events. 8672/13895 cut-off events. For 447526/447622 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 96956 event pairs, 1748 based on Foata normal form. 74/13747 useless extension candidates. Maximal degree in co-relation 86674. Up to 11697 conditions per place. [2024-06-27 18:51:19,533 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 300 selfloop transitions, 56 changer transitions 0/417 dead transitions. [2024-06-27 18:51:19,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 417 transitions, 5501 flow [2024-06-27 18:51:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:19,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-06-27 18:51:19,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528046421663443 [2024-06-27 18:51:19,537 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 4023 flow. Second operand 11 states and 273 transitions. [2024-06-27 18:51:19,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 417 transitions, 5501 flow [2024-06-27 18:51:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 417 transitions, 5336 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:51:20,668 INFO L231 Difference]: Finished difference. Result has 278 places, 347 transitions, 4491 flow [2024-06-27 18:51:20,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4491, PETRI_PLACES=278, PETRI_TRANSITIONS=347} [2024-06-27 18:51:20,669 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 227 predicate places. [2024-06-27 18:51:20,669 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 347 transitions, 4491 flow [2024-06-27 18:51:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:20,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:20,669 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 18:51:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:51:20,670 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 18:51:20,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash 641501110, now seen corresponding path program 2 times [2024-06-27 18:51:20,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:20,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877037296] [2024-06-27 18:51:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:51:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877037296] [2024-06-27 18:51:22,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877037296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:22,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:22,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:51:22,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254451443] [2024-06-27 18:51:22,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:22,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:51:22,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:51:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:51:22,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:51:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 347 transitions, 4491 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 18:51:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:22,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:51:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:25,878 INFO L124 PetriNetUnfolderBase]: 9051/14468 cut-off events. [2024-06-27 18:51:25,879 INFO L125 PetriNetUnfolderBase]: For 479719/479817 co-relation queries the response was YES. [2024-06-27 18:51:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92043 conditions, 14468 events. 9051/14468 cut-off events. For 479719/479817 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 101862 event pairs, 1789 based on Foata normal form. 79/14300 useless extension candidates. Maximal degree in co-relation 91913. Up to 11748 conditions per place. [2024-06-27 18:51:26,087 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 302 selfloop transitions, 71 changer transitions 0/434 dead transitions. [2024-06-27 18:51:26,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 5746 flow [2024-06-27 18:51:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:51:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:51:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-06-27 18:51:26,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680851063829787 [2024-06-27 18:51:26,088 INFO L175 Difference]: Start difference. First operand has 278 places, 347 transitions, 4491 flow. Second operand 10 states and 267 transitions. [2024-06-27 18:51:26,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 5746 flow [2024-06-27 18:51:27,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 434 transitions, 5649 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 18:51:27,452 INFO L231 Difference]: Finished difference. Result has 287 places, 355 transitions, 4738 flow [2024-06-27 18:51:27,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4738, PETRI_PLACES=287, PETRI_TRANSITIONS=355} [2024-06-27 18:51:27,453 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 236 predicate places. [2024-06-27 18:51:27,453 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 355 transitions, 4738 flow [2024-06-27 18:51:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 18:51:27,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:27,453 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 18:51:27,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:51:27,453 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 18:51:27,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:27,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1627265736, now seen corresponding path program 1 times [2024-06-27 18:51:27,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:27,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769893701] [2024-06-27 18:51:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:27,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:51:29,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769893701] [2024-06-27 18:51:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769893701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:29,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:51:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706961986] [2024-06-27 18:51:29,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:29,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:51:29,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:51:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:51:29,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:29,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 355 transitions, 4738 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:29,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:29,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:29,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:33,464 INFO L124 PetriNetUnfolderBase]: 10743/16750 cut-off events. [2024-06-27 18:51:33,464 INFO L125 PetriNetUnfolderBase]: For 520099/520122 co-relation queries the response was YES. [2024-06-27 18:51:33,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108488 conditions, 16750 events. 10743/16750 cut-off events. For 520099/520122 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 114729 event pairs, 2016 based on Foata normal form. 22/16769 useless extension candidates. Maximal degree in co-relation 108354. Up to 14216 conditions per place. [2024-06-27 18:51:33,715 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 360 selfloop transitions, 158 changer transitions 0/525 dead transitions. [2024-06-27 18:51:33,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 525 transitions, 7862 flow [2024-06-27 18:51:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:51:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:51:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-27 18:51:33,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539651837524178 [2024-06-27 18:51:33,721 INFO L175 Difference]: Start difference. First operand has 287 places, 355 transitions, 4738 flow. Second operand 11 states and 279 transitions. [2024-06-27 18:51:33,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 525 transitions, 7862 flow [2024-06-27 18:51:35,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 525 transitions, 7667 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 18:51:35,484 INFO L231 Difference]: Finished difference. Result has 297 places, 439 transitions, 6319 flow [2024-06-27 18:51:35,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6319, PETRI_PLACES=297, PETRI_TRANSITIONS=439} [2024-06-27 18:51:35,485 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 18:51:35,485 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 439 transitions, 6319 flow [2024-06-27 18:51:35,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:35,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:35,485 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 18:51:35,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:51:35,485 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 18:51:35,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1633931976, now seen corresponding path program 2 times [2024-06-27 18:51:35,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:35,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597528512] [2024-06-27 18:51:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:35,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:37,257 INFO 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 18:51:37,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597528512] [2024-06-27 18:51:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597528512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:37,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:37,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:51:37,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026296402] [2024-06-27 18:51:37,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:37,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:51:37,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:51:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:51:37,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:37,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 439 transitions, 6319 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:37,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:37,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:37,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:41,800 INFO L124 PetriNetUnfolderBase]: 11110/17279 cut-off events. [2024-06-27 18:51:41,801 INFO L125 PetriNetUnfolderBase]: For 557767/557805 co-relation queries the response was YES. [2024-06-27 18:51:42,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116842 conditions, 17279 events. 11110/17279 cut-off events. For 557767/557805 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 118474 event pairs, 2067 based on Foata normal form. 34/17310 useless extension candidates. Maximal degree in co-relation 116702. Up to 14455 conditions per place. [2024-06-27 18:51:42,157 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 362 selfloop transitions, 207 changer transitions 0/576 dead transitions. [2024-06-27 18:51:42,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 576 transitions, 9403 flow [2024-06-27 18:51:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:51:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:51:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 18:51:42,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:51:42,158 INFO L175 Difference]: Start difference. First operand has 297 places, 439 transitions, 6319 flow. Second operand 10 states and 250 transitions. [2024-06-27 18:51:42,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 576 transitions, 9403 flow [2024-06-27 18:51:44,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 576 transitions, 8983 flow, removed 203 selfloop flow, removed 2 redundant places. [2024-06-27 18:51:44,875 INFO L231 Difference]: Finished difference. Result has 310 places, 506 transitions, 7889 flow [2024-06-27 18:51:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7889, PETRI_PLACES=310, PETRI_TRANSITIONS=506} [2024-06-27 18:51:44,876 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 259 predicate places. [2024-06-27 18:51:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 506 transitions, 7889 flow [2024-06-27 18:51:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:51:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:44,876 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 18:51:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:51:44,877 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 18:51:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 197071178, now seen corresponding path program 3 times [2024-06-27 18:51:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090927249] [2024-06-27 18:51:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:46,820 INFO 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 18:51:46,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090927249] [2024-06-27 18:51:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090927249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:51:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006113098] [2024-06-27 18:51:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:51:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:51:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:51:46,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:51:46,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 506 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 18:51:46,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:46,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:51:46,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:51:52,458 INFO L124 PetriNetUnfolderBase]: 11953/19031 cut-off events. [2024-06-27 18:51:52,458 INFO L125 PetriNetUnfolderBase]: For 646367/646505 co-relation queries the response was YES. [2024-06-27 18:51:52,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128124 conditions, 19031 events. 11953/19031 cut-off events. For 646367/646505 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 136854 event pairs, 2731 based on Foata normal form. 40/19001 useless extension candidates. Maximal degree in co-relation 127977. Up to 14248 conditions per place. [2024-06-27 18:51:52,756 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 463 selfloop transitions, 122 changer transitions 0/653 dead transitions. [2024-06-27 18:51:52,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 653 transitions, 10555 flow [2024-06-27 18:51:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:51:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:51:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 310 transitions. [2024-06-27 18:51:52,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-27 18:51:52,757 INFO L175 Difference]: Start difference. First operand has 310 places, 506 transitions, 7889 flow. Second operand 12 states and 310 transitions. [2024-06-27 18:51:52,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 653 transitions, 10555 flow [2024-06-27 18:51:55,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 653 transitions, 10230 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-27 18:51:55,247 INFO L231 Difference]: Finished difference. Result has 321 places, 538 transitions, 8462 flow [2024-06-27 18:51:55,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8462, PETRI_PLACES=321, PETRI_TRANSITIONS=538} [2024-06-27 18:51:55,247 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 270 predicate places. [2024-06-27 18:51:55,248 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 538 transitions, 8462 flow [2024-06-27 18:51:55,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 18:51:55,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:51:55,248 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 18:51:55,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:51:55,248 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 18:51:55,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:51:55,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1120352020, now seen corresponding path program 3 times [2024-06-27 18:51:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:51:55,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483281029] [2024-06-27 18:51:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:51:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:51:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:51:57,644 INFO 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 18:51:57,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:51:57,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483281029] [2024-06-27 18:51:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483281029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:51:57,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:51:57,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:51:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601309008] [2024-06-27 18:51:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:51:57,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:51:57,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:51:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:51:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:51:57,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:51:57,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 538 transitions, 8462 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 18:51:57,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:51:57,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:51:57,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:03,748 INFO L124 PetriNetUnfolderBase]: 12872/20043 cut-off events. [2024-06-27 18:52:03,749 INFO L125 PetriNetUnfolderBase]: For 668427/668447 co-relation queries the response was YES. [2024-06-27 18:52:03,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140122 conditions, 20043 events. 12872/20043 cut-off events. For 668427/668447 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 140550 event pairs, 2779 based on Foata normal form. 24/20065 useless extension candidates. Maximal degree in co-relation 139972. Up to 17937 conditions per place. [2024-06-27 18:52:04,029 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 542 selfloop transitions, 136 changer transitions 0/685 dead transitions. [2024-06-27 18:52:04,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 685 transitions, 11471 flow [2024-06-27 18:52:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:52:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:52:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 298 transitions. [2024-06-27 18:52:04,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283687943262412 [2024-06-27 18:52:04,030 INFO L175 Difference]: Start difference. First operand has 321 places, 538 transitions, 8462 flow. Second operand 12 states and 298 transitions. [2024-06-27 18:52:04,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 685 transitions, 11471 flow [2024-06-27 18:52:06,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 685 transitions, 11304 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 18:52:06,849 INFO L231 Difference]: Finished difference. Result has 329 places, 590 transitions, 9689 flow [2024-06-27 18:52:06,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9689, PETRI_PLACES=329, PETRI_TRANSITIONS=590} [2024-06-27 18:52:06,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 278 predicate places. [2024-06-27 18:52:06,850 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 590 transitions, 9689 flow [2024-06-27 18:52:06,850 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 18:52:06,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:06,850 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 18:52:06,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:52:06,850 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 18:52:06,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -808923850, now seen corresponding path program 4 times [2024-06-27 18:52:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:06,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242202509] [2024-06-27 18:52:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:52:09,065 INFO 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 18:52:09,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:52:09,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242202509] [2024-06-27 18:52:09,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242202509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:52:09,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:52:09,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:52:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045529875] [2024-06-27 18:52:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:52:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:52:09,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:52:09,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:52:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:52:09,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:52:09,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 590 transitions, 9689 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 18:52:09,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:52:09,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:52:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:52:15,468 INFO L124 PetriNetUnfolderBase]: 13106/20389 cut-off events. [2024-06-27 18:52:15,468 INFO L125 PetriNetUnfolderBase]: For 691373/691393 co-relation queries the response was YES. [2024-06-27 18:52:15,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143834 conditions, 20389 events. 13106/20389 cut-off events. For 691373/691393 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 143039 event pairs, 2779 based on Foata normal form. 22/20409 useless extension candidates. Maximal degree in co-relation 143682. Up to 18103 conditions per place. [2024-06-27 18:52:15,756 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 557 selfloop transitions, 164 changer transitions 0/728 dead transitions. [2024-06-27 18:52:15,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 728 transitions, 12460 flow [2024-06-27 18:52:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:52:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:52:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 342 transitions. [2024-06-27 18:52:15,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2024-06-27 18:52:15,757 INFO L175 Difference]: Start difference. First operand has 329 places, 590 transitions, 9689 flow. Second operand 14 states and 342 transitions. [2024-06-27 18:52:15,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 728 transitions, 12460 flow [2024-06-27 18:52:18,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 728 transitions, 11989 flow, removed 183 selfloop flow, removed 5 redundant places. [2024-06-27 18:52:18,675 INFO L231 Difference]: Finished difference. Result has 338 places, 618 transitions, 10173 flow [2024-06-27 18:52:18,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9306, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10173, PETRI_PLACES=338, PETRI_TRANSITIONS=618} [2024-06-27 18:52:18,675 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 287 predicate places. [2024-06-27 18:52:18,675 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 618 transitions, 10173 flow [2024-06-27 18:52:18,675 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 18:52:18,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:52:18,675 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 18:52:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:52:18,676 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 18:52:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:52:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 831562656, now seen corresponding path program 1 times [2024-06-27 18:52:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:52:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480647030] [2024-06-27 18:52:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:52:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:52:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat